Outage Regions and Optimal Power Allocation for Wireless Relay Networks

Details Outage Regions and Optimal Power Allocation for Wireless Relay Networks Outage Regions and Optimal Power Allocation for Wireless Relay Networks

2009-08-07

arxiv.org/abs/0908.0993v1

Computer Science

Information Theory

5 pages, 4 figures, 1 table, accepted for ITW 2009, Taormina, Sicily

Scientific paper

We study outage regions for energy-constrained multi-hop and adaptive multi-route networks with an arbitrary number of relay nodes. Optimal power allocation strategies in the sense that outage probability is minimized are derived depending on the distances between the transmit nodes. We further investigate the rate gain of adaptive multi-route and multi-hop over direct transmission. It is shown that a combined strategy of direct transmission and adaptive multi-route outperforms multi-hop for all values of rate R. It can be stated that cooperation strategies are beneficial for low-rate systems where the main goal is a very low outage probability of the network. As the rate is increased, direct transmission becomes more and more attractive.

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