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A Novel Soft Output Generation Method for Spatially Multiplexed MIMO Systems  

Hur, Hoon (연세대학교 원주캠퍼스 디지털통신연구실)
Woo, Hyun-Myung (연세대학교 원주캠퍼스 디지털통신연구실)
Bahng, Seung-Jae (한국전자통신연구원 이동패킷모뎀 연구팀)
Park, Youn-Ok (한국전자통신연구원 이동패킷모뎀 연구팀)
Kim, Jae-Kwon (연세대학교 원주캠퍼스 디지털통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.4A, 2008 , pp. 394-402 More about this Journal
Abstract
In this paper, we propose a novel soft output generation method for spatially multiplexed MIMO systems. The receiver complexity of spatially mutiplexed MIMO system is in proportion to the number of candidate vectors. The ML signal detection method considers all possible vectors as candidates, thereby achieving a high performance, however, its complexity is very high. Low complexity receiver techniques involving a small number of candidate vectors, provide soft output values of low reliability. In this paper, we propose a method to improve reliability of the soft output values obtained using a small number of candidate vectors.
Keywords
Signal detection; MIMO; Soft output; LLR;
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