Code Design and Shuffled Iterative Decoding of a Quasi-Cyclic LDPC Coded OFDM System

doi:10.1016/S1007-0214(09)70015-X

CORC > 北京大学 > 信息科学技术学院

	Code Design and Shuffled Iterative Decoding of a Quasi-Cyclic LDPC Coded OFDM System
	Liu, Binbin ; Bai, Dong ; Ge, Qihong ; Mei, Shunliang
刊名	tsinghua science and technology
	2009
DOI	10.1016/S1007-0214(09)70015-X
英文摘要	In multipath environments, the error rate performance of orthogonal frequency division multiplexing (OFDM) is severely degraded by the deep fading subcarriers. Powerful error-correcting codes must be used with OFDM. This paper presents a quasi-cyclic low-density parity-check (LDPC) coded OFDM system, in which the redundant bits of each codeword are mapped to a higher-order modulation constellation. The optimal degree distribution was calculated using density evolution. The corresponding quasi-cyclic LDPC code was then constructed using circulant permutation matrices. Group shuffled message passing scheduling was used in the iterative decoding. Simulation results show that the system achieves better error rate performance and faster decoding convergence than conventional approaches on both additive white Gaussian noise (AWGN) and Rayleigh fading channels. ? 2009 Tsinghua University Press.; EI; 0; 1; 106-112; 14
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/262608]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Liu, Binbin,Bai, Dong,Ge, Qihong,et al. Code Design and Shuffled Iterative Decoding of a Quasi-Cyclic LDPC Coded OFDM System[J]. tsinghua science and technology,2009.
APA	Liu, Binbin,Bai, Dong,Ge, Qihong,&Mei, Shunliang.(2009).Code Design and Shuffled Iterative Decoding of a Quasi-Cyclic LDPC Coded OFDM System.tsinghua science and technology.
MLA	Liu, Binbin,et al."Code Design and Shuffled Iterative Decoding of a Quasi-Cyclic LDPC Coded OFDM System".tsinghua science and technology (2009).