Work

Robust RIS-Assisted MIMO Communication-Radar Coexistence: Joint Beamforming and Waveform Design

Year: 2023

Type: article

Abstract: This paper addresses the problem of co-existence between a radar and a communication system that share the same frequency band. In particular, we investigate the role of a reconfigurable intelligent surface (RIS) in improving the performance of both systems and facilitating their co-existence. We consider the optimization problem of maximizing the radar signal to interference plus noise ratio (SINR) with respect to the active transmit beamformer at the radar, the passive RIS reflection coefficients, and the transmit covariance matrices of the communication system, subject to communication outage as well as radar and communication power constraints. This problem is solved through an alternating maximization procedure, first in the ideal scenario of perfect channel state information (CSI), and then in the case of incomplete CSI, using a statistical model of the CSI uncertainty. Numerical results demonstrate the effectiveness of our approach and quantify the beneficial effect of an RIS on the co-existence of a radar and a communication system.

Source: IEEE Transactions on Communications

DOI: 10.1109/tcomm.2023.3298983

Authors: Mohamed Rihan, Alessio Zappone, Stefano Buzzi

Institutions: Università degli studi di Cassino e del Lazio Meridionale, Menoufia University, Politecnico di Milano

Language: English

Topic: Advanced Wireless Communication Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,345

Funders: European Commission, Horizon 2020 Framework Programme, H2020 Marie Skłodowska-Curie Actions