Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-09-04
2007-09-04
West, Jeffrey R. (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S075000, C342S196000
Reexamination Certificate
active
11270096
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 fs, and the DFT module is configured to analyze the received sampled digital signal at a frequency bandwidth that is equal to or less than fs. The frequency bandwidth is equal to the sampling frequency of fs, 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.
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Lopata Stuart Mitchell
Tsui James B. Y.
Ward Charles Richard
ITT Manufacturing Enterprises Inc.
RatnerPrestia
Sievers Lisa
West Jeffrey R.
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