Abstract
In this paper, the object of study is secure transmission and green energy transfer in full-duplex (FD) wireless-powered relay (WPR) secure systems, where an FD relay collects the power from radio-frequency signs and transmits the information in the face of multiple eavesdroppers. In order to improve the efficiency and safety of the contemporaneous wireless energy and information delivery, we propose a joint energy-signal- (ES-) aided secure beamforming and time-switch scheme under the self-power circulation protocol at the relay. The question formulated in this paper is to maximize the confidentiality rate according to energy restrictions at both the relay and energy receiver. As the question is non-salient and hard to resolve directly, we transform it into two sub-problems. For the first sub-problem, a two-level optimization technique is suggested to separately gain the optimal beamforming as well as the ES covariance. The extrinsic rank is a single-variable majorization question, which can be solved by single-dimensional (1D) examination. We attain an optimal solution to the inner level by a semi-definite relaxation (SDR) technique. For the second sub-problem, we again use 1D search to solve this problem. Moreover, we prove that SDR always exists as a level-1 optimal resolution. Mathematical outcomes show that the suggested plan can achieve a considerable gain of confidentiality rate by comparison with other benchmark plans.
Highlights
IntroductionCollecting power from RF signs is regarded as a promising approach to extend the longevity of power-forced wireless systems, especially concerning the high-power depletion of 5G wireless networks [1]
Collecting power from RF signs is regarded as a promising approach to extend the longevity of power-forced wireless systems, especially concerning the high-power depletion of 5G wireless networks [1].contemporary wireless information and power transfer (SWIPT) can be realized by RF signals
We study secure joint beamforming and energy signal (ES) and time switching (TS) coefficient design for the secrecy rate maximization (SRM) problem in FD-wireless-powered relay (WPR) systems; (2) An antenna multiplexing method using the configured antenna to receive information to enhance the intensity of the information signal is proposed; (3) To deal with the aforementioned difficult problem, one-dimensional (1D) search and semi-definite relaxation (SDR) techniques are used to resolve the question
Summary
Collecting power from RF signs is regarded as a promising approach to extend the longevity of power-forced wireless systems, especially concerning the high-power depletion of 5G wireless networks [1]. Reference [16] expands on [12,15], applying the S-ER strategy to the FD source for self-energy recycling and confidential information transmission, and advancing the optimal beamforming scheme. The main challenge of FD-WPR secure systems is that a relay can harvest energy when transmitting signals, but this parallelism could lead to increasing LI and information leakage. These issues have not been well addressed in the existing literature to the best of our knowledge. On the foundation of the S-ER relay protocol, we designed a novel two-phase ES-aided secure transmission scheme by jointly optimizing secure beamforming, ES, and TS coefficients to maximize the system confidentiality rate.
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