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2019-01-07

Novel Directional Adaptive Relaxation Parameters for MUSIC-Like Algorithm

By Narong Borijindargoon and Boon Ng
Progress In Electromagnetics Research Letters, Vol. 81, 21-28, 2019
doi:10.2528/PIERL18112002

Abstract

An algorithm called MUSIC-like algorithm was originally proposed as an alternative method to the MUltiple SIgnal Classi cation (MUSIC) algorithm in order to circumvent requirement on subspace segregation. The relaxation parameter β, which was introduced into the formulation of the MUSIC-like algorithm, has enabled the algorithm to achieve high resolution performance comparable to the MUSIC algorithm without requiring explicit estimation of the signal and noise subspaces. An adaptive framework for the MUSIC-like algorithm was later developed under the α-stable distributed noise environment. In spite of great improvement on target's resolvability performance, a trade-off between such improvement and the estimation bias is inherent. In this letter, two novel directional adaptive β-selection methods for MUSIC-like algorithm under α-stable distributed noise are proposed. The proposed methods aim at reducing estimation bias and noise sensitivity which are inherent in prior adaptive β framework. Simulation results highlight noticeable reduction on the estimation bias as well as the noise sensitivity of the proposed methods without excessive compromise on target's resolvability performance compared with the original adaptive β framework.

Citation


Narong Borijindargoon and Boon Ng, "Novel Directional Adaptive Relaxation Parameters for MUSIC-Like Algorithm," Progress In Electromagnetics Research Letters, Vol. 81, 21-28, 2019.
doi:10.2528/PIERL18112002
http://www.jpier.org/PIERL/pier.php?paper=18112002

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