Abstract
This work proposes the use of a modulated tag for direct communication between two vehicles using as a carrier the wave emitted by an FMCW radar installed in the vehicle for advanced driver assistance. The system allows for real-time signals detection and classification, such as stop signal, turn signals and emergency lights, adding redundancy to computer video sensors and without incorporating additional communication systems. A proof-of-concept tag has been designed at the microwave frequency of 24 GHz, consisting of an amplifier connected between receiving and transmitting antennas. The modulation is performed by switching the power supply of the amplifier. The tag is installed on the rear of the car and it answers when it is illuminated by the radar by modulating the backscattered field. The information is encoded in the modulation switching rate used. Simulated and experimental results are given showing the feasibility of the proposed solution.
Highlights
Nowadays, collisions in urban environments are too frequent [1]
This paper introduces an approach to vehicle-to-vehicle communication taking advantage of automotive radar
The radar uses a patch antenna array design that achieves a field of view (FOV) of approximately 120 degrees in azimuth and 15 degrees in elevation
Summary
Collisions in urban environments are too frequent [1]. The high density of vehicles, bad weather conditions, driver’s age, fatigue or distractions are some of the reasons for the high number of collisions in cities [2]. Radar is a key sensor for advanced driver assistance systems (ADAS). Automotive radar is a mature technology which, due to advances in millimeter wave (mmWave) technology, is available even for mid-range cars [3]. Future generations of autonomous vehicles will need sensors to recognize the environment in real-time. Radar technology is not affected by poor weather or light conditions [4,5] in comparison with other technologies such as camera-based sensors or LIDAR. The automotive radar market is growing and will continue, driven by safety and autonomous driving
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