Millimeter-wave radar is widely used in autonomous driving. A MIMO antenna array and corresponding motion compensation method are designed to solve the Doppler-angle coupling problem of time-division multiplexing multipleinput multiple-output (TDM-MIMO) frequency-modulated continuous wave (FMCW) radar. First, overlapping-elements are introduced into the traditional MIMO antenna array, and the phase difference between the overlapping-elements is used to eliminate the motion-induced phase errors. Then, the phase error caused by the position error of the antenna element is corrected by an iterative method. Finally, the FFT algorithm is used to accurately estimate the moving target's distance, velocity, and angle. Simulation experiments show that the method can effectively solve the Doppler-angle coupling problem, improve the angle estimation accuracy of moving targets and avoid the multi-target matching problem.

Date Published: 1 August 2022
PDF: 9 pages
Proc. SPIE 12257, 4th International Conference on Information Science, Electrical, and Automation Engineering (ISEAE 2022), 122572J (1 August 2022); doi: 10.1117/12.2640231

Published in SPIE Proceedings Vol. 12257:
4th International Conference on Information Science, Electrical, and Automation Engineering (ISEAE 2022)
Lidan Wang; Mengyi (Milly) Cen, Editor(s)