Robust minimum dispersion distortionless response beamforming against fast-moving interferences

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

13 Scopus Citations
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Detail(s)

Original languageEnglish
Pages (from-to)190-197
Journal / PublicationSignal Processing
Volume140
Online published12 May 2017
Publication statusPublished - Nov 2017

Abstract

The recently proposed minimum dispersion distortionless response (MDDR) beamformer is able to improve the reception of non-Gaussian signals over the minimum variance distortionless response (MVDR) beamformer. However, the performance of the MDDR beamformer degrades in the presence of fast-moving interferences. To suppress such an interference, a robust beamformer against fast-moving interferences based on the minimum dispersion (MD) criterion is proposed, which provides a continuous deep null sector over a predefined range of dynamic angle-of-arrival (AOA). The designed beamformer ensures that the output is minimized in terms of dispersion and the average power over the dynamic AOA is zero via a quadratic constraint. In order to reduce the computational load, the optimization problem with a quadratic constraint is relaxed to its counterpart with a linear constraint. This allows us to devise an efficient beamforming approach, namely, gradient projection algorithm. Numerical results are provided to demonstrate that the developed beamformer can suppress the strong fast-moving interferences effectively.

Research Area(s)

  • Beamforming, Fast-moving interferences, Interference suppression, Minimum dispersion, Sub-Gaussian signals

Citation Format(s)

Robust minimum dispersion distortionless response beamforming against fast-moving interferences. / Zhang, Liang; Li, Bo; Huang, Lei; Kirubarajan, Thiagalingam; So, Hing Cheung.

In: Signal Processing, Vol. 140, 11.2017, p. 190-197.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review