RADAR VIDEO PROCESSOR

Apparatus for processing radar video signals and applying the processed signals to a radar display. The apparatus includes video extraction circuitry which removes random pulse interference and noise from the video signals. The improvement of the present invention comprises clutter transmission circuitry and a memory which transmits and stores clutter video signals provided by the video extraction circuitry. In addition, comparison circuitry is provided which compares the applied signals (present video) provided by the video extraction circuitry to time-averaged signals computed thereby. The comparison circuitry transmits the present video signals to the radar display when the difference between the present video signals and the time-averaged signals is greater than a predetermined value. In one specific embodiment, the comparison circuitry includes scan-to-scan correlation circuitry which provides time-averaged video signals which are averaged in a predetermined manner over a plurality of azimuth scans. The comparison circuitry also includes a comparator which compares the signals provided by the video extraction circuitry (present video) and the time-averaged signals and transmits the present video signals when the difference between the present video and time-averaged signals is greater than a predetermined value.