Robust adaptive beamforming: Experimental results

The performances of adaptive array algorithms are known to degrade in scenarios with moving interfering sources. Recently, several robust approaches have been proposed to overcome this problem. Below, we compare conventional and robust algorithms using shallow sea sonar data with moving co-channel interference originated from shipping noise. This data set was recorded by a towed horizontal Uniform Linear Array (ULA) of 15 hydrophones. Our real data processing results demonstrate drastic performance improvements that can be achieved using robust algorithms relative to conventional adaptive beamforming techniques.