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:
Aug. 29, 2000
Filed:
Nov. 26, 1997
Carl H Alelyunas, Nevada City, CA (US);
Andrew L Norrell, Nevada City, CA (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
Decision-based timing information extraction from a baud-rate sampled digital transmission system. Samples are interpolated from a data sample stream to obtain samples shifted forward and backward in time. A timing metric is applied to the forward and backward shifted sample stream to create forward and backward timing metric values. A timing recovery metric is applied to the forward and backward timing metric values, and is used as a phase feedback term to recover timing information. The method and system yield a very fast, data-driven convergence for baud-rate timing, and does not rely on any specific data sequence. The method and system are used in digital communication devices such as digital modems.