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Digital predistortion processing method and apparatus

A technology of digital predistortion and processing method, applied in the field of communication, can solve the problems of complex digital predistortion model of power amplifier, permanent damage of power amplifier, unstable DPD, etc.

Active Publication Date: 2018-01-19
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in practical applications, as the bandwidth increases, the digital predistortion model of the power amplifier becomes more and more complex. cause permanent damage

Method used

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  • Digital predistortion processing method and apparatus
  • Digital predistortion processing method and apparatus
  • Digital predistortion processing method and apparatus

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Embodiment Construction

[0059] The application will be described in further detail below in conjunction with the accompanying drawings.

[0060] figure 1 It is a schematic structural diagram of a digital pre-distortion processing method provided by an embodiment of the present application. Such as figure 1 In the schematic structural diagram of the digital predistortion method shown, it mainly includes a DPD processing unit 101 , a PA 102 , a data acquisition unit 103 , and a DPD coefficient matrix determination unit 104 . The input signal generates the input signal of the PA through the DPD processing unit, the input signal of the PA is amplified by the PA to generate the output signal of the PA, and generates a feedback signal, and the data acquisition unit 103 sends the acquired input signal and the feedback signal of the PA to To the DPD coefficient matrix determining unit 104 , the DPD coefficient matrix determining unit 104 determines the required DPD coefficient matrix according to the input...

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Abstract

The invention provides a digital predistortion processing method and apparatus. The method comprises the following steps: obtaining an input signal of a digital predistortion DPD module, and the inputsignal and a feedback signal of a power amplifier; determining a first construction matrix F1 according to the feedback signal and a preset predistortion memory polynomial; determining a first matrixU1 according to the first construction matrix F1, and if it is determined that the condition number of the first matrix U1 is greater than a preset first threshold, adjusting the first construction matrix F1 until the condition number of the adjusted first construction matrix F1 is smaller than a preset second threshold, wherein the first matrix U1 is a product of a conjugate matrix of the firstconstruction matrix F1 and the first construction matrix F1; and performing predistortion processing on the input signal according to a digital predistortion coefficient matrix A corresponding to theadjusted first construction matrix F1.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a digital predistortion processing method and device. Background technique [0002] With the development of wireless communication, its envelope fluctuation and peak-to-average ratio are getting larger and larger, and the radio frequency system circuit produces a large amount of nonlinear distortion, which reduces the communication quality. The nonlinear distortion of the signal mainly comes from the nonlinearity of the power amplifier (Power Amplifier, PA), especially the electrical memory effect and the dynamic nonlinear effect produced by the broadband radio frequency power amplifier. Current linearization methods for power amplifiers mainly include manufacturing power amplifier devices with higher linearization, peak-to-average ratio suppression methods, and digital pre-distortion (Digital Pre-Distortion, DPD) methods. Among them, the DPD method has hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49G06F17/16
CPCG06F17/16H04L25/49
Inventor 吴卓智刁穗东
Owner COMBA TELECOM SYST CHINA LTD