WO2008072700A1 - Dispositif de transmission - Google Patents

Dispositif de transmission Download PDF

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Publication number
WO2008072700A1
WO2008072700A1 PCT/JP2007/074043 JP2007074043W WO2008072700A1 WO 2008072700 A1 WO2008072700 A1 WO 2008072700A1 JP 2007074043 W JP2007074043 W JP 2007074043W WO 2008072700 A1 WO2008072700 A1 WO 2008072700A1
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WO
WIPO (PCT)
Prior art keywords
amplitude
signal
correction
unit
modulation signal
Prior art date
Application number
PCT/JP2007/074043
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English (en)
Japanese (ja)
Inventor
Tsutomu Hibino
Hitomaro Tougou
Shinji Ookawa
Shiro Masumoto
Original Assignee
Panasonic Corporation
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Publication of WO2008072700A1 publication Critical patent/WO2008072700A1/fr

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • 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
    • 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
    • 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
    • H03F1/0261—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 polarisation voltage or current, e.g. gliding Class A
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/324—An amplitude modulator or demodulator being used in the amplifier circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/504—Indexing scheme relating to amplifiers the supply voltage or current being continuously controlled by a controlling signal, e.g. the controlling signal of a transistor implemented as variable resistor in a supply path for, an IC-block showed amplifier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/045—Circuits with power amplifiers with means for improving efficiency

Definitions

  • the present invention relates to a transmission device that amplifies and transmits a modulation signal including an amplitude modulation component and a phase modulation component.
  • a transmitter using the EER system includes an input terminal 1, a limiter 2, an amplitude detector 3, a power supply voltage controller 4, and a power amplifier 5.
  • the input terminal 1 receives a modulation signal as shown in FIG. 2A having a phase modulation component and an amplitude modulation component.
  • the modulated signal input from the input terminal 1 is branched into two, one being input to the limiter 2 and the other being input to the amplitude detector 3.
  • the limiter 2 removes the amplitude modulation component of the input modulation signal and outputs a phase modulation signal having a constant envelope as shown in FIG. 2B.
  • the amplitude detector 3 detects the amplitude component of the input modulation signal and outputs an amplitude signal as shown in FIG. 2C.
  • the power supply voltage control unit 4 controls the power supply voltage of the power amplifier 5 according to the amplitude of the output signal of the amplitude detection unit 3.
  • the power amplifier 5 amplifies the phase modulation signal having a constant envelope that is the output signal of the limiter 2. At this time, since the power supply voltage of the power amplifier 5 changes according to the amplitude signal of FIG. 2C, the gain of the power amplifier 5 changes. As a result, the output signal of the power amplifier 5 is an amplified input signal as shown in FIG. 2D.
  • the EER system has an operation limit when the output power of the power amplifier becomes low, that is, on the low output side.
  • the power amplifier is operated linearly when the amplitude of the input modulation signal is equal to or smaller than a predetermined threshold value, and the power amplifier is operated when the amplitude is equal to or larger than the predetermined threshold value.
  • Patent Document 1 Various methods have been proposed for switching between linear operation and EER operation of power amplifiers (for example, Patent Documents 2 and 3).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-104194 (Page 9, Figure 4)
  • Patent Document 2 JP 2005-184273 A (page 16, Fig. 7)
  • Patent Document 3 Japanese Patent Laid-Open No. 2005-198109 (page 11, Fig. 5)
  • Non-Patent Document 1 F. H. Raab, Proc. Sixth Int. Conf. HF Radio Syst ems and Techniques (HR '94), pp. 21— 25, July 4— 7, 1994.
  • the amplitude detector has a nonlinear characteristic. Therefore, the band of the amplitude signal for controlling the power supply voltage is widened. Specifically, the bandwidth of the amplitude signal that is the output signal of the amplitude detection unit is expanded several times that of the input signal.
  • the power supply voltage control unit needs to control the power supply voltage of the power amplifier at a high frequency. This strict! / Power supply voltage control unit that satisfies the requirements is generally expensive and has low power efficiency. When the power efficiency of the power supply voltage control unit is lowered, there is a problem that the power efficiency of the entire transmission device is lowered even if the power efficiency of the main power amplifier is high.
  • An object of the present invention is to provide a transmitter capable of realizing a reduction in price and increasing power efficiency by relaxing requirements for a power supply voltage control unit. Means for solving the problem
  • a transmission apparatus includes a power amplifier that amplifies an input modulation signal according to an applied power supply voltage, and a power supply voltage control that controls an applied power supply voltage of the power amplifier according to an amplitude component of the modulation signal. And an amplitude component for correcting the amplitude width between the maximum amplitude and the minimum amplitude of the amplitude component to be small and further removing a high frequency component from the corrected amplitude component. And a correction means.
  • FIG. 1 is a block diagram showing a configuration of a conventional transmission device
  • FIG. 2 is a diagram showing signal waveforms at various parts in a conventional transmitter.
  • FIG. 3 Diagram showing characteristics of components in a conventional transmitter
  • FIG. 4 is a block diagram showing a configuration of a transmission apparatus according to Embodiment 1 of the present invention.
  • FIG. 5 is a block diagram showing the configuration of the amplitude signal correction unit in FIG.
  • FIG. 6 is a diagram showing the characteristics of the low-amplitude component limiting unit and the low-pass filter unit of FIG.
  • FIG. 7 is a block diagram showing the configuration of the modulation signal correction unit in FIG.
  • FIG. 8 is a block diagram showing the configuration of the correction coefficient calculation unit in FIG.
  • FIG. 9 is a diagram showing phase characteristics and amplitude characteristics of the modulation signal correction unit in FIG.
  • FIG. 10 is a diagram showing signal waveforms at various parts of the amplitude signal correction unit in FIG.
  • FIG. 11 is a block diagram showing a configuration of a transmitting apparatus according to Embodiment 2.
  • FIG. 12 is a block diagram showing the configuration of the correction characteristic updating unit in FIG.
  • FIG. 4 is a block diagram showing a configuration of transmitting apparatus 100 according to Embodiment 1 of the present invention.
  • Transmitting apparatus 100 to which the EER scheme in this embodiment is applied includes an input unit 101 to which a modulation signal having a phase modulation component and an amplitude modulation component is input, and a transmission unit 102 that outputs a high-frequency signal from the input modulation signal
  • a power amplifier 103 that amplifies the high-frequency signal that is the output of the transmitter 102, an amplitude detector 104 that detects the amplitude component of the modulated signal input to the input unit 101, and a detected amplitude component signal (in the figure,
  • An amplitude signal correction unit 105 that corrects the amplitude signal c) and outputs the corrected signal as a control signal
  • a power source that controls the power supply voltage of the power amplifier 103 based on the control signal output from the amplitude signal correction unit 105
  • a voltage control unit 106 and a force are also configured.
  • the amplitude signal correction unit 105 determines the amplitude width between the maximum amplitude and the minimum amplitude of the amplitude component signal detected by the amplitude detection unit 104 (hereinafter referred to as "maximum minimum amplitude width"). Amplitude signal correction processing is performed in which correction is performed to reduce the amplitude and further, high-frequency components are removed from the corrected amplitude component signal.
  • the power supply voltage control unit 106 controls the power supply voltage of the power amplifier 103 based on the amplitude component signal after the amplitude signal correction processing.
  • the amplitude signal correcting unit 105 includes a low amplitude component limiting unit 203 and a low-pass filter unit 204.
  • the low amplitude component limiting unit 203 corrects the amplitude component signal so as to reduce the maximum and minimum amplitude width of the amplitude component signal detected by the amplitude detection unit 104.
  • the low-amplitude component limiting unit 203 corrects the input signal by amplifying the amplitude of the portion below the predetermined threshold value from the amplitude component signal to the threshold value.
  • the low-amplitude component limiting unit 203 sets an output signal having a certain amplitude value for a portion of the input signal up to a certain amplitude, and exceeds the certain amplitude value.
  • An output signal having an amplitude value corresponding to the amplitude of the part has an output characteristic.
  • the low-pass filter unit 204 passes only the low frequency component of the amplitude component signal corrected by the low amplitude component limiting unit 203. In other words, the low-pass filter unit 204 removes a sharp portion (first-order differential discontinuity) generated in the amplitude component signal by the correction in the low amplitude component limiting unit 203. That is, the low-pass filter unit 204 has a filter characteristic as shown in FIG. 6B.
  • the transmission unit 102 sends an input signal of the power amplifier 103 necessary for obtaining an output signal of the desired power amplifier 103 to the input unit 101 at an applied power supply voltage applied to the power source of the power amplifier 103. Formed from the input modulation signal.
  • Transmitting section 102 has modulation signal correction section 111 that corrects the amplitude component and phase component of the input modulation signal based on the applied power supply voltage and the desired output signal of power amplifier 103, and the amplitude component and phase component are And a signal level conversion unit 112 for converting the level of the corrected modulation signal.
  • the modulation signal correction unit 111 includes a correction coefficient calculation unit 303, a modulation signal phase correction unit 304, and a modulation signal amplitude correction unit 305.
  • the correction coefficient calculation unit 303 calculates the amplitude component correction amount and the phase component correction amount based on the applied power supply voltage and the desired output signal of the power amplifier 103.
  • the correction coefficient calculation unit 303 includes an amplitude calculation unit 404, a power supply voltage calculation unit 405, a phase correction coefficient calculation unit 406, and an amplitude correction coefficient calculation unit 407.
  • the amplitude calculation unit 404 calculates the amplitude value of the input modulation signal, and outputs the obtained amplitude value to the phase correction coefficient calculation unit 406 and the amplitude correction coefficient calculation unit 407.
  • the power supply voltage calculation unit 405 calculates the power supply voltage of the power amplifier 103 corresponding to the modulation signal from the input modulation signal, and outputs the obtained power supply voltage to the phase correction coefficient calculation unit 406 and the amplitude correction coefficient calculation unit 407.
  • the phase correction coefficient calculation unit 406 determines the amplitude value of the input modulation signal and the modulation signal.
  • the phase correction coefficient (phase component correction amount) is calculated based on the power supply voltage corresponding to the signal. As shown in FIG.
  • the phase correction coefficient calculation unit 406 has a calculation characteristic of a phase correction coefficient with respect to an amplitude value that is different for each power supply voltage.
  • the amplitude correction coefficient calculation unit 407 calculates an amplitude correction coefficient (amplitude component correction amount) based on the amplitude value of the input modulation signal and the power supply voltage corresponding to the modulation signal.
  • the amplitude correction coefficient calculation unit 407 has a calculation characteristic of the amplitude correction coefficient with respect to the amplitude value, which is different for each power supply voltage.
  • FIG. 9A is a diagram showing the passing phase of the output signal output from the output terminal 302 with respect to the amplitude of the input signal input to the input terminal 301
  • FIG. FIG. 4 is a diagram showing the amplitude of an output signal output from an output terminal 302 with respect to the input signal amplitude.
  • the passing phase and amplitude characteristics of the modulation signal correcting unit 111 are not a single curve but a set of a plurality of curves. This is because the output of the power supply voltage calculation unit 405 is not uniquely determined with respect to the output of the amplitude calculation unit 404.
  • modulation signal phase correction section 304 corrects the phase of the input modulation signal in accordance with the phase correction coefficient calculated by correction coefficient calculation section 303.
  • the modulation signal amplitude correction unit 305 corrects the amplitude of the input modulation signal in accordance with the amplitude correction coefficient calculated by the correction coefficient calculation unit 303.
  • An input signal a having a phase modulation component and an amplitude modulation component input from the input unit 101 is branched into two and input to the transmission unit 102 and the amplitude detection unit 104.
  • the amplitude signal correction unit 105 performs correction to reduce the maximum / minimum amplitude width of the amplitude component signal (amplitude signal c in the figure) detected by the amplitude detection unit 104, and further performs amplitude correction after the correction. Amplitude signal correction processing is performed to remove high frequency components from the minute signal.
  • the input amplitude signal c has a small amplitude portion as shown in FIG. 10A.
  • the amplitude signal correction unit 105 performs correction to reduce the maximum / minimum amplitude width of the amplitude component signal detected by the amplitude detection unit 104.
  • the amplitude of the portion of the amplitude signal c less than the predetermined threshold is amplified to the threshold value. That is, the corrected signal (intermediate signal f) has a shape in which the amplitude is raised to a predetermined threshold as shown in FIG. 10B.
  • the intermediate signal f a sharp portion (a point that cannot be differentiated, a discontinuous point of the first derivative) generated in the modulation signal due to the correction occurs. That is, the intermediate signal f still contains a high-frequency component.
  • the power supply voltage control unit 106 has a wide band from low frequency to high frequency. It is necessary to have a configuration that can handle this. In other words, the bandwidth requirement for the power supply voltage control unit 106 remains severe, and as a result, the expensive power supply voltage control unit 106 needs to be mounted on the transmission device 100.
  • the amplitude signal correction unit 105 further performs a process of removing the high frequency component from the corrected amplitude component signal. Specifically, the amplitude signal correction unit 105 passes the low frequency component of the input intermediate signal f without attenuation, and passes the high frequency component of the intermediate signal f attenuated at a predetermined rate. That is, the band-limited signal (control signal d) has a smooth shape as shown in FIG. 10C. By doing so, the sharp portion generated by the correction in the intermediate signal f can be removed, so that the control signal d having a narrow band can be obtained.
  • the bandwidth of the amplitude signal input to the power supply voltage control unit 106 in the output stage can be narrowed, and the request regarding the bandwidth to the power supply voltage control unit 106 can be relaxed.
  • the high-frequency component is reduced compared to the amplitude signal c, and the dynamic range of the control signal d and the intermediate signal f is equivalent. Since the dynamic range is reduced compared to the amplitude signal c, the demand on the power supply voltage control unit 106 can be relaxed, so that the power supply voltage control unit 106 can be made smaller and less expensive.
  • the output signal of the power amplifier 103 becomes the desired power. There is a possibility of deviating from the value and phase. In other words, the distortion caused by the correction of the amplitude signal and the distortion caused by the change of the power supply voltage are the power amplifier 103. May occur in the output signal.
  • the input signal of the power amplifier 103 necessary for obtaining the output signal of the desired power amplifier 103 at the applied power supply voltage in which the transmission unit 102 is applied to the power supply of the power amplifier 103 Formed from the input modulation signal.
  • the modulation signal correction unit 111 calculates the amplitude component correction amount and the phase component correction amount based on the calculated amplitude value of the input modulation signal and the applied power supply voltage of the power amplifier 103, and calculates the calculated amplitude.
  • the phase and amplitude of the input modulation signal are corrected using the component correction amount and the phase component correction amount.
  • the output signal is converted to the desired power value and phase based on the applied power supply voltage and the desired output signal of the power amplifier 103. Therefore, the input signal (modulation signal) of the power amplifier 103 can be corrected in a form necessary to achieve the above. In this way, it is possible to realize the transmitting apparatus 100 that can simultaneously compensate for both distortion caused by the correction of the amplitude component signal and distortion caused by a change in the power supply voltage.
  • the modulation signal correction unit 111 receives a modulation signal (input signal a) from the input terminal 301 and outputs a signal whose amplitude and phase are corrected from the output terminal 302.
  • the modulation signal input from the input terminal 301 is branched into two, one input to the correction coefficient calculation unit 303 and the other input to the modulation signal phase correction unit 304.
  • the correction coefficient calculation unit 303 calculates the amount of phase and amplitude correction from the input signal a that has been input, and outputs it to the modulation signal phase correction unit 304 and the modulation signal amplitude correction unit 305, respectively. More specifically, the input signal a input from the input terminal 401 is branched into two, one being input to the amplitude calculator 404 and the other being input to the power supply voltage calculator 405. The amplitude calculation unit 404 calculates the amplitude value of the input signal a inputted, and outputs the calculation result to the phase correction coefficient calculation unit 406 and the amplitude correction coefficient calculation unit 407.
  • the power supply voltage calculation unit 405 calculates the power supply voltage supplied to the power amplifier 103 from the input signal a input, and outputs the calculation result to the phase correction coefficient calculation unit 406 and the amplitude correction coefficient calculation unit 407.
  • Phase correction coefficient calculation section 406 calculates a phase correction coefficient using the amplitude value of input signal a obtained from amplitude calculation section 404 and the power supply voltage applied to power amplifier 103 obtained from power supply voltage calculation section 405. The calculated phase correction coefficient is output from the phase correction coefficient output terminal 402, and the modulated signal Used in the phase correction unit 304.
  • the amplitude correction coefficient calculation unit 407 calculates the amplitude correction coefficient using the amplitude value of the input signal a obtained from the amplitude calculation unit 404 and the power supply voltage applied to the power amplifier 103 obtained from the power supply voltage calculation unit 405.
  • the calculated amplitude correction coefficient is output from the amplitude correction coefficient output terminal 403 and used in the modulation signal amplitude correction unit 305.
  • the modulation signal phase correction unit 304 corrects the phase of the input signal a input from the input terminal 301 in accordance with the phase correction amount input from the correction coefficient calculation unit 303.
  • the corrected input signal is input to the modulation signal amplitude correction unit 305.
  • the modulation signal amplitude correction unit 305 corrects the amplitude of the input signal in which the phase input from the modulation signal phase correction unit 304 is corrected according to the amplitude correction amount input from the correction coefficient calculation unit 303.
  • the signal whose phase and amplitude are corrected by the modulation signal phase correction unit 304 and the modulation signal amplitude correction unit 305 is output to the output terminal 302.
  • the amplitude correction is performed after the phase correction! /, And the modulation signal level complementary correction unit 304 and the modulation signal amplitude correction unit 305 are characteristic in the present invention even if the order of the modulation signal amplitude correction unit 305 is reversed. Functions can be realized as well.
  • the amplitude signal c that is the output signal of the amplitude detection unit 104 can be used as a signal used for the calculation of the amplitude correction coefficient and the phase correction coefficient.
  • a control signal d that is an output signal of the amplitude signal correction unit 105 can be used instead of the output signal of the power supply voltage calculation unit 405.
  • the amplitude and phase of the output signal e also change depending on the high-frequency signal b that is the output signal of the transmission unit 102 and only the power supply voltage that is the output signal of the power supply voltage control unit 106.
  • the amplitude signal correction unit 105 since the amplitude signal correction unit 105 includes the low-pass filter 204, the power supply voltage of the power amplifier 103 is not uniquely determined with respect to the amplitude of the input signal a.
  • the amplitude signal correction unit 105 includes the low amplitude component limiting unit 203, the input signal is supplied to the power supply voltage of the power amplifier 103.
  • the amplitude of issue a is not uniquely determined. Therefore, in order to minimize the distortion generated in the power amplifier 103, it is necessary to correct the phase and amplitude of the input signal a according to the power supply voltage applied to the power amplifier 103 and the amplitude of the input signal a. .
  • the modulation signal correction unit 111 having the configuration as shown in FIG. 7 appropriate phase correction and amplitude correction can be performed on the input signal a. At this time, in order to minimize the distortion included in the output signal e of the power amplifier 103, the appropriate phase correction amount and amplitude correction amount change according to the power supply voltage applied to the power amplifier 103 and the amplitude of the input signal a. Therefore, the characteristics of the modulation signal correction unit 111 have the characteristics shown in FIG.
  • phase and amplitude of the input signal a can be corrected according to the power supply voltage of the power amplifier 103 and the amplitude of the input signal a, and the distortion included in the output signal e of the power amplifier 103 can be reduced to the maximum.
  • the transmission unit 102 may include a frequency conversion circuit.
  • a band-pass filter may be included to suppress unwanted radiation components that accompany frequency conversion. In either case, the functions characteristic of the present invention can be realized in the same manner.
  • one or more of the! / And the deviation of the amplitude detection unit 104, the amplitude signal correction unit 105, and the modulation signal correction unit 111 shown in the present embodiment may be a circuit using digital signal processing. Achieving power S At this time, if the above block is realized by a circuit using digital signal processing, the apparatus size can be reduced. Even when digital signal processing is used, the functions characteristic of the present invention can be similarly realized.
  • the transmission device 100 uses a digital-analog converter.
  • the transmission unit 102 may include a low-pass filter for removing image components associated with digital-analog conversion.
  • the transmission unit 102 may include a frequency conversion circuit.
  • a band pass filter may be included to suppress the minutes. In either case, the functions characteristic of the present invention can be realized in the same way.
  • the phase and amplitude can be corrected at a time by multiplying the input signal a by a complex number.
  • the modulation signal phase correction unit 304 and the modulation signal amplitude correction unit 305 can be realized by a single block.
  • the phase correction coefficient calculation unit 406 and the amplitude correction coefficient calculation unit 407 can be realized by a single block for calculating a complex correction coefficient.
  • any one or both of the transmission unit 102 and the amplitude signal correction unit 105 described in the present embodiment may include a delay unit that delays an input signal. Since the above block includes a delay unit that includes an appropriate delay amount, the power supply voltage in the power amplifier 103 and the timing of the high-frequency signal can be accurately matched, and distortion included in the output signal e of the power amplifier 103 can be minimized. It is possible to
  • transmission apparatus 100 has power supply voltage control unit 106 that controls the applied power supply voltage of the power amplifier in accordance with the amplitude component of the modulation signal, and inputs of power supply voltage control unit 106.
  • an amplitude signal correction unit 105 that is provided in a stage and corrects the amplitude width between the maximum amplitude and the minimum amplitude of the amplitude component to be small and further removes a high frequency component from the corrected amplitude component.
  • the amplitude width between the maximum amplitude and the minimum amplitude of the amplitude component can be reduced, and the band can be narrowed by removing the high frequency component. Range and bandwidth requirements can be relaxed. For this reason, it is possible to use a small and inexpensive power supply voltage control unit 106, which can reduce the price of the transmitter 100 using the EER method and increase the power efficiency. Touch with power.
  • the amplitude signal correction unit 105 includes a low amplitude component limiting unit 203 that corrects the amplitude component by amplifying the amplitude of the portion of the amplitude component that is less than the threshold value to the threshold value, and the corrected amplitude component. And a low-pass filter unit 204 for removing high-frequency components from the filter.
  • the amplitude of the amplitude component that is less than the threshold is reduced to the threshold. Therefore, the amplitude width between the maximum amplitude and the minimum amplitude in the input signal of the amplitude signal correction unit 105 can be reduced, and the high frequency component is removed from the corrected amplitude component. The bandwidth of the input signal can be reduced.
  • transmitter 100 is provided at the input stage of power amplifier 103, and the amplitude and phase of the modulation signal are corrected based on the amplitude component of the modulation signal and the applied power supply voltage of power amplifier 103. Further, a modulation signal correction unit 111 is provided.
  • the amplitude and phase of the modulation signal that is the input signal of the power amplifier 103 are corrected based on the amplitude component of the modulation signal and the applied power supply voltage of the power amplifier 103. It is possible to compensate for a deviation from a desired power value and phase in the output signal of the power amplifier 103 that may occur.
  • FIG. 11 is a block diagram showing a configuration of transmitting apparatus 500 according to Embodiment 2 of the present invention.
  • the transmission device 500 calculates a correction coefficient in the amplitude phase correction process according to the difference. Adjust the characteristics.
  • transmitting apparatus 500 is connected to power amplifier 103 and includes force-pla section 501 that extracts a part of the output signal of power amplifier 103, and output of force-pla section 501 connected to force-pla section 501.
  • Receiving unit 502 that converts the signal into a form comparable to input signal a, and correction using the output signal of receiving unit 502 connected to receiving unit 502 and input unit 101 and input signal a input from input unit 101
  • a correction characteristic updating unit 503 that updates coefficient calculation characteristics and a transmission unit 504 that is connected to the input unit 101 and outputs a high-frequency signal b from the input signal a are input.
  • Transmitting section 504 is connected to input signal terminal 101 and correction characteristic updating section 503, and corrects the phase and amplitude of input signal a input from input section 101 according to a predetermined correction coefficient calculation characteristic and A modulation signal correction unit 511 that sequentially adjusts coefficient calculation characteristics according to the output of the correction characteristic update unit 503 is included.
  • Receiving section 502 performs the reverse process when transmitting section 504 and power amplifier 103 operate under ideal conditions.
  • the transmission unit 504 and the power amplifier 103 operate ideally, distortion included in the power amplifier 103 is canceled by the amplitude phase correction processing in the transmission unit 504.
  • the signal contains a certain amount of signal delay and a certain amount of phase rotation. Therefore, receiving section 502 performs signal level conversion, signal phase conversion, and signal delay adjustment.
  • the signal thus obtained can be compared with the input signal a by the correction characteristic updating unit 503, that is, a signal having the same signal level, signal phase, and signal delay as the input signal a corresponding to the actual output signal of the power amplifier 103. It has become.
  • the correction characteristic updating unit 503 is configured to detect the difference in amplitude and phase between the output signal of the reception unit 502 corresponding to the actual output signal of the power amplifier 103 and the input modulation signal (that is, the power amplifier 103 The distortion included in the actual output power is calculated, and the correction coefficient calculation characteristic in the modulation signal correction unit 511 is adjusted based on the difference regarding the amplitude and phase.
  • the correction characteristic updating unit 503 calculates a correction coefficient calculation characteristic that minimizes the difference based on the difference regarding the amplitude and phase, and is set in the modulation signal correction unit 511 at the present time with the calculated correction coefficient calculation characteristic. Update the correction coefficient calculation characteristics.
  • the correction characteristic updating unit 503 includes a comparison unit 604 that detects a difference regarding amplitude and phase, and an applied power supply voltage and modulation of the power amplifier 103 at the time of detection by the comparison unit 604.
  • the correction coefficient calculation unit 605 for calculating the correction characteristic (correction coefficient calculation characteristic) corresponding to the signal and the correction characteristic (correction coefficient calculation) of the modulation signal correction unit 511 using the calculated correction characteristic (correction coefficient calculation characteristic)
  • a correction coefficient updating unit 606 for updating the characteristics).
  • the comparison unit 604 calculates a difference regarding the amplitude and phase between the output signal of the reception unit 502 corresponding to the actual output signal of the power amplifier 103 and the input modulation signal.
  • the difference regarding the amplitude and phase obtained in this way corresponds to the difference between the target output signal of the power amplifier 103 and the actual output signal.
  • the difference related to the amplitude and phase is output to the update correction coefficient calculation unit 605 in relation to the input modulation signal and the power supply voltage of the power amplifier 103 at that time.
  • the update correction coefficient calculation unit 605 calculates a correction coefficient based on the difference regarding the amplitude and the phase from the comparison unit 604 and the power supply voltage of the power amplifier 103 so that the difference regarding the amplitude and the phase is minimized. Calculate the characteristics.
  • the calculated correction factor calculation characteristic is the ratio Similar to the comparison unit 604, the input modulation signal and the power supply voltage of the power amplifier 103 at that time are related and output to the correction coefficient update unit 606.
  • the correction coefficient update unit 606 uses the correction coefficient calculation characteristic calculated by the update correction coefficient calculation unit 605 as the input modulation signal from the update correction coefficient calculation unit 605 and the power source of the power amplifier 103 at that time. Temporarily hold in association with the voltage.
  • the correction coefficient updating unit 606 outputs the correction coefficient calculation characteristics accumulated after the previous output, and the input modulation signal and the power supply voltage of the power amplifier 103, which are associated with the correction coefficient calculation characteristics, at predetermined time intervals. Then, the correction coefficient calculation characteristic in the modulation signal correction unit 511 is updated.
  • receiving section 502 a signal having the same signal level, signal phase, and signal delay as input signal a corresponding to the actual output signal of power amplifier 103 is formed.
  • correction characteristic updating section 503 based on the difference in amplitude and phase between the output signal of receiving section 502 corresponding to the actual output signal of power amplifier 103 and input signal a (input modulation signal), An update correction coefficient calculation characteristic for updating the correction coefficient calculation characteristic of the modulation signal correction unit 511 is calculated.
  • the correction characteristic updating unit 503 calculates correction coefficient calculation characteristics that minimize the difference in amplitude and phase, in other words, between the target output signal of the power amplifier 103 and the actual output signal. Correction coefficient calculation characteristics that minimize the difference in amplitude and phase are calculated.
  • the calculated correction coefficient calculation characteristic is reflected in the modulation signal correction unit 511.
  • comparison section 604 compares output signal e of power amplifier 103 with input signal a, and calculates the difference in association with input signal a.
  • the update correction coefficient calculation unit 605 uses the difference calculated by the comparison unit 604 to calculate a correction coefficient that minimizes the difference between the output signal e and the input signal a in association with the input signal a.
  • the correction coefficient update unit 606 holds the correction coefficient calculated by the update correction coefficient calculation unit 605 in association with the input signal a. Further, after a sufficient time has elapsed, the correction coefficient updating unit 606 outputs the held correction coefficient to the output terminal 603, and updates the correction characteristic of the modulation signal correction unit 511.
  • the correction characteristic updating unit 503 can be realized using a digital signal processor (DSP).
  • DSP digital signal processor
  • the receiving unit 502 includes an analog-digital converter and a frequency conversion circuit.
  • an analog / digital converter that converts the input signal a into a digital signal is required.
  • a converter for converting the input signal a into a digital signal is not necessary.
  • LMS Least Mean Square
  • RMS Recursive Mean Square
  • the transmitter 500 receives from the output signal of the power amplifier 103 the input signal a input from the input unit 101 corresponding to the output signal, and the signal level. Based on the difference in amplitude and phase between the reception unit 502 that calculates a signal with the same signal phase and signal delay, and the signal calculated by the input signal a and the reception unit 502, the correction characteristics of the modulation signal correction unit 51 1 1 And a correction characteristic updating unit 503 for adjustment.
  • the correction characteristics (correction coefficient calculation characteristics) of the modulation signal correction unit 511 are appropriately set, that is, the power amplifier 103 Can be updated to reduce distortion contained in the output signal.
  • the apparatus can be mounted on a communication terminal apparatus and a base station apparatus in a mobile communication system, thereby providing a communication terminal apparatus, a base station apparatus, and a mobile communication system having the same operational effects as described above. be able to.
  • each functional block used in the description of each of the above embodiments is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
  • IC system LSI
  • super LSI super LSI
  • ultra LSI depending on the difference in power integration as LSI.
  • the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • Field programmable gate arrays (FPGAs) that can be programmed after LSI manufacturing and reconfigurable processors that can reconfigure the connection and settings of circuit cells inside the LSI may be used.
  • FPGAs Field programmable gate arrays
  • reconfigurable processors that can reconfigure the connection and settings of circuit cells inside the LSI may be used.
  • the transmission device of the present invention has the effects of reducing the cost by relaxing the requirements for the power supply voltage control unit and increasing the power efficiency, and particularly uses the EER method. This is useful as a transmission device.

Abstract

La présente invention concerne un dispositif de transmission permettant de réduire les coûts en atténuant la condition posée sur l'unité de commande de tension de courant et d'augmenter l'efficacité de puissance. Dans le dispositif de transmission (100), une unité de commande de tension de courant (106) commande la tension de courant appliquée à un amplificateur de courant selon une composante d'amplitude d'un signal de modulation et une unité de correction de signal d'amplitude (105) est agencée au stade d'entrée de l'unité de commande de tension (106) pour effectuer une correction afin de réduire la largeur de l'amplitude entre l'amplitude maximum et l'amplitude minimum de la composante d'amplitude après la correction. Cela réduit la largeur d'amplitude entre l'amplitude maximum et l'amplitude minimum de la composante d'amplitude et réduit la largeur de bande en retirant la composante à haute fréquence, atténuant de ce fait la condition concernant la plage dynamique et la bande passante pour l'unité de commande de tension de courant (106). Par conséquent, il est possible de réduire les coûts du dispositif de transmission (100) sur lequel est montée l'unité de commande de tension de courant (106) et d'augmenter l'efficacité de puissance.
PCT/JP2007/074043 2006-12-14 2007-12-13 Dispositif de transmission WO2008072700A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-337026 2006-12-14
JP2006337026 2006-12-14

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WO2008072700A1 true WO2008072700A1 (fr) 2008-06-19

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JP2010081406A (ja) * 2008-09-26 2010-04-08 Kyocera Corp 送信機および信号処理方法
JP2011010107A (ja) * 2009-06-26 2011-01-13 Fujitsu Ltd 送信装置、歪み補償装置及び歪み補償方法
WO2011108103A1 (fr) * 2010-03-04 2011-09-09 三菱電機株式会社 Module émetteur et dispositif d'antenne réseau à commande de phase
JP2011193153A (ja) * 2010-03-12 2011-09-29 Fujitsu Ltd 増幅器、増幅器制御方法及び送信機
WO2012086830A1 (fr) * 2010-12-20 2012-06-28 日本電気株式会社 Dispositif amplificateur et procédé destiné à le commander
JP2012519441A (ja) * 2009-03-02 2012-08-23 アルカテル−ルーセント 電力増幅器によって信号を増幅するための方法、電力増幅器システム、デバイス、コンピュータ・プログラム製品、およびそのデジタル記憶媒体
WO2013145748A1 (fr) * 2012-03-30 2013-10-03 日本電気株式会社 Amplificateur et procédé d'amplification
JP5446021B2 (ja) * 2010-07-27 2014-03-19 株式会社日立国際電気 増幅装置

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JP2005184273A (ja) * 2003-12-17 2005-07-07 Nec Corp 高出力増幅器
JP2005198109A (ja) * 2004-01-08 2005-07-21 Matsushita Electric Ind Co Ltd 送信装置
JP2006197537A (ja) * 2004-06-29 2006-07-27 Matsushita Electric Ind Co Ltd 歪補償回路

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JP2005184273A (ja) * 2003-12-17 2005-07-07 Nec Corp 高出力増幅器
JP2005198109A (ja) * 2004-01-08 2005-07-21 Matsushita Electric Ind Co Ltd 送信装置
JP2006197537A (ja) * 2004-06-29 2006-07-27 Matsushita Electric Ind Co Ltd 歪補償回路

Cited By (14)

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Publication number Priority date Publication date Assignee Title
JP2010081406A (ja) * 2008-09-26 2010-04-08 Kyocera Corp 送信機および信号処理方法
JP2012519441A (ja) * 2009-03-02 2012-08-23 アルカテル−ルーセント 電力増幅器によって信号を増幅するための方法、電力増幅器システム、デバイス、コンピュータ・プログラム製品、およびそのデジタル記憶媒体
US8536940B2 (en) 2009-03-02 2013-09-17 Alcatel Lucent Method for amplifying a signal by a power amplifier, power amplifier system, device, computer program product, and digital storage medium thereof
JP2011010107A (ja) * 2009-06-26 2011-01-13 Fujitsu Ltd 送信装置、歪み補償装置及び歪み補償方法
JP5349679B2 (ja) * 2010-03-04 2013-11-20 三菱電機株式会社 送信モジュールおよびフェーズドアレイアンテナ装置
WO2011108103A1 (fr) * 2010-03-04 2011-09-09 三菱電機株式会社 Module émetteur et dispositif d'antenne réseau à commande de phase
US8774737B2 (en) 2010-03-04 2014-07-08 Mitsubishi Electric Corporation Transmission module and phased array antenna apparatus
JP2011193153A (ja) * 2010-03-12 2011-09-29 Fujitsu Ltd 増幅器、増幅器制御方法及び送信機
JP5446021B2 (ja) * 2010-07-27 2014-03-19 株式会社日立国際電気 増幅装置
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WO2012086830A1 (fr) * 2010-12-20 2012-06-28 日本電気株式会社 Dispositif amplificateur et procédé destiné à le commander
US9106188B2 (en) 2010-12-20 2015-08-11 Nec Corporation Amplifying device and method for controlling the same
WO2013145748A1 (fr) * 2012-03-30 2013-10-03 日本電気株式会社 Amplificateur et procédé d'amplification
US9219448B2 (en) 2012-03-30 2015-12-22 Nec Corporation Amplifier and amplification method

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