Institute of Electrical & Electronic Engineers
In this paper, transmit and receive Collaborative Beamforming (CB) techniques are considered to achieve a dual-hop communication from a source to a receiver, through a Wireless Sensor Network (WSN). Whereas the previous works assumed a model of plane wavefronts, here, a local scattering in the source or receiver vicinity is considered, thereby broadening the range of applications in real-world environments. Taking into account the local scattering, these beamformers aim to maintain the beamforming response in the desired direction equal to unity. It is shown that the so-obtained beamformers are not suitable for a distributed implementation in WSNs.