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:
Apr. 28, 2009
Filed:
Aug. 10, 2004
Johnny M. Harris, Centerville, UT (US);
Samuel C. Kingston, Salt Lake City, UT (US);
Thomas R. Giallorenzi, Riverton, UT (US);
Dan M. Griffin, Bountiful, UT (US);
David W. Thorson, Salt Lake City, UT (US);
Richard B. Ertel, Midvale, UT (US);
Johnny M. Harris, Centerville, UT (US);
Samuel C. Kingston, Salt Lake City, UT (US);
Thomas R. Giallorenzi, Riverton, UT (US);
Dan M. Griffin, Bountiful, UT (US);
David W. Thorson, Salt Lake City, UT (US);
Richard B. Ertel, Midvale, UT (US);
L-3 Communications Corporation, New York, NY (US);
Abstract
A composite code is made for example by exclusive-OR'ing each real element of a first constituent code A with each element of a second constituent code B to obtain a basic composite code. To suppress autocorrelation, differing numbers of doping code elements are inserted between code segments made from combining each element of code A with an element of code B. A matched filter first stage removes from its input the A code and any doping code added to it, summing the elements of code A. A matched filter second stage removes from its input the B code and any doping code added at the second level. The summed elements of code B are the input to the first stage. Optionally, the summed elements of the doping code at any level may be delayed and summed with the elements of the A code in the first stage.