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Performance Analysis of Turbo Equalizer in Fading Channel  

Chung, Jae-Pil (가천의과학대학교 정보공학부)
Kim, In-Jea (가천의과학대학교 정보공학부)
Publication Information
The Journal of Korean Institute of Information Technology / v.10, no.1, 2012 , pp. 91-96 More about this Journal
Abstract
This paper investigates the performance of Turbo equalization in wireless multipath fading channels. Turbo equalization mainly consists of a SISO(soft-in soft-out) equalizer and a SISO decoder. Iterative channel estimators can improve the accuracy of channel estimates by soft information fed back from the SISO decoder. Comparing iterative channel estimators with LMS(least mean square) and RLS(recursive least squares) algorithms, which are the most common algorithms to estimate and track a time-varying channel impulse response, the iterative channel estimator with RLS converges more faster than the one with LMS. However, the difference of BER(bit error rate) performances gradually decreases as the number of iterations for Turbo equalization increases.
Keywords
turbo equalization; adaptive equalizer; LMS; RLS; multipath fading;
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