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:
Nov. 27, 1990
Filed:
Jan. 16, 1990
Leslie M Jenson, Vadnais Heights, MN (US);
TSI Incorporated, St. Paul, MN (US);
Abstract
A method and apparatus for automatically detecting a coherent frequency burst is disclosed. The apparatus 10 determines the approximate frequency and duration of the burst. The apparatus 10 operates utilizing principles of autocorrelation to reject random noise and maximize the efficiency of a down stream data signal processor. The apparatus 10 includes delay means 30 which accepts a digitized signal from a device, such as a photodetector in an LDV, and generates a plurality of delayed signals. The delayed signals are then multiplied by the original signals by multiplier means 40. The multiplied signals are provided to averaging circuits 50. The averaged signals are then compared to a reference level by comparators 60, the output of which is provided to priority encoder 70. Priority encoder 70 prioritizes the signals received from comparators 60 and determines the length of the burst.