Research On Robust Beamforming Technology Of Full-duplex System Based On SWIPT

The rapid development of wireless communication services has led to the increasing demand for data transmission rates in wireless communication systems,and the continued shortage of spectrum resources is also a fact and challenge that the industry must face.Therefore,in the next-generation wireless communication system,the problem of insufficient energy supply caused by excessive energy consumption and the shortage of spectrum resources all hinder the development of wireless communication services to some extent.In the process of finding a solution,energy harvesting technology and full-duplex technology have responded well to these two development bottlenecks and become a hot research field in recent years.In practical applications,it is difficult for the system to obtain perfect channel state information at the transmitter due to signal delay and error caused by quantization.Therefore,the introduction of channel estimation error is very important for studying the reliability of the system..In view of the above background significance,this paper focuses on the communication between base stations and multiple users.Based on the wireless energy-carrying technology,this paper proposes three systems for multi-input single-output uplink and downlink considering the perfect situation of channel state information.model.The user can realize the energy collection while decoding the received signal through the power distributor,and achieve synchronization of information demodulation and energy collection.For the practical application scenarios,this paper will introduce a channel estimation error with a certain upper bound,and propose a robust beamforming optimization design scheme to improve the reliability of system signal transmission.The contribution of this study is three-fold.Firstly,in the multi-user full-duplex wireless portable communication system with power splitter,this paper considers not only the interference between multiple users but also the self-interference caused by the full-duplex technology.In order to consider the actual channel situation more comprehensively and deeply,this paper introduces a channel estimation error with a certain upper bound.Double interference brings more difficulties to the stable transmission of the signal while the channel estimation error exists.Secondly,in the process of collecting energy by the power divider of the user terminal,this paper will break through the traditional linear acquisition model and adopt a more practical nonlinear acquisition model to study and propose a robust optimization scheme.Finally,the rank-one constraint is removed in the process of processing the non-convex problem by using the semi-determined relaxation algorithm.The proof results of the constraint are found to have the rank-one property,which further verifies the globality of the problem.