A coarray-based aperture synthesis scheme using subarrays and postdata acquisition beamforming is presented for through-the-wall wideband microwave imaging applications. The wall causes wave refraction and a change in the propagation speed, both effects alter the travel time between the transmitter, the target, and the receiver. Coherent combining of the pulse waveforms emitted by the different transmitters and incident at the receivers through reflections from targets and clutter requires incorporation of wall effects into the beamformer design. Simulation results verifying the proposed synthetic aperture technique for a through-the-wall imaging (TWI) system are presented. The impact of the wall ambiguities or incorrect estimates of the wall parameters, such as thickness and dielectric constant, on performance is considered.
Synthetic aperture beamformer for imaging through a dielectric wall
IEEE Transactions on Aerospace and Electronic Systems ; 41 , 1 ; 271-283
2005-01-01
1143462 byte
Article (Journal)
Electronic Resource
English
Synthetic Aperture Beamformer for Imaging Through a Dielectric Wall
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