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WO2016000169A1 - Appareil et procédé de correction de pré-distorsion numérique - Google Patents

Appareil et procédé de correction de pré-distorsion numérique Download PDF

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Publication number
WO2016000169A1
WO2016000169A1 PCT/CN2014/081265 CN2014081265W WO2016000169A1 WO 2016000169 A1 WO2016000169 A1 WO 2016000169A1 CN 2014081265 W CN2014081265 W CN 2014081265W WO 2016000169 A1 WO2016000169 A1 WO 2016000169A1
Authority
WO
WIPO (PCT)
Prior art keywords
power amplifier
correction
coefficient
state
parameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/081265
Other languages
English (en)
Chinese (zh)
Inventor
肖宇翔
朱尔霓
殷潜
黄鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2014/081265 priority Critical patent/WO2016000169A1/fr
Priority to CN201480029146.7A priority patent/CN105453421B/zh
Publication of WO2016000169A1 publication Critical patent/WO2016000169A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a digital predistortion correction apparatus and method.
  • Scenery technology relates to the field of wireless communications, and in particular, to a digital predistortion correction apparatus and method.
  • DPD Digital Pre-Distortion
  • BTS Base Transceiver Station
  • DPD Digital Pre-Distortion
  • the basic principle is to set up a non-linear DPD correction device and amplifier cascade, so that the entire link exhibits linear amplification.
  • a set of nonlinear functions (
  • DPD correction can be performed based on the following formula:
  • / is the standard correction coefficient, which can be generated according to the difference between the input signal of the DPD correction device and the output signal of the power amplifier by an adaptive iterative algorithm.
  • the circuit logic of the implementation of the DPD correction device based on the standard DPD correction method is shown in FIG.
  • the correction effect of the DPD correction device based on the standard DPD correction method is better; however, in the actual application scenario, various factors may cause the state of the power to be changed at different times, and the characteristics of the nonlinear distortion There is also a change, and at this time, the DPD correction device based on the standard DPD correction method will have difficulty in ensuring the correction effect.
  • Embodiments of the present invention provide a DPD calibration apparatus and method, which can ensure a correction effect.
  • a DPD correction apparatus including:
  • a solving unit configured to determine a standard correction coefficient according to an input signal of the DPD correction device and an output signal of the power amplifier
  • a determining unit configured to determine, according to a standard correction coefficient determined by the solving unit and a power state state characterization value, a correction applying coefficient; wherein, the power amplifier state characterization value is related to a parameter value of at least one power amp state parameter;
  • a correction unit configured to perform DPD correction based on the correction application coefficient determined by the determining unit.
  • the determining unit is specifically configured to: when the number of the power amplifier state representation values is one, and when the power amplifier state parameter is related to the parameter values in one measurement scale, The correction applied coefficient is determined based on the following formula:
  • the value is represented by the power amplifier state
  • Cpmls is the standard correction factor
  • the determining unit is specifically configured to: when the number of power amplifier state representation values is K, and a power amplifier state parameter in the f metric scales, respectively
  • the correction applied coefficient is determined based on the following formula:
  • the determining unit is specifically configured to: when the number of the power state state representation values is f, and the parameter values of the f power amplifier state parameters are respectively related, based on the following The formula determines the correction application factor: ,
  • the power amplifier state parameter specifically includes a measurement parameter of a memory effect of the power amplifier, a power of an input signal of the power amplifier, an envelope of an input signal of the power amplifier, an input voltage of the power amplifier, and an input current of the power amplifier.
  • a DPD correction method including:
  • DPD correction is performed based on the correction applied coefficients.
  • determining the correction application coefficient specifically includes determining the correction application coefficient based on the following formula: S- ⁇
  • Cpmls is the standard correction factor
  • determining the correction application coefficient specifically including determining the correction application coefficient based on the following formula:
  • Cpmlks is the standard correction factor
  • determining the correction application coefficient specifically including determining the correction application coefficient based on the following formula:
  • Cpmlks is the standard correction factor
  • the power amplifier state parameter specifically includes a measurement parameter of a memory effect of the power amplifier, a power of an input signal of the power amplifier, an envelope of an input signal of the power amplifier, an input voltage of the power amplifier, and an input current of the power amplifier.
  • the DPD correction method provided by the second aspect relates to a coefficient applied when linearly correcting the power amplifier, that is, a correction application coefficient and a power amplifier state representation value; even if the power is changed at different times Larger, because the DPD correction scheme provided by the present invention takes into account the power amplifier state, it is more reasonable than the prior art, and the correction effect can be ensured.
  • FIG. 1 is a logic diagram of an implementation circuit of a DPD correction apparatus based on a standard DPD correction method
  • FIG. 2 is a schematic structural diagram of a DPD correction apparatus according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an implementation circuit of a DPD correction apparatus according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of an implementation circuit of a DPD correction apparatus according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of an implementation circuit of a DPD correction apparatus according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram of an implementation circuit of a DPD correction apparatus according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic diagram of a schematic diagram of an implementation circuit of a DPD correction apparatus according to Embodiment 3 of the present invention.
  • FIG. 9 is a schematic flowchart diagram of a DPD correction method according to an embodiment of the present invention. detailed description
  • an embodiment of the present invention provides a DPD correction apparatus and method.
  • a preferred embodiment of the present invention will be described with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only The invention is illustrated and described, and is not intended to limit the invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
  • the embodiment of the present invention provides a DPD correction device, as shown in FIG. 2, specifically comprising: a resolving unit 201, configured to determine a standard correction coefficient according to an input signal of the DPD correction device and an output signal of the power amplifier;
  • the determining unit 202 is configured to determine, according to the standard correction coefficient determined by the solving unit 201 and the power amplifier state representation value, the correction application coefficient; wherein, the power amplifier state representation value is related to the parameter value of the at least one power amplifier state parameter;
  • the correcting unit 203 is configured to perform DPD correction based on the corrected application coefficient determined by the determining unit 202.
  • the power state parameter includes the measurement parameter of the memory effect of the power amplifier, the power of the input signal of the power amplifier, the envelope of the input signal of the power amplifier, the input voltage of the power amplifier, and the input current of the power amplifier.
  • the foregoing parameters are merely examples and are not intended to limit the present invention, and other parameters capable of characterizing the state of the power amplifier can also be used as one of the power state state parameters in the present invention. Said.
  • the number of power amplifier state representation values is one, and one power amplifier state parameter is related to the parameter value in one measurement scale, for example, the power amplifier state representation value is only related to the power amplifier record.
  • the metric parameter of the recall effect is related to the parameter value in microseconds.
  • the resolving unit 201 can determine the standard correction coefficient by using an adaptive iterative algorithm according to the difference between the input signal of the DPD correcting device and the output signal of the power amplifier.
  • the determining unit 202 may specifically determine the correction applying coefficient based on the following formula:
  • the value is represented by the power amplifier state
  • Cpmls is the standard correction factor
  • the correcting unit 203 After the determining unit 202 determines the correction applied coefficient, the correcting unit 203 performs DPD correction based on the corrected applied coefficient:
  • & () ⁇ fi ⁇ x(nm) ⁇ ) can be used as a basis function of the DPD correction to fit the nonlinearity of the power amplifier, and the solving unit 201 determines the standard correction coefficient c pmls according to the basis function.
  • the implementation circuit logic of the DPD correction apparatus provided in Embodiment 1 of the present invention may be as shown in FIG. 3.
  • the DPD correction apparatus includes ⁇ ⁇ / ⁇ a nonlinear module, where is a nonlinear function (
  • the delay signal Delayl is used to process the input signal: x ⁇ np); At the same time, for the input signal: take the absolute value and then use the delay pair 2 to process, get the input as function (); correct the product of the applied coefficient and the output of the function () and then the delay
  • the product of the output of 1 is the output of the nonlinear module, and the sum of the outputs of the ⁇ / ⁇ non-linear modules is the output of the DPD correction device.
  • LUT 2D ⁇ (/7- ?) ⁇ LUT 2D (,
  • LUT 2D is a two-dimensional lookup table, which computes the combination of q and
  • the value of ( ⁇ ("-TM) ⁇ ) can be selected according to the dependence of the correction applied coefficient on the characterization value of the power amplifier state.
  • the dependence of the correction applied coefficient on the power amplifier state representation value q is a segmentation constant.
  • the coefficient applied when linearly correcting the power amplifier that is, the correction applied coefficient and the parameter value of a power amplifier state parameter in one metric scale are related, even if the power is changed at different times. , can also guarantee the DPD correction effect.
  • the number of power amplifier state representation values is f, and a power amplifier state
  • the parameter values of the parameters in the f metrics are respectively related.
  • the number of characterization values of the power amplifier state is three.
  • the metric value of a power amplifier state characterization value and the memory effect of the power amplifier are related to the parameter value in microseconds.
  • the metric parameter of the power amplifier state characterization value and the memory effect of the power amplifier is related to the parameter value in milliseconds
  • the metric parameter of the power amplifier state characterization value and the memory effect of the power amplifier are related to the parameter value in seconds.
  • the resolving unit 201 can determine the standard correction coefficient by using an adaptive iterative algorithm according to the difference between the input signal of the DPD correction device and the output signal of the power amplifier.
  • the determining unit 202 can specifically determine the correction applying coefficient based on the following formula: ( ⁇ , 3 ⁇ , ⁇ , 3 ⁇ - ⁇ ) ⁇
  • Pmi(qo, q ..., qt-i) is the correction applied coefficient
  • the correcting unit 203 After the determining unit 202 determines the correction applied coefficient ra / ( Q, q x , - 0 , the correcting unit 203 performs DPD correction based on the corrected applied coefficient:
  • k (q k ) ⁇ fi( ⁇ x(nm) ⁇ ) can be used as the basis function of the DPD correction.
  • the non-linearity of the power amplifier, the resolving unit 201 determines the standard correction coefficient c pmlks according to the basis function.
  • the implementation circuit logic of the DPD correction apparatus provided in Embodiment 2 of the present invention can be as shown in FIG. 5. Further, the DPD correction device shown in FIG. 5 can also be implemented by using a lookup table of dimensions, as shown in FIG.
  • y ⁇ n ⁇ x(np)- ⁇ ⁇ c p ⁇ .g sk (q k )-f l ( ⁇ x(nm) ⁇ )
  • the correction application coefficient and a power amplifier state parameter are related to the parameter values of the K metric scales. Therefore, the embodiment 2 of the present invention can be applied to the power amplifier state for a certain power amplifier state parameter.
  • the measure of the scale has a more complex dependency in the application scenario.
  • the number of power amplifier state representation values is f
  • the parameter values of the f power amplifier state parameters are respectively related.
  • the number of power amplifier state representation values is three, wherein one power amplifier state representation value and The metric parameter of the memory effect of the power amplifier is related to the parameter value in units of hours.
  • the power value of a power amplifier state and the power of the input signal of the power amplifier are related to the parameter value under the watt, and the power characterization state and the input voltage of the power amplifier are The unit is related to the parameter value at millivolts.
  • the resolving unit 201 can determine the standard correction coefficient by using an adaptive iterative algorithm according to the difference between the input signal of the DPD correction device and the output signal of the power amplifier.
  • the determining unit 202 may specifically determine the correction application coefficient based on the following formula: ,
  • Pmi(qo, q ..., qt-i) is the correction applied coefficient
  • the correcting unit 203 After the determining unit 202 determines the correction applied coefficient ra / ( Q, q x , - 0 , the correcting unit 203 performs DPD correction based on the corrected applied coefficient:
  • the solving unit 201 determines the standard correction coefficient c pmlks according to the basis function.
  • the implementation circuit logic of the DPD correction apparatus provided in Embodiment 3 of the present invention can be as shown in FIG. 7 . Further, the DPD correction device shown in FIG. 7 can also be implemented by using a lookup table of dimensions, as shown in FIG.
  • the correction application coefficient is related to the parameter value of the f power amplifier state parameter. Therefore, the embodiment 3 of the present invention can be applied to an application scenario in which the power amplifier state has strong dependence on various power amplifier state parameters. in.
  • the DPD correction apparatus provided by the above-mentioned embodiments of the present invention, and correspondingly, the embodiment of the present invention further provides a DPD correction method, and a schematic structural diagram thereof is shown in FIG. 9, which specifically includes:
  • DPD correction is performed based on the correction applied coefficient.
  • the correction application coefficient according to the standard correction coefficient and the power amplifier state representation value, specifically including The formula determines the correction application factor:
  • the value is represented by the power amplifier state
  • Cpmls is the standard correction factor
  • determining the correction application coefficient according to the standard correction coefficient and the power amplifier state representation value includes determining the corrected application factor based on the following formula:
  • Cpmlks is the standard correction factor
  • determining the correction application coefficient according to the standard correction coefficient and the power amplifier state representation value specifically including determining according to the following formula Correction application factor:
  • the power state parameter specifically includes a measurement parameter of a memory effect of the power amplifier, a power of the input signal of the power amplifier, an envelope of an input signal of the power amplifier, an input voltage of the power amplifier, and an input current of the power amplifier.
  • processing steps in the above process may correspond to the functions of the corresponding units shown in FIG. 2-8, and are not described herein again.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • a computer-usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device. Having a series of operational steps performed on a computer or other programmable device to produce computer-implemented processing, such that instructions executed on a computer or other programmable device are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of a function specified in a box or multiple boxes.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

L'invention concerne un appareil et un procédé de correction de pré-distorsion numérique (DPD) qui peuvent assurer un effet de correction de DPD. L'appareil comporte : une unité de résolution, utilisée pour déterminer un coefficient de correction standard en fonction d'un signal d'entrée de l'appareil de correction de DPD et d'un signal de sortie d'un amplificateur de puissance; une unité de détermination, utilisée pour déterminer un coefficient d'application de correction en fonction du coefficient de correction standard déterminé par l'unité de résolution et d'une valeur de représentation d'état d'amplificateur de puissance, la valeur de représentation d'état d'amplificateur de puissance étant relative à une valeur de paramètre d'au moins un paramètre d'état d'amplificateur de puissance; une unité de correction, utilisée pour exécuter une correction de DPD en fonction du coefficient d'application de correction déterminé par l'unité de détermination.
PCT/CN2014/081265 2014-06-30 2014-06-30 Appareil et procédé de correction de pré-distorsion numérique Ceased WO2016000169A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2014/081265 WO2016000169A1 (fr) 2014-06-30 2014-06-30 Appareil et procédé de correction de pré-distorsion numérique
CN201480029146.7A CN105453421B (zh) 2014-06-30 2014-06-30 一种数字预失真校正装置及方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/081265 WO2016000169A1 (fr) 2014-06-30 2014-06-30 Appareil et procédé de correction de pré-distorsion numérique

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WO2016000169A1 true WO2016000169A1 (fr) 2016-01-07

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WO2024113313A1 (fr) * 2022-12-01 2024-06-06 Telefonaktiebolaget Lm Ericsson (Publ) Génération de modèles de prédistorsion numérique à l'aide de mesures de performance
WO2024152921A1 (fr) * 2023-01-20 2024-07-25 华为技术有限公司 Procédé de traitement de signal et appareil associé

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CN101467347A (zh) * 2006-06-08 2009-06-24 株式会社东芝 失真补偿装置、放大装置、发射机和失真补偿方法
CN102437822A (zh) * 2011-11-30 2012-05-02 上海瑞和安琦通信科技有限公司 一种射频功率放大器自适应数字预失真线性化系统
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GB2388983B (en) * 2002-05-24 2006-06-28 Wireless Systems Int Ltd Predistortion Control
US7034612B2 (en) * 2002-07-20 2006-04-25 Lg Electronics Inc. Apparatus and method for compensating pre-distortion of a power amplifier
CN101478514B (zh) * 2009-01-08 2011-08-24 福建邮科通信技术有限公司 一种实现数字功率预失真的方法
CN102148783A (zh) * 2010-02-05 2011-08-10 富士通株式会社 基带数字预失真方法、预失真装置以及功率放大装置
CN102413085B (zh) * 2011-10-12 2017-02-08 中兴通讯股份有限公司 一种数字预失真方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101467347A (zh) * 2006-06-08 2009-06-24 株式会社东芝 失真补偿装置、放大装置、发射机和失真补偿方法
CN102437822A (zh) * 2011-11-30 2012-05-02 上海瑞和安琦通信科技有限公司 一种射频功率放大器自适应数字预失真线性化系统
CN102572874A (zh) * 2011-12-12 2012-07-11 中兴通讯股份有限公司 一种数字预失真参数监控装置及方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024113313A1 (fr) * 2022-12-01 2024-06-06 Telefonaktiebolaget Lm Ericsson (Publ) Génération de modèles de prédistorsion numérique à l'aide de mesures de performance
WO2024152921A1 (fr) * 2023-01-20 2024-07-25 华为技术有限公司 Procédé de traitement de signal et appareil associé

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Publication number Publication date
CN105453421A (zh) 2016-03-30
CN105453421B (zh) 2018-12-07

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