Beamspace ESPRIT for multi-source arrival angle estimation employing tapered windows

Document Type

Conference Presentation

Department

Electrical and Computer Engineering

Conference Title

ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings

Date of Presentation

1-1-2002

Abstract

This paper presents two new algorithms that operate in beamspace and provide closed-form arrival angle estimates in conjunction with uniform linear arrays. The algorithms window the array data using either a cosine shaped window or a Hanning window prior to beamforming. The resulting array patterns have low sidelobe levels (peak sidelobe level ≈ -23.5dB for cosine window, peak sidelobe level ≈ -32.3dB for Hanning window) and provide enhanced out-of-band source suppression. In contrast, the existing DFT Beamspace ESPRIT algorithm employs a rectangular window; the resulting array pattern has a peak sidelobe level of ≈ -13.5dB. The new algorithms clearly provide better out-of-band source suppression than DFT Beamspace ESPRIT. They can provide arrival angle estimates of sources in a given spatial sector without being swamped by powerful sources lying outside the sector of interest.

ISSN

1520-6149

Volume

3

First Page

3009

Last Page

3012

DOI

10.1109/ICASSP.2002.5745282

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