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Indexed by:期刊论文

Date of Publication:2011-01-01

Journal:Information Technology Journal

Included Journals:EI、Scopus

Volume:10

Issue:4

Page Number:789-797

ISSN No.:18125638

Abstract:In multi-user Multiple-Input Multiple-Output (MIMO) broadcast systems, it is essential to design the precoder for co-channel interference suppression. In this study, we propose a leakage-based nonlinear precoding scheme for the MIMO broadcast system, wherein each mobile user may receive multiple data streams. In this proposed precoding scheme, the Inter-User Interference (IUI) is minimized by maximizing the Signal-to-Leakage-plus-Noise Ratio (SLNR), and the Inter-Stream Interference (ISI) is mitigated by extending the Tomlinson-Harashima Precoding (THP) algorithm into the stream domain. Since both the IUI and the ISI are mitigated at the Base Station (BS) transmitter, this precoder achieves a very simple receiver at each user, and only a power scaling factor needs to be additionally transmitted to the receiver. Moreover, it is also proved that this proposed precoder supports the multiple data streams within one user equally. Simulation results demonstrate that the proposed scheme can eliminate the interference efficiently and achieve better Bit Error Rate (BER) performance. ? 2011 Asian Network for Scientific Information.