Multipoint Simultaneous Wireless Information And Power Transfer Strategy Based On MIMO Broadcast Technology

With the development of Io T in recent years,the number of mobile devices in the Internet has exploded.However,the traditional power supply methods(e.g.,cable-powered and batterypowered)have become an important constraint to the development of wireless communication.Simultaneous Wireless Information and Power Transfer(SWIPT)is rapidly developing in this environment,in which the transmitter transmits RF signals carrying information to the receiver to transmit energy and information.Multiple in multiple out(MIMO)technology is the main means to improve the capacity and reliability of wireless communication systems,so the integration of SWIPT technology with MIMO technology is a worthy research direction nowadays.In addition,at this stage,the application of SWIPT technology is usually considered only for the energy and information transmission in the downlink transmission phase,however,in some information acquisition networks most of the cases require a large uplink transmission rate and a low requirement for the downlink transmission rate.To address the above situation,this paper constructs a single-point duplex MIMO-SWIPT system model and a multi-point MIMO-SWIPT system model,and studies the application of SWIPT technology to the single-point transmission and multi-point transmission of the upstream and downstream transmission phases of MIMO systems,which are summarized in the paper as follows.First,the RF energy harvesting technology,the single input single output(SISO)SWIPT system,and the SWIPT system in MIMO are studied in depth.Based on the study of the above technologies,a model of MIMO-SWIPT system with single-point duplex is constructed.Second,the transmission strategy of the single-point duplex MIMO-SWIPT system model is studied,and the optimal resource allocation coefficient is designed based on the "dichotomous method" and "enumeration method",and the optimal transmission strategy under different scenarios is designed through simulation analysis.The optimal transmission strategy under different scenarios is designed through simulation analysis.Based on the study of single-point MIMO-SWIPT,a multi-point MIMO-SWIPT system model is constructed,and theoretical derivation of the energy and information cotransmission formulas for the upstream and downstream transmission phases is carried out to derive the theoretical model,and MATLAB simulation analysis is used to prove the reasonableness of the model.Finally,the resource allocation problem in the multipoint MIMO-SWIPT system is studied,and a "fairness-based resource allocation method" is designed,and then,through simulation analysis,it is concluded that the "fairness-based resource allocation method" can maximize After that,we conclude that the "fairness-based resource allocation method" can maximize the number of normal communication users in the system and improve the resource utilization to a certain extent.