Title :
Soft decision decoding for multilevel coding with different mapping strategies in presence of fading
Author :
Yuan, Dong-Feng ; Sui, Ai-Fen ; Li, Zuo-Wei
Author_Institution :
Dept. of Electr. Eng., Shandong Univ., Jinan, China
Abstract :
This paper focuses on the influence of soft derision decoding on multilevel coding (MLC) schemes with different mapping strategies, named UP (Ungerboeck´s (1982) partitioning), BP (block partitioning) and MP (mixed partitioning), in Rayleigh fading channels. Based on the capacity rule, 8ASK MLC systems are constructed using punctured convolution codes. The performance comparisons are made for soft and hard decision decoding by using soft decision decoding for selected coding levels. The error propagation resulted from the lower level is also discussed. The results can present some references for the optimal criterion for MLC design in fading channels
Keywords :
Rayleigh channels; amplitude shift keying; channel capacity; channel coding; convolutional codes; iterative decoding; modulation coding; 8ASK MLC systems; Rayleigh fading channels; Ungerboeck´s partitioning; block partitioning; capacity rule; coded modulation; coding levels; error propagation; hard decision decoding; mapping strategies; mixed partitioning; multilevel coding; optimal criterion; performance comparisons; punctured convolution codes; soft decision decoding; AWGN channels; Channel capacity; Convolution; Decoding; Error correction codes; Euclidean distance; Fading; Modulation coding; Rayleigh channels; Signal mapping;
Conference_Titel :
Wireless Communications and Networking Confernce, 2000. WCNC. 2000 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6596-8
DOI :
10.1109/WCNC.2000.904843
