Reposition of 4D Imaging radar in sensor-fusion system toward Autonomous Driving

Millimeter radar has be incorporated into sensor fusion-based ADAS system for many years. However, due to antenna form-factor and cost consideration, legacy radar could only provide sparse detection results relatively to high resolution camera or lidar, so made a late fusion system hard to associate its outputs with the other sensors semantically. 4D image radar has shown great potential of being either a standalone or a complementary sensor in level-x autonomous driving system, while contributing its unique measurement—velocity to enhance the accuracy of perception under a dynamic traffic environment.