WO2006015663A1 - Reglergestütztes verfahren und reglergestützte vorrichtung zur bestimmung der kennlinie eines kompensationsgliedes in einem pegelregelkreis - Google Patents
Reglergestütztes verfahren und reglergestützte vorrichtung zur bestimmung der kennlinie eines kompensationsgliedes in einem pegelregelkreis Download PDFInfo
- Publication number
- WO2006015663A1 WO2006015663A1 PCT/EP2005/007001 EP2005007001W WO2006015663A1 WO 2006015663 A1 WO2006015663 A1 WO 2006015663A1 EP 2005007001 W EP2005007001 W EP 2005007001W WO 2006015663 A1 WO2006015663 A1 WO 2006015663A1
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- Prior art keywords
- signal
- characteristic
- compensation
- determining
- compensation element
- Prior art date
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
Definitions
- the invention relates to a controller-based method and a controller-based device for determining the characteristic of a compensation element in a level control loop.
- automatic gain control AGC
- EP 0 451 277 B1 discloses such an automatic level control loop in a receiver input stage.
- the amplification or attenuation factor of a gain or attenuation element integrated in the signal channel is automatically adjusted via a control signal which is generated in a control unit on the basis of the control difference between the level reference value and the signal level detected at the output of the signal channel via a detection unit of the high-frequency signal is generated.
- Nonlinearities in the signal channel lead to instabilities in the level control loop, worsening the dynamics of the level loop.
- the invention is therefore based on the object of significantly reducing the setting or calibration effort in determining the transmission characteristic curves of a compensation or damping element within a level control loop.
- the object is achieved by a regulator-based method for determining the characteristic of a compensation element according to claim 1 and a regulator-based device for determining the characteristic of a compensation element according to claim 7.
- Advantageous embodiments of the invention are specified in the dependent claims.
- the property of the level control circuit is utilized in that a value is set in the regulated level control circuit with a bridged compensation element and at a signal level of the level reference signal in the magnitude of the abscissa value of the characteristic curve of the compensation element which corresponds to the associated ordinate value of the characteristic curve of the compensation element with ideal compensation of the transfer characteristic in the signal channel.
- the temperature dependence of the transfer characteristic of the signal channel which is only connected to a vertical Ver ⁇ shift of the transfer characteristic is determined quite analogously by the control signal change of the level control circuit at a certain ambient temperature in relation to a reference ambient temperature at a fixed frequency of the high frequency signal and fixed signal level of the level reference signal measured becomes. In this way, by varying the ambient temperature in relation to a reference ambient temperature the respective
- Adjusting the control signal or the change of the respective level-actual value of the high-frequency signal for use as a compensation signal in a unit for temperature compensation can be determined.
- the corresponding temperature-dependent control signal changes - in the case of the linear dependence - and the temperature-dependent changes in the level-actual value of the high-frequency signal in the case of the logarithmic dependence - to measure.
- the compensation values thus determined are to be stored in a first unit for temperature compensation for additive superposition with the level reference signal.
- the correspondingly determined compensation values m of a third unit for temperature compensation for additive superimposition must be stored with the control signal.
- compensation values for compensation of temperature-dependent changes of the amplification factor of the measuring amplifier are to be stored in a second unit for temperature compensation for additive superposition with the actuating signal.
- Fig. 1 is a block diagram of the inventive controller-based device for determination the characteristic of a compensation element in a level control circuit
- FIG. 2 shows a block diagram of the compensation element in the controller-based device according to the invention for determining the characteristic curve of a compensation element in a level-control loop
- FIG. 3 shows a partial section of the characteristic curve of the compensation element in the controller-based device according to the invention for determining the characteristic curve of a compensation element in a level-control loop;
- FIG. 4 shows a flowchart of the regulator-based method according to the invention for determining the characteristic curve of a compensation element in a level-control loop
- FIG. 6 shows a flow chart for the determination of the compensation values for temperature-dependent displacement of the actuator transmission characteristic in the signal channel
- FIG. 7 shows a flow chart for the determination of the compensation values in the case of a temperature-induced change in the amplification factor of the measuring amplifier in the level control circuit.
- the inventive device for determining the characteristic of a compensation element in a Pegelregel ⁇ circle is used in FIG. 1 in a signal generator.
- the inventive Device but also in other high-frequency equipment and systems, such as in transmitter power amplifiers or receiver input stages, are used, in which the level of a high-frequency signal is automatically adjusted with a level control loop.
- the level control circuit 1 consists of a signal channel 2 in which a high-frequency signal generated by a signal source 3 is guided and subjected to various message processing functions.
- the frequency f sig of Hoch ⁇ frequency signal S HF is set.
- the signal level of the high-frequency signal S HF is set in an actuator 4 of the signal channel 2 adjoining the signal source 3.
- the actuator 4 is for this purpose by one of the level adjustment of the high-frequency signal S HF proportional len, compensated control signal P SCe ii komp ' driven.
- the adjusted in terms of its signal level in the actuator 4 high frequency signal S HF is then fed via a calibration line 5 with defined impedance values to a buffer amplifier 6.
- a buffer amplifier 6 In the isolation amplifier 6 via two amplifier stages 7 and 8, a galvanic decoupling between the signal source 3 of the signal generator and the input / output stage 9 of the signal channel 2 of the signal generator.
- the isolation amplifier 6 additionally contains between the two amplifier stages 7 and 8, a low-pass filter 10 for damping coupled higher-frequency interference signals.
- a detection device 11 is connected, which is designed in the case of the signal generator of FIG. 1 as a directional coupler. In the directional coupler 11, the metrological detection and decoupling of the high-frequency signal S HF takes place at the end of the signal channel 2.
- the decoupled high-frequency signal S HF is down-mixed in the subsequent down mixer 12 by means of the mixer signal LO 1 in the intermediate frequency signal S 2F .
- the subsequent measuring amplifier 13, which has a controllable Amplification factor, performs a level adjustment of the intermediate frequency signal S ZF to the prevailing level level of the digital signal processing area 14 of the level loop 1 by.
- the subsequent anti-aliasing low-pass filter 15 performs suppression of the generation of higher-harmonic spectral components caused by the subsequent analog-to-digital conversion.
- the analog-to-digital conversion in the analog-digital converter 16 leads to the digitized intermediate frequency signal S ZFD , which is transferred in the subsequent down-converter 17 by means of the mixer signal LO 2 in the corresponding digitized baseband signal S NFD .
- the digitized baseband signal S NFD is logarithmized in the logarithmizer 18 to form the logarithmic level actual value P lsc in order to be present on the same scale as the logarithmic level reference signal P Ref for a meaningful control difference formation in the subsequent control difference formation unit 19.
- the logarithmic level reference signal P Ref a compensating signal KOmP 1 is additively superimposed before the control difference forming unit in a summation element 20.
- This compensation signal KOtTIp 1 is generated in a first temperature compensation unit 21.
- the compensation signal KOmP 1 is used to compensate for temperature-induced logarithmic shifts of the transmission characteristic of the signal channel 2, which occur mainly in Trennver ⁇ stronger 6.
- the control difference signal .DELTA.P from the control-difference unit 19 is supplied to the digitally implemented controller 22, which has, for example, a proportional-integrating control dynamic implemented as a digital filter.
- the control signal P stell generated by the controller 22 is subjected to a control signal limit in a signal limiter 23.
- an additional additive display is performed a pilot signal P Vorsc for the limited control signal P of the SCell Regulator 22.
- This pilot signal P Vorst i st not necessarily required, but accelerates the transient of the level control loop 1 clearly.
- the pilot signal P V ⁇ rst ' is the determined as a function of the signal value of the level reference signal P Re £ is switched directly without any feedback to the actuator 4 and leads to a level adjustment of the RF signal S RF in the vicinity of the set signal level of the Pegelreferensignals P Re £.
- the pre-control signal P Vorst therefore possesses the transient dynamic of the pre-control branch of the level-control loop 1 which is reduced compared to a closed control loop.
- the controller 22 only controls the remaining control difference ⁇ P between the set signal level of the level reference signal P Ref and that of the pilot signal
- S HF which are caused for example by superimposed interference signals or by parameter fluctuations in the functional units of the pilot control branch of the level control loop 1.
- This compensation signal Komp 2 is generated in a second temperature compensation unit 26.
- the temperature compensation signal Komp 2 is used to compensate for temperature-induced changes in the amplification factor of the measuring amplifier 13.
- the non-linear characteristic exactly at ideal compensation inverse of the nonlinear transfer characteristic of the signal channel 2 is composed of the pilot signal P amplituden ⁇ Vorsc limited control signal P will alternate the regulator 22 and Kompensa ⁇ tion signal Comp 2 formed uncompensated summation control signal P Ste i lunkomp at the input of the compensation element 27 non-linearly distorted, resulting in a non-linearly distorted, compensated by the compensation element 27 summation control signal P ste ii komp at the output of the compensation element 27 leads.
- the transfer characteristic of the signal channel 2 is dependent on the frequency f ECR of the RF signal S RF, also includes the compensation member 27 corresponding inverse f of the respective F.requenz Sig-dependent non-linear characteristics.
- the selection of the correct characteristic curve dependent on the frequency f Sig of the high-frequency signal S HF in the compensation element 27 takes place via the frequency signal f Sig of the high-frequency signal S HF applied to an input of the compensation element 27.
- the compensated summation control signal P steUko , np at the output of the compensation member 27 is locked in the phase of determining the characteristic of the compensation element 27 when the following switch 28 is open for the further control of the actuator 4 and in the phase of normal level control operation with the subsequent switch 28 closed continued for the further control of the actuator 4.
- the compensated summation control signal P ste ii komp is converted from digital format of the digital signal processing area 14 of the level control loop 1 in the analog format.
- the control signal P ste n generated by the controller 22 is continued in the phase of determining the characteristic of the compensation member 27 when the following switch 31 is closed for the further control of the actuator 4 and in the phase of the normal level control operation with the following switch 31 open for the further Control of the actuator 4 locked.
- the closed via the switch 31 in the phase of determining the characteristic of the compensation element 27 continued control signal P stell of the controller 22 is the digital-to-analog converter 32 from the digital format of the digital signal processing area 14 of the level control loop 1 in converted the analog format.
- the summation element 30 switches either the compensated summation control signal P ste ii kOmp of the compensation element 27 or the control signal P stell of the controller 22 for actuating the actuator 4.
- a multiplexer and a subsequent digital-to-analogue converter may also be used, the multiplexer depending on the Bet ⁇ ebs- phase either the compensated summation control signal P & te ii komp of the compensation element 27 or the control signal P stell of the controller 22 continues to control the actuator 4.
- an additional superposition of an additional compensation signal Komp 3 to the compensated summation control signal P Ste ii kom takes place in the phase of the normal level control operation.
- This additional compensation signal Komp 3 is generated in a third temperature compensation unit 34 - tion signal Komp 3 serves to compensate for temperature-induced linear displacements of Ubertragungs- kennlime the signal channel 2, which occur mainly in the actuator 4.
- the output of the summing element 34 thus is the order the compensation signal Comp added 3-compensated summation control signal P ste ii komp to> it as completely level-compensated summation Stell ⁇ signal P ste ii komp 'au f, the control signal 4 for adjusting the signal level of the Radio frequency signal S HF is guided
- a memory (RAM) 35 in the individual memory cells belonging to the respective abscissa values of the non-linear characteristic Ordmatenhong are stored.
- the coarse-grained abscissa values of the non-linear characteristic correspond to the most significant bits of the digitized uncompensated control signal high bits (P stellunkomp ).
- the frequency signal f Sig of the signal source 3 is used.
- the corresponding coarse ordinate value p s te ii lies in the vicinity of the non-linear characteristic.
- an additional fine ordinate value Ps te ii komptem is generated in an interpolator 36.
- This fine ordinate value of the nonlinear characteristic curve corresponds to the correction value or increment value to the coarse ordinate value with a finer screening of the abscissa values of the nonlinear characteristic curve.
- the finer screening of the respective abscissa values of the non-linear characteristic is obtained from the low-order bits of the digitized uncompensated control signal lowBits (P stellunkomp ).
- the determination is made of the fine ordinate value Ps teiikompfe i n by linear interpolation from the signal present at the output of memory 35 coarse ordinate value Ps te ii kompgrob! and its adjacent ordinate PStellkompgrobl + 1 of the non-linear characteristic, the coarse abscissa value grid highBits (P stellunkompi + 1 ) -high bits (P SCellunkompi ) and the fine abscissa value from the low-order bits of the digitized uncompensated control signal lowBits (P Ste ii uncomp ) according to equation (1) and the nomenclature in FIG. Third
- step S10 the frequency f sig of the high-frequency signal S HF is set at the signal source 3.
- the signal level of the level reference signal P Ref is set at the level control loop 1 in accordance with the abscissa value of the respective characteristic value pair of the characteristic curve of the compensation element 27.
- the switch 31 is closed while the switch 28 is opened.
- the . Temperature compensation unit 34 is inactive at the current time, so that after switching on the controller 22 of the level control circuit 1 and waiting for the transient of the level control circuit 1 at the control input of the actuator 4, the generated by the controller 22 and analog converted control signal P stell stationary.
- the value of the stationary setting control signal P stell of the controller 22 can be read in digital format before the digital input of the digital-to-analog converter 32 at connection point 38 in step S30 as the ordinate value of the characteristic of the compensation element 27 and in the associated Abszissenwert - Corresponds to the set signal level of the Pegelre ⁇ reference signal P Ref - addressed memory cell of the memory module 35 of the compensation element 27 as a coarse ordinate P ste ii kompgroM be written.
- the method steps S10, S20 and S30 are repeated in the following to determine all characteristic curves. Value pairs of the characteristic of the compensation element 27 performed.
- the compensation values Compl ⁇ of the first compensation signal KoTTIp 1 in step S40 for the Temperatur ⁇ compensation in the first temperature compensation unit 21, which the logarithmic temperature-induced shift of the non-linear transfer characteristic of the signal channel 2 - caused in particular by the isolation amplifier 6 - compensate.
- the method step S40 for determining the compensation values KOmP 11 of the first compensation signal KOmP 1 is decomposed into the sub-method steps S41 to S44 according to FIG. 5.
- the frequency f Sig of the high-frequency signal S HF is set at the signal source 3, and a specific signal level of the level reference signal P Ref is preset at the level reference input of the level-control loop 1.
- the actuator 4 is bridged in sub-step S42. Since the temperature-induced shift of the transfer characteristic of the signal channel 2 takes place on a logarithmic scale, a corresponding temperature compensation must also be carried out on a logarithmic scale and therefore realized in the region of the logarithmic scale control difference of the level control loop 1. For this reason, the level control circuit 1 in the range of the actual level input of the control difference formation unit 19 is opened.
- the ambient temperature T 1 is varied, and at the same signal level of the level reference signal P Ref, the actual temperature value P actual T1 relative to the ambient temperature T 1 is measured.
- the actual level change ⁇ P actual Pi st ⁇ i " p i st ⁇ o resulting from the temperature change between the ambient temperature T 1 and the reference ambient temperature T 0 is calculated from the previously measured actual level values P IstT1 and P IstT0 and as the compensation value Komp 1 : L of the first compensation signal KOmP 1 stored at temperature change from the reference ambient temperature T 0 to the ambient temperature T 1 in the first temperature compensation unit 21.
- the sub-process steps S43 and S44 are carried out in a specific temperature grid for other ambient temperature values T 1 analogously to the determination of corresponding compensation values KOiTIp 11 of the first compensation signal KOmP 1 .
- the determination of the compensation values Komp 3l of the third compensation signal Komp 3 for the compensation of the temperature-induced shift of the transfer characteristic of the signal channel 2 in the linear scale, which in particular by the temperature-induced shift of the pinch-off voltage of the GaAs field effect transistors in the actuator 4 is caused.
- the determination of the compensation values Komp 3l of the third compensation signal Komp 3 of the main process step S50 is decomposed into the sub-process steps S51 to S54 as shown in FIG. It takes place analogously to the determination of the characteristic-value pairs of the compensation element 27 in the method steps S10 to S30.
- the frequency f Sig of the high-frequency signal S HF is set analogously to the signal step 3 for a signal source 3 and a specific signal level for the level reference signal P Ref is applied to the level reference input of the level control loop 1.
- the isolation amplifier 6 In order to avoid additional temperature-induced shifts of the nonlinear transmission characteristic of the signal channel 2 on a logarithmic scale, caused by the isolation amplifier 6, in determining the compensation values Komp 3l of the third compensation signal Komp 3 , the isolation amplifier 6 is bypassed in the sub-process steps S52.
- the resulting control signal value P stellkompT0 at the input of the actuator 4 in the sub- process steps S52 is determined.
- the ambient temperature T 1 is varied and the newly set control signal value P ste ii kompTl is measured at the new ambient temperature T 1 due to the temperature-rise-dependent shift of the nonlinear transfer characteristic of the signal channel 2.
- the compensation values Komp 2l of the second compensation signal Komp 2 for the temperature compensation of the temperature-induced change in the transmission behavior, in particular the amplification factor, of the measuring amplifier 13 are determined.
- the main method step ⁇ 60 according to FIG. 7 is decomposed into the sub-method steps S61 to S64.
- the sub-process steps S61 to S64 for the determination of the compensation values Komp 2l of the second compensation signal Komp 2 for temperature compensation of the temperature-induced change in the transmission behavior of the measuring amplifier 13 correspond to the sub-process steps S51 to S54 for the determination of the compensation values Komp 3i of the third compensation signal Komp 3 for temperature compensation of the temperature-induced shift of the transfer characteristic of the signal channel 2 in a linear scale.
- the two main process steps S50 and S60 will be discussed below.
- the actuator 4 and the isolation amplifier 6 are bypassed in sub-step S62.
- the characteristic of the compensation element 27 is the control signal change ⁇ P stellkompi and thus the compensation values Komp 2i of the second compensation signal Komp 2 is not influenced due to the difference formation, so that either switch 28 or switch 31 can be closed when determining the adjusting control signals p ste ii komP ⁇ i to the ambient temperature T 1 .
- the compensation values Komp 2i of the second compensation signal Komp 2 for temperature compensation of the temperature-related change in the transmission behavior of the measuring amplifier 13 are stored in the second temperature compensation unit 26.
- the invention is not limited to the illustrated embodiment.
- other control and control structures can be used to form the level control loop 1 as well as for carrying out the control-based method and the controller-based method.
- For determining the characteristic of the compensation member of a level control loop are used and are covered by the invention.
- an analogue realization is also covered by the invention.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05769751A EP1771942A1 (de) | 2004-08-05 | 2005-06-29 | Reglergestütztes verfahren und reglergestützte vorrichtung zur bestimmung der kennlinie eines kompensationsgliedes in einem pegelregelkreis |
JP2007524200A JP2008508824A (ja) | 2004-08-05 | 2005-06-29 | レベル制御回路における補償要素の特性を判定するコントローラアシスト方法及びコントローラアシスト装置 |
US11/659,384 US7647029B2 (en) | 2004-08-05 | 2005-06-29 | Controller-assisted method and controller-assisted device for determining a characteristic of a compensation member in a level control circuit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102004038089.9 | 2004-08-05 | ||
DE102004038089.9A DE102004038089B4 (de) | 2004-08-05 | 2004-08-05 | Reglergestütztes Verfahren und reglergestützte Vorrichtung zur Bestimmung der Kennlinie eines Kompensationsgliedes in einem Pegelkreis |
Publications (1)
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WO2006015663A1 true WO2006015663A1 (de) | 2006-02-16 |
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Family Applications (1)
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PCT/EP2005/007001 WO2006015663A1 (de) | 2004-08-05 | 2005-06-29 | Reglergestütztes verfahren und reglergestützte vorrichtung zur bestimmung der kennlinie eines kompensationsgliedes in einem pegelregelkreis |
Country Status (5)
Country | Link |
---|---|
US (1) | US7647029B2 (de) |
EP (1) | EP1771942A1 (de) |
JP (1) | JP2008508824A (de) |
DE (1) | DE102004038089B4 (de) |
WO (1) | WO2006015663A1 (de) |
Families Citing this family (1)
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FR2984495B1 (fr) | 2011-12-15 | 2016-04-15 | Valeo Systemes De Controle Moteur | Procede de mesure de la temperature |
Citations (3)
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DE3636865A1 (de) * | 1986-06-06 | 1987-12-10 | Licentia Gmbh | Anordnung zur linearisierung einer endstufe |
US5194823A (en) * | 1990-12-03 | 1993-03-16 | Siemens Aktiengesellschaft | Modulation means for an rf power amplifier |
US5697073A (en) * | 1994-08-26 | 1997-12-09 | Motorola, Inc. | Apparatus and method for shaping and power controlling a signal in a transmitter |
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DE2633200A1 (de) * | 1976-07-23 | 1978-01-26 | Siemens Ag | Schaltungsanordnung zum ausgleich des frequenzabhaengigen amplitudenfehlers eines abstimmbaren messenders und/oder messempfaengers |
JPS5846707A (ja) * | 1981-09-14 | 1983-03-18 | Anritsu Corp | 出力レベル制御回路 |
DE3610252A1 (de) * | 1986-03-26 | 1987-10-08 | Alfons Prof Dr Ing Dr Gottwald | Verstaerkerschaltung mit rueckkopplung |
JPH02162813A (ja) * | 1988-12-15 | 1990-06-22 | Nec Eng Ltd | 可変減衰器 |
DE69020538T2 (de) | 1989-07-15 | 1996-02-22 | Philips Electronics Nv | Automatische pegelregelung. |
JPH0595240A (ja) * | 1991-09-30 | 1993-04-16 | Mitsubishi Electric Corp | 送信電力制御回路 |
JPH07245541A (ja) * | 1994-03-07 | 1995-09-19 | Mitsubishi Electric Corp | 電力増幅器 |
DE19524037A1 (de) * | 1995-07-01 | 1997-01-02 | Telefunken Sendertechnik | HF-Leistungsverstärker |
JPH09148864A (ja) * | 1995-11-22 | 1997-06-06 | Shimada Phys & Chem Ind Co Ltd | 出力レベル制御回路 |
JPH1051252A (ja) * | 1996-07-31 | 1998-02-20 | Kokusai Electric Co Ltd | 無線機及び無線機の利得制御回路 |
DE19846109A1 (de) * | 1997-10-10 | 1999-04-29 | Motorola Inc | HF-Sender mit Steuerschaltung zur Temperaturkompensation des Ausgangsleistungspegels und dazugehörendes Verfahren |
JP3314723B2 (ja) * | 1998-06-10 | 2002-08-12 | 日本電気株式会社 | ディジタル自動利得制御用リニアライザ及びこれを用いたディジタル自動利得制御回路 |
JP3381689B2 (ja) * | 1999-11-30 | 2003-03-04 | 日本電気株式会社 | 非線形歪み補償回路及びそれを用いた送信装置並びに移動通信機 |
WO2001063750A1 (en) * | 2000-02-24 | 2001-08-30 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | System for reducing adjacent-channel interference by pre-linearization and pre-distortion |
JP2002111401A (ja) * | 2000-10-03 | 2002-04-12 | Fujitsu Ltd | 信号の歪補償装置および歪補償方法 |
KR100438445B1 (ko) * | 2001-03-22 | 2004-07-03 | 삼성전자주식회사 | 비선형 왜곡 보상 방법 및 비선형 왜곡 보상 회로 |
KR100468360B1 (ko) * | 2002-07-25 | 2005-01-27 | 인티그런트 테크놀로지즈(주) | 수신 장치의 선형성 개선을 위한 하모닉 회로 |
JP3796204B2 (ja) * | 2002-07-31 | 2006-07-12 | 松下電器産業株式会社 | マルチキャリア送信信号のピーク抑圧方法およびピーク抑圧機能をもつマルチキャリア送信信号生成回路 |
JP4100142B2 (ja) * | 2002-11-20 | 2008-06-11 | 日本電気株式会社 | 携帯電話端末、携帯電話端末の制御方法、プログラム、及び記録媒体 |
-
2004
- 2004-08-05 DE DE102004038089.9A patent/DE102004038089B4/de active Active
-
2005
- 2005-06-29 US US11/659,384 patent/US7647029B2/en not_active Expired - Fee Related
- 2005-06-29 EP EP05769751A patent/EP1771942A1/de not_active Withdrawn
- 2005-06-29 WO PCT/EP2005/007001 patent/WO2006015663A1/de active Application Filing
- 2005-06-29 JP JP2007524200A patent/JP2008508824A/ja active Pending
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DE3636865A1 (de) * | 1986-06-06 | 1987-12-10 | Licentia Gmbh | Anordnung zur linearisierung einer endstufe |
US5194823A (en) * | 1990-12-03 | 1993-03-16 | Siemens Aktiengesellschaft | Modulation means for an rf power amplifier |
US5697073A (en) * | 1994-08-26 | 1997-12-09 | Motorola, Inc. | Apparatus and method for shaping and power controlling a signal in a transmitter |
Also Published As
Publication number | Publication date |
---|---|
DE102004038089A1 (de) | 2006-04-06 |
JP2008508824A (ja) | 2008-03-21 |
DE102004038089B4 (de) | 2016-02-04 |
EP1771942A1 (de) | 2007-04-11 |
US20080315947A1 (en) | 2008-12-25 |
US7647029B2 (en) | 2010-01-12 |
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