Doppler measurement of lateral and longitudinal velocity for automobiles at millimeter waves

A Doppler radar system which is able to measure the lateral and the longitudinal speed of an automobile is presented. Knowledge of the lateral speed gives a better understanding of the vehicle´s dynamic behavior, especially in critical situations. The theoretical measurement accuracy is evaluated and compared to experimental data. The accuracy depends on the antenna configuration and on its beamforming properties. Data recorded during test runs in a real environment are in good agreement with the theoretical expected values.<>