cooperative networks;
feedback communication;
channel side information;
diversity;
D O I:
10.1109/JSAC.2007.070219
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
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.
机构:Computer Vision/Image Processing Laboratory, Department of Electrical Engineering, Technical University of Nova Scotia, Nova Scotia, B3J 2X4, Halifax
机构:Computer Vision/Image Processing Laboratory, Department of Electrical Engineering, Technical University of Nova Scotia, Nova Scotia, B3J 2X4, Halifax