Title :
Set partitioning for multilevel codes on a Rayleigh-fading channel
Author :
Gu, Young-Mo ; Lee, Choong Woong
Author_Institution :
School of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
2/1/1998 12:00:00 AM
Abstract :
On a Rayleigh-fading channel, multilevel codes achieve larger Hamming distances than single-level codes at comparable decoder complexity and bandwidth efficiency by employing a multistage decoder. Typically, multilevel codes are designed using Ungerboeck´s (1982) set partitioning. This results in a large path multiplicity that degrades the code performance significantly. In order to overcome the performance degradation, we propose a set partitioning method that greatly reduces the path multiplicity
Keywords :
Rayleigh channels; codes; computational complexity; decoding; fading; modulation coding; phase shift keying; Hamming distances; Monte Carlo computer simulation; Rayleigh-fading channel; bandwidth efficiency; code performance degradation; decoder complexity; multilevel codes; multistage decoder; path multiplicity reduction; set partitioning; three-level coded 8-PSK; AWGN channels; Bandwidth; Convolutional codes; Degradation; Error probability; Hamming distance; Maximum likelihood decoding; Phase shift keying; Rayleigh channels; Signal detection;
Journal_Title :
Communications, IEEE Transactions on
