WO2001076102A1 - Station radio fixe et support d'enregistrement de programmes - Google Patents
Station radio fixe et support d'enregistrement de programmes Download PDFInfo
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- WO2001076102A1 WO2001076102A1 PCT/JP2001/002832 JP0102832W WO0176102A1 WO 2001076102 A1 WO2001076102 A1 WO 2001076102A1 JP 0102832 W JP0102832 W JP 0102832W WO 0176102 A1 WO0176102 A1 WO 0176102A1
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- WIPO (PCT)
- Prior art keywords
- mobile station
- signal
- base station
- received
- offset
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
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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
- H04B7/0848—Joint weighting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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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
- H04B7/0848—Joint weighting
- H04B7/0851—Joint weighting using training sequences or error signal
Definitions
- the present invention provides a wireless base station that wirelessly connects a plurality of mobile stations by spatial multiplexing using an array antenna, and a digital signal processor provided in the wireless base station. It relates to a program storage medium for storing a possible program. Background art
- Spatial multiplexing refers to the formation of different directivity patterns for multiple mobile stations using an adaptive array device, so that multiple mobile stations can operate at the same frequency and at the same time. This is a method of multiplexing the transmission and reception signals of the station for communication.
- the adaptive array device has a plurality of antennas, and adjusts the amplitude and phase of the transmission / reception signals of each antenna to thereby form a directional pattern as an entire antenna. To form an array (array antenna, turn).
- a wireless base station that wirelessly connects a plurality of mobile stations by spatial multiplexing is configured using an adaptive array device.
- This radio base station separates the received signals of individual mobile stations from the multiplexed received waves from multiple mobile stations.
- a weighting factor also called weight vector
- the vector calculation is performed by the DSP (Digital Signal Processor) as follows. It is done. The DSP adjusts the values of Wl (t-l) to W4 (t-1) to minimize the error e (t) in the following equation, and the adjusted Wl (t-1) to W4 Let (t-1) be the symbol weighting factors Wl (1;) to W4 (t) at time t.
- t is the symbol timing
- d (t) is the symbol data in the known reference signal (or training signal)
- XI (t) to X4 (t) is the received signal of each of the four antennas
- Wl (t-1) to W4 (1) can be any initial value of the weight coefficient for each antenna, The weighting factor for each antenna calculated in the previous time slot or the reception time slot is used.
- the reference signal includes a bit (or symbol data) of a known bit sequence (or symbol sequence) included in the control signal in the control channel or the communication signal in the communication channel.
- PR preamble
- UW unique word
- the radio base station calculates a weighting factor for each antenna for each mobile station to be subjected to spatial multiplexing, and performs multiplexing from multiple mobile stations.
- the received signal of the mobile station is separated by weighting the received wave for each antenna.
- a directivity pattern is formed by weighting using the weighting factor calculated at the time of reception.
- Spatial multiplexing is also called path division multiple access and is described in detail in “Path division multiple access (PDMA) mobile communication system” (IEICE Technical Report RCS93-84 (1994-01), PP37-44). It has been done.
- the above reference signal is transmitted to each mobile station connected wirelessly by spatial multiplexing. If the values are different from each other, it is easy to calculate the weighting factor and separate the signals.For example, in the PHS, since the fixed bit sequence such as PR and UW described above is common to each mobile station, In some cases, the coefficients cannot be calculated and cannot be separated. In other words, in the multiplexed reception waves from a plurality of mobile stations, the center frequency of the signal of each mobile station completely matches, and the timing of the symbol, which is the minimum unit of transmitted / received data, is also completely If they match, the correct weighting factor cannot be calculated, and the desired signal cannot be separated.
- each mobile station generates its own internal timing clock and carrier frequency signal, which can have errors of a few ppm, so the symbol timing It is rare that the pitches match completely and the center frequency of the carrier also completely matches.
- the wireless base station detects the deviation of the symbol timing and the deviation of the carrier frequency for each mobile station, and converts them into the received wave from each antenna. By reflecting the deviation, it is thought that the weight vector can be calculated appropriately.
- the control channel for the standby receiver and the communication channel for the call are used separately, and the call originates and departs.
- deviation of symbol timing, carrier frequency The shift is unknown.
- the radio base station only needs to detect them immediately after transitioning to the communication channel, but first separates the signal of the new mobile station using the correct weighting factor, and then starts to detect them. Therefore, it was not possible to use the deviation of symbol timing and the deviation of carrier frequency immediately after the transition, and it was not possible to calculate the weight coefficient with high accuracy.
- the present invention improves the accuracy of separating a signal from a new mobile station when starting radio connection with a new mobile station by forming an antenna directivity.
- the purpose is to provide a radio base station that ensures the establishment of a wireless base station. Disclosure of the invention
- a radio base station is a radio base station that wirelessly connects a plurality of mobile stations by spatial multiplexing using an array antenna.
- a detecting unit that detects a shift amount of a signal received from the mobile station, and when a new wireless connection is made by forming antenna directivity to the mobile station, the shift amount is used to detect the shift amount from the received signal.
- a separating unit that separates a signal from the mobile station.
- the radio base station of the present invention shifts a mobile station from a control channel to a communication channel, and performs multiple multiplexing by spatial multiplexing using an array antenna in the communication channel.
- a radio base station for wirelessly connecting a mobile station, a detection unit for detecting a deviation amount of a signal received from the mobile station via a control channel, and an antenna directivity for forming the antenna directivity.
- the communication A separating unit for separating the signal of the mobile station from the signal received via the channel.
- the separation unit uses the shift amount detected by the detection unit. Since it can be corrected, the accuracy of separating the signal of the mobile station concerned is improved compared to the case where the amount of deviation is unknown, and the communication channel can be reliably established. Is effective.
- the deviation amount is based on a periodic reception time slot in the radio base station, and the timing of a signal received from the mobile station in the reception time slot is used. At least one of a time offset indicating the mining and a frequency offset indicating a difference between the carrier frequency assigned to the mobile station and the frequency of the received signal. Further, the detection unit is configured to provide a timing indicating a evening reception of a signal received from the mobile station based on a periodic reception time slot in the radio base station. A first detector for detecting an im offset, and a second detector for detecting a frequency offset indicating a difference between a carrier frequency allocated to the mobile station and the frequency of the received signal. The separation unit includes a time offset and a frequency offset. Even if the received signal is corrected by the offset and the signal of the mobile station is separated from the corrected received signal.
- the separation unit can perform correction using the frequency offset and the time offset detected by the detection unit, so that the array antenna pattern can be corrected.
- the frequency and / or reception timing of the mobile station signal can be more accurately matched.
- the first and second detection units receive a reception request message for establishing a communication channel transmitted from a mobile station via a control channel.
- the time offset and the frequency offset are detected, and the separation unit transmits the message from the mobile station to the mobile station after the message.
- a configuration may be adopted in which the synchronization signal transmitted via the channel is corrected by the time offset and the frequency offset in the reception time slot. .
- this wireless base station when this wireless base station is used as the base station of the PHS. Telephone system, it is possible to more reliably establish a link channel.
- the detection unit may further receive an array in the reception time slot of the message, thereby obtaining a ⁇ : C vector for the mobile station.
- the separation unit further performs the separation using the weight vector as an initial value in a synchronization signal reception time slot. Such a configuration may be adopted.
- the separation unit can use the initial value of the weight vector, the accuracy of calculating the weight vector required for separation can be improved. This means that the weight vector value can be converged at an earlier time in the receive time slot.
- the program storage medium of the present invention is a program storage medium that can be read by a digital signal processing processor provided in a wireless base station forming an array antenna pattern. Then, a detection unit that detects a time offset and a frequency offset of a signal received from a mobile station via a control channel, and spatially multiplexes the mobile station. When a new wireless connection is made by the mobile station, the received signal is corrected by the detected time offset and frequency offset, and the mobile station of the relevant mobile station is corrected from the corrected received signal.
- a program for realizing a separation unit for separating a signal is stored. When the radio base station separation unit that executes the program stored in the program storage medium separates the mobile station signal from the received signal, correction is performed using the amount of deviation detected by the detection unit. Therefore, the accuracy of separating the signal of the mobile station is improved as compared with the case where the amount of deviation is unknown.
- FIG. 1 is a block diagram illustrating a configuration of a wireless base station according to the first embodiment.
- FIG. 2 is a block diagram showing a configuration of the signal processing unit 50.
- FIG. 3 is a block diagram showing the configuration of the user processing unit 51a.
- FIG. 4 is a diagram showing a link channel establishment sequence.
- FIG. 5 is a flowchart showing a process of moving a mobile station from a control channel (CCH) to a communication channel (TCH).
- CCH control channel
- TCH communication channel
- the radio base station uses a plurality of antennas to weight transmission / reception signals for each antenna, thereby improving directivity.
- a radio base station that forms a turn (hereinafter referred to as an array antenna pattern) and connects the mobile stations wirelessly, and is a bidirectional time division stipulated by the PHS standard. It is installed as a PHS base station that connects PHS telephones by the multiplex (TDMAZTDD: Time Division Multiple Access / Time Division Duplex) method.
- TDMAZTDD Time Division Multiple Access / Time Division Duplex
- This radio base station detects the amount of deviation (frequency offset, timing offset) in the signal received from the mobile station via CCH, and transmits the TCH to the mobile station. When a new wireless connection is made, the array is received using the shift amount.
- FIG. 1 is a block diagram illustrating a configuration of a wireless base station according to the first embodiment.
- the radio base station is composed of a baseband unit 70, a modem unit 60, a signal processing unit 50, a radio unit 11, 12, 131, 41, and antennas 10 to 40. And a control unit 80.
- the baseband unit 70 transmits a plurality of signals (baseband signals indicating voice or data) between a plurality of lines connected via a telephone switching network and the modem unit 60. ) Is performed for each signal to be spatially multiplexed by multiplexing and demultiplexing the signals to conform to the TD MA / TD D frame.
- the TD MAZT DD frame has a period of 5 ms, and four transmission time slots and four reception time slots formed by dividing into eight. It is composed of
- the baseband unit 70 transmits signals from a plurality of lines to the modem unit 60 from a plurality of lines by using a TD MAZT DD frame for time division multiplexing. Four multiplexes are performed every time, and a maximum of four signals are output from the modem section 60 C per one transmission time slot for spatial multiplexing.
- the base node unit 70 transmits a maximum of four signals per reception time slot from the modem unit 60 to a plurality of lines from the modem unit 60. Input, demultiplex the time division multiplex, and output to multiple lines.
- Modem section 60 modulates a signal input from baseband section 70 and demodulates a signal input from signal processing section 50.
- the modulation and demodulation method is ⁇ / 4 shift QPSK.
- the signal processing unit 50 calculates a weight vector for forming an array antenna pattern in the reception time slot, and calculates a time offset and a frequency offset. Detects the offset and weights the transmission signal using the weight vector calculated at the time of reception at the transmission time slot.
- the time offset is the timing of the signal received from the mobile station with reference to the periodic reception time slot at the radio base station.
- the frequency offset refers to the difference between the center frequency of the carrier assigned to the mobile station and the center frequency of the signal actually received from the mobile station.
- the signal processing unit 50 executes the timer processing. After detecting the frequency offset and the frequency offset, transmit the link channel assignment (carrier frequency number and slot number) as a response via CCH. When the first signal (synchronous burst) is received through the assigned TCH, the weight is detected using the detected time offset and frequency offset. Calculate the vector.
- the radio sections 11, 21, 31, 31 and 41 convert the signals weighted by the signal processing section 50 into RF signals at the time of array transmission, and the antennas 10 to 40 When receiving the array, the signal from the antennas 10 to 40 is converted into a signal in the baseband area and output to the signal processing section 50.
- the radio unit 11 operates in the same manner, and the radio units 21, 31, and 41 stop operating.
- the control unit 80 sends an array transmission (or array reception) and an omni transmission (or an omni reception) to the signal processing unit 50 for each time slot. Is specified. In other words, the control unit 80 instructs to perform array reception when receiving a control signal and omni transmission when transmitting a control signal, and to transmit and receive all communication signals on the TCH. Ray Instructs transmission and reception.
- the signal on the CCH may be received by either array reception or omni reception, but if the array is received, the calculated vector is transmitted to the TCH. It can be used when receiving signals.
- FIG. 4 is a diagram illustrating a process of shifting from CCH to TCH (referred to as a link channel establishment sequence). Since this sequence diagram complies with the PHS standard, a detailed description is omitted. In this case, the “link channel” which is finally received by the radio base station on the CCH during transition is described. Request for re-assignment (re-request) ”and“ synchronous burst ”received first on TCH.
- a link channel (hereinafter abbreviated as Lch) establishment request is transmitted from the mobile station to the radio base station, and is used for location registration, calling, receiving, handover, and channel.
- This message requests allocation of TCH and a link to make a transition to TCH, such as when switching a file.
- the Lch establishment re-request is transmitted from the mobile station to the radio base station due to a timeout or the like after the Lch establishment request, and is the same message as the Lch establishment request. You. Since these messages are the last messages received by the radio base station on the CCH when transitioning from the CCH to the TCH, the frequency offset is performed by the signal processing unit 50. And an offset are detected.
- the synchronization burst is a message transmitted from the mobile station to which the TCH has been assigned in order to synchronize with the radio base station through the assigned TCH.
- the mobile station transmits this synchronization burst continuously until the wireless base station responds (sends the synchronization burst). Since this synchronization burst is the first signal that the radio base station receives on the TCH, its frequency offset is not known until the time offset is actually received. These values are considered to be about the same as the frequency offset and time offset detected on the CCH from the same mobile station. Therefore, in receiving the synchronous burst, the radio base station uses the frequency offset and the time offset detected by the signal processing unit 50 on the CCH. Calculate the weight vector by correcting the received signal. This makes it possible to calculate the weight vector with high accuracy.
- FIG. 2 is a block diagram showing the configuration of the signal processing unit 50. This is a block diagram showing the functions realized by executing the program by the DSP.
- a signal processing section 50 is composed of a user processing section 51 a to 51 d, an adder 55 1 to 55 4, and a switch 56 1 for switching between transmission and reception.
- 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 calculates a weight coefficient by correcting the frequency offset and the time offset in the reception time slot, and uses the weight coefficient to calculate the weight coefficient.
- the user signals are extracted, and the transmission time is extracted.
- a user signal weighted using the weight coefficient calculated in the immediately preceding reception slot is output to each radio unit.
- Adder 55 1 combines the weighted components of each user transmission signal to radio section 11.
- Adders 55 2 to 55 3 are also adders Same as 551, except that they correspond to radio units 21 to 41, respectively.
- FIG. 3 is a block diagram showing the configuration of the user processing unit 51a.
- the user processing unit 5 la includes a ⁇ -unit calculation unit 53, an adder 54, a reference signal generation unit 55, a switch 56, a frequency estimation unit 57, and a timing estimation unit 5.
- Multipliers 52 1 to 52 4 and multipliers 58 1 to 58 4 are provided.
- the weight calculating section 53 receives the signal from each of the radio sections 11 to 41 in each symbol period in the fixed bit pattern period in the reception time slot.
- the weight coefficient is calculated so that the sum of errors between S1R to S4R and the reference signal generated by reference signal generating section 55 is minimized.
- the weight calculating section 53 outputs the frequency offset detected in the previous reception time slot by the frequency estimating section 57 and the timing estimating section 58.
- the frequency and timing of the received signal are corrected by the set and time offset, respectively, and the weight coefficient is calculated.
- the previous reception time slot used here is the reception time slot for the first reception time slot on the destination TCH and the reception time slot for the last signal received on the CCH. This refers to the time slot, and for subsequent reception time slots, the reception time slot immediately before the normal reception.
- the ⁇ ⁇ calculation unit 53 adjusts the values of Wl (tl) to W4 (t ⁇ 1) in the following equation so as to minimize the error e (t).
- Wl (t-1) to W4 (t-1) after adjustment be the symbol weighting factors Wl (t) to W4 (t) at time t.
- Wl (t-1) W4 (t-1) is a weighting factor for each antenna calculated for the previous symbol or a weighting factor calculated for the previous reception time slot.
- XI ′ (t) to X4 ′ (t) are received signals corrected by the weight calculation unit 53, and are represented by the following formulas when expressed in complex numbers. You.
- 1 (1;) to 4 (1 :) are the received signals of the antennas 10 to 40, and ⁇ t is the timing detected by the timing estimation unit 58.
- “Offset” indicates the frequency offset detected by the frequency estimating unit 57.
- At and W (t-1) in the above equation are received last through the CCH before the transition in the first reception time slot via the TCH at the time of transition to TCH. This is the value detected (calculated) in the reception time slot of the detected signal.
- 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, even if the error e (t) is large, At the end of the section of the reference signal, the error e (t) converges to a minimum (or converges to 0).
- the weight calculation unit 53 calculates the weight coefficient in the reception time slot in the symbol period in which the weight coefficient was calculated and in the symbol periods thereafter.
- the weight coefficient is output to multipliers 5 2 1 to 5 2 4.
- the ⁇ byte calculation unit 53 sets the transmission time slot in the transmission time slot.
- the weighting factor calculated by the immediately preceding reception time slot is output to multipliers 581 to 584.
- the reference signal generator 55 generates the symbol data according to the symbol timing in the reception section of the fixed bit notation (fixed symbol) known in the reception time slot. Output to weight calculator 53.
- the detection of the frequency offset is carried out, for example, by using “WHITE SERIES No.105 Digital Modulation and Demodulation Technology for Mobile Communication” (March 14, 2002, The method described on page 54 of Tri-Cubes, Inc. may be used.
- the timing estimating unit 58 detects the time offset of the received signal in the received time slot, that is, detects the time offset of the received signal from the start of the received time slot. Detects up to the start (for example, the start of SS (start symbol)) as a time offset.
- the time offset is detected using the timing at which the UW is received.
- UW is a symbol sequence defined for symbol-level synchronization in the PHS standard.
- the radio base station adds the TD MAZ TDD frame time (5 ms) to the timing at which the previous UW was received.
- a detection window for searching is provided, and it is determined from which timing in the detection window the UW head is received. This determination is made, for example, in units of 1-8 or 1Z16 symbol time.
- the symbol sequence separated by the vector, calculated by the weight calculation unit 53 is received at the top of the UW for the symbol sequence.
- the timing estimating unit 58 obtains the time offset by converting the reception timing at the top of the UW into the start timing at the top of the SS.
- the multipliers 52 1 to 52 4 and the adder 54 are used in the reception time slot to convert the reception signals X 1 to X 4 from the radio units 11 to 41 into the gate calculation unit 5. Weighting is performed using the weighting factor output from 3 and the combination is performed.
- the synthesis result means the reception symbol of user a extracted from the reception signals of up to four users a to d spatially multiplexed.
- the multipliers 581 to 5884 are provided in the transmission time slot to individually transmit the transmission symbols of the user a to the radio sections 11 to 41, respectively, and to calculate the ⁇ ⁇ 5 Weight using the weighting factor output from 3.
- FIG. 5 is a flowchart showing a process of moving a mobile station from CCH to TCH in a wireless base station. This figure shows the processing on the wireless base station side in the link channel establishment sequence shown in FIG.
- control unit 80 instructs the signal processing unit 50 to perform array reception in the CCH reception time slot, the control signal from the mobile station is transmitted to the signal processing unit 50.
- the calculation, weighting, and synthesis of the weighting factor by 0 are performed, and the array is always received (step 70).
- the frequency estimating unit 57 and the timing estimating unit 58 respectively Detect frequency offset and time offset (Steps 72 and 73).
- the control unit 80 Select an unused time-division channel or an unused spatial multiplexing TCH candidate in the MAZT DD frame (step 74).
- control unit 80 instructs the signal processing unit 50 to perform omni transmission or array transmission and transmit an Lch allocation rejection (step 7 7).
- control section 80 causes Lch assignment to be transmitted via CCH (step 76) and receives a synchronization burst (step 7). 8).
- the signal processing section 50 corrects the received signal based on the frequency offset and the time offset detected in steps 72 and 73, and further corrects the received signal.
- the ⁇ vector is calculated using the ⁇ vector calculated in step 70 as an initial value.
- the subsequent processing (step 79) is as shown in FIG.
- control section 80 similarly performs steps 72 to 79 described above.
- the radio base station uses the frequency offset and the time offset from the signal received through the immediately preceding CCH. Since the vector is used, it is possible to calculate the weight vector with high accuracy even immediately after the transition to TCH.
- the TCH to be assigned to the mobile station is selected, but the TCH to be assigned may be selected in advance.
- the radio base station may periodically perform TCH selection processing and transmit the Lch assignment immediately upon receiving the Lch assignment request. Then, the time offset fluctuation caused by the change of the propagation environment due to the movement of the mobile station, etc. Since the transition to TCH will be made in a short time, the weight vector can be calculated more accurately.
- the received signal of CCH is array-received, but may be omni-received.
- the initial value of the ⁇ vector can be set separately. Even in this case, since the time offset and frequency offset obtained from the CCH signal are used at the time of transition to TCH, the accuracy of weight vector calculation can be improved. Can be improved.
- the timing estimating unit 58 determines the time offset of the received signal by the time slot.
- the reception timing at the beginning of the SS may be detected from the rising timing and falling timing of the reception electric field strength in the inside.
- the time offset is set as the reception timing at the beginning of the SS based on the start of the reception time slot, but the reception offset at the beginning of the UW is used.
- the reception timing of the mining or other specific symbols may be used.
- the start of the reception time slot is used as a reference, the reference may be based on the time when a fixed symbol time has elapsed from the start of the reception time slot.
- the number of antennas and the number of radio units are four, but different numbers may be used.
- the control The present invention can be applied to any communication system that starts communication by shifting from a channel to a communication channel.
- the present invention is applied to the wireless base station.
- the main part of Ming is realized by the signal processing unit 50 provided in the adaptive array device, that is, the digital signal processor executing the program.
- This program is stored in PROM, EEPROM, or RAM, is upgraded by ROM exchange, and is stored in EEPROM via a program storage medium, a network, or a telephone line. And download to RAM.
- the present invention relates to a radio base station that wirelessly connects a plurality of mobile stations by spatial multiplexing using an array antenna, and detects a shift amount of a signal received from the mobile station.
- the mobile station is newly connected wirelessly by forming an antenna directivity, the mobile station is configured to separate the signal of the mobile station from the received signal using the detected shift amount. It is suitable as a base station for mobile communication systems.
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020027013187A KR20020086750A (ko) | 2000-04-03 | 2001-03-30 | 무선 기지국, 프로그램 기억 매체 |
AU2001244690A AU2001244690B2 (en) | 2000-04-03 | 2001-03-30 | Radio base station and program recorded medium |
DE60131264T DE60131264T2 (de) | 2000-04-03 | 2001-03-30 | Funkbasisstation und programmaufzeichnungsmedium |
AU4469001A AU4469001A (en) | 2000-04-03 | 2001-03-30 | Radio base station and program recorded medium |
US10/240,530 US7155162B2 (en) | 2000-04-03 | 2001-03-30 | Radio base station and program recorded medium |
EP01917762A EP1274182B1 (en) | 2000-04-03 | 2001-03-30 | Radio base station and program recorded medium |
Applications Claiming Priority (2)
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JP2000101498A JP2001285189A (ja) | 2000-04-03 | 2000-04-03 | 無線基地局、プログラム記憶媒体 |
JP2000-101498 | 2000-04-03 |
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WO2001076102A1 true WO2001076102A1 (fr) | 2001-10-11 |
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PCT/JP2001/002832 WO2001076102A1 (fr) | 2000-04-03 | 2001-03-30 | Station radio fixe et support d'enregistrement de programmes |
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US (1) | US7155162B2 (ja) |
EP (1) | EP1274182B1 (ja) |
JP (1) | JP2001285189A (ja) |
KR (1) | KR20020086750A (ja) |
CN (2) | CN1225848C (ja) |
AU (2) | AU4469001A (ja) |
DE (1) | DE60131264T2 (ja) |
HK (1) | HK1070200A1 (ja) |
WO (1) | WO2001076102A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100544237C (zh) * | 2002-08-01 | 2009-09-23 | 松下电器产业株式会社 | 无线基站设备 |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030083250A1 (en) * | 2001-10-25 | 2003-05-01 | Francis Farrell | Anti-tumor chemotherapy by administration of cyclophosphamide and erythropoeitin |
US7181242B2 (en) | 2001-10-29 | 2007-02-20 | Ericsson Inc. | Systems and methods for communicating data at radio base station nodes |
US7061884B2 (en) * | 2001-10-29 | 2006-06-13 | Ericsson Inc. | Methods and systems for communicating data at radio base station nodes that provide efficient allocation of control timeslots |
WO2003090441A2 (en) * | 2002-04-19 | 2003-10-30 | Thomson Licensing S.A. | Channel aquisition processing for a television receiver |
JP3973543B2 (ja) | 2002-11-20 | 2007-09-12 | 三洋電機株式会社 | 受信方法と装置 |
US7542733B1 (en) * | 2003-02-04 | 2009-06-02 | Sprint Spectrum L.P. | Method and apparatus for diversity transmission from a mobile station |
US7814188B2 (en) * | 2003-12-16 | 2010-10-12 | Honeywell International Inc. | Synchronized wireless communications system |
GB0403762D0 (en) * | 2004-02-20 | 2004-03-24 | Qinetiq Ltd | Frequency compensated communications reception |
JP4728597B2 (ja) * | 2004-06-09 | 2011-07-20 | 日本無線株式会社 | アレイアンテナ通信装置 |
US8027318B2 (en) * | 2004-06-30 | 2011-09-27 | Vt Idirect, Inc. | Method, apparatus and system for rapid acquisition of remote nodes in a communication system |
US7330524B2 (en) * | 2004-12-30 | 2008-02-12 | Atheros Communications, Inc. | Joint synchronization and impairments estimation using known data patterns |
JP4774823B2 (ja) * | 2005-06-16 | 2011-09-14 | ソニー株式会社 | 無線通信システム、無線通信設定方法、無線通信装置、無線通信設定プログラム及び無線通信設定プログラム格納媒体 |
US7912017B2 (en) * | 2005-06-29 | 2011-03-22 | Sony Corporation | Wireless connection system and wireless connection method |
US9130993B2 (en) * | 2006-02-09 | 2015-09-08 | Sony Corporation | Wireless connection system and wireless connection method |
EP2073415A4 (en) * | 2006-09-28 | 2011-02-09 | Kyocera Corp | COMMUNICATION CONTROL METHOD FOR TDD / OFDMA COMMUNICATION FORMAT, BASE STATION, TERMINAL AND COMMUNICATION CONTROL SYSTEM |
JP4775222B2 (ja) * | 2006-10-03 | 2011-09-21 | ブラザー工業株式会社 | 逓倍パルス生成装置、逓倍パルス生成方法、画像形成装置、及び画像読取装置 |
KR100969774B1 (ko) * | 2007-01-30 | 2010-07-13 | 삼성전자주식회사 | 통신 시스템에서 신호 수신 장치 및 방법 |
US20170250927A1 (en) * | 2013-12-23 | 2017-08-31 | Dali Systems Co. Ltd. | Virtual radio access network using software-defined network of remotes and digital multiplexing switches |
DE102020100056A1 (de) | 2019-03-06 | 2020-09-10 | Samsung Electronics Co., Ltd. | Drahtlose Kommunikationsvorrichtung zur Korrektur eines Offsets zwischen einer Basisstation und der drahtlosen Kommunikationsvorrichtung und ein Verfahren zum Betreiben derselben |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998017071A1 (en) * | 1996-10-11 | 1998-04-23 | Arraycomm, Inc. | Method and apparatus for estimating parameters of a communication system using antenna arrays and spatial processing |
WO1998017037A1 (en) * | 1996-10-11 | 1998-04-23 | Arraycomm, Inc. | Method and apparatus for decision directed demodulation using antenna arrays and spatial processing |
JPH10190540A (ja) * | 1996-11-25 | 1998-07-21 | Lucent Technol Inc | ディジタル無線受信機の性能改善装置及びその方法 |
JPH11112397A (ja) * | 1997-10-07 | 1999-04-23 | Sanyo Electric Co Ltd | アダプティブアレイ装置 |
JP2000091844A (ja) * | 1998-09-08 | 2000-03-31 | Nec Corp | 多重無線通信装置 |
JP2000324031A (ja) * | 1999-05-11 | 2000-11-24 | Matsushita Electric Ind Co Ltd | アンテナ制御装置 |
JP2001007754A (ja) * | 1999-06-22 | 2001-01-12 | Toshiba Corp | 無線通信システム及び無線基地局 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9300681D0 (sv) * | 1993-03-01 | 1993-03-01 | Ericsson Telefon Ab L M | A method and an apparatusfor handing off a mobile station from a first to a second channel in a mobile communication system |
AU4072193A (en) * | 1993-05-27 | 1994-12-20 | Nokia Telecommunications Oy | Base station for a tdma cellular radio network |
EP0846378B1 (fr) * | 1995-08-22 | 1999-10-06 | Thomson-Csf | Procede et dispositif de multiplexage/demultiplexage spatial de signaux radioelectriques pour systeme radio mobile sdma |
DE69705356T2 (de) * | 1996-05-17 | 2002-05-02 | Motorola Ltd | Verfahren und Vorrichtung zur Gewichtung eines Uebertragungsweges |
US6275543B1 (en) * | 1996-10-11 | 2001-08-14 | Arraycomm, Inc. | Method for reference signal generation in the presence of frequency offsets in a communications station with spatial processing |
JP3816162B2 (ja) * | 1996-10-18 | 2006-08-30 | 株式会社東芝 | アダプティブアンテナにおけるビーム幅制御方法 |
JP3381580B2 (ja) * | 1996-11-22 | 2003-03-04 | 株式会社豊田中央研究所 | アダプティブ通信装置 |
US6122260A (en) * | 1996-12-16 | 2000-09-19 | Civil Telecommunications, Inc. | Smart antenna CDMA wireless communication system |
US6128276A (en) * | 1997-02-24 | 2000-10-03 | Radix Wireless, Inc. | Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays |
US6359923B1 (en) * | 1997-12-18 | 2002-03-19 | At&T Wireless Services, Inc. | Highly bandwidth efficient communications |
JPH1146113A (ja) | 1997-05-30 | 1999-02-16 | Matsushita Electric Ind Co Ltd | アレーアンテナ受信装置及び受信信号の位相回転量補正方法 |
JP3692728B2 (ja) | 1997-10-02 | 2005-09-07 | 松下電器産業株式会社 | 衛星通信システム |
JP3694396B2 (ja) | 1997-10-20 | 2005-09-14 | 松下電器産業株式会社 | 無線通信装置及び無線通信方法 |
US6154661A (en) * | 1997-12-10 | 2000-11-28 | Arraycomm, Inc. | Transmitting on the downlink using one or more weight vectors determined to achieve a desired radiation pattern |
JP3587985B2 (ja) | 1998-02-19 | 2004-11-10 | 三菱電機株式会社 | アダプティブアンテナ |
US6615024B1 (en) * | 1998-05-01 | 2003-09-02 | Arraycomm, Inc. | Method and apparatus for determining signatures for calibrating a communication station having an antenna array |
US20020150070A1 (en) * | 1999-07-02 | 2002-10-17 | Shattil Steve J. | Method and apparatus for using frequency diversity to separate wireless communication signals |
US6067290A (en) * | 1999-07-30 | 2000-05-23 | Gigabit Wireless, Inc. | Spatial multiplexing in a cellular network |
-
2000
- 2000-04-03 JP JP2000101498A patent/JP2001285189A/ja active Pending
-
2001
- 2001-03-30 DE DE60131264T patent/DE60131264T2/de not_active Expired - Fee Related
- 2001-03-30 KR KR1020027013187A patent/KR20020086750A/ko not_active Application Discontinuation
- 2001-03-30 CN CNB018105912A patent/CN1225848C/zh not_active Expired - Fee Related
- 2001-03-30 AU AU4469001A patent/AU4469001A/xx active Pending
- 2001-03-30 US US10/240,530 patent/US7155162B2/en not_active Expired - Fee Related
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- 2001-03-30 WO PCT/JP2001/002832 patent/WO2001076102A1/ja active IP Right Grant
- 2001-03-30 AU AU2001244690A patent/AU2001244690B2/en not_active Ceased
-
2005
- 2005-04-04 HK HK05102807A patent/HK1070200A1/xx not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998017071A1 (en) * | 1996-10-11 | 1998-04-23 | Arraycomm, Inc. | Method and apparatus for estimating parameters of a communication system using antenna arrays and spatial processing |
WO1998017037A1 (en) * | 1996-10-11 | 1998-04-23 | Arraycomm, Inc. | Method and apparatus for decision directed demodulation using antenna arrays and spatial processing |
JPH10190540A (ja) * | 1996-11-25 | 1998-07-21 | Lucent Technol Inc | ディジタル無線受信機の性能改善装置及びその方法 |
JPH11112397A (ja) * | 1997-10-07 | 1999-04-23 | Sanyo Electric Co Ltd | アダプティブアレイ装置 |
JP2000091844A (ja) * | 1998-09-08 | 2000-03-31 | Nec Corp | 多重無線通信装置 |
JP2000324031A (ja) * | 1999-05-11 | 2000-11-24 | Matsushita Electric Ind Co Ltd | アンテナ制御装置 |
JP2001007754A (ja) * | 1999-06-22 | 2001-01-12 | Toshiba Corp | 無線通信システム及び無線基地局 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1274182A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100544237C (zh) * | 2002-08-01 | 2009-09-23 | 松下电器产业株式会社 | 无线基站设备 |
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US20030139152A1 (en) | 2003-07-24 |
CN1551531A (zh) | 2004-12-01 |
AU4469001A (en) | 2001-10-15 |
EP1274182A1 (en) | 2003-01-08 |
EP1274182B1 (en) | 2007-11-07 |
AU2001244690B2 (en) | 2004-09-30 |
CN100385827C (zh) | 2008-04-30 |
US7155162B2 (en) | 2006-12-26 |
HK1070200A1 (en) | 2005-06-10 |
CN1225848C (zh) | 2005-11-02 |
KR20020086750A (ko) | 2002-11-18 |
DE60131264T2 (de) | 2008-09-04 |
DE60131264D1 (de) | 2007-12-20 |
EP1274182A4 (en) | 2004-07-14 |
JP2001285189A (ja) | 2001-10-12 |
CN1432226A (zh) | 2003-07-23 |
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