COMBINING 2 RADAR TECHNIQUES TO IMPLEMENT A COLLISION-AVOIDANCE SYSTEM

Many microwave collision avoidance radars have been tested using FMCW (frequency modulated continuous wave) radar and pulsed radar working a round 10, 35 and 60 GHz. The aim of this paper is to describe an effic ient radar system, termed bimodal, obtained by the combination of thes e two systems. The FMCW sensor is used for close detection and easier speed calculation, and the pulsed one for large distances and multi-ta rget separation. The bimodal system has been used to improve the perfo rmances of the two sensors by retaining the advantages of each. The ne w radar is able to detect obstacles between 2 and 150 m with low emitt ed power. The whole system is controlled by a decision program unit. A n accuracy of +/-1 m has been achieved.