Simultaneously Power and Information Transmission for Half-duplex Massive MIMO with Spatial Basis Expansion Model

In this paper, we consider the beam-domain time-switching (TS) simultaneous wireless information and power transfer (SWIPT) protocol design in half-duplex (HD) massive multiple-input multiple-output (MIMO) system, where the sensors are uniformly distributed in its coverage area. In order to reduce the computational complexity, we propose spatial basis expansion model (SBEM) with rotation angle to improve the performance of SWIPT technology. In the proposed scheme, the transmit time interval is decomposed to three subintervals, the duration of each subinterval is optimized to maximize the system spectrum efficiency.