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M-Ary Soft Information Relaying of Distributed Turbo Codes

Sung Kwon HONG, Jong-Moon CHUNG, Daehwan KIM

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Summary :

In this letter, an M-ary extension to the soft information relaying (SIR) scheme is derived for distributed turbo codes (DTCs) to enable higher data rate wireless communications with extended ranges. The M-ary based SIR design for DTCs is based on constructing a revised mapping constellation of the signals for calculating metrics from the soft mapping symbols. The numerical results show that DTCs using the proposed M-ary SIR with gray mapped quadrature phase shift keying (QPSK) provides a significant 5 dB performance gain over hard information relaying (HIR) DTCs at the 10-3 bit error rate (BER) level.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E94-A No.2 pp.869-871
Publication Date
2011/02/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E94.A.869
Type of Manuscript
LETTER
Category
Coding Theory

Authors

Keyword

SIR,  DTC,  HIR