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Multiplexing Gain of Amplify-Forward Relaying in Wireless Multi-Antenna Relay Networks

Authors :
Gharan, Shahab Oveis
Khandani, Amir K.
Publication Year :
2009

Abstract

This paper studies the general multi-antenna multiple-relay network. Every two nodes of the network are either connected together through a Rayleigh fading channel or disconnected. We study the ergodic capacity of the network in the high SNR regime. We prove that the traditional amplify-forward relaying achieves the maximum multiplexing gain of the network. Furthermore, we show that the maximum multiplexing gain of the network is equal to the minimum vertex cut-set of the underlying graph of the network, which can be computed in polynomial time in terms of the number of network nodes. Finally, the argument is extended to the multicast and multi-access scenarios.<br />Comment: Submitted to the IEEE transaction on Information Theory in Dec. 2009

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.0912.3981
Document Type :
Working Paper