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:
Jul. 15, 2003
Filed:
Jul. 28, 1999
Weizhong Chen, Keller, TX (US);
Leo George Dehner, Southlake, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A receiver ( ) receives ( ) a first signal including a sync portion ( ) having a carrier acquisition segment ( ) and a timing synchronization pattern ( ), and a processing system ( ) of the receiver calculates ( ) a first plurality of squared magnitude Fourier transforms at a first plurality of frequencies on the carrier acquisition segment. The processing system derives ( ) an initial carrier frequency error estimate by locating a peak in the first plurality of squared magnitude Fourier transforms, and corrects ( ) the sync portion according to the initial carrier frequency error estimate, thereby producing a carrier-corrected sync portion. The processing system then removes ( ) the timing synchronization pattern from the carrier-corrected sync portion, thereby producing a second signal having a residual carrier error.