A Real Time Signal Processing for an Anticollision Road Radar System

This paper describes the real time processing unit used for an anticollision road radar system. This radar based on a numerical correlation between the transmitted signal and the received signal is under development. The signal uses orthogonal codes to ensure a multiple access communication between all vehicles in near area. In this paper, a real time processing unit associated to an original anticollision radar is presented. The studied radar is based on spreading spectrum coded radar waveforms at 76-77 GHz and a numerical correlation receiver. This sensor associated to other sensors like Lidar and Camera will be used on-board vehicles for more safety on road. The studied receiver computes the numerical crosscorrelation between the received signal and a replica of the transmitted code to allow an optimal detection. The appropriate coding and processing have been used to implement a laboratory radar mock-up. The real time processing is tested in order to show their performances and disadvantages when applied to obstacles detection. The main idea is to achieve an efficient real time detection using a simple and low cost system.