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:
Mar. 13, 2001
Filed:
Nov. 12, 1998
Applicant:
Inventors:
Mohamed G. El-Tarhuni, Nepean, CA;
Anatoli V. Kotov, Ottawa, CA;
Assignee:
Nortel Networks Limited, , CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/707 ;
U.S. Cl.
CPC ...
H04B 1/707 ;
Abstract
In a spread-spectrum radio communication system in which transmissions occur with varying amounts of delay and in which the delay of a received signal must be determined in order to despread the signal, a system for refining the initial estimate of delay and for tracking the delay during an ongoing communication by correlating the signal at the estimated delay, an increment earlier than the estimated delay, and the same increment later than the estimated delay, and interpolating the early and late correlations normalized by the correlation at the estimated delay and by the increment to determine a refined estimate of the delay.