Improved decoding of LDPC coded modulations

Yaniv Nana; Eran Sharon; Simon Litsyn

doi:10.1109/LCOMM.2006.1633328

Improved decoding of LDPC coded modulations

Yaniv Nana^*, Eran Sharon, Simon Litsyn

^*Corresponding author for this work

School of Electrical Engineering

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	375-377
Number of pages	3
Journal	IEEE Communications Letters
Volume	10
Issue number	5
DOIs	https://doi.org/10.1109/LCOMM.2006.1633328
State	Published - May 2006

Keywords

Bit interleaved coded modulation
Iterative decoding
LDPC codes

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10.1109/LCOMM.2006.1633328

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abstract = "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.",

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AB - 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.

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Improved decoding of LDPC coded modulations

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Keywords

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