Robust Microphone Beamformer in the Presence of Multiple Interfering Signals

This paper presents a robust uniform linear microphone array (ULMA) beamforming to focus on specific sound among multiple interferences along with other reverberations using constrained techniques in Matlab Simulink platform. Robust beamforming is essential for practical implementation because of different uncertainties created in beamformer such as direction-of-arrival (DOA) mismatch which degrades the array performance most. Preparation of controlled beamforming usually requires presteering the array using direction finding hindrances which generate execution problem and hence the degradation in array performances. Simulation results have demonstrated that the proposed acoustic microphone array processor gives almost 3.5% better performances in terms of SINR and array gain of the beamformer and eliminating the requirement of array presteering criteria as it has the capability to steer the main beam at any random direction.