Enhancing polarization diversity in RIS-aided Integrated Communication and Sensing Networks

European Radar Conference (EuRAD), pp. 307–310

Abstract

Reconfigurable Intelligent Surfaces (RIS) and Integrated Sensing and Communication (ISAC) enhance network performance by optimizing both sensing and communication. This paper investigates a polarization-modulating RIS to improve sensing diversity and target classification in a distributed Multiple Input Multiple Output (MIMO) ISAC system. The RIS acts as a virtual transmitter, converting a 1×2 distributed Single Input Multiple Output (SIMO) system into a 2×2 distributed MIMO ISAC system, enhancing spatial diversity, detection probability, Doppler robustness, and resolution while reducing noise. Additionally, polarization diversity enables full polarimetric processing, improving target classification. Simulations show that the RIS-aided system improves radar resolution by 40%, reduces noise by 88.6%, and increases detection probability. These findings highlight the potential of polarization-diverse RIS for ISAC applications in vehicular networks and autonomous driving.

Authors 4

1. Abdelrahman Elgamal Aachen Chair of Radar System Engineering

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Chair of Radar System Engineering,Germany

2. Wasim Alshrafi

   Fraunhofer Institute for High Frequency Physics and Radar Techniques

   Affiliation as printed

   Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR,Germany

3. Thomas Dallmann

   Technische Universität Ilmenau

   Affiliation as printed

   Technische Universität Ilmenau,FAVF Research Group,Germany

4. Peter Knott Aachen Chair of Radar System Engineering

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Chair of Radar System Engineering,Germany