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. 04, 2015
Filed:
Apr. 23, 2010
Vasanth Gaddam, Tarrytown, NY (US);
Vasanth Gaddam, Tarrytown, NY (US);
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
A method and system is provided for detecting the presence of a DVB (digital video broadcasting) transmission with frequency offsets. The method includes receiving an RF (radio frequency) signal in a selected channel; creating samples from the received RF signal; estimating a frequency offset of the samples; correcting the samples with the estimated frequency offset; correlating the corrected samples with a reference signal; and comparing a correlation result with a threshold value. The frequency offset estimation includes selecting a set of three or more pilots that are boosted continual pilots transmitted at fixed sub-carrier locations in all symbols; transforming the received samples to the frequency domain; determining locations of maxima in the transformed samples, the maxima corresponding to the pilots in the set; and comparing the determined locations with the expected pilot locations in the set.