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. 18, 2016
Filed:
Dec. 29, 2014
Hughes Network Systems, Llc, Germantown, MD (US);
Jack Lundstedt, Monrovia, MD (US);
John Schmid, Darnestown, MD (US);
Guy Montgomery, Potomac, MD (US);
Bahman Salamat, Bethesda, MD (US);
George Eapen, Boyds, MD (US);
Yeqing Tang, North Potomac, MD (US);
Brian Smith, Mount Airy, MD (US);
Hughes Network Systems, LLC, Germantown, MD (US);
Abstract
A mobile terminal for satellite communications receives communication, e.g., from a gateway via a satellite link. A frequency lock loop unit locks to the carrier frequency of the received communication. The mobile terminal includes a global positioning system for receiving global positioning data. The mobile terminal determines the Doppler frequency shift of the received communications based on the global positioning data. The mobile terminal generates a reference clock for return transmissions based on the frequency of the frequency lock loop, corrected for the Doppler shift. A correction factor of two times the determined Doppler frequency shift is used, to compensate for both a forward and return transmission link.