Deployment of RIS in MIMO OFDM Dual-Function Radar-Communication System

Dual-function radar-communication (DFRC) system is considered one of the most promising technologies in wireless communication systems. By using orthogonal frequency division multiplexing (OFDM), the system can sense several spatial directions while serving multiple users concurrently. Multi-input multi-output (MIMO) DFRC with the aid of a reconfigurable intelligent surface (RIS) is examined in this paper. Using genetic algorithms, this paper optimizes the mutual information (MI) performance metric for the targets while ensuring a minimum error rate for the users. For the scenarios considered in this paper, it is shown that the proper RIS deployment can improve the system performance by 20%.