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A digital predistortion processing method and device

A technology of digital pre-distortion and processing method, applied in the field of communication, can solve the problems of signal distortion, invalid DPD processing, etc.

Active Publication Date: 2019-11-19
COMBA TELECOM SYST CHINA LTD
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  • Abstract
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Problems solved by technology

[0006] The embodiment of the present invention provides a digital pre-distortion processing method and device to solve the problem of invalid DPD processing and subsequent signal distortion due to power control and abnormal characteristics of high and low temperature power amplifiers

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  • A digital predistortion processing method and device
  • A digital predistortion processing method and device
  • A digital predistortion processing method and device

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] see figure 2 As shown, the embodiment of the present invention provides a schematic flow chart of a digital pre-distortion processing method, and the specific implementation method includes:

[0021] Step S101, collect the input signal and output signal of the power amplifier at the current moment, the input signal is the signal after DPD processing using the DPD coefficient of the first digital pre-distortion technology.

[0022]...

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Abstract

The invention discloses a digital pre-distortion processing method and apparatus. The method comprises: an input signal and an output signal of a power amplifier at a current time are collected, wherein the input signal is a signal after DPD processing by using a first digital pre-distortion (DPD) technology coefficient; according to the input signal and the output signal, an adjacent channel power ratio (ACPR) corresponding to the first DPD coefficient and a fitting error corresponding to the first DPD coefficient are determined; whether the ACPR corresponding to the first DPD coefficient and the fitting error corresponding to the first DPD coefficient meet a set condition is determined; if none of the ACPR corresponding to the first DPD coefficient and the fitting error corresponding to the first DPD coefficient meets the set condition, a DPD coefficient generated by training is used for replacing the first DPD coefficient, wherein the DPD coefficient generated by training is obtained by training based on a plurality of second DPD coefficients before the current time. Therefore, a problem that signal distortion occurs because DPD processing fails to be done due to abnormal characteristics of the power controller and the high-low-temperature power amplifier can be solved.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a digital predistortion processing method and device. Background technique [0002] The wireless communication system adopts BPSK (Binary Phase Shift Keying, binary phase shift keying), QPSK (Quadrature Phase Shift Keying, quadrature phase shift keying), 16QAM (Quadrature Amplitude Modulation, quadrature amplitude keying) with high spectrum utilization ), 64QAM and other modulation methods. These modulation methods not only modulate the phase of the carrier, but also modulate the amplitude of the carrier. These modulation methods will generate non-constant envelope modulation signals with a large peak-to-average ratio. Some semiconductor devices of the power amplifier will work in the non-linear region, which will generate serious intermodulation components and serious non-linear distortion. One method in the prior art is to back off the power to ensure the linear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/36
CPCH04L27/368
Inventor 刘少华刁穗东
Owner COMBA TELECOM SYST CHINA LTD
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