WO2011157168A2 - Procédé pour transmettre un signal de fréquence radio et dispositif de station de base - Google Patents

Procédé pour transmettre un signal de fréquence radio et dispositif de station de base Download PDF

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Publication number
WO2011157168A2
WO2011157168A2 PCT/CN2011/075273 CN2011075273W WO2011157168A2 WO 2011157168 A2 WO2011157168 A2 WO 2011157168A2 CN 2011075273 W CN2011075273 W CN 2011075273W WO 2011157168 A2 WO2011157168 A2 WO 2011157168A2
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WIPO (PCT)
Prior art keywords
energy
signal
input
output signal
output
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PCT/CN2011/075273
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English (en)
Chinese (zh)
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WO2011157168A3 (fr
Inventor
肖宇翔
李珽
朱尔霓
吕劲松
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华为技术有限公司
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Priority to PCT/CN2011/075273 priority Critical patent/WO2011157168A2/fr
Priority to CN201180000857.8A priority patent/CN102217262B/zh
Publication of WO2011157168A2 publication Critical patent/WO2011157168A2/fr
Publication of WO2011157168A3 publication Critical patent/WO2011157168A3/fr

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    • 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
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion

Definitions

  • Embodiments of the present invention relate to communication technologies, and in particular, to a method for transmitting a radio frequency signal and a base station device. Background technique
  • PA Power Amplifier
  • predistortion technology digital or analog
  • PA can usually be used to correct the intermodulation signal corresponding to the RF output signal emitted by the PA.
  • the predistortion system is a correction system with feedback properties, it is necessary to obtain the Intermodulation Distortion (IMD) component in the RF output signal of the PA output through the feedback channel before obtaining the predistortion parameter.
  • the corrected signal can be input to the PA to correct the intermodulation component in the RF output signal of the PA output, resulting in an intermodulation component in the RF output signal that cannot be output to the initial phase of the PA (ie, the startup phase). Correction is made so that the linearity of the initial stage of the PA is poor.
  • Embodiments of the present invention provide a method for transmitting a radio frequency signal and a base station device for improving linearity in an initial stage of the PA.
  • An aspect of the present invention provides a method for transmitting a radio frequency signal, including:
  • the difference is greater than a preset energy threshold, wherein the energy of the useful component in the first RF output signal is less than the target energy of the RF output signal;
  • Controlling an increase in energy input to the second RF input signal of the PA according to a preset energy increment, so that the second RF output signal outputted after the PA is finally amplified by the second RF input signal is useful
  • the energy of the component is increased to a target energy of the radio frequency output signal, wherein the second radio frequency input signal is a signal corrected by the predistortion system;
  • the second RF output signal is transmitted and a portion of the coupled second RF output signal is fed back to the predistortion system.
  • Another aspect of the present invention provides another method for transmitting a radio frequency signal, including:
  • the radio frequency input signal is a signal corrected according to the initial predistortion parameter by a predistortion system configured with an initial predistortion parameter;
  • the RF output signal is transmitted and a portion of the RF output signal is coupled back to the predistortion system to update a predistortion parameter of the predistortion system.
  • Another aspect of the present invention provides a method for transmitting a radio frequency signal, including:
  • the control PA amplifies the input first RF input signal and outputs the first RF output signal to a preset RF load;
  • the second RF output signal is transmitted and a portion of the coupled second RF output signal is fed back to the predistortion system.
  • a base station device including:
  • a control unit configured to control energy of the first radio frequency input signal input to the PA, so that the PA is useful for the first radio frequency output signal after the first radio frequency input signal is amplified
  • the difference between the energy of the quantity and the energy of the intermodulation component is greater than a preset energy threshold, wherein the energy of the useful component in the first RF output signal is less than the target energy of the RF output signal, and according to the preset energy Incrementally, controlling an increase in energy of the second RF input signal input to the PA, so that the energy of the second RF output signal outputted after the PA is finally amplified by the second RF input signal is added to the RF output a target energy of the signal, wherein the second radio frequency input signal is a signal corrected by a predistortion system;
  • a coupling unit configured to couple a portion of the first RF output signal and/or the second RF output signal to the predistortion system; wherein the predistortion system is configured to feed back according to the coupling unit The signal performs predistortion processing on the input signal to obtain the second radio frequency input signal;
  • the transmitting unit is configured to transmit the first radio frequency output signal and/or the second radio frequency output signal.
  • the present invention further provides another base station device, including:
  • a predistortion system configured with initial predistortion parameters
  • a power amplifier ⁇ configured to amplify the input RF input signal, and output an RF output signal, wherein a difference between an energy of the useful component and an energy of the intermodulation component in the RF output signal is greater than a preset energy threshold,
  • the radio frequency input signal is a signal that is corrected according to the initial predistortion parameter by the predistortion system;
  • a transmitting unit configured to transmit the radio frequency output signal
  • a coupling unit configured to couple a portion of the RF output signal to the predistortion system to update a predistortion parameter of the predistortion system.
  • Another aspect of the present invention provides a further base station device, including:
  • a control unit configured to control, after the first RF input signal is amplified, output the first RF output signal to a preset RF load, and control the ⁇ to amplify the input second RF input signal and output a second
  • the RF output signal is sent to the antenna, where the second RF input signal is a signal corrected by the predistortion system; a coupling unit, configured to couple a portion of the first RF output signal and/or the second RF output signal to the predistortion system; wherein the predistortion system is configured to send a signal pair according to the coupling unit
  • the input signal is predistorted to obtain the second RF input signal, and the transmitting unit is configured to transmit the second RF output signal.
  • FIG. 1 is a schematic flowchart of a method for transmitting a radio frequency signal according to an embodiment of the present invention
  • FIG. 1B is a schematic diagram of a PA output signal in a method for transmitting a radio frequency signal according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of another method for transmitting a radio frequency signal according to another embodiment of the present invention.
  • FIG. 3 is a schematic flow chart of another method for transmitting a radio frequency signal according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a base station device according to another embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of another base station device according to another embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of still another base station device according to another embodiment of the present invention. detailed description
  • FIG. 1A is a schematic flowchart of a method for transmitting a radio frequency signal according to an embodiment of the present invention. As shown in FIG. 1A, the method for transmitting a radio frequency signal in this embodiment may include the following steps:
  • Step 101 Control an energy input to the first RF input signal of the PA, so that between the energy of the useful component and the energy of the intermodulation component of the first RF output signal output by the PA after amplifying the first RF input signal The difference is greater than a preset energy threshold;
  • the energy of the useful component in the first RF output signal outputted by the PA after amplifying the first RF input signal is less than the target energy of the RF output signal.
  • the energy of the useful component of the first RF output signal outputted by the PA after the input of the first RF input signal is less than the target energy of the RF output signal may include multiple implementation modes. For example: the energy of all carriers in the first RF output signal is less than the target energy of the carrier; for example: the energy of part of the carrier (one carrier or multiple carriers) in the first RF output signal is less than the target energy of the carrier, other carriers The energy is equal to the target energy of the carrier.
  • the specific energy amount can be determined through multiple experiments, so that the nonlinear distortion is small, so that the intermodulation component in the first RF output signal of the PA output can meet the intermodulation energy index requirement, that is, the first The difference between the energy of the useful component in the RF output signal and the energy of the intermodulation component is greater than a predetermined energy threshold.
  • the energy of the first RF input signal input to the PA may be controlled by controlling the energy of the baseband signal transmitted by the baseband module; or the first RF input of the input PA may be controlled by controlling the energy output by the variable gain amplifier.
  • the energy of the signal is not limited in this embodiment.
  • Step 102 The first RF output signal is transmitted, and a part of the first RF output signal is coupled to the predistortion system. For example: a portion of the first RF output signal coupled to the predistortion system is coupled through the feedback channel.
  • Step 103 Control, according to a preset energy increment, an increase in energy of the second RF input signal input to the PA, so that the second RF output signal outputted after the PA is finally amplified by the second RF input signal is useful.
  • the energy of the component is increased to the target energy of the above RF output signal;
  • the second RF input signal is a signal corrected by the predistortion system.
  • the intermodulation component in the second RF output signal outputted by the PA after the second RF input signal is amplified may satisfy the intermodulation energy index requirement, that is, the second RF
  • the difference between the energy of the useful component in the output signal and the energy of the intermodulation component is greater than a pre-set energy threshold.
  • the energy of the baseband signal transmitted by the baseband module may be controlled, and the energy of the second RF input signal input to the PA may be controlled according to a preset energy increment; or may be controlled by controlling the output of the variable gain amplifier.
  • the energy of the signal is controlled to increase the energy of the second RF input signal input to the PA according to the preset energy increment.
  • This embodiment does not limit this. In this way, the PA can output a gradually increasing RF output signal until the energy of the useful component of the RF output signal of the PA output is increased to the target energy of the RF output signal that satisfies the requirements of the communication system.
  • the predistortion system processes the signal (baseband signal or radio frequency signal), and may specifically use the predistortion system to obtain the preamble obtained by the first radio frequency output signal after the first radio frequency input signal is amplified according to the PA acquired through the feedback channel.
  • Distortion parameters, and/or pre-distortion parameters obtained by the second RF output signal outputted by the PA obtained by the PA after the second RF input signal is amplified by the feedback channel the signal is corrected, thereby correcting the second RF input signal So that the nonlinear distortion is small, so that the intermodulation component in the second RF output signal of the PA output can meet the intermodulation energy index requirement, that is, the energy of the useful component and the energy of the intermodulation component in the second RF output signal.
  • the difference between the differences is greater than the preset energy threshold.
  • the energy of the second RF input signal may be gradually adjusted, or may be adapted according to the condition of the second RF output signal, for example: Up and down And further up, this embodiment does not limit this.
  • Step 104 Transmit the second RF output signal, and couple a portion of the second RF output signal to the predistortion system.
  • the foregoing predistortion system may be a Digital Pre Distortion (DPD) system.
  • DPD Digital Pre Distortion
  • the foregoing predistortion system may also be an Analog Pre Distortion (APD) system.
  • APD Analog Pre Distortion
  • the PA inputs an RF input signal with an energy level of 1 (eg, more than 30 dBc from the target energy of the RF output signal).
  • an energy level of 1 eg, more than 30 dBc from the target energy of the RF output signal.
  • the nonlinear distortion of the PA is small, and the PA is amplified by the RF input signal of the energy level 1.
  • the intermodulation component in the output RF output signal can meet the intermodulation energy index requirement.
  • the predistortion system obtains the RF output signal that is amplified by the PA after the RF input signal of the energy level 1 is obtained through the feedback channel, and according to the RF output signal, the predistortion parameter is obtained, and the RF output signal of the PA output can be obtained.
  • the intermodulation component is further improved.
  • the PA inputs the RF input signal of the energy level 2 (for example, the energy is increased by 2 dB) processed by the predistortion system.
  • the nonlinear distortion of the PA is increased as before, but since the RF input signal of the energy level 2 is passed
  • the predistortion system is calibrated. Therefore, the intermodulation component of the RF output signal output by the PA after amplifying the RF input signal of the energy level 2 can meet the intermodulation energy index requirement.
  • the predistortion system obtains the RF output signal that the PA outputs after the RF input signal of the energy level 2 is amplified through the feedback channel, and obtains the predistortion parameter according to the RF output signal, which can be used in the RF output signal of the PA output.
  • the intermodulation component is further improved.
  • the PA inputs the RF input signal of the energy level 3 (for example, the energy is increased by 2 dB) processed by the predistortion system.
  • the nonlinear distortion of the PA is increased as before, but since the RF input signal of the energy level 3 is passed
  • the predistortion system is calibrated.
  • the intermodulation component of the RF output signal output by the PA after amplifying the RF input signal of the energy level 3 can meet the intermodulation energy index requirement.
  • the predistortion system obtains the RF output signal after the PA RF signal of the energy level 3 is amplified by the feedback channel, and obtains the predistortion parameter according to the RF output signal, which can be used in the RF output signal of the PA output.
  • the intermodulation component is further improved.
  • the energy of the RF input signal of the PA input is gradually increased until the PA converts the input RF input signal and the energy of the output RF output signal increases to the target energy of the RF output signal.
  • the nonlinear distortion of the PA Further increase, but the baseband signal or the radio frequency signal corresponding to the RF input signal of the PA input is corrected by the predistortion system (it can also be understood that the RF input signal of the PA input is corrected by the predistortion system). Therefore, the intermodulation component of the RF output signal output by the PA after amplifying the input RF input signal can meet the intermodulation energy index requirement. In this way, the intermodulation component in the output RF output signal of the initial phase of the PA (ie, the startup phase) can be corrected, thereby improving the linearity of the initial phase of the PA.
  • the time T can be maintained for the predistortion system to calculate the predistortion parameter, and the time T can be determined by the running speed of the predistortion system.
  • the predistortion system by controlling the energy of the RF input signal of the initial input PA, the predistortion system obtains the predistortion parameter, and gradually controls the energy increase of the RF input signal processed by the predistortion system of the subsequent input PA, thereby achieving
  • the intermodulation component in the RF output signal output from the initial phase of the PA ie, the startup phase
  • FIG. 2 is a schematic flowchart of another method for transmitting a radio frequency signal according to another embodiment of the present invention.
  • the method for transmitting a radio frequency signal in this embodiment may include the following steps: Step 201: Amplify the input RF input signal by the PA, and output a radio frequency output signal, where a difference between an energy of the useful component and an energy of the intermodulation component is greater than a preset energy threshold;
  • the radio frequency input signal is a signal corrected by a predistortion system configured with an initial predistortion parameter.
  • the initial predistortion parameters of the predistortion system are pre-configured, so that the intermodulation components in the RF output signal of the PA output can meet the requirements of the intermodulation energy index, that is, the energy and mutual energy of the useful components in the RF output signal.
  • the difference between the energy of the component is greater than a preset energy threshold.
  • the initial predistortion parameters can be obtained by transmitting the RF output power of the target energy and the corresponding intermodulation signal in the production equipment phase.
  • Step 202 Transmit the radio frequency output signal, and couple a portion of the radio frequency output signal to the predistortion system to update a predistortion parameter of the predistortion system.
  • a part of the above RF output signal is coupled to the pre-distortion system through the feedback channel.
  • the foregoing predistortion system may be a Digital Pre Distortion (DPD) system.
  • DPD Digital Pre Distortion
  • the foregoing predistortion system may also be an Analog Pre Distortion (APD) system.
  • APD Analog Pre Distortion
  • the intermodulation component in the RF output signal outputted by the PA after the RF input signal processed by the predistortion system configured with the initial predistortion parameter can satisfy the intermodulation energy index requirement, and can realize the initial PA.
  • the intermodulation component of the RF output signal output during the phase ie, the startup phase is corrected to improve the linearity of the initial phase of the PA.
  • FIG. 3 is a schematic flow chart of another method for transmitting a radio frequency signal according to another embodiment of the present invention. As shown in FIG. 3, the method for transmitting a radio frequency signal in this embodiment may include the following steps:
  • Step 301 The control PA amplifies the input first RF input signal and outputs the first RF output signal to a preset RF load;
  • Step 302 Coupling a portion of the first RF output signal to the predistortion system; for example: coupling, by the feedback channel, a portion of the first RF output signal to the pre-depreciation system.
  • Step 303 Control the PA to amplify the input second RF input signal and output the second RF output signal to the antenna.
  • the second RF input signal is a signal corrected by the predistortion system.
  • Step 304 Transmit the second RF output signal, and couple a portion of the second RF output signal to the predistortion system.
  • a portion of the second RF output signal coupled to the pre-distortion system is fed back through the feedback channel.
  • the predistortion system corrects the signal (baseband signal or radio frequency signal) according to the predistortion parameter obtained by the first radio frequency output signal outputted by the PA obtained by the PA obtained through the feedback channel after the first radio frequency input signal is amplified.
  • the second RF input signal is corrected to make the nonlinear distortion smaller, so that the intermodulation component in the second RF output signal of the PA output can meet the intermodulation energy index requirement, that is, in the second RF output signal.
  • the difference between the energy of the useful component and the energy of the intermodulation component is greater than a pre-set energy threshold.
  • the foregoing predistortion system may be a Digital Pre Distortion (DPD) system.
  • DPD Digital Pre Distortion
  • the foregoing predistortion system may also be an Analog Pre Distortion (APD) system.
  • APD Analog Pre Distortion
  • the predistortion system by controlling the RF output signal of the initial PA output to a preset RF load, the predistortion system obtains the predistortion parameter, and controls the RF output signal of the subsequent PA output to the antenna, which can implement the initial stage of the PA ( That is, the intermodulation component in the output RF output signal is corrected in the startup phase, thereby improving the linearity of the initial stage of the PA.
  • FIG. 4 is a schematic structural diagram of a base station device according to another embodiment of the present invention.
  • the base station device in this embodiment may include a control unit 41, a coupling unit 42, and a transmitting unit 43.
  • the control unit 41 is configured to control the energy of the first radio frequency input signal input to the power amplifier PA to enable the PA to amplify the useful component of the first radio frequency output signal after the first radio frequency input signal is amplified.
  • the difference between the energy of the intermodulation component and the energy of the intermodulation component is greater than a preset energy threshold, wherein the energy of the useful component in the first radio frequency output signal is less than the target energy of the radio frequency output signal, and according to the preset energy increment, Controlling an increase in energy input to the second RF input signal of the PA, such that the energy of the second RF output signal output after the PA is finally amplified by the second RF input signal is increased to a target of the RF output signal Energy, wherein the second radio frequency input signal is a signal corrected by a predistortion system; the coupling unit 42 is configured to couple a portion of the first radio frequency output signal and/or the second radio frequency output signal to the a predistortion system; wherein the predistortion system is configured to transmit according to a signal fed back by the coupling unit The incoming signal is predistorted to obtain the second RF input signal; the transmitting unit 43 is configured to transmit the first RF output signal and/or the second RF output signal.
  • the energy of the useful component of the first RF output signal outputted by the PA after the input of the first RF input signal is less than the target energy of the RF output signal may include various implementation manners. For example: the energy of all carriers in the first RF output signal is less than the target energy of the carrier; for example: the energy of part of the carrier (one carrier or multiple carriers) in the first RF output signal is less than the target energy of the carrier, other carriers The energy is equal to the target energy of the carrier.
  • the method of the foregoing embodiment of the present invention may be implemented by the base station device provided by the embodiment of the present invention. Now.
  • control unit 41 in this embodiment may specifically control the energy of the first radio frequency input signal input to the PA by controlling the energy of the baseband signal transmitted by the baseband module.
  • control unit 41 in this embodiment may specifically control the energy of the first RF input signal input to the PA by controlling the energy of the signal output by the variable gain amplifier.
  • control unit 41 in this embodiment may specifically control the energy of the second radio frequency input signal input to the PA according to the preset energy increment by controlling the energy of the baseband signal transmitted by the baseband module.
  • control unit 41 in this embodiment may further control the energy of the second RF input signal input to the PA according to the preset energy increment by controlling the energy of the signal output by the variable gain amplifier.
  • the intermodulation component in the second RF output signal outputted by the PA after the second RF input signal is amplified may satisfy the intermodulation energy index requirement, that is, the second RF output.
  • the difference between the energy of the useful component in the signal and the energy of the intermodulation component is greater than a pre-set energy threshold.
  • the foregoing predistortion system may be a Digital Pre Distortion (DPD) system.
  • DPD Digital Pre Distortion
  • the foregoing predistortion system may also be an Analog Pre Distortion (APD) system.
  • APD Analog Pre Distortion
  • the energy of the RF input signal of the initial input PA is controlled by the control unit, so that the predistortion system obtains the predistortion parameter, and gradually controls the energy increase of the RF input signal processed by the predistortion system of the subsequent input PA,
  • the intermodulation component in the RF output signal outputted from the initial stage of the PA ie, the startup phase
  • is corrected thereby improving the linearity of the initial stage of the PA.
  • FIG. 5 is a schematic structural diagram of another base station device according to another embodiment of the present invention.
  • the base station device in this embodiment may include a predistortion system 51, a power amplifier 52, and a transmitting. Unit 53 and coupling unit 54.
  • the predistortion system 51 is configured with an initial predistortion parameter;
  • the power amplifier 52 is configured to amplify the input radio frequency input signal, and output an RF output signal, the energy of the useful component and the energy of the intermodulation component in the radio frequency output signal.
  • the difference between the two is greater than a preset energy threshold, wherein the radio frequency input signal is a signal corrected by the predistortion system 51 according to the initial predistortion parameter; the transmitting unit 53 is configured to transmit the radio frequency output signal; A portion for coupling the RF output signal is fed back to the predistortion system to update a predistortion parameter of the predistortion system.
  • the method of the foregoing embodiment of the present invention can be implemented by the base station device provided by the embodiment of the present invention.
  • the foregoing predistortion system may be a Digital Pre Distortion (DPD) system.
  • DPD Digital Pre Distortion
  • the foregoing predistortion system may also be an Analog Pre Distortion (APD) system.
  • APD Analog Pre Distortion
  • the intermodulation component of the RF output signal outputted by the power amplifier after the RF input signal processed by the predistortion system configured with the initial predistortion parameter can meet the intermodulation energy index requirement, and the power can be achieved.
  • the intermodulation component of the RF output signal output from the initial stage of the amplifier ie, the start-up phase
  • FIG. 6 is a schematic structural diagram of still another base station device according to another embodiment of the present invention.
  • the base station device of this embodiment may include a control unit 61, a coupling unit 62, and a transmitting unit 63.
  • the control unit 61 is configured to control the PA to output the first RF output signal to the preset RF load after amplifying the input first RF input signal, and control the PA to output the second RF input signal after being amplified.
  • the second RF input signal is a signal corrected by a predistortion system
  • the coupling unit 62 is configured to couple the first RF output signal and/or the second RF output signal Partially fed back to the predistortion system
  • the predistortion system is configured to input an input signal according to a signal fed back by the coupling unit
  • Predistortion processing is performed to obtain the second radio frequency input signal
  • the transmitting unit 63 is configured to transmit the second radio frequency output signal.
  • the method of the foregoing embodiment of the present invention can be implemented by the base station device provided by the embodiment of the present invention.
  • the foregoing predistortion system may be a Digital Pre Distortion (DPD) system.
  • DPD Digital Pre Distortion
  • the foregoing predistortion system may also be an Analog Pre Distortion (APD) system.
  • APD Analog Pre Distortion
  • the RF output signal of the initial PA output is controlled by the control unit to a preset RF load, so that the predistortion system obtains the predistortion parameter, and controls the RF output signal of the subsequent PA output to the antenna, which can implement the initial PA.
  • the intermodulation component of the RF output signal output during the phase ie, the startup phase
  • the method provided in the embodiment of the present invention can also be applied to other communication fields, such as radar or satellite communication, which may not be limited herein.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé pour transmettre un signal de fréquence radio (RF) et un dispositif de station de base. Le procédé comprend : la régulation de l'énergie d'un premier signal d'entrée RF d'un amplificateur de puissance (PA), la transmission d'un premier signal de sortie RF, le couplage d'une partie du premier signal de sortie RF et son renvoi à un système de prédistorsion, pour réguler l'augmentation d'énergie d'un second signal d'entrée RF entré sur le PA selon une incrémentation d'énergie prédéfinie. Le procédé peut réaliser l'adaptation pour la composante de distorsion d'inter-modulation (IMD) dans le signal de sortie RF sorti du PA dans une phase initiale (qui est une phase de démarrage), ce qui améliore la linéarité du PA dans la phase initiale.
PCT/CN2011/075273 2011-06-03 2011-06-03 Procédé pour transmettre un signal de fréquence radio et dispositif de station de base WO2011157168A2 (fr)

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PCT/CN2011/075273 WO2011157168A2 (fr) 2011-06-03 2011-06-03 Procédé pour transmettre un signal de fréquence radio et dispositif de station de base
CN201180000857.8A CN102217262B (zh) 2011-06-03 2011-06-03 射频信号的发射方法及基站设备

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CN107017954B (zh) * 2017-02-16 2020-10-23 广东顺德中山大学卡内基梅隆大学国际联合研究院 基于时隙控制的自适应无线信号与能量复合传输采样系统
CN112994721B (zh) * 2019-11-29 2022-07-22 华为技术有限公司 一种多通道天线校正装置、阵列天线及通信设备

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Publication number Priority date Publication date Assignee Title
US20050069050A1 (en) * 2003-09-30 2005-03-31 Lei Ding Frequency based modulator compensation
CN102014473A (zh) * 2010-12-09 2011-04-13 中兴通讯股份有限公司 功率校准控制方法及装置

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