This example demonstrates using the AI Engine FFT block in Vitis Model Composer and comparing the results to the Simulink FFT block.
💡 Note the usage of the environment varibale in MATLAB to more easily set the paths in the AIE Graph block mask.
💡 Note the usage of the To Fixed Size block to convert a variable size signal to a fixed size signal. This is needed to compare the output of the AIE block to the output of the FFT block from Simulink (which is a fixed size signal). Note this is only valid if the variable size signal is fully packed. Otherwise, the To fixed size block will insert zeros when samples are missing. To make sure this is not the case, you can check the status output of the To fixed Size block.
DSPlib AI Engine FFT and Simulink FFT comparison for a complex sinusoidal input:
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