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A Signal Detection Method for Uplink Multiuser Systems Based on Collaborative Spatial Multiplexing  

Im, Tae-Ho (중앙대학교 전자전기공학부 디지털통신연구실)
Kim, Yeong-Jun (중앙대학교 전자전기공학부 디지털통신연구실)
Jung, Jae-Hoon (중앙대학교 전자전기공학부 디지털통신연구실)
Cho, Yong-Soo (중앙대학교 전자전기공학부 디지털통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.2C, 2010 , pp. 229-237 More about this Journal
Abstract
The conventional detection methods developed for spatially-multiplexed MIMO systems such as OSIC and QRD-M show performance difference for each user depending on the order of detection when they are applied to detection of multi-user signals in uplink multiuser systems based on collaborative spatial multiplexing. In this paper, a signal detection method for uplink multiuser systems based on collaborative spatial multiplexing is proposed to provide similar performance for each user while its performance is close to the case of ML detection. Compared with QRD-M method, computational complexity of the proposed signal detection method is similar in the case of QPSK, and significantly lower in the case of high modulation order with 16-QAM and 64-QAM.
Keywords
CSM (Collaborative Spatial Multiplexing); Uplink multiuser system; Signal detection; OSIC; QRD-M;
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