simulink implementation of the fft algorithm

[always84]

Hi,

I´m working in a Simulink digital loop (discrete step simulation) and every clock period I need to process the digital output data in order to implement the fft algorithm over the time record vector. I´ve some problems with my user defined simulink functions because i can´t build a block which has a scalar input (every output of my digital loop) and outputs a vector (collect a time record of inputs) and also a block which has an input vector (the time record) and gives an output vector. This problems are maybe due to the fact that my simulation is discrete.

Someone has solved this kind of problem or maybe has some idea to approach this problem?

thank you

 

[iamluqi]

This is like a multi-rate discrete sim. User defined function (eg. s-func) may not easy to achieve this. U may consider using some implicit multi-rate conversion blocks already built in simulink(eg. p2s/s2p blocks).