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Performance of Turbo Coded OFDM Systems in W-CDMA Wireless Communication Channel  

Shin, Myung-Sik ((주)지티씨)
Yang, Hae-Sool (호서대학교 벤처전문대학원)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.10, no.4, 2010 , pp. 183-191 More about this Journal
Abstract
In the recent digital communication systems, the performance of Turbo Code used as the error correction coding method depends on the interleaver size influencing the free distance determination and the iterative decoding algorithms of the turbo decoder. However, some iterations are needed to get a better performance, but these processes require a large time delay. Recently methods of reducing the number of iteration have been studied without degrading original performance. In this paper, the new method of combining ME (Mean Estimate) stopping criterion with SDR (sign difference ratio) stopping criterion among previous stopping criteria is proposed, and the fact of compensating each method's missed detection is verified. Faster decoding is realized that about 1~2 time iterations to reduced through adopting this method into serially concatenated both decoders. System Environments were assumed W-CDMA forward link system with intense MAI (multiple access interference).
Keywords
DS-CDMA; ME; SDR; W-CDMA;
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