Filter-and-forward multiple peer-to-peer beamforming in relay networkswith frequency selective channels

Distributed beamforming is a powerful approach to reliable communications in relay networks. In this paper, a novel multiple peer-to-peer beamforming technique is proposed for relay networks with multiple source-destination pairs and frequency selective source-to-relay and relay-to-destination channels. Our technique uses a filter-and-forward relaying strategy to compensate for channel frequency selectivity and mitigate inter-symbol interference. Simulation results clearly demonstrate that the proposed technique substantially outperforms the existing amplify-and-forward multiple peer-to-peer beamforming techniques in frequency selective fading environments.