- Sep 10, 2005
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CSFT = Continuous Surface Fourier Transform
2D FFT = Discrete Windowed Version
If the magnitude plot of a sine and cosine both occupy the 1st and 3rd quadrants, what do peaks in the 2nd and 4th quadrant represent? Usually I think of fourier transforms as a sum of sines and cosines, but clearly something is missing when I don't know what happens in the 2nd and 4th quadrants. Seems like all fourier signals can occupy the 1st and 3rd.
2D FFT = Discrete Windowed Version
If the magnitude plot of a sine and cosine both occupy the 1st and 3rd quadrants, what do peaks in the 2nd and 4th quadrant represent? Usually I think of fourier transforms as a sum of sines and cosines, but clearly something is missing when I don't know what happens in the 2nd and 4th quadrants. Seems like all fourier signals can occupy the 1st and 3rd.
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