MISO information and power transfer with finite-rate feedback under fading channel

Abstract

Mobile devices or sensor nodes are usually energy-constrained, and in some scenarios it is inconvenient or impractical to charge or replace batteries. To tackle this problem, the idea of transferring power to mobile devices wirelessly via radio frequency signals has recently gained much attention. In this paper, we consider a point-to-point communication system in which the transferred power is used for the receiver to feedback the quantized channel state information (CSI) to the transmitter, and then the transmitter utilizes the CSI to beamform the signals. Two power and information transfer architectures are considered: time-switching and power splitting. We derive bounds of the average achievable rates under the fading channel.