Patent ID: 6023236
Filing Date: 2000-02-08
Classification: G01S

Abstract:
In a traffic radar, apparatus for determining patrol vehicle speed from Doppler return information comprising:means for receiving Doppler return information containing at least one return signal derived from a stationary target, and for presenting said information as digital data,means for transforming said data into the frequency domain to provide a spectrum that includes frequency components corresponding to Doppler return signals contained in said information,a memory for storing said components,means for receiving speed information corresponding to the patrol vehicle speedometer speed,means responsive to said speed information for providing a search window around said patrol vehicle speedometer speed, said window having a lower boundary less than said patrol vehicle speedometer speed and an upper boundary greater than said patrol vehicle speedometer speed,means for searching said components stored in said memory within said window to identify the patrol vehicle component, andmeans responsive to said identified component for indicating the speed of said patrol vehicle corresponding thereto.