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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8878945 B1

PDFFull Text
Date of Patent:
Nov. 04, 2014

Filed:

Nov. 22, 2013

Phasor-based pulse detection

Applicant:

Lockheed Martin Corporation, Bethesda, MD (US);

Inventor:

James A. Johnson, Owego, NY (US);

Assignee:

Lockheed Martin Corporation, Bethesda, MD (US);

Attorneys:

Miles & Stockbridge P.C.

James T. Carmichael

Primary Examiner:

Victor Kostak

Int. Cl.
CPC ...
H04N 17/02 (2006.01); H04L 27/01 (2006.01); H04B 1/10 (2006.01); H04L 27/26 (2006.01); G01S 7/285 (2006.01); H04B 1/16 (2006.01); G06F 7/52 (2006.01);
U.S. Cl.
CPC ...
H04B 1/16 (2013.01); G01S 7/285 (2013.01); G06F 7/52 (2013.01);
Abstract

A phasor-based pulse detection system includes a first multiplier stage configured to apply a first delayed conjugate multiplication operation to an input signal. The system can also include a second multiplier stage coupled to the first multiplier stage and configured to apply a second delayed conjugate multiplication operation to an output of the first multiplier stage, and an absolute value unit coupled to the second multiplier stage and configured to perform an absolute value operation on an output of the second multiplier stage. The system can further include video filter stage coupled to the absolute value unit and configured to perform a video filtering operation on an output of the absolute value unit. The system can also include a hysteresis detector coupled to the video filter stage, the hysteresis detector configured for detecting a signal in a filtered video signal received from the video filter stage, the detecting including determining a signal start when the filtered video signal exceeds a predetermined detection threshold for a first predetermined number of consecutive samples, and determining a signal end when the filtered video signal falls below a predetermined rejection threshold for a second predetermined number of consecutive samples.

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