CN104796364B - The method of one kind and obtaining predistortion parameters predistortion processing system - Google Patents

The method of one kind and obtaining predistortion parameters predistortion processing system Download PDF

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CN104796364B
CN104796364B CN201410020990.5A CN201410020990A CN104796364B CN 104796364 B CN104796364 B CN 104796364B CN 201410020990 A CN201410020990 A CN 201410020990A CN 104796364 B CN104796364 B CN 104796364B
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predistortion
signal
matrix
feedback signal
formed
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CN104796364A (en
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苏慧君
邓炳荣
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京信通信系统(中国)有限公司
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Abstract

本发明公开了一种预失真参数求取方法及预失真处理系统,涉及数字预失真信号处理领域,用以在需要处理的信号带宽较大时,依然能保证数字预失真的信号处理质量。 The present invention discloses a method for calculating predistortion parameters and predistortion processing system, to a digital predistortion signal processing for when needed to process large bandwidth signals, the signal processing can still ensure the quality of the digital predistortion. 该方法包括:在周期性DPD数字预失真开始后,在每一周期开始时采集经过预失真处理的预失真信号和经过功放处理的第一反馈信号;在每一周期结束时,将本周期内采集的所有第一反馈信号一一进行预处理形成对应的第二反馈信号;根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数;根据确定的所述预失真参数更新预失真参数索引表。 The method comprising: periodically after start DPD digital predistortion, predistortion processing after acquisition of the first feedback signal and the predistortion signal after power amplification processing at the beginning of each cycle; at the end of each cycle, this cycle will be All eleven of the first feedback signal acquisition pretreated form a corresponding second feedback signal; all of the predistortion parameter matrices for all the second feedback signal is formed and all of the matrix is ​​determined according to the predistortion signal is formed in accordance with; in accordance with determining the predistortion parameter updating predistortion parameter index table.

Description

一种预失真参数求取方法及预失真处理系统 The method of one kind and obtaining predistortion parameters predistortion processing system

技术领域 FIELD

[0001] 本发明涉及数字预失真信号处理领域,具体涉及一种预失真参数求取方法及预失真处理系统。 [0001] The present invention relates to a digital predistortion signal processing, and particularly relates to a method of obtaining predistortion parameters and predistortion processing system.

背景技术 Background technique

[0002] 无线通信系统正在全面进入3G并迈向4G,功率放大器作为通信系统中影响系统性能和覆盖范围的关键部件。 [0002] The wireless communication system is entered towards 3G and 4G, a key component of a power amplifier in a communication system affect system performance and coverage. 非线性和记忆效应是功率放大器的固有特性,但是,这两个特性将会引起已过滤的信号频谱的增长,进而造成对相邻信道干扰,也会造成带内信号的失真, 提高系统的误码率。 Nonlinearity and memory effects are inherent characteristics of the power amplifier, however, these two features will lead to growth in the filtered signal spectrum, thereby causing channel interference to adjacent channel will cause distortion-band signal, improve system error rate.

[0003] 因此,对功率放大器进行线性化处理以提高其功效对于无线通信的发展至关重要。 [0003] Thus, the linear power amplifier to improve their effectiveness process is essential for the development of wireless communication. 在现有技术中,采用多种方法对功率放大器进行线性处理,例如:反馈法、前馈法,数字预失真等方法。 In the prior art, using a variety of methods for processing linear power amplifier, for example: a feedback method, a feedforward method, digital predistortion method. 在这些线性化技术中,利用数字预失真技术对发射机的功率放大器进行线性化是性价比最高的技术,具有精度高、适用带宽宽、实现成本低等优点,目前被广泛应用。 In these linearization techniques, digital pre-distortion technique using the transmitter power amplifier is linearized most cost-effective technique, with high precision for wide bandwidth, to achieve low cost, is widely used.

[0004] 正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)、多输入多输出(Multi-Input Multi-Output,]\OMO)、]\OM0-0FDM技术以其突出的优势在众多领域得到广泛应用。 [0004] Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM), MIMO (Multi-Input Multi-Output,] \ OMO),] \ OM0-0FDM its outstanding technical advantages in many fields in widely used. 通信系统应用的带宽越来越宽,达数十兆赫兹甚至上百赫兹,因此作为通信系统的关键角色一一功率放大器必须具有宽带或超宽带的相关性能。 Bandwidth communication system applications increasingly wide, up to tens or even hundreds of megahertz hertz, so a key role as a communication system one by one power amplifier must have the relevant performance broadband or ultra-broadband. 随着带宽的增加,功率放大器的非线性特性,尤其是记忆效应会相应加强,这就对数字预失真技术提出了更高的要求。 As bandwidth increases, the nonlinear characteristics of the power amplifier, especially the memory effect will be strengthened accordingly, this digital pre-distortion technology put forward higher requirements.

[0005] 数字预失真的基本原理很简单,即在功率放大器前面设置一个与其特性(非线性) 相反的模块,使得整个链路呈现线性放大功能。 The basic principles of the [0005] digital predistortion is very simple, i.e., its characteristic is provided a (non-linear) opposite to the front of the power amplifier module, so that the entire link exhibits linear amplification function. 通过功放输入和输出数据估计预失真参数, 然后发送至预失真器对基带信号进行非线性和记忆效应进行补偿。 Predistortion parameters, and then sent to the predistorter and the nonlinear baseband signal to compensate for memory effects the amplifier input and output data through the estimation.

[0006] 在窄带信号的情况下,模型不考虑功放的记忆效应,例如Sale模型、Rapp模型、多项式模型等,这些模型都得到了广泛的应用。 [0006] In the case of narrowband signals, the model without considering the memory effect of the amplifier, e.g. Sale model, Rapp, models, polynomial models, these models have been widely used.

[0007] 后来,随着信号带宽的增加,为了补偿功放的记忆效应,提出了Volterra模型、记忆多项式(Memory Polynomial,MP)模型、Wiener模型、Hammerstein模型等,其中Valera模型过于复杂,不利于实际系统的实现,所以不予采用,而后面几种模型在某种程度上都是Volterra模型的简化形式。 [0007] Later, with the increase in signal bandwidth, in order to compensate for the memory effect of the amplifier proposed Volterra model, memory polynomial (Memory Polynomial, MP) model, Wiener model, Hammerstein models, which Valera model is too complicated and not conducive to the actual implementation of the system, thus not used, and somewhat simplified form of the Volterra model are several models behind. 目前比较流行的是记忆多项式模型。 The more popular is the memory polynomial model.

[0008] 由于信号在功放时,信号带宽越宽,记忆效应越严重,所以记忆多项式模型一般在信号带宽小于20MHz的情况下是比较有效的,大于20MHz时其性能不太理想。 [0008] Since the signal at the amplifier, the wider the signal bandwidth, the more serious memory effect, so the memory polynomial model is generally less than in the case where the signal bandwidth is 20MHz more effective, its performance is not greater than 20MHz over. 针对这个问题, 又提出来广义记忆多项式模型(General ized Memory Polynomial,GMP)和DDR (Dynamic Deviation Reduction)模型。 To address this problem, but also raised generalized memory polynomial model (General ized Memory Polynomial, GMP) and DDR (Dynamic Deviation Reduction) model.

[0009] 由于DDR模型引入了2阶动态项(模型表达式的后三项),而这些项对补偿功放的记忆效应更为有效,所以一般情况下DDR模型比GMP模型具有更好的性能。 [0009] Since the introduction of the 2-order model DDR dynamic term (after three model expression), and these items more effective compensation of the memory effect of the amplifier, the DDR model has better performance than general GMP model. 然而,当信号带宽达到60MHz以上时,DDR模型的性能仍然不够理想。 However, when the signal bandwidth of 60MHz or more, the performance DDR model is still not ideal.

发明内容 SUMMARY

[0010] 本发明实施例提供了一种预失真参数求取方法及预失真处理系统,用以在需要处理的信号带宽较大时,依然能保证数字预失真的信号处理质量。 [0010] Example embodiments provide a predistortion method of the present invention and obtaining parameters predistortion processing system for processing signals required when large bandwidth, signal processing can still ensure the quality of the digital predistortion.

[0011] 本发明提供了一种预失真参数求取方法,该方法包括: [0011] The present invention provides a method of obtaining predistortion parameters, the method comprising:

[0012] 在周期性数字预失真(DPD,Digital Pre-Distortion)开始后,在每一周期开始时采集经过预失真处理的预失真信号和经过功放处理的第一反馈信号,根据如下预失真模型进行所述预失真处理: [0012] The pre-distortion (DPD, Digital Pre-Distortion) after the start of the periodic digital, collecting pre-distortion processing a first feedback signal and the predistortion signal amplifier at the beginning of each treatment cycle, according to the following pre-distortion model the pre-distortion processing performed:

Figure CN104796364BD00051

[0014] 其中,z (η)表示η时刻输出的经过预失真处理后的预失真信号,X (η)表示η时刻输入的原始信号,η表示原始信号的输入时刻,1表示预失真信号的记忆时刻,a、b、c、d表示预失真参数,L表示记忆深度,k表示多项式阶数,K表示最大多项式阶数,*表示信号的共辄,|x (η) I表示原始信号的信号幅值,X* (η)表示原始信号的共辄信号; [0014] wherein, z (η) represented by [eta] time outputted through the predistortion signal processed predistortion, X (η) represent the original signal [eta] time input, [eta] represents the input timing of the original signal, 1 indicates the pre-distorted signal memory timing, a, b, c, d represents a predistortion parameter, L represents a memory depth, k represents a polynomial order, K represents the maximum order of the polynomial, * indicates a total Noir signal, | x (η) I represents the original signal signal amplitude, X * (η) were Noir signal indicates the original signal;

[0015] 在每一周期结束时,将本周期内采集的所有第一反馈信号一一进行预处理形成对应的第二反馈信号; All the first feedback signal [0015] At the end of each cycle, this cycle will be collected one by one second feedback signal corresponding to the pre-formed;

[0016] 根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数; [0016] All of the predistortion parameters is determined according to a matrix of all the second feedback signal is formed and all of said matrix formed in accordance with predistortion signal;

[0017] 根据确定的所述预失真参数更新预失真参数索引表。 [0017] The distortion parameter update the predistortion parameter index table according to the pre-determined.

[0018] 本发明上述技术方案提供了一种基于DDR模型的改进预失真模型,与传统的DDR模型相比,本发明提供的预失真模型加深了记忆深度的影响,模型增强了记忆深度的影响,增强模型对功放记忆效应的补偿能力,达到不增加计算复杂度的情况下进一步提高宽带DPD 性能的目的,尤其是提高了处理带宽较大信号时的处理性能。 [0018] The above technical solution of the present invention provides an improved model-based DDR predistortion model, compared with the conventional DDR model, the predistortion model of the present invention provides a depth deepens and memory model to enhance the depth and memory , enhance the ability to compensate memory effects of the power amplifier model, to achieve the object of the case without increasing the computational complexity of further improved broadband performance DPD, in particular to improve the performance when processing large processing bandwidth signals.

[0019] 优选地,根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数,具体包括: [0019] Preferably, the matrix is ​​formed of all the second feedback signal and determining all of the predistortion parameters based on all of the matrix formed in accordance with the predistortion signal comprises:

[0020] 根据LS算法计算所有所述第二反馈信号形成的矩阵与其共辄矩阵的第一乘积和所有所述第二反馈信号形成的矩阵和所有所述预失真信号形成的矩阵的第二乘积; [0020] The second product calculating a first product of the second feedback signal is formed according to all the LS algorithm copolymerizable therewith noir matrix matrix matrix and the matrix of all the second feedback signal is formed and all of the predistortion signal forming ;

[0021] 根据所述第二乘积与所述第一乘积的比值确定所有的预失真参数。 [0021] All of the predistortion parameters is determined according to the ratio of the first and second product the product.

[0022] 本发明上述技术方案中,利用了预失真模型目的就是趋近于功放模型的原理,将第一反馈信号与预失真信号建立关系式,进而通过LS算法求取预失真参数。 Above technical solution [0022] In the present invention, utilizing the principle of pre-distortion amplifier model object is close to the model, the first feedback signal and to establish the relationship predistortion signal, thereby obtaining predistortion parameters by LS algorithm.

[0023] 本发明提供了一种数字预失真处理系统,该系统包括: [0023] The present invention provides a digital predistortion processing system, the system comprising:

[0024] 预失真器,用于在周期性Dro数字预失真开始后,对输入的原始信号进行预失真处理,向功放器输出对应的预失真信号;根据运算器发送的预失真参数更新预失真参数索引表,所述预失真信号根据如下预失真模型获得: [0024] Pre-distorter for pre-distortion digital Dro periodically after the start, the original signal inputted to the pre-distortion processing, to the pre-distortion signal corresponding to the output of the amplifier; calculating updated predistortion parameters sent by the predistortion parameter index table, the predistortion predistortion signal obtained according to the following model:

Figure CN104796364BD00061

[0026] 其中,z (η)表示η时刻输出的经过预失真处理后的预失真信号,X (η)表示η时刻输入的原始信号,η表示原始信号的输入时刻,1表示预失真信号的记忆时刻,a、b、c、d表示预失真参数,L表示记忆深度,k表示多项式阶数,K表示最大多项式阶数,*表示信号的共辄,|x (η) I表示原始信号的信号幅值,X* (η)表示原始信号的共辄信号; [0026] wherein, z (η) represented by [eta] time outputted through the predistortion signal processed predistortion, X (η) represent the original signal [eta] time input, [eta] represents the input timing of the original signal, 1 indicates the pre-distorted signal memory timing, a, b, c, d represents a predistortion parameter, L represents a memory depth, k represents a polynomial order, K represents the maximum order of the polynomial, * indicates a total Noir signal, | x (η) I represents the original signal signal amplitude, X * (η) were Noir signal indicates the original signal;

[0027] 功放器,用于对预失真器输出的预失真信号进行功放,并向运算器输出第一反馈信号; [0027] The power amplifier, the predistortion signal for output by the predistorter amplifier, and outputs a first feedback signal computing unit;

[0028] 运算器,用于在每一周期结束时,采集本周期内生成的所有第一反馈信号和所有预失真信号,并对所有所述第一反馈信号一一进行预处理形成对应的第二反馈信号;根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数;将所有的所述预失真参数发送到预失真器。 [0028] The operator, at the end of each cycle to collect all of the first feedback signal generated during the week and all the predistortion signal, and all of said first feedback signal corresponding to the one by the first pre-formed two feedback signal; determining all parameters of the predistortion matrix formed of all the second feedback signal and a matrix formed in accordance with all the predistortion signal; send all the predistortion parameter to the predistorter.

[0029] 在本发明上述技术方案中,提供了一个预失真处理系统,其中,将预失真器中的预失真模型在传统DDR模型的基础上进行了改进,模型增强了记忆深度的影响,目的是增强模型对功放记忆效应的补偿能力,达到不增加计算复杂度的情况下进一步提高宽带DPD性能的目的。 [0029] In the above aspect of the present invention, there is provided a predistortion processing system, wherein the pre-distortion model predistorter has been improved on the basis of a conventional DDR model, the model is enhanced depth and memory object It is to enhance the ability to compensate memory effects of the power amplifier model, to achieve the object of the case without increasing the computational complexity of further improved broadband performance DPD.

[0030] 本发明实施例,通过对传统DDR模型的进行的改进,得到了本发明提出的预失真模型,相比于传统DDR模型,本发明预失真模型增强了记忆深度的影响,目的是增强模型对功放记忆效应的补偿能力,从而实现了不增加计算复杂度的情况下进一步提高宽带DPD性能的目的。 [0030] Example embodiments of the present invention, by improving the DDR performs traditional model, has been pre-distortion model proposed by the present invention, compared to conventional DDR model, the predistortion model of the present invention enhances the depth and memory, the purpose of enhancing model the ability to compensate the amplifier memory effect, thus achieving the purpose without increasing the computational complexity is further improved broadband performance DPD.

附图说明 BRIEF DESCRIPTION

[0031] 图1为本发明实施例提供的一种预失真参数求取方法的方法流程示意图; [0031] Fig 1 a schematic view of predistortion parameters to implement a method of obtaining method provided in the present invention;

[0032] 图2为本发明实施例提供的预失真模型与传统DDR模型的性能对比示意图; [0032] FIG 2 a schematic comparison of the performance of conventional predistortion model DDR model according to an embodiment of the present invention;

[0033]图3为图2的局部放大不意图; [0033] FIG. 3 is a partial enlargement of Figure 2 is not intended;

[0034]图4为本发明实施例提供的一种数字预失真参数的求取方法的详细实施例流程示意图; [0034] FIG. 4 is a schematic detailed embodiment the process provides a digital predistortion method for determining the parameters of the embodiment of the present invention;

[0035] 图5为本发明实施例提供的一种数字预失真处理系统的信号流程示意图; [0035] Figure 5 provides a schematic diagram of a digital predistortion signal flow processing system according to embodiments of the present invention;

[0036] 图6为本发明实施例提供的一种数字预失真处理系统的系统结构示意图。 [0036] FIG 6 provides embodiments of a digital pre-processing system architecture diagram of a system of the present invention distortion.

具体实施方式 Detailed ways

[0037] 由于现有的DDR模型在处理带宽较大的信号时表现不佳,所以本发明实施例提供了一种预失真参数求取方法及预失真处理系统,用以在信号带宽较大时,依然保证数字预失真的信号处理质量。 [0037] Due to the poor performance of conventional DDR model at higher signal processing bandwidth, the embodiments of the present invention provides a predistortion parameter is obtained when one kind of predistortion processing method and system for the large signal bandwidth still ensure the quality of the signal processing digital pre-distortion.

[0038] 首先,本发明实施例提供了一种预失真参数求取方法,如图1所示,该方法包括: [0038] First, an embodiment of the present invention provides a method of obtaining predistortion parameters, shown in Figure 1, the method comprising:

[0039] SlOl,在周期性Dro数字预失真开始后,在每一周期开始时采集经过预失真处理的预失真信号和经过功放处理的第一反馈信号,根据如下预失真模型进行所述预失真处理: [0039] SlOl, after beginning a periodic digital predistortion Dro, after collection of pre-distortion processing amplifier predistortion signal and the first feedback signal processed at the beginning of each cycle, the predistortion performed according to the following model predistortion deal with:

Figure CN104796364BD00071

[0041] 其中,z (η)表示η时刻输出的经过预失真处理后的预失真信号,X (η)表示η时刻输入的原始信号,η表示原始信号的输入时刻,1表示预失真信号的记忆时刻,a、b、c、d表示预失真参数,L表示记忆深度,k表示多项式阶数,K表示最大多项式阶数,*表示信号的共辄,|x (η) I表示原始信号的信号幅值,X* (η)表示原始信号的共辄信号; [0041] wherein, z (η) represented by [eta] time outputted through the predistortion signal processed predistortion, X (η) represent the original signal [eta] time input, [eta] represents the input timing of the original signal, 1 indicates the pre-distorted signal memory timing, a, b, c, d represents a predistortion parameter, L represents a memory depth, k represents a polynomial order, K represents the maximum order of the polynomial, * indicates a total Noir signal, | x (η) I represents the original signal signal amplitude, X * (η) were Noir signal indicates the original signal;

[0042] S102,在每一周期结束时,将本周期内采集的所有第一反馈信号一一进行预处理形成对应的第二反馈信号; All the first feedback signal [0042] S102, at the end of each cycle, this cycle will be collected one by one second feedback signal corresponding to the pre-formed;

[0043] S103,根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数; [0043] S103, a matrix of all the second feedback signal is formed and all of the matrix is ​​determined according to the predistortion signal is formed in accordance with all of the predistortion parameters;

[0044] S104,根据确定的所述预失真参数更新预失真参数索引表。 [0044] S104, the determined according to the predistortion parameter updating predistortion parameter index table.

[0045] 本发明实施例提供了一种基于DDR模型的改进预失真模型,与传统的DDR模型相比,本发明提供的预失真模型加深了记忆深度的影响,模型增强了记忆深度的影响,增强模型对功放记忆效应的补偿能力,达到不增加计算复杂度的情况下进一步提高宽带DPD性能的目的,尤其是提高了处理带宽较大信号时的处理性能。 [0045] The embodiments of the present invention provide improved DDR model based predistortion model, compared with the conventional DDR model, the predistortion model of the present invention provides a depth deepens and memory model to enhance the depth and memory, enhanced ability to compensate memory effects of the power amplifier model, to achieve the object of the case without increasing the computational complexity of further improved broadband performance DPD, in particular to improve the performance when processing large processing bandwidth signals.

[0046] 根据发明人的测试在提前配置好参数的情况下(K=7,L=4,Kb=Kc=Kd=5,Lb=Lc=Ld= 3,信源为LTE70M2C,峰均比7.5dB),传统DDR模型(OLD)的性能和改进后DDR模型(NEW,本发明所提供的预失真模型)的性能对比如图2和图3所示。 [0046] According to the inventors tested in a case where the configuration parameters in advance (K = 7, L = 4, Kb = Kc = Kd = 5, Lb = Lc = Ld = 3, the source of LTE70M2C, PAPR 7.5 dB), the performance properties of conventional DDR model (OLD) and the improved model DDR (NEW, the predistortion model of the present invention provides a) a comparison of FIGS. 2 and 3 shown in FIG.

[0047]可以理解的是,同一模型中预失真参数之所以采用不同的字母进行指代,目的是用于相互间的区分。 [0047] It will be appreciated that the predistortion parameters in the same model has been adopted for different letters refer to the purpose for distinguishing among them.

[0048] 在本发明上述实施例的基础上,更佳地,为了计算出的预失真参数的准确性,需要对第一反馈信号进行一系列的预处理,所述预处理包括对每一第一反馈信号依次进行数字下变频①DC,digital down converter)、延时对齐、增益和相位补偿。 [0048] Based on the foregoing embodiments of the present invention is, more preferably, to the accuracy of the predistortion parameters is calculated, it is necessary first of a series of pre-feedback signal, each of said pretreatment comprises a feedback signal successively ①DC digital conversion, digital down converter), alignment delay, gain and phase compensation. 利用第二反馈信号和预失真信号得出的预失真参数更加准确。 Using the second feedback signal and the predistortion signal derived predistortion parameters more accurately.

[0049] 优选地,根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数,具体包括: [0049] Preferably, the matrix is ​​formed of all the second feedback signal and determining all of the predistortion parameters based on all of the matrix formed in accordance with the predistortion signal comprises:

[0050]根据LS (最小二乘法,Least Square)算法计算所有所述第二反馈信号形成的矩阵与其共辄矩阵的第一乘积和所有所述第二反馈信号形成的矩阵和所有所述预失真信号形成的矩阵的第二乘积; [0050] According to the LS (Least Squares, Least Square) algorithm to calculate a first matrix product of all the second feedback signal and a matrix of all the second feedback signal with its co-formed matrix is ​​formed noir and all the predistortion second product formed matrix signal;

[0051] 根据所述第二乘积与所述第一乘积的比值确定所有的预失真参数。 [0051] All of the predistortion parameters is determined according to the ratio of the first and second product the product.

[0052] 在本发明实施例中,采取了LS算法进行预失真参数的计算过程,先提供一个简单的计算过程: [0052] In an embodiment of the present invention, the LS algorithm is adopted to calculate predistortion parameters of the process, to provide a simple calculation:

[0053] 由于预失真模型的目的是趋近于功放的逆模型,所以第一反馈信号和预失真信号存在以下关系式: [0053] Since the purpose of the predistortion model is close to the inverse of the amplifier model, there is a first feedback signal and the predistortion signal following relationship:

Figure CN104796364BD00081

[0055] 其中,z (η)表示η时刻输出的经过预失真处理后的预失真信号,y (η)表示η时刻输入的第一反馈信号,η表示第一反馈信号的输入时刻,1表示预失真信号的记忆时刻,a、b、c、 d表示预失真参数,L表示记忆深度,k表示多项式阶数,K表示最大多项式阶数,*表示信号的共辄,|y (η) I表示第一反馈信号的信号幅值,y* (η)表示第一反馈信号的共辄信号。 [0055] wherein, z (η) denotes a predistortion signal output from the timing after the [eta] predistortion processing, y (η) represents a first timing feedback signal input [eta], [eta] represents the input time of the first feedback signal, 1 represents pre memory timing distortion of the signal, a, b, c, d represents a predistortion parameter, L represents a memory depth, k represents a polynomial order, K represents the maximum number of polynomial order, * indicates a total Noir signal, | y (η) I a first signal represents the amplitude of the feedback signal, y * (η) of the first signal indicates co Noir feedback signal.

[0056] 可以理解的是,由于第二反馈信号是由第一反馈信号经过预处理后得到的,所以第二反馈信号与预失真信号也存在上述关系式,在得到了第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵后,上述关系式可变为ζ (n) =Uw (2),其中,ζ表示预失真信号形成的矩阵,U表示第二反馈信号形成的矩阵,w表示预失真参数。 [0056] It will be appreciated that, since the second feedback signal is a first feedback signal obtained after pretreatment, the second feedback signal and the predistortion signal is also the presence of the relationship, the feedback signal to obtain a second formation the matrix and the matrix of all the predistortion signal is formed, the above relationship may be changed ζ (n) = Uw (2), wherein, [zeta] denotes a matrix formed by the predistortion signal, U represents a matrix formed by a second feedback signal , w represents predistortion parameters.

[0057] 进一步简单说明,矩阵U的组成如下: [0057] BRIEF DESCRIPTION Further, the composition of the matrix U as follows:

[0058] U = [R,S,Q,V],R、S、和V分别代表关系式(1)中不同的动态表达式,具体的对应关系为: [0058] U = [R, S, Q, V], R, S, and V represent the relationship (1) in different dynamic expression, the specific corresponding relation is:

Figure CN104796364BD00091

[0061] Q,V结构同R和:............................ [0061] Q, V and R with the structure: ............................

Figure CN104796364BD00092

Ik-1O Ik-1O

[0062] 进一步地,关系式(2)可变化为 [0062] Further, the relationship of formula (2) may be changed to

Figure CN104796364BD00093

其中,W表示预失真参数的最小二乘解,z表示预失真信号形成的矩阵,U表示第二反馈信号形成的矩阵,Uh表示矩阵的U的共辄矩阵,根据LS算法分别确定UhU和UhZ的值,进而确定出w的值,最后确定出所有的预失真参数值。 Wherein, W represents a least-squares solution predistortion parameter, z denotes a matrix formed by the predistortion signal, U represents a matrix formed by a second feedback signal, U represents a matrix Uh co Noir matrix, respectively, is determined and UhZ The LS algorithm UhU values, and to determine the value of w, finalize all predistortion parameter values.

[0063] 可以理解的是,由于在计算预失真参数的最小二乘解时涉及到矩阵的求逆,运算比较复杂,作为本发明的简单同等替换,采用矩阵分解的方法可以避免对矩阵的求逆,比如常见的矩阵分解方法有QR (Orthogonal-triangular Decomposition)分解、奇异值分解(SVD,Singular Value Decomposition)等。 [0063] It will be appreciated that, as it relates to the inverse matrix calculating predistortion parameters least-squares solution, more complex computation, the same as a simple alternative to the present invention, a method seeking to avoid decomposition of the matrix Matrix reverse, such as the common matrix decomposition methods QR (Orthogonal-triangular decomposition) decomposition, the singular value decomposition (SVD, Singular value decomposition) and the like.

[0064] 在本发明中,一般地,每一周期内采集的所述预失真信号和所述第一反馈信号的长度一般为2000-8000。 The length of the predistortion signal and the first feedback signal [0064] In the present invention, in general, in each cycle is generally collected 2000-8000.

[0065] 为了更好地理解本发明技术方案,如图4和图5所示,下面提供一个详细的实施例: [0065] In order to better understand the technical solution of the present invention, FIGS. 4 and 5, the following embodiment provides a detailed:

[0066] 首先,对本发明详细实施例中会出现的一些字母或符合统一进行解释: [0066] First, embodiments of the present invention, some of the letters will appear in the detailed embodiment or in compliance with unified interpretation:

[0067] z (η)表示η时刻输出的经过预失真处理后的预失真信号,X (η)表示η时刻输入的原始信号,η表示原始信号的输入时刻,1表示预失真信号的记忆时刻,a、b、c、d表示预失真参数,L表示记忆深度,k表示多项式阶数,K表示最大多项式阶数,*表示信号的共辄,|x(n) I表示原始信号的信号幅值,X* (η)表示原始信号的共辄信号,#表示预失真参数的最小二乘解,ζ表示预失真信号形成的矩阵,U表示第二反馈信号形成的矩阵,Uh表示矩阵的U的共辄矩阵,y (η)表示第一反馈信号,I y (η) I表示第一反馈信号的信号幅值,y* (η)表示第一反馈信号的共辄信号; [0067] z (η) denotes a predistortion signal [eta] timing output pre-distortion processing, X (η) represent the original signal [eta] time input, [eta] represents the input timing of the original signal, the memory timing 1 represents the pre-distorted signal , a, b, c, d represents a predistortion parameter, L represents a memory depth, k represents a polynomial order, K is the maximum number polynomial order, * indicates a total Noir signal, | x (n) I represents the signal amplitude of the original signal value, X * (η) were Noir signal indicates an original signal, # represents the least squares solution predistortion parameter, [zeta] denotes a matrix formed by the predistortion signal, U represents a matrix formed by a second feedback signal, U represents a matrix Uh Noir co-matrix, y (η) represents a first feedback signal, I y (η) I represents a signal amplitude of the first feedback signal, y * (η) were represented Noir signal of a first feedback signal;

[0068] S201,在周期性滤波处理开始后,原始信号输入预失真器; [0068] S201, when the periodic filtering process is started, the original pre-distorter input signal;

[0069] S202,每一周期开始时,预失真器根据前一次更新后的LUT表(预失真索引表)及预失真模型对原始信号进行处理,输出预失真信号; [0069] S202, at the beginning of each cycle, according to the pre-distorter LUT after the previous update table (index table predistortion) pre-distortion model and the original signal is processed, the output predistortion signal;

[0070] (1),预失真器根据输入的原始信号的不同幅值在上一次更新的LUT表中提取出对应的预失真参数; [0070] (1), extracts the predistorter predistortion parameter corresponding to the last update of the LUT table, depending on the magnitude of the input original signal;

[0071] (2),根据下列公式对原始信号进行信号处理获得预失真信号; [0071] (2), the following equation is obtained predistortion signal to perform signal processing in accordance with the original signal;

Figure CN104796364BD00101

[0073] S203,将预失真信号通过数模转换模块由数字信号变为模拟信号; [0073] S203, the predistortion signal by the converter module from the digital signal into an analog signal;

[0074] S204,将模拟信号的预失真信号通过射频发射器发射到功放模块进行功放过程; [0074] S204, the pre-distortion signal of the analog signal transmitted by the RF transmitter power amplifier to a power amplifier module process;

[0075] S205,通过射频接收器接收经过功放过程的第一反馈信号; [0075] S205, the reception process through the amplifier by a feedback signal of a first radio frequency receiver;

[0076] S206,通过模数转换器将第一反馈信号由模拟信号转换为数字信号; [0076] S206, the first by an analog feedback signal from the analog signal into a digital signal;

[0077] S207,在每一周期结束时,采集本周期内生成的所有预失真信号和所有的第一反馈ig号; [0077] S207, at the end of each cycle, all the predistortion signal acquisition and all of the first feedback signal generating ig week period;

[0078] S208,对转换为数字信号的第一反馈信号一一依次进行数字下变频DDC、延时对齐、增益和相位补偿形成对应的第二反馈信号; [0078] S208, the first feedback signal into a digital signal sequentially one by one DDC digital conversion, alignment delay, gain and phase compensation corresponding to the second feedback signal is formed;

[0079] (1),所有的第二反馈信号形成的矩阵表不为U= [U1Q,…UMQQ, "TlQ,…UMQL],所有的预失真信号形成的矩阵表示为Z= [z (I),z (2),…,Z⑼]τ; [0079] (1), all of the matrix is ​​not formed in the second feedback signal as U = [U1Q, ... UMQQ, "TlQ, ... UMQL], all of the matrix formed by the predistortion signal is expressed as Z = [z (I ), z (2), ..., Z⑼] τ;

[0080] (2),根据第一反馈信号与预失真信号的存在的如下关系式: [0080] (2) The following relationships exist a first feedback signal and the predistorted signal:

Figure CN104796364BD00102

[0082] (3),将矩阵U和Z带入到上述关系式可得至Ijz (n) =Uw,w=(aki,bki,cki,dki),在这里用w来指代所有的预失真参数集合。 [0082] (3), the matrix U Z and brought into the above relationship can be obtained to Ijz (n) = Uw, w = (aki, bki, cki, dki), used here to refer to all of the w pre set of distortion parameters.

Figure CN104796364BD00103

[0083] S209,将根据所述第二反馈信号形成的矩阵U及根据预失真信号形成的矩阵Z确定预失真参数w; [0083] S209, the predistortion parameter Z w is determined according to the second feedback signal matrix U and the matrix form is formed in accordance with predistortion signal;

[0084] (1),简化后的关系式可进一步变换为将预失真信号形, 成的矩阵及第二反馈信号形成的矩阵带入到上述公式,确定预失真参数W的最小二乘解(因为此公式为超定方程组。本实施例可以采用最小二乘原理确定线性方程的解,实际过程中采用矩阵的QR分解方法、快速Cholesky分解方法求解矩阵系数或LS算法); [0084] (1), the relationship may be simplified further transformed into the predistortion signal form, into the matrix and the matrix is ​​formed into a second feedback signal to the above formula, the least squares solution to determine the predistortion parameter W ( since this formula is overdetermined the least squares principle of the present embodiment may be determined using linear equations, the actual process of a matrix QR decomposition, rapid method for solving the matrix coefficients Cholesky decomposition algorithm or LS);

[0085] S210,将确定的预失真参数发送到预失真器以对LUT表进行更新。 [0085] S210, the determined parameters of the predistortion predistorter to be sent to update the LUT table.

[0086] S211,预失真器根据更新后的LUT表对下一周期的原始信号进行数字预失真处理。 [0086] S211, the digital predistorter pre-distortion processing on the next cycle of the original signal according to the updated table LUT.

[0087] 对应上述方法本发明实施例还提供了一种数字预失真处理系统,如图6所示,该系统包括: [0087] corresponding to the above-described embodiment of the method of the present invention further provides a digital predistortion processing system, shown in Figure 6, the system comprising:

[0088] 预失真器1,用于在周期性DPD数字预失真开始后,对输入的原始信号进行预失真处理,向功放器输出对应的预失真信号;根据运算器发送的预失真参数更新预失真参数索引表,所述预失真信号根据如下预失真模型获得: [0088] 1 predistorter for periodic digital predistortion DPD after the start, the original signal inputted to the pre-distortion processing, to the pre-distortion signal corresponding to the output of the amplifier; according to the pre-update predistortion parameter sent by the operator distortion parameter index table, the predistortion predistortion signal obtained according to the following model:

Figure CN104796364BD00111

[0090] 其中,Z (η)表示η时刻输出的经过预失真处理后的预失真信号,X (η)表示η时刻输入的原始信号,η表示原始信号的输入时刻,1表示预失真信号的记忆时刻,a、b、c、d表示预失真参数,L表示记忆深度,k表示多项式阶数,K表示最大多项式阶数,*表示信号的共辄,|x (η) I表示原始信号的信号幅值,X* (η)表示原始信号的共辄信号; [0090] wherein, Z (η) represents elapsed [eta] timing output predistortion predistortion signal processed, X (η) represent the original signal [eta] time input, [eta] represents the input timing of the original signal, 1 indicates the pre-distorted signal memory timing, a, b, c, d represents a predistortion parameter, L represents a memory depth, k represents a polynomial order, K represents the maximum order of the polynomial, * indicates a total Noir signal, | x (η) I represents the original signal signal amplitude, X * (η) were Noir signal indicates the original signal;

[0091] 功放器2,用于对预失真器输出的预失真信号进行功放,并向运算器输出第一反馈信号; [0091] The power amplifier 2, for signal predistortion amplifier predistorter output, and outputs a first feedback signal computing unit;

[0092] 运算器3,用于在每一周期结束时,采集本周期内生成的所有第一反馈信号和所有预失真信号,并对所有所述第一反馈信号一一进行预处理形成对应的第二反馈信号;根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数;将所有的所述预失真参数发送到预失真器。 [0092] The arithmetic unit 3 for at the end of each cycle, all of the first feedback signal acquisition and all pre-distortion signal generated during the current cycle, and all of said first feedback signal one by one to form the corresponding pre- a second feedback signal; determining all parameters of the predistortion matrix formed of all the second feedback signal and a matrix formed in accordance with all the predistortion signal; send all the predistortion parameter to the predistorter.

[0093] 在本发明上述实施例中,提供了一个预失真处理系统,其中,将预失真器中的预失真模型在传统DDR模型的基础上进行了改进,模型增强了记忆深度的影响,目的是增强模型对功放记忆效应的补偿能力,达到不增加计算复杂度的情况下进一步提高宽带DPD性能的目的。 [0093] In the above embodiment of the present invention, there is provided a predistortion processing system, wherein the pre-distortion model predistorter has been improved on the basis of a conventional DDR model, the model is enhanced depth and memory object It is to enhance the ability to compensate memory effects of the power amplifier model, to achieve the object of the case without increasing the computational complexity of further improved broadband performance DPD.

[0094] 在本发明上述实施例的基础上,一般地,所述预处理包括对每一第一反馈信号依次进行数字下变频DDC、延时对齐、增益和相位补偿。 [0094] Based on the foregoing embodiments of the present invention is, in general, the pretreatment comprises a first feedback signal for each DDC digital conversion successively, alignment delay, gain and phase compensation.

[0095] 在本发明上述实施例的基础上,一般地,所述运算器根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数,具体包括: [0095] Based on the foregoing embodiments of the present invention is, in general, the matrix formed in accordance with the operation of all the second feedback signal and determining all of the predistortion parameter from all the predistortion signal matrix is ​​formed, in particular include:

[0096] 根据LS算法计算所有所述第二反馈信号形成的矩阵与其共辄矩阵的第一乘积和所有所述第二反馈信号形成的矩阵和所有所述预失真信号形成的矩阵的第二乘积; [0096] The second product of the first product calculating a second feedback signal is formed in accordance with all of the LS algorithm and its co noir matrix matrix matrix and the matrix of all the second feedback signal is formed and all of the predistortion signal forming ;

[0097] 根据所述第二乘积与所述第一乘积的比值确定所有的预失真参数。 [0097] All of the predistortion parameters is determined according to the ratio of the first and second product the product.

[0098] 在本发明上述实施例的基础上,一般地,每一周期内采集的所述预失真信号和所述第一反馈信号的长度一般为2000-8000。 Length [0098] Based on the foregoing embodiments of the present invention is, in general, acquired each cycle the predistortion signal and the first feedback signal is generally 2000-8000.

[0099] 本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。 [0099] skilled in the art should understand that the embodiments of the present invention may provide a method, system, or computer program product. 因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。 Thus, embodiments of the present invention may be employed entirely hardware embodiment, an entirely software embodiment, or an embodiment in conjunction with the form of software and hardware aspects. 而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。 Further, in the present invention may comprise one or more of which computer usable storage medium having computer-usable program code (including but not limited to disk storage, and optical storage) in the form of a computer program product implemented on.

[0100] 本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。 [0100] The present invention has been described in accordance with the method of Example of the present invention, apparatus (systems) and computer program products flowchart and / or block diagrams described. 应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。 It should be understood and implemented by computer program instructions and block, and the flowchart / or block diagrams each process and / or flowchart illustrations and / or block diagrams of processes and / or blocks. 可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。 These computer program instructions may be provided to a processor a general purpose computer, special purpose computer, embedded processor or other programmable data processing apparatus to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing apparatus generating in a device for implementing the flow chart or more flows and / or block diagram block or blocks in a specified functions.

[0101] 这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。 [0101] These computer program instructions may also be stored in a computer can direct a computer or other programmable data processing apparatus to function in a particular manner readable memory produce an article of manufacture such that the storage instruction means comprises a memory in the computer-readable instructions the instruction means implemented in a flowchart or more flows and / or block diagram block or blocks in a specified function.

[0102] 这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。 [0102] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps on the computer or other programmable apparatus to produce a computer implemented so that the computer or other programmable apparatus execute instructions to provide processes for implementing a process or flows and / or block diagram block or blocks a function specified step.

[0103] 显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。 [0103] Obviously, those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. 这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。 Thus, if these modifications and variations of the present invention fall within the claims of the invention and the scope of equivalents thereof, the present invention intends to include these modifications and variations.

Claims (6)

1. 一种预失真参数求取方法,其特征在于,该方法包括: 在周期性DPD数字预失真开始后,在每一周期开始时采集经过预失真处理的预失真信号和经过功放处理的第一反馈信号,根据如下预失真模型进行所述预失真处理: A method of obtaining predistortion parameters, characterized in that, the method comprising: after a periodic digital predistortion DPD start, after the acquisition of pre-distortion processing predistortion signal and the power amplification processing at the beginning of each cycle a feedback signal, as the predistortion model processing according to the predistortion:
Figure CN104796364BC00021
其中,z (η)表示η时刻输出的经过预失真处理后的预失真信号,X (η)表示η时刻输入的原始信号,η表示原始信号的输入时刻,1表示预失真信号的记忆时刻,a、b、c、d表示预失真参数,L表示记忆深度,k表示多项式阶数,K表示最大多项式阶数,*表示信号的共辄,IX (η) 表示原始信号的信号幅值,x* (η)表示原始信号的共辄信号; 在每一周期结束时,将本周期内采集的所有第一反馈信号一一进行预处理形成对应的第二反馈信号; 根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数; 根据确定的所述预失真参数更新预失真参数索引表; 其中,根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数,具体包括: 根据LS算法计算所有所述第二反馈信号形成的矩阵与 Wherein, z (η) denotes a predistortion signal after pre [eta] time distortion at the output processing, X (η) represent the original signal [eta] time input, [eta] represents the input timing of the original signal, 1 indicates the memory timing predistortion signal, a, b, c, d represents a predistortion parameter, L represents a memory depth, k represents a polynomial order, K is the maximum number polynomial order, * indicates a total signal Noir, IX (η) denotes the signal amplitude of the original signal, x * (η) were Noir signal indicates original signal; a first feedback signal all at the end of each cycle, this cycle will be collected one by one second feedback signal corresponding to the pre-formed; according to all of said second feedback matrix signal forming a matrix and in accordance with all of the predistortion signal forming all the predistortion parameter determined; wherein the matrix is ​​formed according to all of said second feedback signal; parameter updating predistortion parameters is determined according to the index table predistortion and determining all of the predistortion parameter from all the predistortion signal matrix is ​​formed, it comprises: calculating a matrix of all the second feedback signal is formed in accordance with the LS algorithm 其共辄矩阵的第一乘积和所有所述第二反馈信号形成的矩阵和所有所述预失真信号形成的矩阵的第二乘积; 根据所述第二乘积与所述第一乘积的比值确定所有的预失真参数。 Second matrix product of matrices and all the product of a first predistortion signal and the second feedback signal all co-formed matrix is ​​formed noir; a product of a ratio of the determined first of all according to the second product predistortion parameters.
2. 如权利要求1所述的方法,其特征在于,所述预处理包括对每一第一反馈信号依次进行数字下变频DDC、延时对齐、增益和相位补偿。 2. The method according to claim 1, characterized in that the pretreatment comprises a first feedback signal for each DDC digital conversion successively, alignment delay, gain and phase compensation.
3. 如权利要求1所述的方法,其特征在于,每一周期内采集的所述预失真信号和所述第一反馈信号的长度为2000-8000。 The method according to claim 1, characterized in that, in each cycle collection length of the predistortion signal and the first feedback signal is 2000-8000.
4. 一种数字预失真处理系统,其特征在于,该系统包括: 预失真器,用于在周期性DPD数字预失真开始后,对输入的原始信号进行预失真处理, 向功放器输出对应的预失真信号;根据运算器发送的预失真参数更新预失真参数索引表, 所述预失真信号根据如下预失真模型获得: 4. A digital predistortion processing system, characterized in that the system comprises: a pre-distorter for periodically after start DPD digital predistortion, the input original signal pre-distortion processing performed corresponding to the output of amplifier predistortion signal; predistortion parameter calculator according to the transmission parameters of the index table to update the predistortion, the predistortion predistortion signal obtained according to the following model:
Figure CN104796364BC00031
其中,Z (η)表示η时刻输出的经过预失真处理后的预失真信号,X (η)表示η时刻输入的原始信号,η表示原始信号的输入时刻,1表示预失真信号的记忆时刻,a、b、c、d表示预失真参数,L表示记忆深度,k表示多项式阶数,K表示最大多项式阶数,*表示信号的共辄,IX (η) 表示原始信号的信号幅值,x* (η)表示原始信号的共辄信号; 功放器,用于对预失真器输出的预失真信号进行功放,并向运算器输出第一反馈信号; 运算器,用于在每一周期结束时,采集本周期内生成的所有第一反馈信号和所有预失真信号,并对所有所述第一反馈信号一一进行预处理形成对应的第二反馈信号;根据所有所述第二反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数;将所有的所述预失真参数发送到预失真器; 其中,所述运算器根据所有所述第 Wherein, Z (η) denotes a predistortion signal after pre [eta] time distortion at the output processing, X (η) represent the original signal [eta] time input, [eta] represents the input timing of the original signal, 1 indicates the memory timing predistortion signal, a, b, c, d represents a predistortion parameter, L represents a memory depth, k represents a polynomial order, K is the maximum number polynomial order, * indicates a total signal Noir, IX (η) denotes the signal amplitude of the original signal, x * (η) were Noir signal indicates the original signal; power amplifier, the predistortion signal for output by the predistorter amplifier, and calculating a first feedback signal output; an operator for at the end of each cycle all of the first feedback signal generated in this cycle and the acquisition of all the predistortion signal, the first feedback signal and all pre-formed one by one corresponding to a second feedback signal; all formed according to the second feedback signal and determining all matrix predistortion parameters based on all the predistortion signal matrix is ​​formed; send all the predistortion parameter to a pre-distorter; wherein all of the operator according to the first 反馈信号形成的矩阵及根据所有所述预失真信号形成的矩阵确定所有的预失真参数,具体包括: 根据LS算法计算所有所述第二反馈信号形成的矩阵与其共辄矩阵的第一乘积和所有所述第二反馈信号形成的矩阵和所有所述预失真信号形成的矩阵的第二乘积; 根据所述第二乘积与所述第一乘积的比值确定所有的预失真参数。 Matrix signal forming a feedback and predistortion is determined that all parameters of all the matrix forming the predistortion signal comprises: calculating a first matrix product of all of said second feedback signal thereto co-formed matrix noir LS algorithm and according to all matrix and a second matrix product of all of the predistortion signal forming said second feedback signal is formed; determining all parameters of the predistortion according to said second product of the ratio of the first product.
5. 如权利要求4所述的系统,其特征在于,所述预处理包括对每一第一反馈信号依次进行数字下变频DDC、延时对齐、增益和相位补偿。 5. The system of claim 4, wherein said pretreatment comprises a first feedback signal for each DDC digital conversion successively, alignment delay, gain and phase compensation.
6. 如权利要求4所述的系统,其特征在于,每一周期内采集的所述预失真信号和所述第一反馈信号的长度为2000-8000。 The system as claimed in claim 4, characterized in that, in each cycle collection length of the predistortion signal and the first feedback signal is 2000-8000.
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CN105978843B (en) * 2016-05-13 2019-02-12 京信通信系统(中国)有限公司 Digital pre-distortion loop time delay method of adjustment and device
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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101175061A (en) * 2007-11-30 2008-05-07 北京北方烽火科技有限公司 Self-adapting digital predistortion method and apparatus for OFDM transmitter
CN101459636A (en) * 2007-12-12 2009-06-17 中兴通讯股份有限公司 Adaptive pre-distortion method
CN101902258A (en) * 2009-05-31 2010-12-01 大唐移动通信设备有限公司 Method and device for acquiring digital pre-distortion processing parameter
CN102017553A (en) * 2006-12-26 2011-04-13 大力系统有限公司 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
CN102082752A (en) * 2010-02-25 2011-06-01 大唐移动通信设备有限公司 Digital predistortion processing method and equipment
CN102413083A (en) * 2010-09-26 2012-04-11 电信科学技术研究院 Signal processing method and device
CN102427438A (en) * 2011-11-29 2012-04-25 电子科技大学 Parameter training method for adaptive digital pre-distortion
CN102611661A (en) * 2012-03-27 2012-07-25 电子科技大学 Predistortion device and method based on precise inverse solution memory polynomial model equation
CN102739586A (en) * 2012-06-14 2012-10-17 京信通信系统(中国)有限公司 Method, equipment and system for adjusting linear performance of predistortion
WO2012163054A1 (en) * 2011-11-16 2012-12-06 华为技术有限公司 Method and device for generating microwave predistortion signal
CN103401513A (en) * 2013-08-02 2013-11-20 武汉邮电科学研究院 Digital pre-distortion processing method and device for power amplifier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4436410B2 (en) * 2004-03-12 2010-03-24 株式会社エヌ・ティ・ティ・ドコモ Peak reduction in ofdm to use clipping and corrected constellation

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102017553A (en) * 2006-12-26 2011-04-13 大力系统有限公司 Method and system for baseband predistortion linearization in multi-channel wideband communication systems
CN101175061A (en) * 2007-11-30 2008-05-07 北京北方烽火科技有限公司 Self-adapting digital predistortion method and apparatus for OFDM transmitter
CN101459636A (en) * 2007-12-12 2009-06-17 中兴通讯股份有限公司 Adaptive pre-distortion method
CN101902258A (en) * 2009-05-31 2010-12-01 大唐移动通信设备有限公司 Method and device for acquiring digital pre-distortion processing parameter
CN102082752A (en) * 2010-02-25 2011-06-01 大唐移动通信设备有限公司 Digital predistortion processing method and equipment
CN102413083A (en) * 2010-09-26 2012-04-11 电信科学技术研究院 Signal processing method and device
WO2012163054A1 (en) * 2011-11-16 2012-12-06 华为技术有限公司 Method and device for generating microwave predistortion signal
CN102427438A (en) * 2011-11-29 2012-04-25 电子科技大学 Parameter training method for adaptive digital pre-distortion
CN102611661A (en) * 2012-03-27 2012-07-25 电子科技大学 Predistortion device and method based on precise inverse solution memory polynomial model equation
CN102739586A (en) * 2012-06-14 2012-10-17 京信通信系统(中国)有限公司 Method, equipment and system for adjusting linear performance of predistortion
CN103401513A (en) * 2013-08-02 2013-11-20 武汉邮电科学研究院 Digital pre-distortion processing method and device for power amplifier

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