Performance of Turbo Code in WB-CDMA Radio Links with Estimated Channel Variance

Hyeon Woo LEE
Chang Soo PARK
Yu Suk YUN
Seong Kyu HWANG

Publication
IEICE TRANSACTIONS on Communications   Vol.E81-B    No.12    pp.2514-2518
Publication Date: 1998/12/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on the Latest Development of Telecommunication Research)
Category: 
Keyword: 
turbo code,  convolutional code,  Reed-Solomon code,  MAP algorithm,  WB-CDMA,  

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Summary: 
In this paper, we consider the applicability of turbo code for future third generation (3G) mobile telecommunication systems. Futhermore, we propose a simple method of estimating the channel variance which is necessary for the MAP (Maximum A Posteriori) decoding algorithm. We compare the performance of turbo code with a known channel variance, conventional variance estimate and variance estimated by our proposed technique. We show that our variance estimation scheme is adequate for 3G WB-CDMA mobile systems without degradation of turbo code performance.