Title :
Block-coded modulation and multiple block-coded modulation with Viterbi decoding for fading channels
Author :
Li, Huan-Bang ; Wakana, Hiromitsu ; Tanaka, Masato
Author_Institution :
Commun. Res. Lab., Ibaraki, Japan
fDate :
2/1/2001 12:00:00 AM
Abstract :
This paper describes how block-coded modulation (BCM) and multiple BCM (MBCM) with Viterbi decoding can be designed for use in Rayleigh fading and severe Rician fading channels. New codes are developed by modifying known codes to increase the minimum symbol distance, which is one of the distances that has a strong effect on the bit error rate (BER) performance under fading channels. Combined with anti-fading techniques such as fading compensation, interleaving, and branch weighting, the new codes significantly improve BER performance. Computer simulations were used to confirm the code performance
Keywords :
Rayleigh channels; Rician channels; Viterbi decoding; block codes; channel coding; error statistics; modulation coding; BCM; BER performance; MBCM; Rayleigh fading channels; Viterbi decoding; anti-fading techniques; bit error rate performance; block-coded modulation; branch weighting; code performance; fading channels; fading compensation; interleaving; minimum symbol distance; multiple BCM; multiple block-coded modulation; severe Rician fading channels; Bit error rate; Computer simulation; Fading; Gaussian channels; Maximum likelihood decoding; Modulation coding; Rayleigh channels; Rician channels; Throughput; Viterbi algorithm;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
