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:
Sep. 08, 2009
Filed:
Dec. 13, 2005
Jochen Pliquett, Munich, DE;
Thomas Reichert, Munich, DE;
Jochen Pliquett, Munich, DE;
Thomas Reichert, Munich, DE;
Rohde & Schwarz GmbH & Co. KG, Munich, DE;
Abstract
A method and a device for carrier-frequency synchronization of a vestigial-sideband-modulated received signal (r(t)) with a carrier signal (e), which is affected by a frequency offset and/or phase offset (Δf, Δφ), estimates the frequency offset and/or phase offset (Δf, Δφ) of the carrier signal (e) by means of a maximum-likelihood estimation. For this purpose, the vestigial-sideband-modulated received signal (r(t)) is converted into a modified vestigial-sideband-modulated received signal (x'(t′)), which provides time-discrete complex rotating phasors (|x′(t′)|·e), in which only the time-discrete phases (2πΔft′+Δφ) are dependent upon the frequency offset and/or phase offset (Δf, Δφ).