WIDE BAND DELAY LINE

• US 3,618,098 A
• Filed: 12/24/1963
• Issued: 11/02/1971
• Est. Priority Date: 12/24/1963
• Status: Expired due to Term

• Current Assignee: Hilary H. Nall
• Original Assignee: Hilary H. Nall
• Inventors: Nall, Hilary H.
• Primary Examiner(s): Bennett, Jr., Rodney D.
• Assistant Examiner(s): Berger, Richard E.
• Application Number:
  US04/333,230
• Time in Patent Office: 2,870 Days
• Field of Search: 343/100.7,15 235/181
• US Class Current: 342/378
• CPC Class Codes: G01S 13/325 using transmission of coded signals, e.g. P.S.K. signals
• CPC Class Codes: G01S 13/46 Indirect determination of position data
• CPC Class Codes: G06G 7/1928 for forming correlation integrals; for forming convolution integrals G06G7/195, G06G7/1907 and G06G7/1914 take precedence

Abstract

A triangulation-correlation system having an improved correlator using a wide range variable delay line and a multiplier capable of multiplying the wise band signals together.

Claims

1. A correlator for a passive target locating system, comprising, a first receiver for receiving a first group of reflected radio signals from said target, a second receiver for receiving a second delayed target, of radio signals from said target. a limiter operably connected to receive as input the signals received by said first receiver storage means, means for gating the output of the limiter at timed intervals into said storage means, said means releasing the output from said storage means after a predetermined delay, and means for providing output signals indicative of coincidence between output signals from said storage means and output signals from said second receiver.

2. A correlator as recited in claim 1, wherein said storage means includes a flip-flop.

3. In a correlator for a passive target locating system, a delay apparatus including a receiver, a video detector connected with the receiver, a gate connected to the video detector, a pulse generator connected to the gate, said pulse generator controlling said gate, a second gate, a boxcar connected between the first and second gates, and a delay generator connected to the pulse generator and between the gates, said delay generator delaying in time an output pulse from the second gate.

4. In a passive target locating system including a master station, a target station, and a repeater station, a correlator including a receiver for picking up a signal from the target station, a detector connected to the receiver, a limiter connected to the detector, a gate connected to the limiter for sampling the signal from the limiter, signal storage means connected with the gate, said storage means having parallel outputs, a gate connected to each of said outputs, means for receiving a signal from the repeater station, said repeater station comprising a transponder, means at the master station for amplifying the signal from the transponder, detecting means connected to said last-mentioned means, differentiating means connected to said detecting means, gating means connected to the differentiating means, said gating means being connected to said storage means output gates, summing means connected to the outputs of said gating means and the storage means output gates, and integrating means connected to said summing means.

5. A passive target locating system as recited in claim 4, wherein said signal storage means consists of a flip-flop.

6. A passive target locating system as recited in claim 4, wherein said signal storage means consists of a flip-flop, and including a delay generator and a timing generator connected to the first mentioned gate.

7. A correlator for a passive target locating system, including a first receiver for receiving a first group of radio signals from said target, a second receiver for receiving a second delayed group of radio signals from said target, detector means connected to said first receiver for detecting output signals therefrom, storage means having an input adapted to be operably connected to said detector means to receive said detected signals from said first receiver;

gating means operably connected between the input of said storage means and said detector means for gating input signals into said storage Means from said detector means at timed intervals, and connected to the output of said storage means for releasing output signals therefrom after a predetermined delay, and means for providing output signals indicative of coincidence between output signals from said storage means and output signals from said second receiver.

8. The invention as recited in claim 7, wherein said storage means comprises a boxcar.