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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Vector >
Vector Fast Fourier Transform (VFFT)

Vector Fast Fourier Transform (VFFT)

Property	Description	Units	Default	Range/Type
Fftl	Fourier transform length	None	1024	[1, Inf)/integer
RIN	Input impedance	Ohm	Inf	(0, Inf]/Real
ROUT	Output impedance	Ohm	0	[0, Inf)/Real
Ports
Input	Input signal (complex vector)
Output	Output signal (complex vector)

Notes

This model performs FFT on the incoming vector signal. If the width of the input vector signal is smaller than “fftl”, zeros are padded. If “fftl” is not a power of 2, it will be modified to the next power of 2.

Netlist Form

VFFT:NAME n1 n2 fftl=val [Rin=val] [Rout=val]

Netlist Example

VFFT:1 1 2 fftl = 256

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