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2008

Low-Rate Repeat-Zigzag-Hadamard Codes

8 years 3 months ago
Low-Rate Repeat-Zigzag-Hadamard Codes
In this paper, we propose a new class of low-rate error correction codes called repeat-zigzag-Hadamard (RZH) codes featuring simple encoder and decoder structures, and flexible coding rate. RZH codes are serially concatenated turbo-like codes where the outer code is a repetition code and the inner code is a punctured zigzag-Hadamard (ZH) code. By analyzing the code structure of RZH codes, we prove that both systematic and nonsystematic RZH codes are good codes, in the sense that for an RZH code ensemble, there exists a positive number 0 such that for any binary-input memoryless channel whose Bhattacharyya noise parameter is less than 0, the average block error probability of maximum-likelihood (ML) decoding approaches zero. Two decoding algorithms--serial and parallel decoders for RZH codes--are proposed. We then employ the extrinsic information transfer (EXIT) chart technique to design irregular RZH codes. Results show that the optimized irregular RZH codes exhibit a performance tha...
Kai Li, Guosen Yue, Xiaodong Wang, Li Ping
Added 15 Dec 2010
Updated 15 Dec 2010
Type Journal
Year 2008
Where TIT
Authors Kai Li, Guosen Yue, Xiaodong Wang, Li Ping
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