A wideband, synthetic aperture beamformer for through-the-wall imaging

Author

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

Author_Institution

Center for Adv. Commun., Villanova Univ., PA, USA

fYear

2003

fDate

14-17 Oct. 2003

Firstpage

187

Lastpage

192

Abstract

A coarray-based aperture synthesis scheme using subarrays and post-data acquisition beamforming is presented for through-the-wall wideband microwave imaging applications. Various effects of the presence of the wall, such as refraction, change in speed, and attenuation, are incorporated into the beamformer design. Simulation results verifying the proposed synthetic aperture technique for a TWI system are presented. The effects of incorrect estimates of the parameters of the wall, such as thickness and dielectric constant, on performance are investigated.

Keywords

array signal processing; electromagnetic wave refraction; image processing; microwave imaging; permittivity; attenuation; coarray-based aperture synthesis scheme; microwave imaging; postdata acquisition beamforming; refraction; subarrays; synthetic aperture beamformer; through-the-wall imaging; wall dielectric constant; wall thickness; wideband beamformer; Apertures; Array signal processing; Dielectric constant; Microwave imaging; Microwave propagation; Parameter estimation; Spatial resolution; Transmitters; Ultrasonic imaging; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Phased Array Systems and Technology, 2003. IEEE International Symposium on

Print_ISBN

0-7803-7827-X

Type

conf

DOI

10.1109/PAST.2003.1256979

Filename

1256979