Wireless energy harvesting networks with multiple filter-and-forward relays

Abstract

This letter proposes a filter-and-forward relay scheme with multiple relay nodes using wireless energy harvesting. A relay node processes the received signal by using a time-domain filter to suppress inter-symbol interference and forwards its outputs using the energy harvested from the received signals that arrive from the source node and from all the relay nodes. We consider the filter design method based on the signal-to-interference-plus-noise power ratio maximization problem under multiple constraints for relay transmit power. Simulation results show the effectiveness of the proposed scheme owing to the cooperation of multiple relay nodes.