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:
Oct. 31, 2006
Filed:
Nov. 27, 2001
Leroy Andrew Gibson, Jr., Riverton, UT (US);
Dan M. Griffin, Bountiful, UT (US);
Lyman D. Horne, Salt Lake City, UT (US);
Randal R. Sylvester, West Valley City, UT (US);
Leroy Andrew Gibson, Jr., Riverton, UT (US);
Dan M. Griffin, Bountiful, UT (US);
Lyman D. Horne, Salt Lake City, UT (US);
Randal R. Sylvester, West Valley City, UT (US);
L-3 Communications Corporation, New York, NY (US);
Abstract
A method and device for frame sync detection using signal combining and correlation. The method comprises the steps of despreading PN coded signals to provide in-phase I–I, and quadrature phase Q–Qsignals, wherein each I–Iand each Q–Qsignal contains at least one sync bit and n≧2. The at least one sync bit from each I–I, and quadrature phase Q–Qsignals are summed to form sums Iand Q, respectively. The next step provides a reference sync having at least one bit and compares each sum Iand Qwith the at least one reference bit. The results of each Iand Qcomparison are accumulated so as to form two accumulates, Iand Q, respectively. Each accumulate Iand Q, is squared to form Iand Qfrom which the sum Iand Qis formed. The sum I+Qis compared with a predetermined threshold and as a result of the comparison a determination of whether frame sync has been achieved is made.