Improving the performance of Root-MUSIC via pseudo-noise resampling and conventional beamformer

Abstract

A new pseudo-noise resampling technique is proposed to mitigate the effect of outliers in Root-MUSIC. After resampling of Root-MUSIC via pseudo-randomly generated noise we combine it with conventional beamformer (as a result we obtain the resampled modified root-MUSIC). Censored selection of the results of pseudo-randomly resampled modified Root-MUSIC algorithms is exploited based on an appropriate local performance test.

Doa Estimation Based on Proximity of the Roots of Several Polynomials of Superresolution Methods

“…The performance degradation of the subspacebased methods can be explained by appearance of outliers in the parameter estimates in the practically important situations with small sample, signal-to-noise ratios and so on [1,2,[4][5][6][7][8][9][10].…”

“…Performance of the parameter estimation by subspace-based methods can be improved by application of the group of the subspace-based methods with different characteristics (so called joint estimation strategy), subspace-based method with second-order and higher-order CM, resampling approaches (bootstrap, pseudo noise resampling, surrogate data technology), singular spectrum analysis (SSA) [4,[6][7][8][9][10]. The different levels of implementation of the concept of the outlier removing are known [6][7][8][9][10]. The process of elimination can be realized on the level of estimators (i.e.…”

“…The analysis of the previous investigations and publications. The problem of the outlier reduction in DOA estimation was mentioned in the several works [1,[7][8][9][10]. In the general case the source angular sectors were used.…”

“…In the general case the source angular sectors were used. This approach was used in the case of estimator bank formed using pseudorandom weighting of eigenvectors, pseudonoise resampling [7][8][9][10]. It can be used in the case of traditional methods related with spatial spectrum (MUSIC, Min-Norm) and with parallel search methods (Root-MUSIC, ESPRIT).…”

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

“…In this paper, which is based on the results of [8], a generalization of pseudo-noise approach [3] when applying it to Root-MUSIC is presented. We combine the two approaches for removing the outliers-the pseudo-noise approach and approach of [1].…”