Stepped-frequency DORT Imaging with Singular Value Decomposition for a Single-antenna Ultrawideband Radar in Multi-path Environments

TL;DR

This paper introduces a stepped-frequency DORT imaging algorithm that enables high-resolution radar imaging using a single antenna in multi-path environments, reducing system complexity and cost.

Contribution

It extends the conventional DORT method to operate with a single antenna by utilizing a frequency-frequency matrix for improved imaging in ultrawideband radar systems.

Findings

Successful numerical simulation verification

Effective multi-path scattering utilization

Single-antenna imaging capability demonstrated

Abstract

Ultrawideband radar is an attractive technology for a variety of applications including security systems. As such, it is essential to develop low-cost systems that produce clear target images. Electromagnetic inverse scattering with time-reversal imaging has been studied for a variety of applications. The time-reversal method, however, uses large-scale antenna arrays, making the system potentially more costly. In this study, we propose an ultrawideband radar imaging algorithm, namely the stepped-frequency DORT algorithm, that uses multi-path scattering for a single antenna. The proposed imaging method is an extension of the conventional DORT method, and uses a frequency-frequency matrix that is suitable for a system with a single antenna. The performance of the proposed method is verified through numerical simulations.