DocumentCode :
3626574
Title :
Effects of Transmit Beamforming on the Capacity of Multi-Hop MIMO Relay Channels
Author :
Erhan Yilmaz;M. Oguz Sunay
Author_Institution :
Department of Mobile Communications, Institut Eur?com, Sophia-Antipolis, France
fYear :
2007
Firstpage :
1
Lastpage :
5
Abstract :
In this paper we investigate multi-hop fading relay channels where the source, the destination and the multiple relay nodes are all equipped with multiple antennas. We study the ergodic capacities of multiple relay networks based on Amplify-and- Forward (AF) and Decode-and-Forward (DF) relaying modes. We examine multi-user beamforming (MU-BF), where each data stream is assumed to be matched to a specified relay node, based on the conventional eigen-mode transmission for both modes, and derive ergodic capacity expressions. We also examine the impact of the number of selected relay nodes on the network capacity both for modes of relaying. We show that by using MU-BF at the source node and a maximum number of relay nodes selected for cooperation, the network gains from multiplexing, while beyond that number of cooperating relay nodes, it only gains from relay selection.
Keywords :
"Array signal processing","MIMO","Relays","Decoding","Fading","Transmitting antennas","Power system relaying","Mobile communication","Land mobile radio","Mobile antennas"
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on
ISSN :
2166-9570
Print_ISBN :
978-1-4244-1143-6
Electronic_ISBN :
2166-9589
Type :
conf
DOI :
10.1109/PIMRC.2007.4394701
Filename :
4394701
Link To Document :
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