Abstract
The physical layer security idea has been studied by Wyner, published since 1975 and is expanding its powerful research inthe last decade. According to information theory, these security problemsare all expressing in the form of optimal problemswith the objectivefunction of maximizing the secrecy rateor minimizing the transmission power. These optimal problemsoften have a non-convex optimal form of mathematics, so there is no way to find an global optimal solutions, recently published tournaments are usually a suboptimal approach. The main contributor to this paperis to propose a new solution to this hard problemonthe wirelessrelayingnetwork using AF technique with the occurrence of a eavesdropperstationbased on DC Programming and DCA. The experimentalpart shows the suboptimalapproachof our algorithm proposed better than the published solution.
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