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FFT4.zip
This program produces a Frequency Domain display from the Time Domain data input using the Fast Fourier Transform.
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FFT of waveIn audio signals.zip
The Fast Fourier Transform (FFT) allows users to view the spectrum content of an audio signal. The FFT code presented here was written by Don Cross though his homepage appears to have subsequently been taken down. Rather than explain the mathematical ...
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方便的小波变换原代码.rar
... 变换源代码
wav_basic.c: basic filtering, decimation and upsampling routines.
wav_basic.h: interface to wav_basic.c.
wav_trf.c: transform routines.
wav_trf.h: interface to wav_trf.c.
wav_filters.h: where filter banks and their properties are defined.
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AGuideToTheFFT.zip
GENERAL DESCRIPTION
％ In the following, temporal signals will be characterized by
％ lower letters and the Fourier Transform with capilats letters:
％ x(t) === FT ===> X(f).
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