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WO2006118147A1 - Circuit de modulation de coordonnées polaires, méthode de modulation de coordonnées polaires, circuit intégré et appareil émetteur radio - Google Patents

Circuit de modulation de coordonnées polaires, méthode de modulation de coordonnées polaires, circuit intégré et appareil émetteur radio Download PDF

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Publication number
WO2006118147A1
WO2006118147A1 PCT/JP2006/308739 JP2006308739W WO2006118147A1 WO 2006118147 A1 WO2006118147 A1 WO 2006118147A1 JP 2006308739 W JP2006308739 W JP 2006308739W WO 2006118147 A1 WO2006118147 A1 WO 2006118147A1
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WO
WIPO (PCT)
Prior art keywords
signal
amplitude
phase
unit
modulation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2006/308739
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English (en)
Japanese (ja)
Inventor
Yoshito Shimizu
Noriaki Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to US11/814,181 priority Critical patent/US7715808B2/en
Priority to CN2006800037175A priority patent/CN101111992B/zh
Publication of WO2006118147A1 publication Critical patent/WO2006118147A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H03F1/3282—Acting on the phase and the amplitude of the input signal
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal

Definitions

  • the transmission signal is separated into a constant amplitude phase signal and an amplitude signal, and phase modulation is performed by a phase modulator based on the constant amplitude phase signal, so that the power amplifying unit performs a constant oscillation level at which saturation operation is performed.
  • a method of synthesizing amplitude modulation by inputting a width phase modulation signal and driving a control voltage of a power amplifier at high speed is known. This is called the EER method (Envelope Elimination & Restoration), Meji ⁇ polar, polar modulation method (Po ⁇ ⁇ ⁇ !! system, polar modulation system).
  • This is a method that achieves efficiency (for example, see Non-Patent Document 1). In the following, it differs from the quadrature modulation method. In order to clarify that it is a modulation method, it is called a polar coordinate modulation method.
  • an output signal amplitude characteristic (AM-AM) with respect to a control voltage in a saturation operation type power amplification unit at a predetermined input high-frequency signal amplitude.
  • AM-AM output signal amplitude characteristic
  • AM-PM Amplitude Modulation to Phase Modulation conversion
  • predistortion type distortion compensation is performed with reference to the memory, and after a transmission signal is separated into an amplitude signal and a phase signal, a delay adjustment unit is provided in the path of the amplitude signal or the phase signal. And synchronization between both signals is ensured (see, for example, Patent Document 1).
  • the amplitude information correction unit 904 corrects the input amplitude signal based on the amplitude correction signal output from the memory 903. Based on the output signal from the amplitude information correction unit 904, the amplitude modulation unit 905 drives the control voltage of the power amplification unit 900 at high speed.
  • the phase information correction unit 907 performs correction on the input phase signal based on the phase correction signal output from the memory 903.
  • the phase modulation unit 908 performs phase modulation based on the output signal from the phase information correction unit 907.
  • the amplitude modulation signal and the phase modulation signal distorted in advance in consideration of the inverse characteristic of the output characteristic with respect to the input control signal to the power amplification unit 900 are actually generated in the power amplification unit 900.
  • the desired output amplitude and phase are affected by the amplitude and phase distortion, and the output response (linearity) to the input control voltage can be improved.
  • the delay adjustment unit 9002 can ensure synchronization between the amplitude signal and the phase signal, the transmission signal can be accurately represented.
  • the amplitude modulation section 905 drives the power supply voltage of the power amplification section 900 at high speed based on the analog amplitude signal.
  • the phase modulator 908 performs phase modulation based on analog IQ signals.
  • a signal is generated and output to the power amplifier 900.
  • the change point detection circuit 1104 differentiates the output signal of the power amplifying unit 900 and then detects a signal change point from the positive / negative of the differential value.
  • the delay unit 1105 adjusts the conversion timing of the DA converters 1101 and 1102 at the signal change point detected by the change point detection circuit 1104, that is, the synchronization between the amplitude signal and the phase signal extracted from the IQ signal. To do. With this configuration, it is possible to detect a signal change point and ensure synchronization of the amplitude signal and the phase signal at the signal change point.
  • Patent Document 1 Special Table 2004—501527 (Fig. 11)
  • Patent Document 2 Japanese Translation of Special Publication 2002-530992 (Fig. 2)
  • the loss at the output portion of the power amplifier 900 increases, and the efficiency of the transmitter decreases. In addition, it cannot be used when there is a cause of loss of synchronization other than the signal change point.
  • the polar modulation circuit of the present invention firstly includes a polar coordinate conversion unit that generates an amplitude signal from a baseband quadrature signal generated from transmission data, and an amplitude that generates an amplitude modulation signal based on the amplitude signal.
  • the polar modulation circuit of the present invention is the first polar modulation circuit described above, which stores predetermined predistortion distortion compensation data for amplitude correction processing, and based on the amplitude signal, And a memory unit for outputting an amplitude correction signal or a phase correction signal for the amplitude signal or the signal having at least the phase component, respectively.
  • the polar modulation circuit of the present invention is the first or second polar modulation circuit, wherein the delay amount information is an output of the amplification unit with respect to an input control signal to the amplification unit. This is a value determined based on the step response characteristics.
  • the polar modulation circuit of the present invention is the first or second polar modulation circuit, wherein the delay amount determination unit uses the delay amount information as an amplitude value of the amplitude signal or the amplitude signal.
  • a data table is stored for each transmission level information.
  • the polar modulation circuit according to the present invention is the first or second polar modulation circuit, wherein the phase modulation unit is configured based on phase information output from the delay adjustment unit. And a quadrature coordinate conversion unit that generates a quadrature signal having an amplitude value and a quadrature modulation unit that generates a phase modulation signal in a radio frequency band based on the quadrature signal and outputs the phase modulation signal to the amplifying unit.
  • the polar modulation circuit of the present invention is the sixth polar modulation circuit, wherein the second delay adjustment unit includes a plurality of signal amplitude values after delay adjustment in a predetermined operation clock unit. And linear interpolation based on the delay amount information.
  • the polar modulation circuit of the present invention includes a polar coordinate conversion unit that generates an amplitude signal from a baseband quadrature signal generated from transmission data, and an amplitude that generates an amplitude modulation signal based on the amplitude signal.
  • a modulation unit a phase modulation unit that generates a phase modulation signal in a radio frequency band based on a signal having at least a phase component of the baseband quadrature signal, and the phase modulation signal as an input high-frequency signal;
  • an amplification unit that generates transmission data in a radio frequency band, and transmission level information indicating the amplitude value of the amplitude signal or the radio transmission level of the transmission data, Stores phase adjustment amount information for correcting a phase difference between the amplitude signal and the phase signal.
  • a phase adjustment amount determination unit and a phase adjustment unit that adjusts the phase of the amplitude signal or the signal having at least a phase component based on the phase adjustment amount information.
  • the polar modulation circuit of the present invention is the eighth polar modulation circuit described above, which stores predetermined predistortion distortion compensation data for amplitude correction processing, and based on the amplitude signal, And a memory unit for outputting an amplitude correction signal or a phase correction signal for the amplitude signal or the signal having at least the phase component, respectively.
  • the distortion compensation accuracy can be improved.
  • the polar modulation circuit of the present invention is the ninth polar modulation circuit, wherein the phase adjustment unit includes a multiplication circuit that multiplies the phase adjustment amount information and the phase correction signal. Composed.
  • a polar coordinate conversion step of generating an amplitude signal from a baseband orthogonal signal generated from transmission data, and an amplitude of generating an amplitude modulation signal based on the amplitude signal A modulation step; a phase modulation step for generating a phase modulation signal in a radio frequency band based on a signal having at least a phase component of the baseband quadrature signal; and the phase modulation signal as an input high-frequency signal;
  • an amplitude modulation signal as a control signal
  • an amplification step for generating transmission data in a radio frequency band, and transmission level information indicating the amplitude value of the amplitude signal or the radio transmission level of the transmission data In order to correct a delay difference between paths of the amplitude signal and the phase signal
  • An integrated circuit of the present invention is thirteenth mounted with any one of the first to eleventh polar modulation circuits.
  • the wireless transmission device of the present invention includes any one of the first to eleventh polar modulation circuits or the thirteenth integrated circuit.
  • the polar modulation circuit and the polar coordinate modulation method capable of compensating for the delay difference between the path of the phase signal and the amplitude signal while suppressing an increase in circuit scale.
  • An integrated circuit and a wireless transmission device can be provided.
  • FIG. 1 is a diagram showing a configuration of a polar modulation circuit according to a first embodiment of the present invention.
  • FIG. 2 is a diagram showing AM-AM characteristics and AM-PM characteristics of the power amplification unit according to the first embodiment of the present invention.
  • FIG. 3 is a diagram showing another configuration of the polar modulation circuit according to the first embodiment of the present invention.
  • FIG. 4 is a diagram showing a configuration of a power amplifying unit according to the first embodiment of the present invention.
  • FIG. 5 is a diagram showing step response characteristics of the power amplifying unit according to the first embodiment of the present invention.
  • FIG. 6 is a diagram showing a configuration of a polar modulation circuit according to a second embodiment of the present invention.
  • FIG. 7 is a diagram showing a configuration of a polar modulation circuit according to a third embodiment of the present invention.
  • FIG. 8 is a diagram showing a configuration of a delay adjustment unit according to a fourth embodiment of the present invention.
  • FIG. 14 is a block diagram showing a configuration of a transmission device according to a conventional technique
  • the first embodiment of the present invention analyzes the operation of the power amplifying unit in the polar modulation circuit, estimates the cause of the delay, and identifies the cause of the delay, thereby performing the synchronization adjustment of the predistortion method. This section explains how to ensure synchronization by using a feedback system that branches the output signal of the power amplifier.
  • FIG. 1 is a diagram showing an example of a schematic configuration of a polar modulation circuit according to the first embodiment of the present invention.
  • this polar modulation circuit includes a power amplification unit 105, a polar coordinate conversion unit 106, an amplitude controller unit 109 having an amplitude information correction unit 107 and an amplitude modulation unit 108, a phase information correction unit 110, and a phase A phase modulation signal generation unit 112 having a modulation unit 111, a memory 101, a delay amount determination unit 102, and delay adjustment units 103 and 104 are provided.
  • Polar coordinate conversion unit 106 uses IQ signal (1, Q) as transmission data input from a baseband signal generation unit (not shown) of the transmission device when the polar modulation circuit of the present invention is used in the transmission device. ) Is separated into an amplitude signal r and a constant amplitude phase signal ⁇ .
  • the amplitude signal r (t) is normalized so that the maximum value is 1.
  • the amplitude information correction unit 107 corrects the input amplitude signal based on the amplitude correction signal output from the memory 101.
  • the amplitude modulation unit 108 drives the control voltage of the power amplification unit 105 at high speed based on the output signal from the amplitude information correction unit 107.
  • the phase information correction unit 110 performs correction on the input phase signal based on the phase correction signal output from the memory 101.
  • Phase modulation section 111 generates a radio frequency phase modulation signal based on the output signal from phase information correction section 110 and outputs the phase modulation signal to power amplification section 105.
  • the power amplifying unit 105 receives the phase modulation signal output from the phase modulation unit 111 as an input high-frequency signal and inputs the amplitude modulation signal output from the amplitude modulation unit 108 as a control signal. Transmission data in the radio frequency band is generated.
  • Transmission level information S1 is an unillustrated antenna force that is arranged after the power amplifying unit 105 transmitted from the control unit of the not-shown transmitter when the polar modulation circuit of the present invention is used in the transmitter. This is information for determining the average output level, and is input to the memory 101 and the delay amount judgment unit 102.
  • the transmission level information corresponds to the antenna output level specified in 2 dB steps between 33 dBm and 5 dBm, for example, in the case of a mobile station transmitting by 8-PSK modulation in the 900 MHz band GSM band. To do.
  • the memory 101 stores AM-AM characteristics and AM-PM characteristics for a control signal input to the power amplification unit 105 in a state where a predetermined input high-frequency signal amplitude is given to the power amplification unit 105.
  • the memory 101 accesses the stored AM-AM characteristic and AM-PM characteristic using the amplitude signal r (t) output from the polar coordinate converter 106 as a reference signal, and the AM- Outputs amplitude correction signal Rcomp (t), which is the inverse of AM characteristics, to amplitude information correction unit 107, and outputs phase correction signal Tcomp (t), which is the inverse of AM-PM characteristics, to phase information correction unit 110 To do.
  • the memory 101 performs normalization processing of AM-AM characteristics based on the transmission level information S1. Specifically, for the desired output level (average power), based on the maximum transmission power considering the maximum value (peak factor) of the amplitude information according to the modulation method, the stored AM-AM data By performing normalization of the output signal amplitude, correction is performed for each desired output level. This regularity enables access to AM-AM data using the input amplitude information r (t) as an address designation signal.
  • the delay amount determination unit 102 receives the amplitude signal!: (T) output from the polar coordinate conversion unit 106 and The synchronization shift between the amplitude signal r and the phase signal ⁇ is calculated by referring to the data table power for the delay amount obtained in advance corresponding to the transmission level information si. Then, the delay amount information for correcting the synchronization shift is transmitted to the delay adjustment units 103 and 104. The detailed operation of the delay amount determination unit 102 will be described later.
  • delay adjustment unit 103 delays only the time with respect to phase signal ⁇ (t) output from polar coordinate conversion unit 106.
  • the phase signal 0 (t— ⁇ ) given is generated and output to the phase information correction unit 110.
  • delay adjustment unit 104 Based on the delay amount information transmitted from delay amount determination unit 102, delay adjustment unit 104 gives a delay of time ⁇ to phase correction signal Tcomp (t) transmitted from memory 101.
  • the phase correction signal Tcomp (t— ⁇ ) is generated and output to the phase information correction unit 110.
  • the delay adjustment unit 104 gives a delay amount equivalent to that of the delay adjustment unit 103, whereby the phase signal and the phase information correction signal, which are input signals to the phase information correction unit 110, are provided. The same period is secured.
  • FIG. 2 is a diagram illustrating an example of AM-AM characteristics and AM-PM characteristics of the power amplifying unit 105.
  • AM—AM characteristic 201 is an output voltage characteristic (AM—AM characteristic) with respect to the control voltage
  • AM—PM characteristic 202 is a pass phase characteristic (AM—PM characteristic) with respect to the control voltage. It can be easily obtained using a network analyzer or the like.
  • FIG. 2 shows the relationship between the output voltage, the control voltage, and the phase rotation amount in the desired power amplifying unit 105. An example of a distortion compensation method is also shown.
  • converting the output voltage axial force to the control voltage axis also determines the inverse characteristic of the AM-AM characteristic 201, and the signal output from the polar coordinate conversion unit 106
  • the corrected amplitude signal r2 (t) 2 04 obtained from the inverse characteristic of the AM-AM characteristic 201 becomes the distortion signal of the amplitude signal.
  • the corrected amplitude signal r2 (t) becomes the control voltage input to the power amplifier 105, and therefore, conversion from the control voltage axis to the phase rotation amount axis is performed.
  • the phase correction signal Tcomp (t) 205 transmitted from the memory 101 can be obtained.
  • this phase correction signal Tcomp (t) 205 is achieved. Compensation can be performed.
  • predistortion is performed in consideration of the reverse characteristic of the output characteristic with respect to the input control signal to the power amplifying unit.
  • the amplitude modulation signal and phase modulation signal take into account the amount of delay generated in the power amplification unit, and are affected by the actual amplitude and phase distortion, resulting in the desired output amplitude and phase.
  • the output signal for the input control voltage The linearity of can be improved.
  • FIG. 3 As another example of the transmission apparatus according to the first embodiment of the present invention, the configuration shown in FIG. 3 may be provided.
  • FIG. 3 is a diagram showing another example of a schematic configuration of the polar modulation circuit according to the first embodiment of the present invention.
  • the polar modulation circuit includes a power amplification unit 105, a polar coordinate conversion unit 106, an amplitude controller unit 109 having an amplitude information correction unit 107 and an amplitude modulation unit 108, a phase information correction unit 110, and A phase modulation signal generation unit 112 having a phase modulation unit 111, a delay amount determination unit 102, delay adjustment units 103 and 301, and a memory 302 are provided.
  • a delay adjustment unit 301 is provided instead of the delay adjustment unit 104
  • a memory 302 is provided instead of the memory 101. Parts that overlap with the polar modulation circuit in FIG.
  • the transmission level information S 1 is transmission level information of the power amplifying unit 105 transmitted from the control unit of the transmission device (not shown) when the polar coordinate modulation circuit of the present invention is used for the transmission device, and the memory 302 And input to the delay amount determination unit 102.
  • delay adjustment unit 301 Based on the delay amount information transmitted from delay amount determination unit 102, delay adjustment unit 301 performs time ⁇ only on the amplitude signal!: (T) transmitted from polar coordinate conversion unit 106. Amplitude signal r (t— ⁇ ) with delay is generated, and amplitude signal r (t— ⁇ ) is output as a reference signal of AM— ⁇ characteristic to memory 302, and a reference signal of AM—AM characteristic Output an amplitude signal!: (T).
  • the delay time given to the reference signal of AM-PM characteristic is the delay time given to the phase signal ⁇ (t) transmitted from the polar coordinate conversion unit 106 by the delay adjustment unit 103.
  • the memory 302 stores AM-AM characteristics and AM-PM characteristics for the input control signal of the power amplifying unit 105 when a high-frequency signal having a predetermined amplitude is input.
  • FIG. 7 is a diagram showing an example of a schematic configuration of a polar modulation circuit according to the third embodiment of the present invention.
  • this polar modulation circuit includes a power amplifier 105 and a polar coordinate converter.
  • a signal generation unit 112, a delay amount determination unit 102, and a memory 101 are provided.
  • an orthogonal coordinate conversion unit 113 is added to the polar coordinate modulation circuit of FIG. 6 shown in the second embodiment of the present invention, and the phase modulation unit 111 is replaced with a quadrature modulation unit 111C. . Note that portions that overlap with the polar coordinate modulation circuit in FIG.
  • the orthogonal modulation unit 111 C generates a radio frequency band phase modulation signal based on the orthogonal signal output from the orthogonal coordinate conversion unit 113 and outputs the phase modulation signal to the power amplification unit 105.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

L’invention concerne un circuit de modulation de coordonnées polaires, une méthode de modulation de coordonnées polaires, un circuit intégré et un appareil émetteur radio, où une différence de retard dû au chemin entre un signal de phase et un signal d’amplitude peut être compensée avec une haute précision dans un système de modulation de coordonnées polaires sans que cela entraîne une augmentation de la taille du circuit. Une partie de détermination de quantité de retard (102) stocke, en tant que données de table, l’information quantité de retard qui est basée sur la réponse en escalier caractéristique d’une partie amplification de puissance (105), pour les valeurs d’amplitude de signaux d’amplitude et pour l’information niveau d’émission (S1). De cette manière, l’ajustement de retard est réalisé avec un signal d’amplitude et une information de niveau d’émission (S1) employés en tant que signaux de référence, la différence de retard dû au chemin entre le signal d’amplitude et le signal de phase pouvant être compensée avec une haute précision sans que cela entraîne une augmentation de la taille du circuit.
PCT/JP2006/308739 2005-04-28 2006-04-26 Circuit de modulation de coordonnées polaires, méthode de modulation de coordonnées polaires, circuit intégré et appareil émetteur radio Ceased WO2006118147A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/814,181 US7715808B2 (en) 2005-04-28 2006-04-26 Polar modulating circuit, polar coordinate modulating method, integrated circuit and radio transmission device
CN2006800037175A CN101111992B (zh) 2005-04-28 2006-04-26 极化调制、极坐标调制方法、集成电路和无线电传送设备

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JP2005-131998 2005-04-28
JP2005131998 2005-04-28
JP2006116185A JP2006333450A (ja) 2005-04-28 2006-04-19 極座標変調回路、極座標変調方法、集積回路および無線送信装置
JP2006-116185 2006-04-19

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JP2009290283A (ja) * 2008-05-27 2009-12-10 Sumitomo Electric Ind Ltd 増幅回路
WO2013176147A1 (fr) * 2012-05-25 2013-11-28 株式会社村田製作所 Circuit d'amplification de puissance
CN114981616A (zh) * 2020-01-29 2022-08-30 舍弗勒技术股份两合公司 离合器致动器、用于对旋转部件的角度位置进行检测的检测系统和方法

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WO2008129611A1 (fr) * 2007-04-06 2008-10-30 Panasonic Corporation Appareil émetteur haute fréquence
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JP5152059B2 (ja) * 2009-03-19 2013-02-27 富士通株式会社 電力増幅装置及び電力増幅方法
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EP3007398A4 (fr) 2013-05-31 2017-01-25 Nec Corporation Circuit de transmission
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US10454747B1 (en) * 2018-09-07 2019-10-22 Innophase, Inc. Systems and methods for up-sampling a polar amplitude sample stream in a polar modulator
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WO2013176147A1 (fr) * 2012-05-25 2013-11-28 株式会社村田製作所 Circuit d'amplification de puissance
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CN114981616B (zh) * 2020-01-29 2024-03-15 舍弗勒技术股份两合公司 离合器致动器、用于对旋转部件的角度位置进行检测的检测系统和方法

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CN101111992A (zh) 2008-01-23
JP2006333450A (ja) 2006-12-07

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