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Improving Iterative Detection and Decoding Based on SC-MMSE with EXIT Analysis  

Nam, Jun-Yeong (한국전자통신연구원)
Kim, Seong-Rak (한국전자통신연구원)
Jeong, Hyeon-Gyu (한국전자통신연구원)
Publication Information
Information and Communications Magazine / v.24, no.12, 2007 , pp. 14-21 More about this Journal
Abstract
This paper aims to improve the design of iterative detection and decoding(IDD) based on the soft interference cancellation with minimum mean squared error(SC-MMSE) detector, which shows low performance compared to the maximum a posteriori(MAP) detector. By means of extrinsic information transfer(EXIT) chart analysis, such low performance may be attributed to that the "pure"(original) turbo principle is not always best for IDD. Thus, we propose a new IDD architecture based on the SC-MMSE detector which uses new a priori information. Simulation results show that the performance of the proposed IDD is very close to that of IDD based on the MAP detector.
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