kaleem ahmad wrote:

3- Can you suggest some different way to solve this problem, The problem is
simply to calculate the cycle time of some system which is already working
in the environment


Since your unknown FSK signal has a regular cycle time, it should be
relatively easy to detect.  For example, if your signal has a 1 ms
cycle time, the low frequency spectrum should exhibit a large spike
at 1 KHz.  It seems that all you would need is an fft that covers
the range of frequencies that correspond to your possible cycle
times.

@(^.^)@  Ed




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