Power Allocation for Parallel Relaying System with Partial Channel State Information

Wei GUAN  Hanwen LUO  Chengyu LIN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E92-B   No.4   pp.1397-1400
Publication Date: 2009/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.1397
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
relaying,  power allocation,  partial CSI,  

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Summary: 
We introduce a novel power allocation scheme for decode-and-forward relaying system with partial channel state (CSI) information, i.e., the source knows full CSI of source-relay link but only statistical CSI of source-destination and relay-destination links. Our objective is to minimize the outage probability by jointly allocating the transmit power between the source and relays. To avoid exhaustive search, the MAOP scheme and the MMS scheme are proposed to approach the optimal allocation in the high and low signal-to-noise ratio regimes, respectively.