Removing the outliers in root-MUSIC via pseudo-noise resampling and conventional beamformer

•We combine the resampled Root-MUSIC with a conventional beamformer.•The proposed approach mitigates the effect of outliers in Root-MUSIC estimator.•Performance tends to improve when increasing the number of resampling runs.

A joint use of pseudo-noise resampling technique and a conventional beamformer is proposed to mitigate the effect of outliers in Root-MUSIC estimator. After resampling of Root-MUSIC via pseudo-randomly generated noise we combine it with a conventional beamformer (in the sense that identification of the signal roots is based on the power of the conventional beamformer response). The resulting estimator can be referred to as modified resampled Root-MUSIC. The estimator bank is formed from a number of modified resampled Root-MUSIC. Censored selection of the results of modified pseudo-randomly resampled Root-MUSIC estimators is exploited based on an appropriate local performance test.