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http://dx.doi.org/10.7840/KICS.2012.37A.5.311

Bit-mapping Schemes of LDPC Codes for Partial Chase Combining  

Joo, Hyeong-Gun (한양대학교 전자컴퓨터통신공학과 부호 및 통신 연구실)
Shin, Dong-Joon (한양대학교 전자컴퓨터통신공학과 부호 및 통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.5A, 2012 , pp. 311-316 More about this Journal
Abstract
In this paper, a bit-mapping scheme is proposed for partial Chase combining in LDPC-coded systems. Contrary to the previously known bit mapping that assigns the information bits to more reliable channels, the proposed mapping assigns the codeword bits of irregular LDPC codes to distinct Gaussian channels by considering the characteristics of LDPC codes and channels. The recursion equation for partial Chase combining is derived by using the density evolution technique, based on it, the best bit mapping among the various bit-mapping schemes is derived, and the validity of them is confirmed through simulation.
Keywords
Bit-mapping scheme; density evolution technique; LDPC code; partial Chase combining;
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