双向中继带直连无线携能MIMO系统接收机优化算法研究

o prolong the lifetime of wireless networks, simultaneous wireless information and power transfer (SWIPT) has become a prospective solution which can alleviate the energy deficiency problem. In this paper, an amplify-and-forward (AF) MIMO two-way relay (TWR) system with a direct link (DL) and energy harvesting (EH) is studied. A power splitting (PS) receiver is considered at the relay node. Our objective is to jointly solve a source-relay transmit beamforming optimization problem to minimize the mean-square-error (MSE) of the system, which considers transmitting power constraints at source and relay. For the purpose of addressing this nonconvex problem, an algorithm based on generalized singular value decomposition (GSVD) technique and geometric programming (GP) is proposed, which can avoid decomposing the coupled transmit beamformers and get closer to the global solution. The effectiveness of the proposed schemes is proved through simulation results.