PROJECT TITLE :

Secure communication in multiple relay networks through decode-and-forward strategies

ABSTRACT:

During this paper, we tend to study the role of cooperative relays to provide and improve secure communication rates through decode-and-forward (DF) strategies during a full-duplex multiple relay network with an eavesdropper. We tend to consider the DF scheme as a basis for cooperation and propose many ways that implement different versions of this scheme suited for cooperation with multiple relays. Our goal is to relinquish an efficient cooperation paradigm based on the DF theme to supply and improve secrecy in a multiple relay network. We have a tendency to initial study the DF strategy for secrecy in a very single relay network. We propose a suboptimal DF with zero forcing (DF/ZF) strategy for which we tend to get the optimal power management policy. Next, we have a tendency to take into account the multiple relay problem. We propose three totally different methods primarily based on DF/ZF and obtain their achievable secrecy rates. The first strategy may be a single hop strategy whereas the other 2 methods are multiple hop strategies. In the first strategy, we have a tendency to show that it is potential to eliminate all the relays' signals from the eavesdropper's observation (full ZF), however, the achievable secrecy rate is restricted by the worst source-relay channel. Our second strategy overcomes the drawback of the primary strategy, but, with the disadvantage of enabling partial ZF solely. Our third strategy provides a cheap compromise between the first 2 methods. That's, in this strategy, full ZF is possible and the rate achieved will not suffer from the disadvantage of the first strategy. We tend to conclude our study by a collection of numerical results to illustrate the performance of each of the proposed strategies in terms of the achievable rates in different sensible eventualities.


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