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Conference Paper
Sequential Pre-coding for a MIMO Hybrid ARQ
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- Authors
- Jin Woo Kim, Chung G. Kang, B. J. Kwak, D. S. Kwon
- Issue Date
- 2009-04
- Citation
- Vehicular Technology Conference (VTC) 2009 (Spring), pp.1-5
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- While the conventional codebook is defined only for the initial transmission in the closed-loop MIMO system, this paper proposes a new retransmission structure with a sequence of multiple codebooks, rather than using a single identical codebook for every retransmission. The pre-coding matrices, in each codebook, are sequentially linked so that each one can be used for a sequential hybrid ARQ transmission attempt, without invoking any index feedback from the receiver. It has been shown that the proposed codebook structure provides a performance gain of more than 3dB over the conventional scheme in the long-term static channel.
- KSP Keywords
- Closed-loop MIMO, Hybrid ARQ, MIMO system, Performance gain, pre-coding