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:
Jan. 28, 2014
Filed:
Jan. 23, 2012
Matthew Nimon, Hinckley, OH (US);
Fan MO, Hinckley, OH (US);
William Thesling, Hudson, OH (US);
Sameep Dave, Hinckley, OH (US);
Matthew Nimon, Hinckley, OH (US);
Fan Mo, Hinckley, OH (US);
William Thesling, Hudson, OH (US);
Sameep Dave, Hinckley, OH (US);
ViaSat, Inc., Carlsbad, CA (US);
Abstract
Methods, systems, and devices are described for compensating for a coarse frequency offset between a received optical signal and a local oscillator at a demodulator. Multiple samples are received of an output of a discrete Fourier transform performed on the received optical signal. A magnitude of each sample is determined, and the determined magnitudes may be filtered by a digital domain filter. A difference is computed between the determined magnitudes for a first set of the samples and the determined magnitudes for a second set of the samples, and a local oscillator correction factor is generated based on at least the computed difference.