An Approach to Snr Improvement in Distributed Beamforming of Randomly Distributed Sensors an Approach to Snr Improvement in Distributed Beam Forming of Randomly Distributed Sensors

The simultaneous transmission of data by more than one transmitter leads to interference in the destination. Though this can be overcome by introducing cooperative communication, still the SNR performance is poor. In this paper, Dual Beam Array (DBA) is considered to reduce interference in the place of two single beam arrays. The Dual Beam Array has the advantage of narrow beam width as it can be formed out of 2N sensors; each N sensors belonging to single beam array. In addition utilizing standard array geometries such as ULA, UCA and UEA better beam pattern is obtained. However, formation of standard arrays from randomly distributed sensors results in phase error. This is mitigated by estimating the array weight using LS Estimation. The simulation results of average beam pattern and SNR under large path loss channel model with Additive White Gaussian Noise (AWGN) show that the performance of Dual Beam Array is better than Two Single Beam Arrays transmitting simultaneously.