Journal of Systems Engineering and Electronics ›› 2012, Vol. 34 ›› Issue (10): 2142-2146.doi: 10.3969/j.issn.1001-506X.2012.10.28

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Optimized LDPC product codes design for multiple access relay systems

LI Zong-yan1,2, WU Zhan-ji1, YANG Fan1,  WANG Wen-bo1   

  1. 1. Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of 
    Posts and Telecommunications, Beijing 100876, China;
    2. School of Information and Electrical Engineering, China University of Mining & Technology, Xuzhou 221116, China
  • Online:2012-10-19 Published:2010-01-03

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Abstract:

An optimized low density parity check (LDPC) product network coding scheme is proposed for a multiple-access relay (MARC) system with two users, one relay station (RS) and one base station (BS). In this scheme, based on the extrinsic information transfer (EXIT) charts, an optimization algorithm of LDPC product codes is also put forward in order to further improve the performance of the system. Performance analysis and numerical results show that the optimized scheme significantly outperforms the original LDPC-product networking coding scheme and the conventional XOR-based network coding scheme.

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