Research on the High Symbol Rate ISI Transmission and the Detection/Decoding Algorithm of the Coded ISI System

doi:10.13190/jbupt.200706.60.026

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2007, Vol. 30 ›› Issue (6): 60-64.doi: 10.13190/jbupt.200706.60.026

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Research on the High Symbol Rate ISI Transmission and the Detection/Decoding Algorithm of the Coded ISI System

ZHANG Xi-lin1, LIU Hai-tao2, LI Dao-ben1

1. Key Laboratory of Information Processing and Intelligent Technology, Beijing University of Posts and Telecommunications Beijing 100876, China; 2. Department of Communications Engineering, Civil Aviation University of China, Tianjin 300300, China

Received:2007-03-13 Revised:2007-09-11 Online:2007-12-31 Published:2007-12-31
Contact: ZHANG Xi-lin

Abstract

Abstract:

The performance of the high symbol rate intersymbol interference (ISI) transmission with maximum likelihood sequence detection (MLSD) utilized at receiver is researched. Compared with the Mary-quadrature amplitude modulation (M-QAM) non-ISI system that has the same spectral efficiency, the bit error rate performance of the ISI system outperforms gradually with the spectral efficiency increasing. The optimal algorithm of the coded ISI system is proposed that is iteratively soft-in soft-out joint detection and decoding under maximum a posterior (MAP) criterion. Simulation results show that optimal algorithm obtains the optimal coding gain for it fully utilizing the encoding constraints formed by ISI.

Key words: intersymbol interference, maximum likelihood sequence detection, maximum a posteriori probability, soft-in soft-out, iterative decoding

CLC Number:

TN929.53

ZHANG Xi-lin1, LIU Hai-tao2, LI Dao-ben1. Research on the High Symbol Rate ISI Transmission and the Detection/Decoding Algorithm of the Coded ISI System[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(6): 60-64.

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Research on the High Symbol Rate ISI Transmission and the Detection/Decoding Algorithm of the Coded ISI System

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