Experimental Phase-Encoded Linear Sampling Method Imaging With a Single Transmitter and Receiver

Abstract

The phase-encoded linear sampling method (PE-LSM) is an inverse scattering technique for reconstructing the shape of a conducting target from scattered electric fields. It is a variant of the well-known linear sampling method (LSM), which solves the nonlinear shape reconstruction problem using linear optimization. The PE-LSM mitigates the primary obstacle to practical imaging via LSM-based processing – its need for copious multistatic-multiview transmit-receive channels. In this study, we evaluate the PE-LSM using experimental data. We collect synthetic aperture data in an anechoic chamber using only a single transmit-receive channel. With the aid of a monostatic-to-multistatic transform, we generate reconstructions of each target via the PE-LSM. The results evince significant improvements in fidelity to the true target geometries compared to imagery generated by both conventional LSM processing and a conventional backprojection-based radar approach.

Keywords

• Imaging
• inverse scattering
• beamforming