In this work, a new control jamming (CJ) scheme has been proposed for a cooperative nonorthogonal multiple access (NOMA) network with optimal power allocation factors by employing decode-and-forward (DF) relay. Maximization of secrecy rate at both NOMA users with the aid of CJ under total transmit power constraint is considered as an optimization problem. In this regard, invasive weed optimization (IWO) algorithm-based approach is proposed to facilitate optimal power allocation for the considered network. In this analysis, performance metric secrecy rate is analyzed with CJ at both NOMA users by varying the location of eavesdropper with respect to the relay and jammer. In addition, the performance of fixed power allocation (FPA) and proposed power allocation (PPA) schemes is investigated with CJ and compared with jamming (J) and without jamming (WJ) conditions. Simulation result analysis specifies that secrecy performance is enhanced remarkably by CJ and PPA outperforms the FPA.

中文翻译：

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基于最优功率分配的非正交多址解码转发中继网络新型控制干扰方案

在这项工作中，通过采用解码转发 (DF) 中继，为具有最佳功率分配因子的协作非正交多址 (NOMA) 网络提出了一种新的控制干扰 (CJ) 方案。在总发射功率约束下借助 CJ 使两个 NOMA 用户的保密率最大化被认为是一个优化问题。在这方面，提出了基于侵入性杂草优化 (IWO) 算法的方法，以促进所考虑网络的最佳功率分配。在此分析中，通过改变窃听者相对于中继和干扰器的位置，在两个 NOMA 用户处使用 CJ 分析性能指标保密率。此外，使用 CJ 研究了固定功率分配 (FPA) 和提议的功率分配 (PPA) 方案的性能，并与干扰 (J) 和无干扰 (WJ) 条件进行了比较。仿真结果分析表明，CJ 显着提高了保密性能，PPA 优于 FPA。