The performance analysis for distributed collaborative beamforming transmission of clustered mobile sensor network

Sensor nodes cannot directly communicate with the distant unmanned aerial vehicle (UAV) for their low transmission power. Distributed collaborative beamforming from sensor nodes within a cluster is proposed to provide high speed data transmission to the distant UAV. The bit error ratio (BER) closed-form expression of distributed collaborative beamforming transmission with mobile sensor nodes has been derived. Furthermore, based on the theoretical BER analysis and the numerical results, we have analyzed the impacts of nodes' mobility, number of sensor nodes, transmission power and the elevation angle of UAV on the BER performance of collaborative beamforming. And we come to the following conclusions: the mobility of sensor nodes largely decreases the BER performance; when the position deviation radius is large, incensement in power cannot improve BER anymore; the size of cluster should be bigger than 10 for the purpose of achieving good BER performance in Rayleigh fading channel.