Field directionality synthesis from multiple array orientations: A least squares approach

Combining multiple beamforming outputs from different orientations of a linear array to obtain a full 2-D field directionality is investigated in this paper. A wavefield sampling method is proposed that could be effective at eliminating left-right ambiguity, reducing resolution problems at endfire directions, and suppressing background noise. Simulation results suggest that this wavefield sampling method could improve the probability of detection of weak directional sources. The method is compared with previous methods and is shown to have resolution and computation advantages.