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Complex FFT Model

This I/O model, cfft.m, performs a Fast Fourier transform (FFT) on the incoming complex signal.

% NEXSYS Functional_Model ("cfft", "1","c", "length", "1","c", "length", "NO_DATA_REQ", "NOT_APPLICABLE", "length" )

Here are the inputs and outputs for this model:

“cfft”	Model name and function name
“1”	One input
“c”	Input type is complex
“length”	“length” samples needed per invocation
“1”	One output
“c”	Output is complex
“length”	“length” samples generated per invocation
“NO_DATA_REQ”	No extra data reference is required
“NOT_APPLICABLE”	No probe domain
"length"	Parameter for the model

Here is the cfft function definition.

function[output, SV] = cfft(input, parameters, SV, status_in)

The input and output variables for the function are:

input	Input signal
parameters	Parameter values of the model
SV	State variable (in)
status_in	Input status
output	Output signal
SV	State variable (out)

Get Parameters:

length = parameters(1);

Calculate output and return:

output = fft(input(1:length));

return


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