Radar Target Detection aided by Reconfigurable Intelligent Surfaces

TL;DR

This paper investigates how reconfigurable intelligent surfaces can enhance radar target detection by providing additional echoes, with theoretical analysis showing significant potential gains in detection performance.

Contribution

It introduces a novel radar detection architecture utilizing RIS, with theoretical analysis demonstrating the potential for substantial detection improvements.

Findings

Large detection gains achievable with RIS-assisted radar

Theoretical analysis for various radar and RIS configurations

Potential for improved sensing performance in radar systems

Abstract

In this work, we consider the target detection problem in a sensing architecture where the radar is aided by a reconfigurable intelligent surface (RIS), that can be modeled as an array of sub-wavelength small reflective elements capable of imposing a tunable phase shift to the impinging waves and, ultimately, of providing the radar with an additional echo of the target. A theoretical analysis is carried out for closely- and widely-spaced (with respect to the target) radar and RIS and for different beampattern configurations, and some examples are provided to show that large gains can be achieved by the considered detection architecture.