Y. L. Sit, Gang Li, Sarath Manchala, H. Afrasiabi, C. Sturm, U. Lubbert
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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.
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