An Improved Scheme on a Linear Pre-Coding Method of Multi-User MIMO Downlink Systems

Yinkuo MENG  Qinye YIN  Le DING  

IEICE TRANSACTIONS on Communications   Vol.E90-B   No.3   pp.681-684
Publication Date: 2007/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.3.681
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
MIMO,  multi-user,  downlink,  linear precoding,  power allocation,  

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An improved signal-to-jamming and noise ratio (SJNR) method is proposed for the linear precoding of multiuser MIMO downlink systems. To well balance suppression of co-channel interference and suppression of noise, the proposed method modifies the noise variance term to argument of a piecewise linear function, and then enhances the suppression of noise. A dynamic power allocation scheme is also introduced to further decrease the overall average bit error rate of the system. Simulation results prove the effectiveness of the proposed scheme.