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Linear Precoding Based on Sub-Channel Permutation in Post-Combining MIMO-HARQ Systems
IEICE TRANSACTIONS on Communications
Publication Date: 2006/11/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
MIMO, HARQ, linear precoding, MMSE, ZF, channel state information,
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A powerful HARQ-based linear precoding scheme is proposed to utilize the flexibility of post-combining HARQ strategy in MIMO communications systems. The scheme selects the appropriate symbols and transmit powers for each eigen-mode to acquire more performance gains. Simulation results show that the proposed scheme achieves about 5.5 dB signal-to-noise ratio gains over original spatial multiplexing scheme at an average bit error rate of 10-4. Furthermore, the gap between the two schemes increases with the number of transmissions.