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Method for improving digital pre-distortion processing speed

A digital pre-distortion and processing speed technology, applied in the field of digital pre-distortion, can solve the problems of reducing the capacity and coverage of mobile communication systems, difficulty in producing effects, and interference of adjacent frequency bands

Inactive Publication Date: 2013-03-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

All the above factors have affected the effect of the traditional pre-distortion technology implementation, making it difficult for the pre-distortion technology to produce better results under the conditions of fast-changing signals, and cause greater interference to adjacent frequency bands, thereby reducing the mobile communication system. capacity and coverage

Method used

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  • Method for improving digital pre-distortion processing speed
  • Method for improving digital pre-distortion processing speed
  • Method for improving digital pre-distortion processing speed

Examples

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Embodiment

[0041] figure 1 It is an overall hardware block diagram for implementing digital pre-distortion processing in this embodiment, including a serial processing device, a parallel processing device, a transmitting chain, a feedback chain, a power amplifier and an antenna.

[0042] Such as figure 2 As shown, the method for improving the digital pre-distortion processing speed of the present embodiment comprises the following steps:

[0043] (1) The parallel processing device continuously captures the input signal of the power amplifier and the output signal of the power amplifier, and transmits them to the serial processing device;

[0044](2) The serial processing device calculates the autocorrelation matrix R according to the power amplifier model and the LS algorithm principle yy and the cross-correlation matrix R yz ;

[0045] Assume z ( n ) = Σ k = ...

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Abstract

The invention discloses a method for improving the digital pre-distortion processing speed. The method comprises steps of continuously capturing amplifier input signals and amplifier output signals by using a parallel processing device and transmitting amplifier input signals and amplifier output signals to a series processing device; calculating an autocorrelation matrix Ryy and a cross-correlation matrix Ryz in accordance with an amplifier model and a Least Square (LS) algorithm principle by using the series processing device; calculating a pre-distortion coefficient matrix after obtaining the Ryy and the cross-correlation matrix Ryz; and receiving the pre-distortion coefficient matrix by using the parallel processing device, conducting the pre-distortion treatment for input signals, and transmitting the input signals to a transmitting chain. By the aid of the method, the change of signals can be tracked quickly during the actual application, and the out-of-band interference can be reduced.

Description

technical field [0001] The invention relates to the digital pre-distortion technology of a power amplifier (power amplifier), in particular to a method for improving the processing speed of the digital pre-distortion. Background technique [0002] With the development of wireless communication, the signal bandwidth is getting wider and wider, and its envelope fluctuation and peak-to-average ratio are getting bigger and bigger, which puts forward higher linearity requirements for broadband signaling channels, especially mixers and power amplifiers. This is mainly because semiconductor devices have inevitable nonlinear characteristics under large signals. When the broadband transmitter works in the nonlinear region, serious intermodulation products will be generated, which can cause mutual interference between signals in the working frequency band. , generating unwanted spectral leakage outside the operating frequency band. [0003] The power amplifier is an essential part in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49
Inventor 杨俊
Owner SOUTH CHINA UNIV OF TECH
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