Design and implementation of near-field, wideband synthetic aperture beamformers

Author

Ahmad, Fauzia ; Frazer, Gordon J. ; Kassam, Saleem A. ; Amin, Moeness G.

Author_Institution

Villanova Univ., PA, USA

Volume

40

Issue

1

fYear

2004

fDate

1/1/2004 12:00:00 AM

Firstpage

206

Lastpage

220

Abstract

A coarray-based near-field, wideband synthetic aperture beamformer using stepped-frequency signal synthesis and post-data acquisition processing is presented. While coarray techniques offer significant reduction in the number of array elements for a given angular resolution, the hybrid subarray-stepped frequency realization of wideband systems simplifies implementations and offers flexibility in beamforming. Proof of concept is provided using real data collected in an anechoic chamber for several pulse shapes and array weightings.

Keywords

array signal processing; radar imaging; radar signal processing; signal synthesis; synthetic aperture radar; anechoic chamber; angular resolution; array element reduction; array weighting; coarray-based beamformer; hybrid subarray-stepped frequency method; near-field synthetic aperture beamformers; post-data acquisition processing; pulse shape; stepped-frequency signal synthesis; wideband synthetic aperture beamformers; Apertures; Array signal processing; Australia; Image sensors; Microwave imaging; Sensor arrays; Signal resolution; Transmitters; Ultrasonic imaging; Wideband;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.2004.1292154

Filename

1292154