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Method, device and decoder for blind equalization

A blind equalization and decoder technology, applied in the field of communication, can solve the problems of non-convergence, high error rate of the receiver, unsatisfactory equalization effect, etc., to reduce the probability of error, enhance the equalization effect, and improve the performance

Inactive Publication Date: 2010-08-18
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In the process of realizing the present invention, the inventor found that the existing blind equalization technology has the following problems: firstly, it is difficult for the equalizer to converge, or even does not converge; The bit error rate of the machine is high

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  • Method, device and decoder for blind equalization
  • Method, device and decoder for blind equalization
  • Method, device and decoder for blind equalization

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] In order to solve the problem that the existing equalization technology is difficult to converge and the equalization effect is not good after convergence, the embodiments of the present invention provide a blind channel equalization method, device and decoder.

[0035] Such as figure 2 As shown, a blind equalization method provided by an embodiment of the present invention includes:

[0036] 200. The equalizer equalizes the received symbol sequence;

[0...

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Abstract

The embodiment of the invention relates to the technical field of communication and particularly discloses a method, a device and a decoder for blind equalization in order to solve the problems that the prior art for blind equalization has difficulties in convergence and has poor equalization effect after the convergence. The method in the embodiment of the invention comprises the following steps: equalizing the received symbol sequences; carrying out the demodulating and decoding processes on the equalized symbol sequences, to generate decoded signals; carrying out the CRC (cyclic redundancy check) on the decoded signals; if errors are detected according to the CRC, re-demodulating the decoded signals and updating the equalization coefficient according to the re-demodulated signals; and re-equalizing the received symbol sequences. By modulating the output of the decoder and feeding back to a blind equalizer to update the coefficient of the blind equalizer and by carrying out the iteration method using the decoded signals for multiple times to produce the gain, the embodiment of the invention can reduce the probability of errors in judgment, ensure that the equalizer can achieve the convergence rapidly, enhance the equalization effect of the equalizer and improve the performance of the receiver.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a blind equalization method, device and decoder. Background technique [0002] In a wireless communication system, due to the complexity and variability of wireless channels, the transmission performance of the wireless communication system is greatly affected. In order to improve the transmission performance of the system, equalization technology is adopted at the receiving end. Equalization technology refers to the characteristics of the channel. The receiving end produces characteristics opposite to the channel characteristics for the signal, and is used to reduce or eliminate time-varying multipath propagation due to the channel. Signal distortion caused by characteristics. In some occasions, in order to save bandwidth, the receiver only uses the received unknown data for channel estimation to obtain channel characteristics, and adjusts the equalizer tap coeff...

Claims

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Application Information

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IPC IPC(8): H04L25/03
Inventor 李卫华
Owner HUAWEI TECH CO LTD
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