WO2013097360A1 - Procédé et appareil de protection d'un amplificateur de puissance contre des anomalies - Google Patents

Procédé et appareil de protection d'un amplificateur de puissance contre des anomalies Download PDF

Info

Publication number
WO2013097360A1
WO2013097360A1 PCT/CN2012/072512 CN2012072512W WO2013097360A1 WO 2013097360 A1 WO2013097360 A1 WO 2013097360A1 CN 2012072512 W CN2012072512 W CN 2012072512W WO 2013097360 A1 WO2013097360 A1 WO 2013097360A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
module
abnormality
digital signal
power
Prior art date
Application number
PCT/CN2012/072512
Other languages
English (en)
Chinese (zh)
Inventor
戴征坚
宁东方
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2013097360A1 publication Critical patent/WO2013097360A1/fr

Links

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
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • 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
    • H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only

Definitions

  • the present invention relates to the field of digital signal processing, and more particularly to an abnormal protection method and apparatus for a power amplifier.
  • the power amplifier is widely used in various systems such as Global System for Mobile Communications (GSM), Personal Handheld Telephone System (PHS), Code Division Multiple Access (CDMA) and Wideband Code Division Multiple Access (WCDMA).
  • GSM Global System for Mobile Communications
  • PHS Personal Handheld Telephone System
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • the function of the power amplifier is to amplify the transmission signal of the base transceiver station, and then output the amplified radio frequency signal to the antenna feeder unit of the base station, and radiate into the air through the base station antenna to provide a reliable wireless communication signal for the mobile user terminal.
  • the power amplifier In the wireless base station system, in order to improve the coverage of the device and the efficiency of the power amplifier, and reduce the heat consumption of the base station equipment, the power amplifier often works at high power, and the working environment of the actual equipment is very complicated.
  • an abnormality occurs in the input of the power amplifier due to some sudden cause (such as a high-power signal or a wide-spectrum signal)
  • Abnormal performance or burnout of the power amplifier will increase the equipment maintenance cost of the base station equipment provider on the one hand, and affect the normal communication of the equipment on the other hand, thereby affecting the ability of the mobile operator to provide normal services to the user.
  • Embodiments of the present invention provide an abnormal protection method and apparatus for a power amplifier to solve the problem of preventing performance abnormality or burnout of the power amplifier without increasing the cost and volume of the amplifier.
  • the following technical solutions are used:
  • An embodiment of the present invention provides an abnormality protection device for a power amplifier, including a signal generator, a digital-to-analog conversion (DAC) module, a modulation module, and a power amplifier (PA) connected in sequence, and the device further includes a signal generator And a signal protector between the DAC module and a signal monitor between the signal generator and the signal protector, wherein:
  • the signal monitor is configured to: perform real-time monitoring on the digital signal output by the signal generator, and when detecting that the digital signal is abnormal, generate a signal abnormality indicating signal, and send the signal abnormality to the signal protector Indication signal
  • the signal protector is configured to: process the digital signal according to the signal abnormality indication signal sent by the signal monitor, and output a weighted processed result to the DAC module.
  • the signal monitor comprises a power calculation module, a filter processing module, a power spectrum estimation module, an error calculation module and a decision module, wherein:
  • the power calculation module is configured to: calculate an instantaneous power of the digital signal and output the same;
  • the filter processing module is configured to: perform filtering processing on the instantaneous power output by the power calculation module to obtain an average power of the digital signal, and then output ;
  • the power spectrum estimation module is configured to: estimate a power afterword output of the digital signal; the error calculation module is configured to: calculate a frequency domain error according to a power spectrum output by the power language estimation module and a preset reference spectrum
  • the output module is configured to: compare the outputs of the power calculation module, the filter processing module, and the error calculation module with a pre-configured decision threshold to determine the digital signal in the time domain or frequency After an abnormality occurs in the domain, a signal abnormality indicating signal is generated, and the signal abnormality indicating signal is sent to the signal protector.
  • the determining module is configured to: after determining that the digital signal has a frequency domain error according to the output of the error calculation module and the frequency domain decision threshold, generate a signal abnormality indication signal, and send the signal to the signal protector Signal abnormality indication signal; or
  • the error calculation module is configured to calculate the frequency domain error using the following formula:
  • P(k) and E(n) are power spectrum and frequency domain error respectively
  • k is the maximum frequency sequence
  • a is the adjustment factor
  • Pmm P max is the power spectrum minimum and maximum threshold respectively
  • P is the power spectrum minimum and maximum threshold respectively
  • E mm E max is the minimum and maximum of the frequency domain error, respectively.
  • the signal protector comprises a delay module, a weight window module, a smoothing module and a selection module, wherein:
  • the delay module is configured to: delay and process the digital signal output by the signal generator;
  • the weight window module is configured to: generate a weighting window sequence according to the signal abnormality indication signal sent by the signal monitor;
  • the smoothing module is configured to: after the signal abnormality indication signal sent by the signal monitor and the weighting window sequence generated by the weight window module, perform smoothing processing on the digital signal; and the selection module is configured to: The signal abnormality indication signal sent by the signal monitor selects between an output of the delay module and an output of the smoothing module, and outputs a selection result to the DAC module.
  • the smoothing module is configured to perform smoothing processing on the digital signal according to a signal abnormality indication signal sent by the signal monitor and a weighting window sequence generated by the weight window module according to the following manner:
  • the signal abnormality indication signal is low level, the digital signal is not processed, and when the signal abnormality indication signal is a rising edge, the digital signal is positively added.
  • the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
  • the smoothing module is configured to process the digital signal with the following formula:
  • x(n) and s(n) are respectively the digital signal before smoothing and the smoothed digital signal
  • w(n) is the weight window
  • L is the weight window length
  • Fig is the signal abnormality indicating signal
  • Posedge is the rising edge
  • Negedge is the falling edge.
  • An embodiment of the present invention further provides a method for abnormal protection of a power amplifier, the method comprising: performing delay processing on a digital signal to be input to a power amplifier;
  • the smoothed signal and the delayed signal are selected and output according to the signal abnormality indication signal.
  • the digital signal to be input to the power amplifier is monitored in real time, and when the abnormality of the digital signal is detected, the step of generating the signal abnormality indicating signal includes:
  • the instantaneous power, the average power, and the frequency domain error are respectively compared with a pre-configured decision threshold to determine that the digital signal generates a signal abnormality signal after an abnormality occurs in the time domain or the frequency domain.
  • the step of smoothing the digital signal according to the signal abnormality indication signal comprises:
  • the above-mentioned power amplifier abnormality protection method and device perform real-time monitoring on the digital signal of the power amplifier.
  • the digital signal of the power amplifier is abnormal, the input signal is subjected to pre-digital signal processing in the digital domain, thereby preventing the power amplifier from exhibiting abnormal performance. Or burned.
  • the abnormal monitoring of the power amplifier is performed in the digital domain, it can be implemented by software programming, thereby improving the achievability and protection of the power amplifier abnormal protection.
  • FIG. 1 is a schematic structural diagram of an abnormality protection device of a power amplifier according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an embodiment of a signal monitor in the device shown in FIG.
  • FIG. 3 is a schematic structural view of an embodiment of a signal protector in the apparatus shown in FIG. 1;
  • FIG. 4 is a schematic structural diagram of an abnormality protection device for a power amplifier according to an application example of the present invention
  • FIG. 5 is a flow chart of an abnormality protection method for a power amplifier according to an embodiment of the present invention.
  • the signal generator of Figure 1 is a single carrier or multi-carrier signal that is transmitted by the baseband pool and subjected to other digital signal processing (including shaping, rate conversion, etc.).
  • the power amplifier (PA) power-amplifies the modulated RF signal. If there is no amplifier protection transposition in the link, when the signal generator includes a digital signal processing link that has some abnormality, such as an instantaneous high-power signal or Sudden loss of signal, etc., which may cause the performance of the power amplifier to permanently drop or burn out in an instant.
  • the abnormality protection device of the power amplifier of the embodiment of the present invention includes: a signal generator 11, a signal monitor 12, a signal protector 13, a digital-to-analog conversion (DAC) module 14, a modulation module 15, and a PA 16
  • the above-mentioned signal monitor 12 and signal protector 13 are two newly added modules in the embodiment of the present invention.
  • the signal generator 11 is configured to: output the generated digital signal
  • the signal monitor 12 is configured to: perform real-time monitoring on the digital signal output by the signal generator 11 , and generate a signal abnormality indication signal when the digital signal is detected to be abnormal, and send the signal to the signal protector 13 The signal abnormality indication signal;
  • the signal protector 13 is configured to: perform weighting processing on the digital signal according to the signal abnormal indication signal sent by the signal monitor, and output a weighted processed result to the DAC module 14;
  • the DAC module 14 is configured to: convert a digital signal into an analog signal
  • the modulation module 15 is configured to: modulate an analog signal output by the DAC module to a radio frequency segment;
  • the PA 16 is configured to: power amplify the input analog signal.
  • the signal monitor 12 may further include a power calculation module 121, a filter processing module 122, a power language estimation module 123, an error calculation module 124, and a decision module 125.
  • the specific structure is as shown in FIG. 2, where:
  • the power calculation module 121 is configured to: calculate an instantaneous power of the digital signal as the decision information of the transient abnormality of the input signal in the current domain;
  • the filter processing module 122 is configured to: filter the instantaneous power output by the power calculation module 121 as the decision information of the time domain long-term abnormality of the input signal;
  • y(n) x(n) - x(n - k) + y(n - 1) ( 3 )
  • x(n), y(n) are the input and output of the filter processing module, respectively;
  • n is a time series;
  • k is the signal delay amount;
  • N is an adjustment factor.
  • the power language estimation module 123 is configured to: estimate a power spectrum of the digital signal for subsequent error calculation;
  • x(n) and P(k) are the input and output of the power language estimation module respectively; k is the frequency sequence; N is the FFT point number; h is the truncation sequence; M is the block length; L is the normalization factor.
  • the error calculation module 124 is configured to: calculate a frequency domain error according to a power spectrum output by the power language estimation module and a preset reference spectrum (the reference spectrum is determined by configuration information), and calculate a frequency domain error as an input signal frequency domain abnormality Decision information;
  • the error calculation method used by the error calculation module includes but is not limited to the following manners:
  • P(k) and E(n) are power spectrum and frequency domain error respectively
  • k is the maximum frequency sequence
  • ⁇ is the adjustment factor
  • Pmm and P max are the power spectrum minimum and maximum threshold respectively
  • E mm and E max are the minimum and maximum values of the frequency domain error, respectively.
  • the decision module 125 is configured to: compare the output of the power calculation module 121, the filter processing module 122, and the error calculation module 124 with a pre-configured decision threshold, respectively, to determine After the digital signal is abnormal in the time domain or the frequency domain, a signal abnormality indicating signal is generated, and the signal abnormality indicating signal is sent to the signal protector 13.
  • the determining module is configured to: after determining that the digital signal has a frequency domain error according to the output of the error calculating module 124 and the frequency domain determining threshold, generate a signal abnormality indicating signal, and send the signal abnormality indicating signal to the signal protector 13
  • the signal abnormality indication signal is generated; or, after determining the time domain error of the digital signal according to the output of the power calculation module 121 and the time domain instantaneous decision threshold, a signal abnormality indication signal is generated, and is sent to the signal protector 13
  • the signal abnormality indication signal is generated according to the output of the filter processing module 122 and the time domain long-term determination threshold, and the signal abnormality indication signal is generated, and the signal protection device is generated. 13 Send the signal anomaly indication signal.
  • the signal protector 13 may further include a delay module 131, a weight window module 132, a smoothing module 133, and a selection module 134. The specific structure is shown in FIG. 3, where:
  • the delay module 131 is configured to: delay processing the digital signal output by the signal generator 11, and the delay size can be configured by software according to service requirements;
  • the weight window module 132 is configured to: generate a suitable weighting window sequence according to the signal abnormality indication signal, 1" column ⁇ port Blackman window, Kaiser window and Hamming window, etc., but not in the above window function;
  • the smoothing module 133 is configured to: smooth the digital signal according to the signal abnormality indication signal output by the signal monitoring module;
  • the smoothing processing method used by the smoothing module includes but is not limited to the following manners:
  • x(n), s(n) are the digital signals before smoothing and after smoothing
  • the digital signal w(n) is the weight window
  • L is the weight window length
  • Fig is the signal anomaly indication signal
  • n is the time series
  • Posedge is the rising edge
  • Negedge is the falling edge.
  • the smoothing module is configured to follow the signal abnormality finger output by the signal monitoring module in the following manner Signaling, smoothing the digital signal: when the signal abnormality indicating signal is low level, the digital signal is not processed, and when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted Or, when the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
  • the selection module 134 is set to: select between the delay module output and the smoothing module output according to the signal abnormality indication signal, and output the final abnormal protection signal.
  • the signal generator 11 may include: a baseband pool module, a shaping filter and a digital up-conversion module, and an intermediate frequency algorithm processing module; wherein, the baseband pool module is configured to: generate a baseband digital signal; the shaping filter and the digital up-conversion module are configured to : Performing pulse shaping and digital up-conversion processing on the baseband digital signal to obtain an intermediate frequency digital signal; the intermediate frequency algorithm processing module is configured to: perform other intermediate frequency processing on the intermediate frequency digital signal (such as equalization, peak clipping, predistortion, and quadrature compensation, etc.); of course,
  • the antenna module can be connected, and the antenna module transmits the power amplified signal to the air.
  • the processing mode of other modules is the same as that of the corresponding module in Figure 1, and will not be described here.
  • the abnormality protection device of the above power amplifier is not limited to only protecting the power amplifier in the communication system transmitter, and is still applicable to other systems involving the power amplification circuit.
  • the abnormal protection device of the above power amplifier monitors the input signal of the power amplifier in real time in the digital domain, and performs real-time digital signal processing on the abnormal input signal, thereby improving the anti-burning capability of the power amplifier, making the device more suitable for power amplifier applications. A more complex environment.
  • the embodiment of the invention further provides a method for abnormal protection of a power amplifier, the method comprising: Step 1: delay processing a digital signal to be input to the power amplifier;
  • Step 2 performing real-time monitoring on the digital signal to be input to the power amplifier, and when detecting that the digital signal is abnormal, generating a signal abnormality indicating signal; and smoothing the digital signal according to the signal abnormality indicating signal;
  • the step of real-time monitoring the digital signal to be input to the power amplifier, when detecting that the digital signal is abnormal, the step of generating a signal abnormality indicating signal includes: calculating an instantaneous power of the digital signal; Instantaneous power is filtered to obtain the digital signal Average power; estimating a power spectrum of the digital signal, calculating a frequency domain error according to the power spectrum and a preset reference spectrum; respectively, respectively, the instantaneous power, the average power, and the frequency domain error and the pre-configured The decision threshold is compared to determine that the digital signal generates an abnormal signal indication signal after an abnormality occurs in the time domain or the frequency domain.
  • the step of smoothing the digital signal according to the signal abnormality indication signal includes: generating a weighting window sequence according to the signal abnormality indication signal; when the signal abnormality indication signal is a low level, The digital signal is not processed; when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted; when the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
  • Step 3 Select and output the signal after the weighting process and the signal after the delay processing according to the signal abnormality indication signal.
  • a signal is selected between the delayed signal and the smoothed signal according to the signal abnormality indicating signal as the final output digital signal.
  • the power amplifier abnormality protection method is described by taking the protection device of the power amplifier shown in FIG. 4 as an example. As shown in FIG. 5, the method includes:
  • Step 501 The baseband digital signal undergoes necessary digital signal processing
  • Step 502 processing the processed digital signal Performing abnormality monitoring to generate a signal abnormality indicating signal
  • Step 503 The signal protection module weights the input signal according to different states of the signal abnormality indicating signal, and finally outputs the abnormally protected signal to the DAC to complete the abnormality of the power amplifier. Protection.
  • the digital signal processing uses sequential processing, and does not involve any feedback processing module, so that it is convenient to implement in an actual hardware system.
  • the abnormal protection method of the power amplifier described above uses the power and power language information to monitor the abnormal signal in real time, and when the input signal is abnormal, the abnormal input signal is smoothed in real time, thereby improving the anti-burning of the power amplifier against the abnormal input signal. ability.
  • the above-mentioned power amplifier abnormality protection method and device perform real-time monitoring on the digital signal of the power amplifier.
  • the digital signal of the power amplifier is abnormal
  • the input signal is subjected to pre-digital signal processing in the digital domain, thereby preventing the power amplifier from exhibiting abnormal performance. Or burned.
  • the abnormal monitoring of the power amplifier is performed in the digital domain, it can be implemented by software programming, thereby improving the achievability and protection of the power amplifier abnormal protection. Therefore, the present invention has strong industrial applicability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

La présente invention concerne un procédé et un appareil conçus pour protéger un amplificateur de puissance contre des anomalies. L'appareil de l'invention comprend un générateur de signal, un dénumériseur, un modulateur, et un amplificateur de puissance montés en série. L'appareil comprend également, d'une part un protecteur de signal situé entre le générateur de signal et le dénumériseur, et d'autre part une logique de surveillance du signal située entre le générateur de signal et le protecteur de signal. La logique de surveillance du signal est configurée de façon, d'abord à surveiller en temps réel le signal numérique sortant du générateur de signal, ensuite à générer un signal d'indication d'anomalie du signal quand l'anomalie du signal numérique est repérée, et enfin à envoyer au protecteur de signal un signal d'indication d'anomalie. Le protecteur de signal est configuré de façon, non seulement à traiter le signal numérique en fonction du signal d'indication d'anomalie du signal envoyé depuis la logique de surveillance du signal, mais aussi à produire en sortie, à destination du dénumériseur, le résultat du traitement de pondération. Le procédé et l'appareil selon l'invention permettent d'empêcher effectivement l'amplificateur de puissance de fonctionner anormalement ou de griller.
PCT/CN2012/072512 2011-12-30 2012-03-19 Procédé et appareil de protection d'un amplificateur de puissance contre des anomalies WO2013097360A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110455824.4 2011-12-30
CN201110455824.4A CN103187936B (zh) 2011-12-30 2011-12-30 功率放大器的异常保护方法和装置

Publications (1)

Publication Number Publication Date
WO2013097360A1 true WO2013097360A1 (fr) 2013-07-04

Family

ID=48678926

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/072512 WO2013097360A1 (fr) 2011-12-30 2012-03-19 Procédé et appareil de protection d'un amplificateur de puissance contre des anomalies

Country Status (2)

Country Link
CN (1) CN103187936B (fr)
WO (1) WO2013097360A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109561299B (zh) * 2018-11-27 2020-05-01 河南亿秒电子科技有限公司 一种用于监控摄像机故障智能分析设备
CN113809993B (zh) * 2021-11-18 2022-03-04 成都市卫莱科技有限公司 一种针对功放的工作信号监测控制装置、系统及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080260185A1 (en) * 2007-04-18 2008-10-23 Ching Hung Tseng Method And Apparatus For Automatically Detecting Audio Signal And Sending Control Signal
CN102055412A (zh) * 2010-12-02 2011-05-11 华为技术有限公司 一种功率放大器保护电路、通信设备和方法
CN102271425A (zh) * 2011-06-22 2011-12-07 中兴通讯股份有限公司 一种保护功放的方法和装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004211669A (ja) * 2003-01-09 2004-07-29 Toshiba Corp サーボ弁制御装置およびサーボ弁制御システムの異常検出装置
CN102055416A (zh) * 2010-12-01 2011-05-11 中兴通讯股份有限公司 一种老化射频功率放大器的方法及系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080260185A1 (en) * 2007-04-18 2008-10-23 Ching Hung Tseng Method And Apparatus For Automatically Detecting Audio Signal And Sending Control Signal
CN102055412A (zh) * 2010-12-02 2011-05-11 华为技术有限公司 一种功率放大器保护电路、通信设备和方法
CN102271425A (zh) * 2011-06-22 2011-12-07 中兴通讯股份有限公司 一种保护功放的方法和装置

Also Published As

Publication number Publication date
CN103187936B (zh) 2017-04-12
CN103187936A (zh) 2013-07-03

Similar Documents

Publication Publication Date Title
US8519789B2 (en) Pre-distortion for fast power transient waveforms
US11394412B2 (en) Predistortion circuit, method for generating a predistorted baseband signal, control circuit for a predistortion circuit, method to determine parameters for a predistortion circuit, and apparatus and method for predistorting a baseband signal
US7755429B2 (en) System and method for dynamic drain voltage adjustment to control linearity, output power, and efficiency in RF power amplifiers
CN101175061B (zh) 一种ofdm发射机的自适应数字预失真方法和装置
JP5621666B2 (ja) デジタルプレディストーション処理装置及び方法
JP2016029803A (ja) 遠隔で再構成可能な電力増幅器システムおよび方法
WO2013107369A1 (fr) Procédé et dispositif pour un écrêtage de signaux à large bande d'une pluralité de bandes de fréquences
WO2007000495A1 (fr) Procede de traitement de donnees, dispositif de predistorsion, emetteur, element de reseau et station de base
CN101562478A (zh) 一种自适应调整cfr门限的方法及射频拉远系统
WO2009009987A1 (fr) Procédé et dispositif pour suivre un service d'amplification de puissance doherty
Jeong et al. Wideband envelope tracking power amplifier with reduced bandwidth power supply waveform
US8837635B2 (en) Controlling a transmit path based on monitored error vector magnitude (EVM) performance
CN101969423A (zh) 一种峰值因子消减方法和装置以及一种射频拉远系统
JP3905331B2 (ja) 無線デバイス用送信器と送信器内のパワー増幅器の効率を改善する方法と装置
US8233852B2 (en) Calibration techniques for non-linear devices
US9042434B2 (en) Filter
WO2013097360A1 (fr) Procédé et appareil de protection d'un amplificateur de puissance contre des anomalies
US9148096B2 (en) Device and method for controlling an input signal of a power amplifier
KR20190022867A (ko) Miso 시스템의 개선된 피드백
CN101447966B (zh) 一种自适应调整门限的峰平比控制方法
WO2012119400A1 (fr) Procédé de traitement d'une suite de signaux et station de base
Nair et al. A comparative study on digital predistortion techniques for Doherty amplifier for LTE applications
GB2527816A (en) Improvements to digital pre-distortion processing
US20230126040A1 (en) Power amplifier linearity control based on power amplifier operating mode or power level
Santucci et al. A block adaptive predistortion algorithm for transceivers with long transmit-receive latency

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12863778

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12863778

Country of ref document: EP

Kind code of ref document: A1