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Joint Power Splitting and Secure Beamforming Design in the Wireless-powered Untrusted Relay Networks

In this work, we maximize the secrecy rate of the wireless-powered untrusted relay network by jointly designing power splitting (PS) ratio and relay beamforming with the proposed global optimal algorithm (GOA) and local optimal algorithm (LOA). Different from the literature, artificial noise (AN) sent by the destination not only degrades the channel condition of the eavesdropper to improve the secrecy rate, but also becomes a new source of energy powering the untrusted relay based on PS. Hence, it is of high economic benefits and efficiency to take advantage of AN compared with the literature. Simulation results show that LOA can achieve satisfactory secrecy rate performance compared with that of GOA, but with less computation time.

preprint2015arXivOpen access
Mingxiong ZhaoSuili FengYuan LiuXiangfeng WangMeng ZhangHao Fu
math.ITInformation Theory
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Open access6 authors2 topics
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Mingxiong ZhaoSuili FengYuan LiuXiangfeng WangMeng ZhangHao Fu

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