Go green with distributed beamforming

Utilizing distributed beamforming in relay-assisted communications to transmit information from a source to a destination has the potential to improve the performance of wireless system on several aspects for green wireless. Relevant improvements are signal-to-noise power ratio (SNR) enhancement and reduction of power consumption. In this work, we use a distributed beamforming in a non-regenerative relay system to reduce the total power consumption. We successfully derive the optimal weights at the relay stations and the receiver using matrix/vector notation, which allow received signals to be coherently added at the receiver hence maximizing the output SNR. We also investigate and show the performance of a distributed beamforming non-regenerative relay system with multi-antenna receiver in terms of power consumption by computer simulations.