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Distributed Spatial-Temporal Precoding with Limited Feedback Hang LONG Wenbo WANG Fangxiang WANG Kan ZHENG Publication IEICE TRANSACTIONS on Communications Vol.E93-B No.2 pp.407-410 Publication Date: 2010/02/01 Online ISSN: 1745-1345 DOI: 10.1587/transcom.E93.B.407 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: cooperation, limited feedback, ZF relaying, Full Text: PDF(192.8KB)>>
Summary: Precoding techniques can be introduced into relay systems due to the similarity between relay systems and traditional multi-input-multi-output (MIMO) systems. A channel state information feedback scheme is firstly presented for the MIMO relay system in this letter, where the zero-forcing relaying protocol is proposed to be used so that the information of the equivalent channel and the relaying noise can be compressed into two coefficients. With the proposed feedback scheme, the distributed precoding is presented to be applied through two continuous transmitted vectors of the source node while the co-channel interference cancellation equalizer is used in the destination node. The system outage probability can be improved with the precoding in the source node. Furthermore, various spatial data rates can be conveniently supported by the proposed distributed spatial-temporal precoding method. | |||||
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