Picture of a black hole

Strathclyde Open Access research that creates ripples...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of research papers by University of Strathclyde researchers, including by Strathclyde physicists involved in observing gravitational waves and black hole mergers as part of the Laser Interferometer Gravitational-Wave Observatory (LIGO) - but also other internationally significant research from the Department of Physics. Discover why Strathclyde's physics research is making ripples...

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Overlap-save frequency invariant generalised sidelobe canceller

Koh, C.L. and Weiss, S. (2005) Overlap-save frequency invariant generalised sidelobe canceller. In: 8th International Symposium on Signal Processing and Its Applications, 2005-08-28 - 2005-08-31.

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

In this paper, we propose a frequency invariant adaptive broadband beamformer based on an overlap-save frequency domain implementation of the generalised sidelobe canceller (GSC). Broadband signals drawn from a nested array are decomposed into frequency bins which are grouped into octaves. Subsequently, frequency dependent weighting assigned to individual frequency bins restricts the variation in spatial resolution usually associated with broadband arrays of fixed aperture. A GSC beamformer is incorporated to achieve adaptive nulling of interferers, but requires modifications to the constraint equation of the standard GSC in order to account for the frequency-dependent weighting of sensors. Simulation results highlighting the benefits of the proposed approach are presented.