Am radar with noise correlation

• US 3,195,130 A
• Filed: 02/23/1961
• Issued: 07/13/1965
• Est. Priority Date: 02/23/1961
• Status: Expired due to Term

• Current Assignee: Donald J. Adrian
• Original Assignee: Donald J. Adrian
• Inventors: Adrian, Donald J.
• Application Number:
  US04/091,286
• Time in Patent Office: 1,601 Days
• US Class Current: 342/145
• CPC Class Codes: G01S 13/32 using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
• CPC Class Codes: G01S 13/536 using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves

Claims

1. IN A RADAR SYSTEM THE COMBINATION COMPRISING:

NOISE MODULATED TRANSMITTER MEANS FOR GENERATING AND TRANSMITTING A RADIO FREQUENCY NOISE SIGNAL;

RECEIVER MEANS INCLUDING A FIRST MIXER CIRCUIT FOR RECOVERING SAID NOISE SIGNAL WHICH INCLUDES A DOPPLER FREQUENCY BAND, AMPLIFIER MEANS COUPLED TO SAID RECEIVER MEANS FOR AMPLIFYING ONLY THE DOPPLER FREQUENCY PORTION OF SAID RECEIVED SIGNAL, BALANCED DETECTOR MEANS COUPLED TO SAID DOPPLER AMPLIFIER MEANS AND TO SAID RECEIVING MEANS FOR DETECTING A COMBINED SIGNAL CONSISTING OF SAID AMPLIFIED DOPPLER SIGNAL AND SAID RECEIVED SIGNAL, SECOND MIXER MEANS FOR MIXING SAID DETECTED SIGNAL WITH A NOISE SIGNAL FROM SAID TRANSMITTER MEANS FOR GENERATING OUTPUT PULSES WHICH REPRESENT THE TARGET FROM WHICH SAID TRANSMITTED SIGNAL HAS BEEN REFLECTED.