Joint low density parity-check coding and linear precoding for Rayleigh fading channels

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

We introduce a serially concatenated scheme consisting of outer low density parity-check (LDPC) coding and inner complex field linear precoding (LP) for reliable communications over wireless fading channels. We compare the ergodic capacities of the uncorrelated Rayleigh flat fading channel with and without LP, and show that for constellation-constrained inputs LP can bring considerable signal-to-noise ratio (SNR) gains even with precoders of size as small as 2 or 4. We further derive both optimal and low-complexity sub-optimal iterative decoding algorithms and employ extrinsic information transfer (EXIT) charts to approximately evaluate threshold values of their performance. Simulations reveal that when BPSK is used, the novel LDPC-LP scheme results in up to 1.3dB (1.0dB) gain at rate 1/2 for regular (irregular) codes with a medium block size.

Original languageEnglish (US)
Title of host publication2006 IEEE Conference on Information Sciences and Systems, CISS 2006 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1008-1013
Number of pages6
ISBN (Print)1424403502, 9781424403509
DOIs
StatePublished - Jan 1 2006
Event2006 40th Annual Conference on Information Sciences and Systems, CISS 2006 - Princeton, NJ, United States
Duration: Mar 22 2006Mar 24 2006

Publication series

Name2006 IEEE Conference on Information Sciences and Systems, CISS 2006 - Proceedings

Other

Other2006 40th Annual Conference on Information Sciences and Systems, CISS 2006
CountryUnited States
CityPrinceton, NJ
Period3/22/063/24/06

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