Joint 4D Radar and Communication System Enabled by Virtual Transceiver Matrix Architecture for Advanced Automotive Sensing and Connectivity

In this paper, a joint 4D radar and communication (RadCom) front-end is proposed, developed, and experimentally demonstrated for next-generation automotive sensing and connectivity systems capable of simultaneously sensing azimuth, elevation, range, and velocity. The system leverages the reconfigurable and dynamic properties of Virtual Transceiver Matrix (VTM) to achieve advanced sensing capabilities. Additionally, it integrates real-time inter-vehicle communication to enhance situational awareness. The 4D sensor cells are realized using an interferometric technology, marking the first application of interferometry in 4D radar sensing. A prototype operating in the 24 GHz band is developed to validate the proposed concept. Experimental results from system-level measurements are set to demonstrate the system's potential for automotive applications, showcasing its effectiveness and versatility.