KR960020020A

KR960020020A - Receiver of Concatenated Coding System

Info

Publication number: KR960020020A
Application number: KR1019940029215A
Authority: KR
Inventors: 박영록
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1994-11-09
Filing date: 1994-11-09
Publication date: 1996-06-17

Abstract

본 발명은 RS(Reed-Solomon)부호화 트렐리스 부호를 연접해서 사용하는 연접 부호화 시스템의 수신기에서 전송시에 발생되는 에러의 확률을 줄여 시스템의 성능을 향상시키기 위한 것으로, 이를 위하여, 채널을 통해 수신되는 신호를 변형 비터비 복호화하여 에러확률이 가장 낮은 두개의 경로로 나누어 출력하는 변형 비터비 복호기(10), 이 변형 비터비 복호기(10)로 부터 에러 확률이 가장 낮은 경로로 출력되는 신호를 복호화하여 에러를 정정하는 최상 복호 경로수단(20), 상기 변형 비터비 복호기(10)로 부터 에러 확률이 두번째로 낮은 경로로 출력되는 신호를 복호화하여 에러를 정정하는 준최상 복호 경로수단(30), 및 상기 최상 복호 경로 수단(20)과 준최상 복호 경로수단(30)의 복호 실패(Decoding Failure)의 여부에 따라 상기 최상 복호 경로수단(20)과 준최상 복호 경로수단(30)으로 부터 출력되는 신호를 선택하여 출력하는 출력 선택수단(40)을 구비한 것이다.The present invention is to improve the performance of the system by reducing the probability of errors occurring during transmission in a receiver of a concatenated coding system using concatenated RS (Reed-Solomon) encoding trellis code. The modified Viterbi decoder 10 decodes the received signal into two paths having the lowest error probability and outputs the signal output from the modified Viterbi decoder 10 with the lowest error probability. Decoded best path means 20 for decoding and correcting errors, Sub-best decoded path means 30 for correcting errors by decoding a signal outputted from the modified Viterbi decoder 10 with the second lowest error probability. And the best decoding path means 20 and the sub-best according to the decoding failure of the best decoding path means 20 and the sub-best decoding path means 30. No. be provided with a output selection means 40 for selecting and outputting a signal outputted from the path means (30).

따라서, 본 발명은 비터비 복호기가 에러 확률이 가장 낮은 두개의 경로, 즉 최상 복호 경로 뿐아니라 준최상 복호 경로의 결과도 출력하므로 복호화 과정에서의 오류로 인해 발생된 군집 에러에 의한 영향을 줄이고, 준최상 복호 경로를 통해 다시 한번 복호할 기회를 주므로 좀더 낮은 에러 확률을 얻을 수 있는 효과가 있다.Therefore, in the present invention, since the Viterbi decoder outputs the results of the two paths having the lowest error probability, that is, the best decoding path as well as the sub-best decoding path, the effect of the cluster error caused by the error in the decoding process is reduced. The sub-best decoding path gives the opportunity to decode once again, which results in a lower error probability.

Description

Receiver of Concatenated Coding System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명의 바람직한 실시예에 따른 연접 부호화 시스템의 수신기에 대한 블럭구성도.2 is a block diagram of a receiver of a concatenation coding system according to a preferred embodiment of the present invention.

Claims

Concatenating a RS (Reed-Solomon) encoded trellis code so that a user is connected to a receiver of a concatenated encoding system; Deformed Viterbi decoder which decodes the signal received through the channel into two paths having the lowest error probability by deforming the modified Viterbi: Error by decoding the signal outputted by the path having the lowest error probability from the modified Viterbi decoder Best decoding path means for correcting; Sub-best decoding path means for correcting an error by decoding a signal outputted from the modified Viterbi decoder with a path having the second lowest error probability, and decoding failure of the best decoding path means and the sub-best decoding path means. And an output selection means for selectively outputting a signal output from the best decoding path means and the sub-best decoding path means based on whether or not.

The deinterleaver and the signal output from the deinterleaver according to claim 1, wherein the best decoding path means deinterleaves to disperse clustering errors of signals outputted from the modified Viterbi decoder on a path having the lowest error probability. And a RS decoder configured to perform RS decoding to correct the error.

2. The apparatus of claim 1, wherein the sub-best decoding path means is deinterleaved from the modified Viterbi decoder to other deinterleavers to deinterleave the clustering errors of signals output from the path having the second lowest error probability. A receiver of a concatenation coding system, characterized in that it is configured with another RS decoder to correct an error by RS decoding the signal output from the receiver.

4. The output device according to any one of claims 1 to 3, wherein the output selecting means selects an output of the best decoding path means when a decoding failure does not occur in the best decoding path means, and the output of the best decoding path means. And means for selecting an output of the sub-best decoding path means when a decoding failure occurs in the means and no decoding failure occurs in the sub-best decoding path means.

5. The receiver of claim 4, wherein the output selecting means erases both output signals when a decoding failure occurs simultaneously in the best decoding path means and the sub-best decoding path means.

※ Note: The disclosure is based on the initial application.