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.:
Date of Patent:
Dec. 18, 1984
Filed:
Jul. 15, 1982
Clarence L Bennett, Jr, Groton, MA (US);
Robert D Short, III, Littleton, MA (US);
Sperry Corporation, New York, NY (US);
Abstract
A signal processor for detecting the presence of two signals whose over-all phase or frequency is related by a known rational number. The first signal of frequency .omega.M is raised to the N.sup.th power, while the second signal of frequency .omega.N is raised to the M.sup.th power. The two raised signals are then correlated, energy detected, and compared against a predetermined threshold to provide an indication when both signals are present. By utilizing the known frequency relationship between the two signals the processor yields enhanced detection performance over that achievable by detection of each signal separately.