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:
Feb. 25, 1992
Filed:
Apr. 12, 1990
Applicant:
Inventors:
Richard L Udd, Santa Barbara, CA (US);
James C Robertson, Santa Barbara, CA (US);
Assignee:
Raytheon Company, Lexington, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375 10 ; 455 65 ; 455115 ; 342 44 ;
Abstract
A method and apparatus for associating received pulses with one of a plurality of emitters emitting pulses at periodic intervals. Periodic pulse trains are detected by computing the difference in arrival times between each received pulse and a fixed number of previously received pulses. In the simplest embodiment, a periodic pulse train is detected when one of the computed differences is one-half of another computed difference. In other embodiments, further processing is performed to detect staggered pulse trains or other periodic patterns.