Joint optimization of relay-precoders and decoders with partial channel side information in cooperative networks

We jointly optimize the relay-precoders and decoders with full or partial channel side information (CSI) in a cooperative network. Specifically, three different CSI assumptions are considered: 1) full CSI at the destination terminal and the relay terminals; 2) full CSI at the destination terminal an...

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Bibliographic Details
Published in:IEEE journal on selected areas in communications Vol. 25; no. 2; pp. 447 - 458
Main Authors: Yi, Zhihang, Kim, Il-min
Format: Journal Article
Language:English
Published: New York IEEE 01.02.2007
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Array signal processing
Beamforming
Channels
Decoders
Detectors
Feedback communications
Maximum likelihood decoding
Maximum likelihood detection
Networks
Optimization
Performance enhancement
Protocols
Relay
Relays
Signal detection
Signal to noise ratio
Terminals
Transmitters
ISSN:0733-8716, 1558-0008
Online Access:Get full text
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Summary:We jointly optimize the relay-precoders and decoders with full or partial channel side information (CSI) in a cooperative network. Specifically, three different CSI assumptions are considered: 1) full CSI at the destination terminal and the relay terminals; 2) full CSI at the destination terminal and partial CSI at the relay terminals; 3) partial CSI at the destination terminal and the relay terminals. We show that, under the assumption of full CSI at the destination terminal and the relay terminals, the optimum relay-precoder is the cooperative transmission beamforming and the optimum decoder is a maximum ratio combiner. Under the two partial CSI assumptions, the optimum relay-precoders and decoders work in a fashion of channel selection. It is demonstrated that the proposed optimum relay-precoders and decoders improve the performance considerably
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ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2007.070219