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:
Oct. 08, 1996
Filed:
Aug. 13, 1993
Michael I Parr, San Diego, CA (US);
John L Watson, Carlsbad, CA (US);
T G Vishwanath, San Diego, CA (US);
Hughes Electronics, Los Angeles, CA (US);
Abstract
The present invention provides for carrier offset tracking which is particularly well suited for use in a receiver for digital cellular mobile telephones. The tracking includes storing samples received in time slots, generating estimates of the transmission channel impulse response, recording two samples of each tap of each channel impulse response estimate, generating frequency offset estimates from the phase difference in each time slot between the samples, combining this plurality of frequency offset estimates to generate a precise frequency offset estimate, and adjusting a controllable frequency source to compensate for the precise frequency offset estimate. Time-reversed operation further enhances performance and permits implementation with reasonable complexity for a standards compliant mobile receiver.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile