| 摘要 |
<p>A method for measuring the ground speed (V) of a vehicle (1) by means of the Doppler frequency shift between a transmitted wave (3) from a radar (2) on board the vehicle and a reflected wave (4) from the ground. The radar used enables simultaneous measurement of the distance (D) and speed (V) of the vehicle relative to the ground, and the distance measurement is used to validate the speed measurement.</p> |
