FFT-Based Algorithm for Metering Applications

FFT-Based Algorithm for Metering Applications
Freescale Semiconductor Document Number: AN4255
Rev. 0, 11/2011
Application Note




FFT-Based Algorithm for
Metering Applications
by: Luděk losarík
Ronov Czech System Center
Czech Republic




Contents
The Fast Fourier Transform (FFT) is a mathematical 1 DFT basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
technique for transforming a time-domain digital signal 2 FFT implementation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
into a frequency-domain representation