Iterative Viterbi decoding, trellis shaping, and multilevel structure for high-rate parity-concatenated TCM

Author

Wang, Qi ; Wei, Lei ; Kennedy, Rodney A.

Author_Institution

Dept. of Eng., Australian Nat. Univ., Canberra, ACT, Australia

Volume

50

Issue

1

fYear

2002

fDate

1/1/2002 12:00:00 AM

Firstpage

48

Lastpage

55

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

Keywords

BCH codes; Viterbi decoding; binary codes; concatenated codes; iterative decoding; trellis coded modulation; BER; IVA; binary BCH code; complexity; error floor; high-rate parity-concatenated TCM; inner code; iterative Viterbi decoding algorithm; multilevel structure; outer code; parity-check code; trellis shaping; Australia; Bit error rate; Concatenated codes; Convolutional codes; Costs; Floors; Iterative algorithms; Iterative decoding; Parity check codes; Viterbi algorithm;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.975743

Filename

975743