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

Tae Ho IM  Mi Kyung KONG  Sungwook YU  Yong Soo CHO  

IEICE TRANSACTIONS on Communications   Vol.E94-B   No.4   pp.1102-1105
Publication Date: 2011/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.1102
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
uplink multiuser systems,  MIMO,  OSIC,  QRD-M,  CSM,  

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In this letter, we propose an efficient signal detection method for uplink multiuser systems based on collaborative spatial multiplexing (CSM). The proposed method achieves near-optimal performance and shows only 0.8 dB loss at the target frame error rate (FER) of 10-2. Moreover, the error performance of each user is almost the same in the proposed method, which is an important property in a multiuser MIMO system where each user's error performance must satisfy some fixed error rate criteria.