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. 12, 2005
Filed:
Mar. 28, 2001
Gregory Agami, Arlington Heights, IL (US);
Robert John Corke, Glen Ellyn, IL (US);
Ron Rotstein, Arlington Heights, IL (US);
Daniel G. Prysby, Elk Grove Village, IL (US);
Gregory Agami, Arlington Heights, IL (US);
Robert John Corke, Glen Ellyn, IL (US);
Ron Rotstein, Arlington Heights, IL (US);
Daniel G. Prysby, Elk Grove Village, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A receiving communication device synchronizes to a timing reference of a transmitting communication device based on a determined timing error. The receiving communication device determines the timing error by processing a synchronization signal via a first stage filtering and interpolation process that includes predetermined coefficients and a second stage interpolation process that includes a minimal number of dynamically determined coefficients. By dividing the process into a predetermined coefficient stage and a dynamically determined coefficient stage, the receiving communication device is able to make timing adjustments in a more efficient manner, that is, at a lesser processor loading, than a communication device in which all filtering and interpolation coefficients are dynamically determined. In addition, by including a second order timing recovery loop, the receiving communication device is able to quickly and precisely respond to drifting of a timing reference differential between itself and the transmitting communication device.