Digital video correlator

Claim 1

IN A RADAR RECEIVER THE IMPROVEMENT COMPRISING: TIMING MEANS DEFINING A NUMBER N OF CONSECUTIVE AND SEQUENTIAL INTERVALS FOR EACH PERIOD OF OPERATION OF THE RECEIVER; A MEMORY MEANS HAVING AT LEAST N POSITIONS; INPUT MEANS ACTUATED BY THE TIMING MEANS, SAID INPUT MEANS SERVING TO RENDER RECEPTIVE TO THE PRESENCE OF AN INPUT SIGNAL A SEPARATE ONE OF THE STORAGE MEANS POSITIONS FOR EACH OF THE N INTERVALS WHEREBY FOR EACH INTERVAL IN SEQUENCE THERE IS RECORDED IN A CORRESPONDING POSITION OF THE STORAGE MEANS THE PRESENCE OR ABSENCE OF AN INPUT SIGNAL OCCURRING DURING THAT INTERVAL; OUTPUT MEANS ACTUATED BY THE TIMING MEANS IN SYNCHRONIZATION WITH SAID INPUT MEANS, SAID OUTPUT MEANS RECEIVING THE INPUT SIGNAL AND FUNCTIONING TO PERMIT PASSAGE TO THE RECEIVER OUTPUT OF ANY INPUT SIGNAL OCCURRING DURING AN INTERVAL OF A PERIOD ONLY IF THE PRESENCE OF AN INPUT SIGNAL FOR THE CORRESPONDING INTERVAL OF THE LAST PRECEDING PERIOD IS SHOWN BY A SIGNAL FROM THE APPROPRIAWTE POSITION OF THE STORAGE MEANS.