WO2002007343A1 - Dispositif d'etalonnage, dispositif adaptatif en reseau, procede d'etalonnage, support d'enregistrement de programme et programme - Google Patents
Dispositif d'etalonnage, dispositif adaptatif en reseau, procede d'etalonnage, support d'enregistrement de programme et programme Download PDFInfo
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- WO2002007343A1 WO2002007343A1 PCT/JP2001/006069 JP0106069W WO0207343A1 WO 2002007343 A1 WO2002007343 A1 WO 2002007343A1 JP 0106069 W JP0106069 W JP 0106069W WO 0207343 A1 WO0207343 A1 WO 0207343A1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/084—Equal gain combining, only phase adjustments
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
Definitions
- the present invention relates to a calibration apparatus for measuring a characteristic difference between a transmission system and a reception system in a plurality of wireless systems in an adaptive array apparatus for performing wireless communication, an adaptive array apparatus, a calibration method, and a computer-readable method.
- the present invention relates to a program recording medium for storing a possible program and a program. Background art
- Spatial multiplexing refers to forming different directivity patterns (referred to as array antenna patterns) for a plurality of mobile stations using an adaptive array device, so that multiple This is a system in which transmission and reception signals of mobile stations are multiplexed for communication.
- the adaptive array device includes a plurality of radio units each including an antenna, a transmission unit, and a reception unit, and adjusts an amplitude and a phase of a reception signal and a transmission signal input / output to / from each radio unit.
- This is a device that forms a directivity pattern (called an array antenna pattern) as a whole.
- the array antenna pattern is formed by weighting a reception signal and a transmission signal input to and output from each radio unit with a weight coefficient (also referred to as a weight vector) for adjusting amplitude and phase.
- the calculation of the gate vector is performed by a DSP (Digital Signal Processor) in the adaptive array device.
- DSP Digital Signal Processor
- the mobile phone side has physical restrictions such as size and antenna, so the mobile B talker side does not control the directional pattern, Directivity at both reception and transmission at the station
- the pattern is formed. That is, the wireless base station is configured to form the same array antenna pattern at the time of transmission as the array antenna pattern optimally formed at the time of reception.
- the same array antenna pattern is not necessarily actually formed at the time of transmission and reception.
- the difference between the transmission characteristics of the transmitting unit and the receiving unit is due to the fact that they are physically separate circuits and the inherent variation in the characteristics of the circuit elements. Variations in the characteristics of circuit elements occur due to individual differences and temperature changes in the operating environment, especially in the LNA (low-noise amplifier) in the receiver and the HPA (high-power amplifier) in the transmitter. As a result, transmission characteristics such as the amount of phase rotation and the amount of amplitude fluctuation that occur when a signal passes between the transmitting unit and the receiving unit differ.
- the difference in transmission characteristics between the receiving unit and the transmitting unit directly affects the error in the array antenna pattern between the time of reception and the time of transmission. For this reason, it is necessary to determine the transmission characteristic difference between the transmission unit and the reception unit and perform calibration to compensate for the transmission characteristic difference. For example, there is a calibration method in Japanese Patent Application Laid-Open No. H11-131926 "Array antenna device".
- the array antenna apparatus includes a calibration desired signal generating means, a calibration interference signal generating means, a power control means for controlling the power of the calibration interference signal, and a power control of the calibration desired signal. And a distributing means for distributing the combined signal to each antenna as an additional device, and configured to compensate for the transmission characteristics of the receiving system.
- the present invention has been made in view of the above problems, and provides a calibration device, an adaptive array device, a calibration method, a program recording medium, and a program for performing a calibration without providing an additional device in a device to be measured.
- the purpose is.
- a calibration device of the present invention includes at least two wireless units including first and second wireless units each including a transmitting unit, a receiving unit, and an antenna for forming an array antenna pattern and performing wireless communication.
- the first and second wireless units originally provided in the target wireless terminal form and transmit an array antenna pattern, and the first wireless unit determines the received signal level at the first or second antenna. Since the relative transmission characteristics between the wireless terminal and the second wireless unit are measured, there is an effect that calibration can be performed without providing an additional device for calibration in the wireless terminal to be measured.
- control unit changes the phase and the amplitude of the transmission signal of the second wireless unit during the transmission by the first and second wireless units, and the measuring unit uses the second antenna during the change.
- a configuration may be adopted in which a phase variation and an amplitude variation are measured as the transmission characteristics based on the phase and amplitude values when the received signal level is minimized.
- the calibration device further includes a transmitting unit that transmits a desired signal from the first antenna and a disturbing signal from the second antenna on the same frequency. After the first and second radio sections remove the interfering signal and allow the wireless terminal to calculate a weight vector for receiving a desired signal, transmit the signal using the calculated weight vector You may be comprised so that it may be performed.
- the null direction of the array antenna pattern at the time of reception can exactly match the null direction of the array antenna pattern at the time of transmission.
- the adaptive array device is an adaptive array device including a plurality of radio units each including a transmission unit, a reception unit, and an antenna, wherein the selection unit selects a radio unit from the plurality of radio units. And a control unit for transmitting a signal between the selected radio unit and the non-selected radio unit, and measuring transmission characteristics of the selected radio unit based on the received signal.
- a signal is transmitted between the selected radio unit and the non-selected radio unit, and the transmission characteristic of the selected radio unit is measured based on the received signal.
- transmission characteristics can be measured without adding.
- the transmission characteristics of that radio section can be measured, and if two radio sections are selected, two radio sections can be measured.
- the relative transmission characteristics (that is, relative transmission characteristics) of the sections can be measured.
- the selection unit may select a different radio unit after the measurement by the control unit, and the control unit may be configured to calculate a correction value for each radio unit based on a transmission characteristic measured for each radio unit. .
- the selection unit sequentially selects each of the wireless units, thereby measuring the transmission characteristics of each of the wireless units, and calculating a correction value for each of the wireless units from the measurement result.
- the selecting means selects two radio units, and the selected two radio units transmit the signal by forming an array antenna pattern in which null is directed to the antenna of the one radio unit which is not selected. And changing at least one of the phase and the amplitude of one of the two radio sections, wherein the control means minimizes the reception signal level in the null-pointed radio section during the change. At least one of the phase and the amplitude at the time of may be set as the transmission characteristic.
- the selected radio unit forms an array antenna pattern in which the null is directed to the antenna of one radio unit, so that the null at the time of reception matches the null at the time of transmission. Then, at least one of the phase and the amplitude is measured (ie, when the received signal level is minimized), so that the deviation of the array antenna pattern at the time of transmission can be easily measured.
- the two selected radio units use the weight vector at the time of array reception so as to reject a signal transmitted from one of the non-selected radio units, thereby aiming at the null.
- the array antenna pattern may be formed.
- an array antenna pattern pointing to nulls can be easily formed by directly using a vector upon array reception for array transmission.
- the adaptive array device of the present invention is an adaptive array device including a plurality of wireless units each including a transmitting unit, a receiving unit, and an antenna, wherein four wireless units out of the plurality of wireless units are first to fourth wireless units.
- the third and fourth radio units are selected using selection means for selecting the fourth radio unit, and a weight vector for directing the directivity to the antenna of the first radio unit and pointing null to the antenna of the second radio unit.
- control means for causing the unit to perform array transmission and measuring a relative transmission characteristic between the third wireless unit and the fourth wireless unit based on a signal level received by the first or second wireless unit.
- the selecting unit selects each wireless unit once as a fourth wireless unit a plurality of times, and the control unit sets one wireless unit as a reference based on the relative transmission characteristics measured for each wireless unit. May be calculated for each wireless unit. According to this configuration, in addition to the above effects, a relative correction value based on one wireless unit can be calculated for each wireless unit.
- the control means may further be configured to determine the legitimacy of the transmission characteristic based on whether or not the sum or the product of the relative transmission characteristics for each wireless unit is within a predetermined range. According to this configuration, the legitimacy of the measured transmission characteristics can be easily determined by utilizing the relative characteristics of the transmission characteristics for each wireless unit. Using an invalid correction value can be avoided.
- the calibration method of the present invention is a calibration method in an adaptive array device including a plurality of radio units each including a transmission unit, a reception unit, and an antenna, wherein the selection unit selects a radio unit from the plurality of radio units. And transmitting a signal between the selected radio unit and the non-selected radio unit, and measuring the transmission characteristics of the selected radio unit based on the received signal.
- the transmission characteristics of the radio unit can be measured without providing an additional device.
- the program recording medium of the present invention is a recording medium for storing a computer-readable program in an adaptive array device including a plurality of wireless units each including a transmitting unit, a receiving unit, and an antenna, Selecting a radio section from the radio section, transmitting a signal between the selected radio section and the non-selected radio section, and measuring transmission characteristics of the selected radio section based on the received signal. Steps and programs to be executed by the computer are stored.
- the computer in the adaptive array device that has read this program can measure the transmission characteristics of the wireless unit without using an additional device.
- FIG. 1 is a diagram showing a schematic configuration of a main part of an adaptive array device according to an embodiment of the present invention.
- FIG. 2 is an explanatory diagram showing a schematic operation of the adaptive array device when measuring a relative phase variation ⁇ (934, an amplitude variation Amp34).
- FIG. 3 is a block diagram showing the overall configuration of the radio base station.
- FIG. 4 is a block diagram showing a detailed configuration of the signal processing unit 50.
- FIG. 5 is a diagram showing a list of processing contents of each user processing unit.
- FIG. 6 is a diagram showing the correspondence between the physical wireless units 1 to 4 and the logical wireless units Antl to Ant4.
- FIG. 7 is a block diagram showing a detailed configuration of the user processing unit 51a.
- FIG. 8 is a flowchart showing the contents of the calibration process.
- FIG. 9 is a flowchart showing the continuation of the calibration process.
- FIG. 10 is a block diagram showing a configuration of a main part of the mobile phone according to the embodiment of the present invention.
- FIG. 11 is an explanatory diagram of a relative correction value.
- FIG. 12 is a block diagram showing a configuration of a measuring device for measuring a correction value of a mobile phone and the mobile phone.
- c 14 showing the appearance and physical connection of the present measuring device and the portable telephone 200 is a flow chart showing the contents of a calibration process performed by the control PC 330.
- FIG. 15 is a flowchart showing the continuation of the calibration process by the control PC 330.
- the radio base station, the mobile phone, and the measuring device according to the embodiment of the present invention will be described in the following order.
- the adaptive array device according to the embodiment of the present invention is a wireless base station of a mobile communication network.
- FIG. 1 is a diagram showing a schematic configuration of a main part of an adaptive array device according to an embodiment of the present invention.
- the adaptive array device consists of radio units 1 to 4 and a DSP.
- This adaptive array device measures a correction value by itself and performs communication using the measured correction value during normal communication. In other words, it also serves as a measuring device.
- Radio unit 1 is composed of antenna 10, transmitting unit 1 1 1 (TX 1 in the figure), receiving unit 1 12
- radio units 2 to 4 have the same configuration.
- S 1 and ARX1 in the figure indicate the amount of phase variation and the amount of amplitude variation caused by the signal passing through the antenna 10, the antenna switch 113 and the receiving unit 112, respectively, and c0TX1 and ATX1 indicate the transmitting unit 111.
- eRX2 to SRX4 and ARX2 to ARX4 also show the same phase fluctuation and amplitude fluctuation in each radio section.
- ⁇ 12 and Ampl2 indicate the relative phase variation and the amplitude variation of the radio unit 2 with respect to the radio unit 1, respectively.
- ⁇ / 23, ⁇ 34, ⁇ ⁇ 41, Amp23, Amp34, Amp41 also show the same relative phase variation and amplitude variation. These are the following (1) ⁇
- Amp34 ((ATX3 / ARX3) / (ATX4 / ARX4))
- Amp41 ((ATX4 / ARX4) / (ATX1 / ARX1)).
- the adaptive array device transmits and receives a known signal in the radio units 1 to 4 so as to match the array antenna pattern between transmission and reception while changing the phase and amplitude.
- the appropriate adjustment value By calculating the appropriate adjustment value, the relative phase variation and amplitude variation shown in the above equations (a) to (h) are detected, and the correction value for compensating the phase variation and amplitude variation is determined. I do.
- This correction value is expressed by the following equations (9) to (17).
- ⁇ _osei_4 A ⁇ 12 + ⁇ ⁇ 23 + ⁇ 034
- A_hosei_3 Ampl2 * Amp23
- A_hose i _4 Amp 12 * Amp23 + Amp34
- a — hose x is a correction value for the transmission signal when transmitting wireless section x (x is 1 to 4).
- the above correction values are relative correction values based on the wireless unit 1.
- the reason why the correction value may be a relative value is that the weight vector calculated at the time of reception is used when the ratio of the phase variation and the ratio of the amplitude variation at the time of reception are the same at the time of transmission. This is because sometimes the same array antenna pattern as that at the time of reception is obtained.
- the radio unit 1 is used as a reference. You may. Based on the radio unit 3, the phase correction value is expressed by (9 ') to (12'), and the amplitude correction value is expressed by (12 ') to (16,).
- FIGS. 2 (a) and 2 (b) are explanatory diagrams showing the schematic operation of the adaptive array device when measuring ⁇ 34 and Amp34 shown in equations (3) and (7).
- the radio unit 1 transmits a desired signal by itself and the radio unit 2 transmits an interference signal wave by itself on the same frequency ((in the figure).
- the desired signal and the interference signal represent different known data strings.
- the radio unit 3 and the radio unit 4 form an array antenna pattern for the radio unit 1 as a two-antenna adaptive array device and receive a desired signal ( ⁇ ). That is, the DSP 50 calculates a vector for separating the desired signal from the received wave in which the desired signal wave and the interference signal wave are multiplexed.
- each wireless unit switches between transmission and reception. That is, the radio units 3 and 4 use a weight vector calculated at the time of receiving the array as an adaptive array device with two antennas and transmit the desired signal in an array (3).
- the array antenna pattern in this array transmission is as shown by the solid line in Fig. 4 (b) if the phase and amplitude fluctuations of the transmitter in the radio units 3 and 4 are equal to those of the receiver.
- the same array antenna pattern as that at the time of array reception should be obtained, and the directivity is directed to the radio section 2 and the null (point or direction where radio waves cannot reach or is difficult to reach) is directed to the radio section 3 .
- the phase variation and the amplitude variation between the transmitting unit and the receiving unit are not equal, so that the array antenna pattern is shifted as shown by the broken line and the dashed line in FIG.
- the DSP 50 adds the phase compensation amount to the transmission signal of the radio unit 4 while gradually changing the phase compensation amount by 360 degrees (for example, every 180 degrees to +180 degrees).
- the radio unit 2 measures the received signal level according to this change (4).
- the DSP 50 gradually changes only the amplitude compensation amount Amp-coef of the transmission signal of the radio section 4 (for example, 0.1 to 0.5 to 2 times).
- Radio unit 2 measures the received signal level in accordance with this change (6).
- the adaptive array device measures the relative phase variation ⁇ S 34 and the relative amplitude variation Amp 34. Similarly, ⁇ 41 and ⁇ ? ⁇ 41, ⁇ 12 and Ampl2, 023 and Amp23 are measured.
- the DSP 50 determines whether or not the measured relative phase variation and amplitude variation are appropriate using the equations (17) and (18).
- S thre is, for example, a threshold value of about 1 degree.
- the left side of Eq. (17) is the sum of the right sides of Eqs. (1) to (4), and should ideally be 0 (degrees). Actually, a measurement error or a measurement error due to the influence of an extraneous wave or the like may occur.
- A_thre_rain and A_thre_max are, for example, threshold values of about 0.95 and 1.05, respectively.
- the product in the middle of Eq. (18) is the product of the right-hand side of Eqs. (5) to (8), and should ideally be 1.
- A_tre_min and A_tre_max It is desirable to make a decision.
- equation (18) If equation (18) is satisfied, the adaptive array system Then, the correction values shown in the equations (9) to (16) (or (9 ') to (16')) are calculated, and the transmission signal is corrected by the DSP 50 at the time of transmission.
- the adaptive array device when the adaptive array device receives an array on the radio unit 3 and the ferocious line unit 4 and transmits the array using the weight vector calculated at the time of receiving the array,
- the amount of phase fluctuation at the time of transmission with respect to the time of reception occurs by ( ⁇ TX3-ARX3) in the radio unit 3 and by ( ⁇ 4 ⁇ 4) in the radio unit 4.
- the amount of amplitude fluctuation at the time of transmission with respect to the time of reception is (ATX3 / ARX3) in radio section 3 and (ATX4 / ARX4) in radio section 4.
- the fact that the reception level has become minimum means that the amount of phase variation in the radio units 3 and 4 has been compensated.
- FIG. 3 is a block diagram illustrating an overall configuration of the wireless base station according to the embodiment.
- the radio base station includes a baseband unit 70, a modem unit 60, a signal processing unit 50, front end units 11, 21, 31, 41, antennas 10 to 40, and a control unit 80.
- This wireless base station is an adaptive array device that wirelessly connects mobile stations by forming an array antenna pattern by weighting the transmission and reception signals for each antenna using multiple antennas. It is installed as a wireless base station to connect PHS telephones by the TDMAZTDD (Time Division Multiple Access / Time Division Duplex) method specified in It is.
- TDMAZTDD Time Division Multiple Access / Time Division Duplex
- the baseband unit 70 converts a plurality of signals (baseband signals indicating voice or data) between a plurality of lines connected via the telephone switching network and the modem unit 60 so as to conform to the TDM A / TDD frame.
- TDMA / TDD processing for multiplexing and demultiplexing is performed for each signal to be spatially multiplexed.
- the TDMAZTDD frame has a period of 5 ms and is composed of four transmission time slots and four reception time slots that are equally divided into eight.
- the baseband unit 70 multiplexes signals from a plurality of lines from a plurality of lines to the modem unit 60 for each TDMA / TDD frame for time division multiplexing, and further spatially multiplexes the signals. Output up to four signals to the modem unit 60 per transmission time slot for transmission. Also, the baseband unit 70 inputs up to four signals per reception time slot from the modem unit 60 to a plurality of lines from the modem unit 60, separates the time division multiplex, and outputs the signals to the plurality of lines. I do.
- the modem unit 60 modulates a signal input from the baseband unit 70 and demodulates a signal input from the signal processing unit 50.
- the modulation and demodulation method is ⁇ 4 shift QP SK.
- the signal processing unit 50 is a digital signal processor, and calculates a weight vector by executing a program. In particular, in the calibration process, a correction value for compensating the transmission characteristics between the reception and transmission of the radio units 1 to 4 is calculated.
- the front end units 11, 21, 31, and 41 convert each signal weighted by the signal processing unit 50 into an RF signal at the time of array transmission and transmit the RF signal from the antennas 10 to 40.
- the signal from 40 is converted into a signal in the baseband area and output to the signal processing unit 50.
- a set of the antenna 10 and the front end unit 11 is referred to as a radio unit 1.
- the other three sets of antennas and front end units are called radio units 2 to 4, respectively.
- the radio units 1 to 4 independently transmit and receive a desired signal or an interference signal from the signal processing unit 50 in the calibration process, respectively.
- the desired signal or interference signal can be ⁇ Receive the array.
- the control unit 80 controls the entire radio base station, such as switching between transmission and reception of each radio unit.
- FIG. 4 is a block diagram showing a detailed configuration of the signal processing unit 50.
- FIG. 2 is a block diagram showing functions realized by the signal processing unit 50 (DSP) executing a program.
- a signal processing unit 50 is composed of a user processing unit 51 a to 51 d, an adder 55 1 to 55 4, a transmission / reception switch 56 1 to 56 4, a correction value holding unit 57 0 , And a correction section 571-1574.
- the user processing units 51a to 51d are provided corresponding to up to four user signals spatially multiplexed in each time slot.
- Each user processing unit normally controls array reception and array transmission using all four radio units (except for the calibration processing). That is, at the time of reception, the vector is calculated from the received signals from the four radio units 1 to 4 and the switches 5 6 1 to 5 are used from the radio units 1 to 4 using this way vector.
- a user signal is extracted by combining the reception signals input through the radio signal transmission unit 64, and the user signals weighted using the weighting factors calculated in the immediately preceding reception time slot are transmitted to the radio units 1 to 4 during transmission. Output.
- each user processing unit controls array reception and array transmission of two antennas, and performs control of transmitting and receiving a desired signal independently from one radio unit instead of array transmission and reception. In some cases, control is performed so that interference signals are transmitted and received independently from one radio unit instead of array transmission and reception.
- the signal processing unit 50 performs a series of processes shown in FIGS.
- the adder 551 combines the weighted components of each user transmission signal for the radio unit 1.
- Fig. 2 (a) when the radio unit 1 transmits data alone, When the array transmission using two antennas is performed using the radio unit 1 as in (b), the transmission signal (desired signal, interference signal, etc.) from any user processing unit is not added to the other signals. Output as is.
- the adders 55 2 to 55 4 are the same as the adders 55 1, but differ in that they correspond to the radio units 2 to 4, respectively.
- the correction value holding unit 570 holds the correction values (0-hose 1 to / 9-hose i_4, A-hosei-1 to A-hose 4) calculated in the calibration process.
- the correction unit 571 transmits the signal from the adder 551 in accordance with one of the correction values held in the correction value holding unit 570 except for the calibration processing, in accordance with one of the correction values hose1 and A ⁇ 1.
- the signal is corrected and output to the radio unit 1 via the switch 561, and in the reproduction process, the transmission signal from the adder 551 is output to the radio unit 1 via the switch 561 as it is. .
- the phase compensation amount ⁇ and the amplitude adjustment value Amp are changed little by little to the transmission signal. give.
- correction units 572 to 574 The same applies to the correction units 572 to 574 except that the corresponding radio unit and the correction value stored in the correction value storage unit 570 are different.
- FIG. 7 is a block diagram showing a detailed configuration of the user processing unit 51a. Since the user processing units 51b to 51d have the same configuration, the user processing unit 51a will be described as a representative here.
- the user processing unit 5 la is composed of a byte calculation unit 53, an adder 54, a memory 55, a switch 5.6, a switch 57, a multiplier 52 1 to 52 4 and a multiplier 58. 1 to 5 84 are provided.
- the weight calculator 53 weights and adds the received signals S1R to S4R from the radio units 1 to 4 in each symbol period in the fixed bit pattern period in the reception time slot, except for the calibration process.
- the vector is calculated so that the error between the result obtained and the reference signal generated by the memory 55 is minimized.
- weight vectors for array reception by two antennas are calculated in the same manner.
- the array reception (calculation of the weight vector) with four antennas will be described. The same is true only with a decrease.
- the weight calculation unit 53 adjusts the values of Wl (tl) to W4 (tl) in the following equation (19) so as to minimize the error e (t).
- e (t) d (t)-(Wl (tl) * Xl '(t) + W2 (tl) * X2' (t) + 3 (tl) * X3 '(t) + W4 (t-1) * ⁇ 4 '(t))
- t is the timing in symbol units
- d (t) is the symbol data in the known reference signal (or training signal)
- Wl (t-l) to W4 (tl) are The weighting factor for each antenna calculated for the previous symbol or the weighting factor calculated in the previous reception time slot
- XK1) to X4 (t) are the received signals of antennas 10 to 40 .
- the weight vector is adjusted as described above for each symbol, and at the beginning of the section of the reference signal in the reception time slot, the error e (t) is at the end of the section of the reference signal even if the error e (t) is large. Converges to a minimum (or converges to 0).
- weight calculation section 53 outputs the calculated weighting factor to multipliers 52 1 to 52 4 in the symbol period in which the weighting factor in the reception time slot is calculated and in the symbol periods thereafter. In the transmission time slot, weight calculation section 53 outputs weighting coefficients calculated in the immediately preceding reception time slot to multipliers 581 to 584.
- the memory 55 stores waveform data of a symbol sequence representing a reference signal used in a process other than the calibration process (normal communication with a mobile station), waveform data of a symbol sequence representing a desired signal used in a calibration process, And waveform data of a symbol string representing the interference signal.
- the reference signal is read out to the byte calculation section 53 in a reception section of a known fixed bit pattern (fixed symbol) in the reception time slot in accordance with the symbol timing.
- fixed symbols include SS (start symbol), PR (preamble), and UW (unique word) that appear at the beginning of the reception time slot.
- the desired signal and the interference signal may be a symbol data sequence known as a PN (Pseudo random Noise) code, for example, and are desirably orthogonal to each other. If they are orthogonal to each other, the weight vector can be converged more quickly and the calculation can be performed accurately. is there.
- the timing for example, 0.5 symbol time
- the timing may be shifted. .
- Each user processing unit may have the same configuration, but for convenience of explanation, it is assumed that each user processing unit performs fixed processing in the calibration processing.
- FIG. 5 shows a list of the processing contents of each user processing unit.
- Antl to Ant4 mean logical wireless units that are associated with the physical wireless units 1 to 4 on a one-to-one basis.
- Figure 6 shows this correspondence. Although there may be many such correspondences, in the present embodiment, there are at least four correspondences as in cases 1 to 4 shown in FIG.
- the user processing unit 51a causes the Antl to transmit the desired signal alone, that is, generates the desired signal and supplies it to the Antl.
- the user processing unit 51b causes Ant2 to transmit the interference signal alone, that is, generates the interference signal and supplies it to Ant2.
- the user processing unit 51 c controls array reception of two antennas for each of the received signals from Ant3 and Ant4, that is, calculates a bit vector.
- the user processing unit 51 c controls the array transmission of the two antennas from Ant3 and Ant4 for the desired signal, that is, the calculated above-mentioned Weight the desired signal using the vector and supply it to Ant3 and Ant4. You. At this time, the user processing unit 51c changes the amount of phase compensation as indicated by 4 in FIG. 2 (b), and then changes the amplitude compensation amount Amp_coef as indicated by 6 in FIG. 2 (b). .
- the user processing unit 51a acquires a single received signal at Antl. Each time the phase compensation amount ⁇ and the amplitude compensation amount Amp_coef change, the user processing unit 51b acquires a single received signal from Ant2 and its received signal level from Ant2.
- FIGS. 8 and 9 are flowcharts showing the details of the calibration process.
- N in the figure is a variable for counting from 1 to 4.
- the signal processing unit 50 selects Antl to Ant4 as the logical wireless unit from the physical wireless units 1 to 4 (step 81). 82).
- Antl is selected for single transmission and reception of the desired signal
- Ant2 is selected for single transmission and reception of the interference signal
- Ant3 and Ant4 are selected for array reception and array transmission.
- the signal processing unit 50 transmits the desired signal from Ant1 and the interference signal from Ant2 (step 83).
- Ant3 and Ant4 are used as an adaptive array device having two antennas, and an array antenna pattern is formed for the desired signal from Ant1.
- Formation that is, the DSP 50 calculates a weight vector for separating the desired signal from the received wave in which the desired signal and the interference signal are multiplexed (step 84).
- the desired signal to Antl and the interference signal to Ant2 are supplied from the user processing units 51a and 51b, respectively.
- the vector for each received signal from Ant3 and Ant4 is calculated by the user processing unit 51c.
- the calibration process is performed at this point. May be ended, and the calibration process may be started again from the beginning.
- the signal processing unit 50 uses Ant3 and Ant4 as a two-antenna adaptive array device to perform array transmission of a desired signal using the calculated ⁇ eight vector. And switch Ant2 to single reception (Step 85). At this time, weighting by the weight vector is performed by the user processing unit 51c.
- the signal processing unit 50 transmits the signal to Ant4 while changing the phase compensation amount once every 180 degrees to +180 degrees while keeping the values of phase 0 Ant3, amplitude A1 Ant3, and A_Ant4 fixed.
- the received signal level in Ant2 is measured for each ⁇ (Steps 86 to 89).
- the amount of phase compensation ⁇ at this time is added to the transmission signal input from the user processing unit 51 c through the adder 554 in the correction unit 574 shown in FIG. 4 and output to Ant 4 through the switch 564.
- A_Ant4 A_Ant4_est * Amp_coef
- the amplitude compensation amount Amp_coef at this time is multiplied by the transmission signal input from the user processing unit 51c through the adder 554 in the correction unit 574 shown in FIG. 4 and output to Ant4 through the switch 564.
- the signal processing unit 50 performs the loop processing of steps 96 and 97 to generate the logical wireless units Antl to Ant4 selected from the physical wireless units 1 to 4. While changing the combination, measure ⁇ 041 and Amp41 in the second loop, measure 12 and Ampl2 in the third loop, and measure ⁇ 23 and Amp23 in the fourth loop.
- the signal processing unit 50 determines the measured relative phase variation ( ⁇ 34, ⁇ 041, ⁇ 12, ⁇ 22) and amplitude variation (Amp34, Amp41, It is determined whether Ampl2, Amp23) is appropriate (steps 98, 99). This judgment is based on whether both the equations (17) and (18) described above are satisfied. If any of these conditions is not satisfied, the calibration process may be terminated and restarted from the beginning.
- the signal processing unit 50 sets the phase correction value Jiose to 1 to Jiosei-4 and the amplitude correction values A_hosei_l to A_hosei_4 as already described (9 ′ ) It is calculated in accordance with the equation (16 ') (steps 100, 101). The calculated correction value is written to the correction value holding unit 570, and is used for correcting the transmission signal of each wireless unit at the time of normal array transmission other than calibration.
- one radio transmission is performed between two radio units selected from a plurality of radio units and another radio unit. Since the transmission characteristics of the radio unit selected based on the received signal are measured, the relative transmission characteristics of each radio unit can be calculated without providing an additional device. ⁇ 2. Mobile phone>
- the adaptive array device shown in Fig. 1 is a radio base station, and by using four antennas for transmission and reception, the relative correction value with respect to one radio unit (Calibration) could be performed within the array, but an adaptive array device that forms an array antenna pattern with two antennas and transmits / receives it.
- a mobile phone cannot measure the above correction value by itself. . In such a mobile phone, the correction value is measured in cooperation with another measuring device.
- the measured correction value is held, and only the transmission signal of an antenna other than the reference antenna is corrected by the correction value.
- the adaptive array device of the present invention is a mobile phone of a mobile communication network.
- the configuration in this case will be described first, and then the above measuring device will be described.
- FIG. 10 is a block diagram showing a configuration of a main part of the mobile phone according to the embodiment of the present invention.
- the mobile phone 200 includes a radio unit (hereinafter referred to as a radio unit A) including an antenna 210, a switching switch 213, a transmitting circuit 211, and a receiving circuit 212, an antenna 220, a switching switch 223, and a transmitting circuit 221.
- a radio unit (hereinafter referred to as a radio unit B) comprising a reception circuit 222, a DSP 260 (broken line frame in the figure), and an external IZF250 are provided, and an array antenna pattern is formed by two antennas for transmission and reception. This is an adaptive array device.
- the two antennas 210 and 220 may be rod-like rod antennas, planar pattern antennas, helical antennas at the rod ends, chip antennas (antennas mounted as chip components on the board), etc.
- antenna 210 is a rod antenna
- antenna 220 is a chip antenna.
- the DSP 260 shown by the broken line frame actually operates according to the program, but the operation is divided into functional blocks in the figure.
- DSP260 includes multipliers 214, 224, 215, 225, adders 230, demodulators 231, remodulators 232, memories 233, counters 234, switches 235, weight calculators 236, memories 237, and weight controllers 238.
- Multipliers 214 and 224 weight received signals input from receiving circuits 212 and 222 by multiplying them by weight vectors Wl and W2 from weight calculation section 236, respectively.
- Multipliers 215 and 225 weight the transmission signals input from modulation circuit 242 by multiplying them by weight vectors W1 and W2 from weight control section 238, and output the signals to transmission circuit 211 and phase shifter 240.
- the adder 230 adds the received signals weighted by the multipliers 214 and 224.
- Demodulation circuit 231 demodulates the received signal after addition by adder 230.
- the demodulation result is output as a received bit string.
- the remodulation circuit 232 remodulates the received bit string input from the demodulation circuit 231 into symbol data (symbol waveform data).
- the memory 233 holds a reference signal table.
- the reference signal table stores symbol data (symbol waveform data) representing a reference signal used in other than the carry-out processing (normal reception from a radio base station) and symbol data representing a desired signal used in a calibration process.
- symbol data symbol waveform data
- the reference signal and the desired signal are the same as those described in the radio base station.
- the counter 234 In normal reception, the counter 234 counts the number of symbols (from 0 to 120 in? 113) in synchronization with the symbol timing from the first symbol to the last symbol in the reception time slot. This count value is used to distinguish between a fixed bit pattern symbol period and a non-symbol period. In normal reception, the symbol period from the third symbol to the 16th symbol corresponds to the period of the fixed bit pattern of SS, PR, and UW.
- the switch 235 In normal reception, when the count value of the counter 234 indicates the symbol period of the fixed bit pattern, the switch 235 has symbol data (waveform data) representing a reference signal read from the memory 233. Is selected, and in other periods, the symbol data from the remodulation circuit 232 is selected. In the calibration process, the symbol data representing the desired signal read from the memory 233 is selected.
- the weight calculator 236 weights the received signals input from the receiving circuits 2 12 and 2 22 in both the normal reception and the reception in the calibration process, and adds the weighted results to the received signals.
- the vector is calculated for each symbol so as to minimize the error with the symbol data input from the switch 235.
- the calculation of the weight vector is the same as that of the weight calculation unit 53 described above.
- the memory 237 includes RAM and ROM, and stores the vector calculated by the byte calculator 236 and the relative correction value of the radio unit B with respect to the radio unit A.
- This byte vector may be a vector calculated for the last symbol of the reception time slot in normal reception, and is used in the transmission time slot immediately after the reception time slot, and the desired signal is used in the calibration process.
- the weight vector calculated by the reception of the signal is stored and used in the subsequent transmission of the desired signal.
- the weight vectors of the radio units A and B are W1 and W2.
- the correction value is expressed by the following equations (20) and (21), and the value measured in the calibration process is written to the ROM storage area in the memory 237 before shipment from the factory.
- FIG. 11 shows an explanatory diagram of the correction value.
- 0RX1 and ARX1 in the figure indicate the amount of phase change and the amount of amplitude change caused by the signal passing from the antenna 210 through the switch 213 and the receiving circuit 212, respectively.
- ⁇ TX1 and ATX1 indicate the amount of phase variation and the amount of amplitude variation caused by the signal passing from the transmission circuit 211 and the switching switch 213 to the antenna 210, respectively.
- eRX2 to RX4 and ARX2-ARX4 also show the same phase fluctuation and amplitude fluctuation in each radio unit.
- ⁇ (912, Ampl2) in the above (20) and (21) means the relative phase variation and amplitude variation of the radio unit B with respect to the radio unit A, respectively.
- weight control section 238 reads out weight vectors Wl and W2 from memory 237 in a transmission time slot and outputs them to multipliers 215 and 216. The same applies to the transmission of a desired signal in the calibration process.
- the correction control unit 239 reads the correction value 12 and Ampl2 from the memory 237 in the transmission time slot, and outputs them to the phase shifter 240 and the amplifier 241 respectively.
- the correction control unit 239 outputs ⁇ to the phase shifter 240 while changing ⁇ from 180 degrees to +180 degrees at the time of transmitting a desired signal, and outputs Amp to the phaser 240 gradually, for example (eg, 0.5 Output to the amplifier 241 while changing it.
- the phase shifter 240 corrects the phase of the transmission signal input from the multiplier 225 by the correction value input from the correction control unit 239.
- the amplifier 241 corrects the amplitude of the transmission signal input from the phase shifter 240 by the correction value Ampl2 input from the correction control unit 239, and outputs it to the transmission circuit 221.
- the modulation circuit 242 modulates a bit sequence to be transmitted in normal transmission, and (Symbol data) is generated.
- the external I / F 250 is a connector connected to the I / O port of the DSP 260 and the port of the memory of the DSP 260 (including the memories 233 and 237). Provided on a substrate.
- the external I / F 250 is connected to an external measurement device in the calibration process, and is used for input / output of various commands and their responses, programs, and data.
- an array antenna pattern is formed using the weight vector calculated in the reception time slot, received, and the weight is stored in the memory 237.
- the vector is stored, and an array antenna pattern is formed using the weight vector stored in the immediately following transmission time slot and transmitted.
- the correction control unit 239 corrects the transmission signal to the radio unit B using the correction value ⁇ 12 and Ampl2 stored in the memory 237.
- correction can be made so that the array antenna pattern at the time of reception and the array antenna pattern at the time of transmission do not shift.
- the difference between the phase and amplitude fluctuation characteristics of the radio unit A and the radio unit B can be corrected by simply correcting the transmission signal of the radio unit B without correcting the reference transmission signal of the radio unit A.
- the directivity at the time of transmission can be matched.
- the provision of the external IZF 250 allows the above correction value to be easily measured by performing a calibration process under the control of an external measuring device.
- the mobile phone 200 Since Ampl2 and Ampl2 have the same physical quantity as the vector, the mobile phone 200 stores the correction weight vector representing ⁇ 12 and Ampl2 in the memory 2337, and stores the phaser 240 and the amplifier. A configuration including a multiplier instead of 241 may be employed.
- the correction units 571 to 574 shown in FIG. 4 are also circuits equivalent to the phase shifter 240 and the amplifier 241 or circuits equivalent to the multiplier, respectively.
- FIG. 12 is a block diagram showing a configuration of a measuring device for measuring (calibrating) the correction value of the mobile phone in FIG. 10 and a mobile phone.
- the measuring device consists of a transmitting / receiving device 301, a transmitting device 302, a timing adjuster 331, a control PC 330, a clock generation circuit 3332, and an I / F unit 3333.
- a switch 315 is provided to receive a desired signal transmitted from the mobile phone 200 after transmitting the interference signal.
- the transmission circuit 311 transmits the interference signal input from the signal selection unit 312 from the antenna 310 via the switch 315.
- the signal selection unit 312 stores a symbol data sequence of a plurality of interference signals, selects one, and outputs the selected one to the transmission circuit 311.
- the plurality of interference signals are a first interference signal composed of a PN code and a second interference signal composed of a known code string including a fixed pit pattern (SS, PR, UW) which is the same as a normal transmission time slot.
- the selection of the interference signal depends on the instruction of the control PC 330.
- the receiving circuit 313 receives a transmission signal from the mobile phone 200 to the transmitting / receiving device 301 via the antenna 310 and the switch 315.
- the level measuring section 314 measures the reception signal level of the reception signal by the reception circuit 313 and notifies the control PC 330 of the measured reception signal level.
- the transmitting apparatus 302 has an antenna 320, a transmitting circuit 321 and a signal selecting section 322 to transmit a desired signal, in order to play the role of Ant1 shown in FIG.
- the transmission circuit 321 transmits a desired signal input from the signal selection unit 322 from the antenna 322 via the switch 325.
- the signal selection unit 3222 stores the symbol data strings of a plurality of desired signals, selects one of them, and outputs it to the transmission circuit 3221.
- the plurality of desired signals are orthogonal to the first interference signal It includes a first desired signal composed of a PN code and a second desired signal composed of a known code string including the same fixed bit pattern (SS, PR, UW) as a normal transmission time slot.
- the selection of the desired signal is performed according to an instruction from the control PC 330.
- the evening adjustment controller 3 3 1 is input from the signal selection unit 3 2 2.
- the output clock signal (symbol clock) is directly output to the transmission / reception device 301, and when the second interference signal and the second desired signal are selected by the signal selection unit 3222, respectively, the signal selection unit 3222
- the input clock signal is delayed by, for example, 0.5 symbol time, and output to the transmitting / receiving device 301, to the transmitting / receiving device 301.
- the reason for the delay is that the second interference signal and the second desired signal include the same fixed bit pattern (SS, PR, UW, etc.). That is, it is to facilitate separation of a desired signal in the mobile phone 200.
- the timing adjuster 331 is not delayed, but may be delayed to simplify the configuration.
- the control PC 330 transmits and receives the transmission / reception device 301 so as to measure the correction value of the radio unit B based on the radio unit A of the mobile phone 200, similarly to the calibration process shown in FIG.
- the 1 / part 33 33 is an interface connected to the external IZF 250 inside the mobile phone 200 and for inputting and outputting commands and data to and from the mobile phone 200.
- FIG. 13 shows an external view and an example of a physical connection between the measurement apparatus and the mobile phone 200.
- the mobile phone 200 shows only the board without the housing, and the I / F section 3333 is a connector that fits into the external I / F 250 on the board.
- the transmitting / receiving device 301 and the transmitting device 302 can be configured by a general signal generator. Alternatively, the transmitting / receiving device 301 and the transmitting device 302 may be configured by modifying a wireless base station or a mobile phone.
- the external IZF 250 may not be a connector but may be a plurality of pads provided on a substrate.
- the I / F section 3 3 3 has a probe connected to multiple pads. do it.
- the measurement device and the mobile phone shown in FIG. 13 be placed in an electromagnetically shielded environment such as an anechoic chamber during the calibration process.
- FIG. 14 and FIG. 15 are flowcharts showing the calibration process executed under the control of the control PC 330.
- This figure shows the processing basically the same as those in Fig. 8 and Fig. 9, but the entity that executes each step is different.
- (PC ⁇ K) indicates a step triggered by an instruction (command) or data from the control PC 330 to the mobile phone 200
- (PC ⁇ T) indicates a step from the control PC 330 to the transmitting / receiving device 301 or the transmitting device 302.
- a step triggered by an instruction (command) or data, and (PC) means a step to be processed in the control PC 330.
- n is a variable for counting from 1 to 2.
- control PC 330 uses Ant3 and Ant4 as an adaptive array device having two antennas to form an array antenna pattern with respect to a desired signal from Antl, that is, from a reception wave in which a desired signal and an interference signal are multiplexed.
- the mobile phone 200 is instructed to calculate a weight vector for separating a desired signal.
- weight calculation section 236 of mobile phone 200 calculates a weight vector for receiving the first desired signal (step 184).
- the mobile phone 200 sends the control PC 330 Notifying that, the control PC 330 ends the calibration process at this point and starts the calibration process again from the beginning. You may start.
- control PC 330 uses Ant3 and Ant4 as an adaptive array device with two antennas to transmit a desired signal using the calculated eight vectors. And instruct Ant2 (transmitter / receiver 301) to receive the desired signal.
- Ant3 transmitter / receiver 301
- the mobile phone 200 forms an array antenna pattern with the null pointing toward the transmitting device 302 and performs array transmission of the desired signal (step 185).
- the C330 changes the phase compensation amount ⁇ ⁇ 9 from 180 ° to + 180 ° every 1 degree while keeping the values of the phase Ant3, amplitude A-Ant3, and A_Ant4 fixed, and the phase amount to the Ant4 transmission signal.
- the complementary amount ⁇ S is added to the transmission signal from the multiplier 225 by the correction control unit 239 and the phase shifter 240 shown in FIG.
- A_Ant4 A_Ant4_est * Amp_coef
- gradually changing for example, 0.05 in the range of 0.5 to 2
- the measurement result is obtained by instructing the transmission / reception device 301, and stored in the internal memory (steps 191 to 194)
- control PC 330 exchanges Ant3 and Ant4, that is, sets Ant3 as the radio unit B and Ant4 as the radio unit A (steps 196 and 197) and performs the same processing (steps 183- Perform 1 9 5).
- steps 187 and 192 the phase shifter 240 and the amplifier 241 in the mobile phone 200 do not change the phase and amplitude, and the weight control section 238 performs the above ⁇ ⁇ Calculate the weight vector by adding A_coef to the weight vector W 2, and weight using the weight vector calculated by the multiplier 215.
- the relative correction value of the wireless unit A with respect to the wireless unit B, 92 Amp21 is measured.
- This correction value is not used in the mobile phone 200, but is used to determine the following correction value ⁇ »12, Ampl2, for validity.
- control PC 330 determines whether or not the measured relative phase variation ( ⁇ ⁇ 12, ⁇ 21) and amplitude variation (Ampl2, Amp21) are appropriate (steps 198, 1 9 9). This determination is based on whether or not the following equations (22) and (23) are both satisfied. This equation is the same except that equations (17) and (18) are binomial.
- control PC 330 does not satisfy any one of the equations (22) and (23), the calibration processing may be terminated and started again from the beginning. In that case, it is desirable to change the conditions such as changing the desired signal and the interference signal.
- the control PC 330 instructs the mobile phone 200 to write the correction value ⁇ 012 and Ampl2 to the memory 237 ( Step 200).
- the memory 237 of the mobile phone 200 stores the correction value ⁇ ⁇ 912 and Ampl2.
- the relative correction value of the wireless unit B with respect to the wireless unit A in the mobile phone 200 is measured, and the correction value is stored in the mobile phone 200. Set.
- the relative phase variation and amplitude variation were measured for all four radio units, but the correction value for each radio unit was calculated based on the number of all radio units. It suffices to measure the relative phase variation and amplitude variation for one less radio unit. For example, it is sufficient to measure cases 1 to 3 shown in Fig. 6. This is because the correction value is a relative value based on one radio unit, and the radio unit serving as a reference need not be corrected.
- the relative phase variation and amplitude variation are measured for all the radio units because the validity of the phase variation and amplitude variation by the equations (17) and (18) is used. This is for determining.
- the vector used for array transmission by Ant3 and Ant4 in Fig. 2 (b) may not be the one calculated by array reception in Fig. 2 (a).
- the weight vector used in the previous calibration process may be stored in the memory and used, or the vector having the property of turning null to Ant2 may be obtained from the outside. It may be stored in advance. In this case, the processing of FIG. 2A can be omitted. .
- the weight vector that directs forced null to Ant2 in Fig. 2 (a) may be calculated.
- Force null refers to pointing null in a particular direction.
- ⁇ and A_Arap when the reception signal level in Ant2 is minimized were determined as ⁇ 034 and Amp34.
- ⁇ and A-Amp when the received signal level at Antl becomes the maximum may be set to ⁇ 34 and Amp34. This is because the array antenna pattern in Fig. 2 (b) is formed so that the maximum gain is obtained for Antl.
- the correction value holding unit 570 also holds the phase fluctuation amount and the amplitude fluctuation amount of each radio unit, and partially updates the comparison Z with the newly measured phase fluctuation amount and amplitude fluctuation amount. It may be. If the comparison result is significantly different (greater than or equal to the threshold value), the calibration processing may be performed for all wireless units.
- the signal processing section 50 controls almost all of the calibration processing.
- the signal processing section 50 may be shared with the control section 80.
- a known signal such as an unmodulated signal may be transmitted from the transmitting side to the receiving side, and the amount of phase variation and the amount of amplitude variation may be measured from the signal input to the signal processing unit 50 from the wireless unit on the receiving side.
- the main part of the present invention in the adaptive array device as a radio base station is a signal processing unit 50 provided in the adaptive array device, that is, a digital signal processor.
- a signal processing unit 50 provided in the adaptive array device, that is, a digital signal processor. This is achieved by executing a program.
- This program is stored in the PROM, EEPROM or RAM, upgraded by ROM exchange, downloaded to the EEPROM or RAM via a program recording medium, network or telephone line, and sent to a digital signal. Can be read by the processor.
- the mobile phone 200 does not include the correction control unit 239, the phase shifter 240, and the amplifier 241 but has the functions of the weight control unit 238 and the multiplier 2 It may be configured to be realized by 25.
- the light control unit 238 sends the weight vector W2 to the weight vector W2 by adding the correction value ⁇ 012 and Ampl2.
- the multiplier 225 may be configured to calculate the weight vector and weight the calculated weight vector in the multiplier 225. This is because the weight vector is a physical quantity equivalent to phase and amplitude in the first place. Further, in this case, either of the radio units A and B may be used as a reference. Further, since the functions realized by the DSP 260 are shown in the broken lines in FIG. 10, the configuration of the embodiment and the above configuration are substantially the same and can be easily realized. .
- Steps 8 7 and 8 8 in Fig. 8 and 1 8 7 and 1 8 8 in Fig. 14 respectively set the phase and amplitude to a fixed step size (the phase ranges from 180 degrees to 180 degrees).
- the received signal level is measured sequentially while changing the amplitude magnification from 0.50 to 2.00 in increments of 0.5 at a time. For example, measure at 90 degrees for the phase and 0.5 for the amplitude), find the phase amount and amplitude magnification at which the reception level is minimal, and then find the second phase that includes the found phase amount and amplitude magnification.
- the received signal level may be measured while changing in small steps (for example, 1 degree, 0.05) in the range of. As a result, the time for the calibration process can be reduced.
- the mobile phone 200 includes two wireless units, but may be configured to include three or more wireless units.
- the antenna mounting may be selectively combined from a rod antenna, a pattern antenna, and a chip antenna.
- the measuring device measures a correction value for each of the radio units other than the reference one radio unit with respect to the reference radio unit, and the mobile phone corrects each transmission signal other than the reference radio unit. What is necessary is just to comprise. In this case, any of the radio units can be used as a reference for the above-mentioned reason (8).
- correction values are measured in steps 182 to 192 for each of the reference radio section and the radio section to be measured, and thereafter, step 9 in Fig. 9 is performed. The validity of the measured correction value may be determined in the same manner as in 8, 9 and 9. .
- the configuration can be such that the calibration processing is performed by the portable telephone alone as in the wireless base station in the embodiment.
- a configuration may be adopted in which a calibration processing program is downloaded from an external device to the memory in the mobile phone via the external I-F 250, and is deleted after measurement. Further, the program may be left in a memory (stored in a ROM). When stored in the ROM, the calibration process can be performed by a user operation after shipment, and the aging of the wireless unit can be absorbed.
- control PC 330 controls the mobile phone 200, the transmission / reception device 301, and the transmission device 302 as the main body of the calibration process, but the control PC 330 controls the external I ZF 250 of the mobile phone 200.
- a program for performing the calibration process via the mobile phone may be downloaded to a memory inside the mobile phone 200 so that the mobile phone 200 becomes a main control unit.
- commands and data are input and output to and from the control PC 330 via the external IZF 250.However, commands, data, and programs are input and output via the wireless unit, and the DSP 260 interprets the commands. It may be configured to execute a program. In this case, the cost can be reduced because there is no need to provide the external IZF 250.
- the relative phase variation and the amplitude variation of the antenna in the adaptive array are used as correction values.
- it is suitable for adaptive array devices used for wireless base stations of mobile phones, array transmission, and array receiving radio equipment.
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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AU2001269515A AU2001269515A1 (en) | 2000-07-14 | 2001-07-12 | Calibration device, adaptive array device, calibration method, program recordingmedium and program |
EP01947998A EP1309104B1 (en) | 2000-07-14 | 2001-07-12 | Calibration device, adaptive array device, calibration method, program recording medium and program |
US10/332,326 US6765529B2 (en) | 2000-07-14 | 2001-07-12 | Calibration device, adaptive array device, calibration method, program recording medium and program |
CN018152368A CN1452818B (zh) | 2000-07-14 | 2001-07-12 | 校准装置、自适应天线阵装置、校准方法、程序记录媒体 |
KR1020037000486A KR100556171B1 (ko) | 2000-07-14 | 2001-07-12 | 캘리브레이션 장치, 어댑티브 어레이 장치, 캘리브레이션 방법 및 프로그램 기록 매체 |
JP2002513123A JP3877678B2 (ja) | 2000-07-14 | 2001-07-12 | キャリブレーション装置、アダプティブアレー装置、キャリブレーション方法、プログラム記録媒体及びプログラム |
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JP2000215101 | 2000-07-14 | ||
JP2000-215101 | 2000-07-14 |
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PCT/JP2001/006069 WO2002007343A1 (fr) | 2000-07-14 | 2001-07-12 | Dispositif d'etalonnage, dispositif adaptatif en reseau, procede d'etalonnage, support d'enregistrement de programme et programme |
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US (1) | US6765529B2 (ja) |
EP (1) | EP1309104B1 (ja) |
JP (1) | JP3877678B2 (ja) |
KR (1) | KR100556171B1 (ja) |
CN (1) | CN1452818B (ja) |
AU (1) | AU2001269515A1 (ja) |
WO (1) | WO2002007343A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100399730C (zh) * | 2003-12-03 | 2008-07-02 | 电子科技大学 | 一种阵列天线通道误差的盲估计方法 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4318389B2 (ja) * | 2000-04-03 | 2009-08-19 | 三洋電機株式会社 | アダプティブアレー装置、無線基地局、携帯電話機 |
US7069052B2 (en) * | 2002-11-04 | 2006-06-27 | Nokia Corporation | Data transmission method in base station of radio system, base station of radio system, and antenna array of base station |
JP4177761B2 (ja) * | 2003-11-12 | 2008-11-05 | 株式会社エヌ・ティ・ティ・ドコモ | ウエイト決定装置及びウエイト決定方法 |
US7630688B2 (en) * | 2004-03-31 | 2009-12-08 | Interdigital Technology Corporation | Mitigation of wireless transmit/receive unit (WTRU) to WTRU interference using multiple antennas or beams |
JP4524147B2 (ja) * | 2004-06-30 | 2010-08-11 | 京セラ株式会社 | 通信装置、キャリブレーション方法及びプログラム |
CN100495951C (zh) * | 2005-05-09 | 2009-06-03 | 上海原动力通信科技有限公司 | 一种动态选择阵列天线结构的方法 |
US8150469B2 (en) * | 2006-02-27 | 2012-04-03 | Kyocera Corporation | Adaptive array base station device and adaptive array base station device control method |
US8219035B2 (en) * | 2009-09-18 | 2012-07-10 | ReVerb Networks, Inc. | Enhanced calibration for multiple signal processing paths in a wireless network |
US8179314B2 (en) * | 2009-10-22 | 2012-05-15 | ReVerb Networks, Inc. | Enhanced calibration for multiple signal processing paths in a frequency division duplex system |
CN103716075B (zh) * | 2012-09-29 | 2016-12-21 | 华为技术有限公司 | 一种多个射频拉远单元间联合通道校正的方法和装置 |
CN103428137B (zh) * | 2013-07-23 | 2016-07-06 | 清华大学 | 一种无线高速短距离通信芯片 |
KR102375696B1 (ko) * | 2014-09-05 | 2022-03-17 | 한국전자통신연구원 | 빔 공간 mimo에서 기저대역 신호 변조 방법 및 장치 |
KR102375697B1 (ko) * | 2014-09-12 | 2022-03-17 | 한국전자통신연구원 | 빔 공간 mimo에서 기저대역 신호 변조 방법 및 장치 |
JP2018152723A (ja) * | 2017-03-13 | 2018-09-27 | 株式会社東芝 | 無線通信装置および無線通信方法 |
WO2020244783A1 (en) * | 2019-06-07 | 2020-12-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Calibration for antenna elements of a multi-antenna structure |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH118507A (ja) * | 1997-06-17 | 1999-01-12 | Sanyo Electric Co Ltd | アダプティブアレイ装置およびその補正方法 |
EP0954053A2 (en) * | 1998-04-28 | 1999-11-03 | Matsushita Electric Industrial Co., Ltd. | Array antenna radio communication apparatus |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5657023A (en) * | 1996-05-02 | 1997-08-12 | Hughes Electronics | Self-phase up of array antennas with non-uniform element mutual coupling and arbitrary lattice orientation |
SE508958C2 (sv) * | 1997-03-07 | 1998-11-16 | Ericsson Telefon Ab L M | Förfarande och anordning för kalibrering av en fasstyrd gruppantenn |
WO1998042093A1 (fr) * | 1997-03-18 | 1998-09-24 | Matsushita Electric Industrial Co., Ltd. | Dispositif d'etalonnage pour recepteur sans fil d'antenne reseau |
US5864317A (en) * | 1997-05-23 | 1999-01-26 | Raytheon Company | Simplified quadrant-partitioned array architecture and measure sequence to support mutual-coupling based calibration |
US6037898A (en) * | 1997-10-10 | 2000-03-14 | Arraycomm, Inc. | Method and apparatus for calibrating radio frequency base stations using antenna arrays |
JPH11220430A (ja) * | 1998-01-30 | 1999-08-10 | Matsushita Electric Ind Co Ltd | ダイバシチ通信装置及びダイバシチ受信方法 |
US20010016504A1 (en) * | 1998-04-03 | 2001-08-23 | Henrik Dam | Method and system for handling radio signals in a radio base station |
JP3326416B2 (ja) * | 1998-10-30 | 2002-09-24 | 三洋電機株式会社 | アダプティブアレー装置 |
US6400318B1 (en) * | 1999-04-30 | 2002-06-04 | Kabushiki Kaisha Toshiba | Adaptive array antenna |
US6486828B1 (en) * | 2000-07-26 | 2002-11-26 | Western Multiplex | Adaptive array antenna nulling |
-
2001
- 2001-07-12 CN CN018152368A patent/CN1452818B/zh not_active Expired - Lifetime
- 2001-07-12 KR KR1020037000486A patent/KR100556171B1/ko not_active IP Right Cessation
- 2001-07-12 EP EP01947998A patent/EP1309104B1/en not_active Expired - Lifetime
- 2001-07-12 US US10/332,326 patent/US6765529B2/en not_active Expired - Lifetime
- 2001-07-12 JP JP2002513123A patent/JP3877678B2/ja not_active Expired - Fee Related
- 2001-07-12 AU AU2001269515A patent/AU2001269515A1/en not_active Abandoned
- 2001-07-12 WO PCT/JP2001/006069 patent/WO2002007343A1/ja active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH118507A (ja) * | 1997-06-17 | 1999-01-12 | Sanyo Electric Co Ltd | アダプティブアレイ装置およびその補正方法 |
EP0954053A2 (en) * | 1998-04-28 | 1999-11-03 | Matsushita Electric Industrial Co., Ltd. | Array antenna radio communication apparatus |
Non-Patent Citations (1)
Title |
---|
See also references of EP1309104A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100399730C (zh) * | 2003-12-03 | 2008-07-02 | 电子科技大学 | 一种阵列天线通道误差的盲估计方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1452818A (zh) | 2003-10-29 |
KR100556171B1 (ko) | 2006-03-03 |
KR20030015388A (ko) | 2003-02-20 |
US6765529B2 (en) | 2004-07-20 |
JP3877678B2 (ja) | 2007-02-07 |
EP1309104B1 (en) | 2011-06-08 |
EP1309104A4 (en) | 2009-12-16 |
US20030176166A1 (en) | 2003-09-18 |
CN1452818B (zh) | 2012-12-05 |
EP1309104A1 (en) | 2003-05-07 |
AU2001269515A1 (en) | 2002-01-30 |
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