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:
May. 08, 2018
Filed:
Mar. 07, 2017
Mstar Semiconductor, Inc., Hsinchu Hsien, TW;
Kuan-Chou Lee, Zhubei, TW;
Tai-Lai Tung, Zhubei, TW;
MStar Semiconductor, Inc., Hsinchu Hsien, TW;
Abstract
An apparatus for estimating carrier frequency offset includes a notch frequency setting circuit, N notch filters, an Mpower circuit, a spectrum generating circuit, a peak frequency determining circuit, a comparing circuit, and a frequency offset determining circuit. The notch frequency setting circuit sets different notch-frequencies for the notch filters, which generate N filtered signals by filtering an input signal. The Mpower circuit performs an Mpower calculation on the N filtered signals to generate N Mpower filtered signals. The spectrum generating circuit generates N Morder spectra for the N Mpower filtered signals. The peak frequency determining circuit determines respective peak frequencies of the N Morder spectra. The comparing circuit identifies an optimal peak frequency from the N peak frequencies. The frequency offset determining circuit determines an estimated carrier frequency offset according to the optimal peak frequency.