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. 04, 2007
Filed:
Nov. 09, 2005
James B. Y. Tsui, Dayton, OH (US);
Charles Richard Ward, Wellsboro, PA (US);
Stuart Mitchell Lopata, Palisades Park, NJ (US);
James B. Y. Tsui, Dayton, OH (US);
Charles Richard Ward, Wellsboro, PA (US);
Stuart Mitchell Lopata, Palisades Park, NJ (US);
ITT Manufacturing Enterprises, Inc., Wilmington, DE (US);
Abstract
An apparatus for confirming a frequency measurement of a received signal includes a discrete Fourier transform (DFT) module for receiving a sampled digital signal. The DFT module is configured to analyze the received sampled digital signal, and output amplitude values at different frequency components. A threshold comparator is included for receiving the amplitude values of the frequency components and outputting a thresholded-amplitude value exceeding a predetermined threshold value. A frequency confirmation is provided based on the thresholded-amplitude value. The sampled digital signal is sampled at a sampling frequency of f, and the DFT module is configured to analyze the received sampled digital signal at a frequency bandwidth that is equal to or less than f. The frequency bandwidth is equal to the sampling frequency of f, when the received sampled digital signal includes I and Q signals. The DFT module is configured to analyze the received sampled digital signal by examining N frequency components, where N equals the total number of frequency components equally spaced between 0 and the sampling frequency.