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Description
Definitions
- The Nyquist rate is twice the maximum component frequency of the function being sampled.
- Sample Rates - Number of Samples per Second (Hz)
- Dt = Interval for Digital sample
Dt = 1/Hz
- Period T = BlockSize * Dt
- Frequency Domain Resolution Dt = Sample Rate / FFT Block Size (N)
example
N=8192
Sample Rate = 1000Hz
Df = 1000/ 8192 = .122Hz (on FFT/DFT plot)
T = 1/Df = 8.192sec
T = N*Hz = 8.192sec
Note that for a real input signal (imaginary parts all zero) the second half of the FFT (bins from N / 2 + 1 to N - 1) contain no useful additional information (they have complex conjugate symmetry with the first N / 2 - 1 bins). The last useful bin (for practical aplications) is at N / 2 - 1,
Inputs
InVector
WindowVector
Parameters
Type
BlockSize
Size over whcih to to the Fourier Transform
OverLap
Averaging
RealVector
ImgVector
MagVector
CalTheta
PhaseVector
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