z-Transform
The discrete 
-transform is defined as
 | (1) |
-transform with  | (2) |
-transform with  | (3) |
is called a Fractional Fourier Transform.See also Discrete Fourier Transform, Fractional Fourier Transform
References
Arndt, J. ``The -Transform (ZT).'' Ch. 3 in ``Remarks on FFT Algorithms.'' http://www.jjj.de/fxt/.
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