Is there a fixed-point alternative to the fft and ifft fiunction?

I wish to convert a series of functions from floating-point to fixed-point using the fixed-point converter app in MATLAB. Within the functions are a few fft and ifft functions. These are not compatible with fixed-point types or fi.objects and need to be replaced. Is there a fft function that allows fixed-point types?

If there is not an alternative/replacement. What is the best method to cinduct fft's on fixed-point?

Answer 1

[Andy Bartlett]

The FFT provided by DSP System Toolbox as MATLAB callable system object dsp.FFT or as the FFT block support fixed-point data types in MATLAB and in Simulnk.