NontimeSharing FullDuplex SWIPT Relay System with Energy Access Point Utilizing the idle wireless devices with energy as an additional energy access point (EAP) to supplement energy for the relay, a nontimesharing fullduplex amplification and forwarding (AF) relay system with energy access points based on radio frequency (RF) signals in wireless networks is proposed. Using AF protocol to cooperative transmit information and simultaneous wireless information and power transfer (SWIPT) technology to realize information and energy synchronous transmission in the energyconstrained relay system. The relay can eliminate the selfinterference signal through selfenergy recycling in the loop channel, and adopts power splitting scheme for information decoding and energy harvest for RF signals. Moreover, due to the nontimesharing transmission characteristics, information transmission, energy harvest and cooperative transmission are completed synchronously in a time block. Taking maximize system throughput as optimization target, jointly optimizing the relay transmit power, the relay transmit beamforming vector and the power splitting ratio, and the system transforms the original multivariate nonconvex problem into a semidefinite programming problem by using quadratic optimization, variable reduction methods and Lagrange method. Simulation experiments show that under the condition that the total energy harvested is fixed, the operation rate of the system can be promoted effectively by increasing the energy harvested from EAP. And the selfenergy recycling of the relay can promote the throughput gain of the system. The experimental results also verify that our proposal the system based on applying nontimesharing transmission protocol and SWIPT technology has more significant gains in improving system performance than HDSWIPT and FDnoSWIPT relay systems.

Performance Analysis of SWIPT Relaying Systems in the Presence of Impulsive Noise. We develop an analytical framework to characterize the effect of impulsive noise on the performance of relayassisted simultaneous wireless information and power transfer (SWIPT) systems. We derive novel closedform expressions for the pairwise error probability (PEP) considering two variants based on the availability of channel state information (CSI), namely, blind relaying and CSIassisted relaying. We further consider two energy harvesting (EH) techniques, i.e., instantaneous EH (IEH) and average EH (AEH). Capitalizing on the derived analytical results, we present a detailed numerical investigation of the diversity order for the underlying scenarios under the impulsive noise assumption. For the case when two relays and the availability of a direct link, it is demonstrated that the considered SWIPT system with blind AEHrelaying is able to achieve an asymptotic diversity order of less than 3, which is equal to the diversity order achieved by CSIassisted IEHrelaying. This result suggests that, by employing the blind AEH relaying, the power consumption of the network can be reduced, due to eliminating the need of CSI estimation. This can be achieved without any performance loss. Our results further show that placing the relays close to the source can significantly mitigate the detrimental effects of impulsive noise. Extensive Monte Carlo simulation results are presented to validate the accuracy of the proposed analytical framework.