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- Title
An Improved Design of Gallager Mapping for LDPC-coded BICM-ID System.
- Authors
Lin Zhou; Weicheng Huang; Shengliang Peng; Yan Chen; Yucheng He
- Abstract
Gallager mapping uses different signal points with different probabilities by assigning several labels for one signal point, and thus provides a promising approach to achieving shaping gains. An important issue in Gallager mapping is how to assign labels for signal points. In this paper, two optimized design rules for Gallager mapping of bit-interleaved coded modulation scheme with iterative decoding (BICM-ID) are proposed, where the Hamming distance among the labels for one signal point should be minimized. The extrinsic information transfer (EXIT) technique is utilized to design and analyze the proposed mapping patterns. Compared with conventional Gallager mapping, our proposed method provides extra shaping gain for the LDPC-coded BICM-ID system. And our proposed method supplies better performance than conventional uniform mapping with the same spectrum efficiency.
- Subjects
MATHEMATICAL mappings; BIT-interleaved coded modulation; ITERATIVE decoding; HAMMING distance; EXTRINSIC information transfer charts
- Publication
Electronics / Elektronika (1450-5843), 2016, Vol 20, Issue 1, p16
- ISSN
1450-5843
- Publication type
Article
- DOI
10.7251/ELS1620016Z