Tomlinson-Harashima Precoding for the Downlink of Multiuser MIMO Systems

Xiao-lin CHE  Chen HE  Wen-feng LIN  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.2   pp.622-627
Publication Date: 2008/02/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.2.622
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
multiuser MIMO,  Tomlinson-Harashima precoding,  downlink,  

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In this letter, a Tomlinson-Harashima precoding (THP) scheme is proposed for the downlink of multiuser MIMO systems with multiple antennas at each receiver. Assuming single data stream communication for each user, joint transmitter and receiver design is done to maximize the signal to noise ratio (SNR) for each user. Furthermore, a heuristic user ordering algorithm is proposed to optimize the encoding order and improve the bit error rate (BER) performance. Simulation results have shown that the proposed approach is superior to some existing precoding schemes.