Platform motion compensation of a coherent mti system

• US 3,341,847 A
• Filed: 05/24/1966
• Issued: 09/12/1967
• Est. Priority Date: 05/24/1966
• Status: Expired due to Term

• Current Assignee: Ted G. Sprague, Walter R. Fried
• Original Assignee: Ted G. Sprague, Walter R. Fried
• Inventors: Fried, Walter R., Sprague, Ted G.
• Application Number:
  US04/552,556
• Time in Patent Office: 476 Days
• US Class Current: 342/88
• CPC Class Codes: G01S 13/5242 with means for platform motion or scan motion compensation, e.g. airborne MTI
• CPC Class Codes: G01S 13/528 with elimination of blind speeds
• CPC Class Codes: G01S 13/64 Velocity measuring systems using range gates

Claims

1. IN A DIRECTIONALLY-RANGING PULSED ENERGY SYSTEM, CLOSED LOOP MEANS FOR IMPROVING THE INDICATED DISTINCTION BETWEEN A CLUTTER BACKGROUND AND A DETECTED TARGET MOVING RADIALLY OF SAID SYSTEM RELATIVE TO SAID CLUTTER BACKGROUND AND COMPRISING SIGNAL INTEGRATING MEANS RESPONSIVE TO THE CENTROID OF THE SPECTRA OF A SENSED CLUTTER BACKGROUND AND TO A PULSE REPETITION FREQUENCY OF THE PULSED ENERGY SYSTEM FOR PROVIDING AN OUTPUT SIGNAL INDICATIVE OF THE TIME INTEGRAL OF THE FREQUENCY DIFFERENCE THEREBETWEEN;

AND VOLTAGE-CONTROLLED PERIODIC SIGNALLING MEANS RESPONSIVELY COUPLED TO AN OUTPUT OF SAID SIGNAL INTEGRATING MEANS FOR VARYING SAID PULSE REPETITION INTERVAL OF SAID PULSED ENERGY SYSTEM.