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In this paper, the problem of energy saving in cooperative multi-hop wireless sensor networks is studied with the constraint of a given outage probability. In these networks, each node transmits its signal to the next mcoop nodes on the route ending with the sink node. Rice and Nakagami channels are considered. In this paper, we derive the upper bound of the end to end (e-2-e) outage probability for...
Distributed MIMO or Cooperative transmission is an appropriate way to use in sensor networks that have constraint on energy consumptions. In this paper, we consider a minimum end to end (e-2-e) total power allocation while satisfying an e-2-e given maximum outage probability as the constraint for a cluster-based multi-hop cooperative network. To simplify this optimization problem, we apply some approximations...
This letter derives a simple and uniform closed-form expression for the asymptotic outage probability of the decode-and-forward relaying transmission in generalized fading channels, including Rayleigh, Ricean, Nakagami-q, and Nakagami-m fading. Various numerical results show that the derived uniform outage probabilities are tight approximation in the high SNR regime. The closed-form expression is...
In this paper, we analyze the performance of a multi-branch dual-hop fixed gain relay system with maximal ratio combiner (MRC) at the destination operating over independent Nakagami-m fading channels. We first derive the probability density function (PDF) of the signal to noise ratio (SNR) of the relay branch, from which the exact closed form expressions for the moments of MRC's output SNR are obtained...
It is well known that the cooperation among nodes can improve the performance of a wireless network. In this letter we analyze the outage probability behaviour of a relay network in Nakagami-m fading channels. A closed-form solution for the outage probability is derived. When m=1, the results are applicable for Rayleigh fading. Computer simulations confirm the presented mathematical analysis
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