Optimal Swipt Transceiver Design For Multi Cell MIMO System

With the development of 4G wireless telecommunication,the wireless system is becoming more and more intelligent,which leads to the popular research on web of things(WOT).However,as the user terminal(UT)of the WOT become more and more popular among people’s life,the energy constraint of the UT’s battery comes to be one of the main problems that delays the development of the WOT for its continuous energy demand.Thus the design for low power UT is one of the key point for further improvement of WOT.However,a new technology called simultaneous wireless information and power transfer(SWIPT),which draws much attention recently,is a promising technology for the problem.This technology combines wireless power transfer and wireless information transfer,transmits the two kinds of signals within the same spectrum simultaneously.In SWIPT,the UT receives the information and power simultaneously,preserving the advantages of MIMO communication without losing the communication QoS.This technology has the potential to solve the energy problem mentioned before and has a promising future.Based on MIMO multi cell system,this paper studies the SWIPT transceiver design in two different circumstances while the transceivers of the base stations(BSs)and UTs are all equipped with multiple antennas,fulfills SWIPT in different conditions,proposes the optimization problem while meeting the SWIPT requirements,and then solves the problem through convex optimization.The computer simulation shows the results of the optimization.The main work in this paper includes:1.This paper proposes an SWIPT design for down link in multi cell environment.This scheme focuses on the link between the BS and the UTs,considers both the intra-cell interference and the inter-cell interference,and designs the minimum mean square error(MMSE)SWIPT transceiver for the system.The point of the scheme lies on the combination of SWIPT and MIMO in multi cell environment,making the UTs satisfy the charging constraint while the BS satisfying the power constraint,meanwhile minimizing the MSE of the system,seeking the balance of communication quality and charging bound.2.This paper proposes an SWIPT design for double link in multi cell environment,considers the complete link for communication between the two nodes in one cell:the up link from the source UT to the BS and the down link from BS to the destination UT.This scheme takes both weighted MSE and the sum rate into consideration,optimizes the SWIPT transceiver in the multi cell environment.The key point of the scheme is the balance between the weighted MSE,sum rate and SWIPT.3.This paper implement the two SWIPT transceiver design by computer simulation.Through simulating the three algorithm proposed for different schemes,Lagrange relaxing,SDR and SCA,this paper compares the MSE or sum rate performance of the three transceiver designs for each algorithm and then concludes the three algorithm for their feasible situations.