How can I determine the frequency of a signal in Simulink?

I would like to use a built-in Simulink block to determine the frequency of a signal.

Answer 1

[MathWorks Support Team]

A built-in block that determines the frequency of a signal is not available in the Simulink product.

To work around this issue, you can write a C-MEX S-function that implements a fast Fourier transform (FFT) algorithm. For more information, see "Writing S-Functions" in the Simulink documentation.

Otherwise, use one of the following built-in options provided by the Signal Processing or DSP toolbox products:

• Use the Spectrum Scope block to compute the frequency of a signal.
• Use the FFT and Buffer blocks to create a signal frame and analyze its frequency.

Answer 2

[AbhimanyuSingh]

There is no such block which can directly calculate the frequency of block, but we can design a subsystem which can give you the frequency of signal. Please find the snapshot for the same:

[Jan]

@Jean Ubertalli: Please do not use flags for posting comments.

[Jan]

@SUMANT ANAND: It is hard so solve "similar" problems. Please open a new thread and explain your specific problem.