Title :
Joint Channel Estimation and Decoding Iteration for Pilot Symbol Assisted Turbo Coded System
Author :
Chiu, Yi-Jen ; Chen, Chien-Sheng
Author_Institution :
Dept. of the Digital Recreation & Game Design, Taiwan Shoufu Univ., Tainan, Taiwan
Abstract :
A novel algorithm of iterative channel estimation and turbo decoding for pilot symbol assisted modulation (PSAM) is proposed. The proposed channel estimation is based on least squared fitting (LSF) theorem. Compared with the linear optimum MMSE (minimum mean square error) channel estimation, it doesn´t require any channel characteristic like as fading rate or noise variance. We discuss the effect of fading rate and noise variance estimation error in MMSE systems. The influence of noise variance in MMSE systems is slight, but fading rate mismatch effect is huge. The proposed system is less sensitive than MMSE system about fading rate variation.
Keywords :
channel estimation; iterative decoding; least squares approximations; modulation coding; turbo codes; decoding iteration; iterative channel estimation; joint channel estimation; least squared fitting theorem; pilot symbol assisted modulation; pilot symbol assisted turbo coded system; turbo decoding; Channel estimation; Estimation; Fading; Fitting; Iterative decoding; Noise; Turbo codes; Channel estimation; Joint iterative decoding; Least squared fitting; PSAM (Pilot Symbol Assisted Modulation); Turbo codes;
Conference_Titel :
Computer, Consumer and Control (IS3C), 2012 International Symposium on
Conference_Location :
Taichung
Print_ISBN :
978-1-4673-0767-3
DOI :
10.1109/IS3C.2012.58
