DocumentCode :
2881271
Title :
A rate adaptive convolutional coding method for multicarrier DS/CDMA systems
Author :
Ju Mi Lee ; Song, Iickho ; Jung, Sarah ; Lee, Jooshik
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Volume :
2
fYear :
2000
fDate :
2000
Firstpage :
932
Abstract :
In this paper, a rate adaptive convolutional coding method for multicarrier direct sequence code division multiple access (DS/CDMA) systems is considered In order to accommodate a number of coding rates easily and make the encoder and decoder structure simple, we use the rate compatible punctured convolutional (RCPC) code. We obtain data throughputs at several coding rates by choosing the coding rate which has the highest data throughput in the SINR sense. To achieve maximum data throughput, a rate adaptive system based on the channel state information (the SINR estimate) is proposed. The SINR estimate is obtained by the soft decision Viterbi decoding metric. We show that the proposed rate adaptive convolutionally coded multicarrier DS/CDMA system can enhance spectral efficiency and provide frequency diversity
Keywords :
Viterbi decoding; adaptive codes; code division multiple access; convolutional codes; land mobile radio; spread spectrum communication; variable rate codes; RCPC code; SINR estimate; channel state information; coding rate; coding rates; data throughput; frequency diversity; multicarrier DS/CDMA systems; multicarrier direct sequence code division multiple access; rate adaptive convolutional coding method; rate adaptive system; rate compatible punctured convolutional code; soft decision Viterbi decoding metric; spectral efficiency; Adaptive systems; Channel state information; Convolutional codes; Decoding; Direct-sequence code-division multiple access; Multiaccess communication; Signal to noise ratio; State estimation; Throughput; Viterbi algorithm;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
MILCOM 2000. 21st Century Military Communications Conference Proceedings
Conference_Location :
Los Angeles, CA
Print_ISBN :
0-7803-6521-6
Type :
conf
DOI :
10.1109/MILCOM.2000.904067
Filename :
904067
Link To Document :
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