Title :
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
fDate :
1/1/2002 12:00:00 AM
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;
Journal_Title :
Communications, IEEE Transactions on
