Abstract
Automated driving has become increasingly viable through the deployment of a number of sensing technologies on vehicles. These intelligent transportation systems (ITS) employ sensors such as radar, camera and lidars for collision avoidance and vehicle-to-everything (V2X) communication links for active environment sensing. Since the available spectrum for vehicular systems is limited, spectrum sharing in ITS sensors is a subject of active investigation. This paper presents a spectrum sharing technology that enables interference-free operation of an automotive radar and a V2X communication system within a common spectrum. Both systems dynamically share information with each other and optimize their spectral resources to the changing RF environment. The V2X system is a cognitive radio that is capable of blind sensing its spectrum using very low sampling and processing rates. The radar system is also modeled as a cognitive system that employs a Xampling-based sub-Nyquist receiver and transmits in several narrow bands that occupy a fraction of the conventional radar bandwidth. We present a hardware realization of this vehicular spectrum sharing technology and demonstrate spectral coexistence through real-time experiments.
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