BPSK-based MIMO FMCW Automotive-Radar Concept for 3D Position Measurement

A novel concept of employing BPSK codes to achieve a simultaneous transmission in a 79 GHz FMCW automotive radar is presented in this paper. With a MIMO topology, simultaneous azimuth and elevation measurements become possible by utilizing the angle-dependent phase difference between the antenna arrays. Hence, this approach can offer a 4D detection of range, azimuth, elevation and Doppler-velocity for each detected target. This concept has been verified through test drives in multiple scenarios and the measurements showed that the elevation accuracy is only limited by calibration.