A Beamforming Algorithm for MIMO SWIPT Systems

Abstract

Efficient usage of energy resources is a growing concern in today’s communication systems. Energy harvesting is a new paradigm and allows the nodes to recharge their batteries from the environment. In this paper, we focus on the design of optimal linear beamformer for multi- input multi-output (MIMO) simultaneous wireless information and power transfer (SWIPT) system. We formulate the problem of maximizing the information rate while keeping the energy harvested at the energy receivers above given levels. Finally, simulation results demonstrate the efficiency of the proposed algorithm.

Keywords

• simultaneous wireless information and power transfer (SWIPT)
• beamforming
• MIMO (multi- input multi-output)
• minimum mean square error (MMSE)
• optimization