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Improved decoding of LDPC coded modulations

delete2006-05-01
delete20
PRE
AI
Y
Yaniv Nana *
E
Eran Sharon
S
Simon Litsyn
DOI：10.1109/LCOMM.2006.1633328delete
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Abstract

Abstract

En 中文
A Coded Modulation Belief Propagation (CMBP) decoder is proposed for decoding LDPC codes with multilevel modulations. The decoder takes into account statistical dependencies among bits originating in the same symbol, providing better performance than the Marginal BP (MBP) decoder. Asymptotically it converges to MAP decoding. The CMBP decoder is based on a Single-Level Coding (SLC) scheme and does not suffer from practical disadvantages of Multi-Level Coding (MLC) schemes. Furthermore, the CMBP decoder can close the capacity gap of the Bit Interleaved Coded Modulation (BICM) SLC scheme. The BICM capacity gap increases when the modulation size increases and in scenarios where Gray mapping is not possible.
Keywords:
LDPC codes
bit interleaved coded modulation
iterative decoding

Journal

IEEE Communications Letters cover
IEEE Communications Letters
IF:
4.4
Papers:
1.3W
Citations:
2.2W

Organization

No organization information available