Digital Beamforming for Simultaneous Power and Information Transmission in Wireless Systems

Abstract

Abstract—This paper proposes a Beamforming algorithm for simultaneous transmission of information and power in multiantenna linear array system. Here we considered three node system in which transmitter and receiver are largely separated from each other whereas energy harvesting circuit is colocated with the information receiver i.e. encounters the same channel from the transmitter. Our primary motto is to maximize the energy harvested by the harvester circuit, at the same time maintaining the information rate above a certain threshold level. Firstly, we used an algorithm to steer the antenna beam in a desired direction. Secondly, we combined this algorithm with another algorithm that maximizes the harvested energy. The hybrid algorithm produces an improvement in the result in terms of received signal level and side-lobe level. Finally, simulation results are presented to justify the effectiveness of the proposed algorithm. and Information) can be either separate or co-located. Here we consider the scenario in which the energy and information receivers are separated i.e. the signal from the transmitter to the energy and information receivers suffer from different channel path gains. We study transmission strategy to achieve maximum energy transfer, at the same time maintaining the information rate above a threshold level. The scenario in which the receivers are co-located can be solved similarly as the above, considering same channel path gains. However, the practical circuit limitations make this scenario of colocated receivers infeasible