Iterative Viterbi decoding, trellis shaping, and multilevelstructure for high-rate parity-concatenated TCM
Qi Wang
Lei Wei
Kennedy, R.A.
Dept. of Eng., Australian Nat. Univ., Canberra, ACT;
This paper appears in: Communications, IEEE Transactions on
Publication Date: Jan 2002
Volume: 50,
Issue: 1
On page(s): 48-55
ISSN: 0090-6778
References Cited: 34
CODEN: IECMBT
INSPEC Accession Number: 7164997
Digital Object Identifier: 10.1109/26.975743
Current Version Published: 2002-08-07
Abstract
We define and apply a new algorithm called the iterative Viterbi
decoding algorithm (IVA) to decode a high-rate parity-concatenated TCM
system in which a trellis code is used as the inner code and a simple
parity-check code is used as the outer code. With trellis shaping, the
IVA can achieve a performance 1.25 dB away from the Shannon limit at a
BER of 3×10-5 with low complexity. By augmenting the
system with a binary BCH code, the error floor can be reduced to
10-9 with very little additional cost
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