23 lines
997 B
Python
23 lines
997 B
Python
"""Frequency-domain functions"""
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def fft(r, c=None):
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"""
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:param ulab.array r: A 1-dimension array of values whose size is a power of 2
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:param ulab.array c: An optional 1-dimension array of values whose size is a power of 2, giving the complex part of the value
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:return tuple (r, c): The real and complex parts of the FFT
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Perform a Fast Fourier Transform from the time domain into the frequency domain
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See also ~ulab.extras.spectrum, which computes the magnitude of the fft,
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rather than separately returning its real and imaginary parts."""
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...
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def ifft(r, c=None):
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"""
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:param ulab.array r: A 1-dimension array of values whose size is a power of 2
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:param ulab.array c: An optional 1-dimension array of values whose size is a power of 2, giving the complex part of the value
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:return tuple (r, c): The real and complex parts of the inverse FFT
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Perform an Inverse Fast Fourier Transform from the frequeny domain into the time domain"""
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...
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