Adaptive time-slot and power allocation in MIMO systems for simultaneous wireless two-way information and one-way energy transfer

RF energy harvesting based on wireless energy transfer (WET) can release mobile terminals from battery constraint and has drawn significant research interest. In this paper, in order to solve the problem of Simultaneous Wireless Two-Way Information and One-Way Energy Transfer (TWI & OWE-SWT) in MIMO systems, an Adaptive Time-slot and Power Allocation Scheme (A-TPAS) is proposed. And to maximize the effectiveness of channel utilization, we define the Effective Throughput (ET) as a metric to evaluate the system performance rather than the traditional sum throughput. Subsequently, the A-TPAS is optimized through Improved Stochastic Ranking Evolution Strategy (ISRES) and the optimal allocation is obtained. Finally, the numerical simulation results verify that our scheme can suppress inter-cell interferences and maximize the sum of ET and it performs better than existing one.