FFT TUTOR: A MATLAB-BASED INSTRUCTIONAL TOOL FOR FFT PARAMETER EXPLORATION

摘要

Although the Fast Fourier Transform (FFT) has been the staple of signal processing [Oppenheim(1998)] for many years, it is still frequently misapplied. In many cases, the confusion stems from misconceptions regarding the relations between time and frequency-domain parameters. Also, spectral leakage due to mismatches between the sample rate and the harmonic contents, and the choice of windowing technique, are a frequent cause of trouble.