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:
May. 06, 2003
Filed:
May. 25, 1999
Timothy P. Froehling, Palatine, IL (US);
Louis J. Vannatta, Crystal Lake, IL (US);
Scott L. Chamberlain, Algonquin, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method ( ) of enabling automatic frequency control (AFC) concurrent with time alignment of information in a communication device includes a first step ( ) of providing a data stream to an AFC. A second step ( ) includes applying multiple frequency offsets to the data stream. The offsets are separated from each other by about ±2&pgr;/2 radians with m being the number of bits per symbol in the modulation system. A third step ( ) includes correlating each frequency offset signal with a predetermined symbol sequence until correlation is found. A fourth step ( ) includes coupling the correct data stream of the branch with the found correlation to an AFC logic circuit indicating AFC lock. A fifth step ( ) includes simultaneously supplying the correct data stream to the communication device along with the fourth step ( ) such that time alignment can take place concurrently with AFC in the communication device.