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Data extraction, coding data processing in C using FFT and wavelet

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Our Signal: Combination of two frequencies- measuring signal and interference signal (noise)
Measuring signal: 10-400Hz variable in steps of 1Hz and is independent of line
Interference signal: Line frequency (50Hz). The signal strength is not constant
Requirement: Separation/suppress the interference signal from the combined signal using FFT &  Wavelet methods. The coding should be using C or Python and the solution should be applicable for   all the  range of measuring frequencies mentioned above
Data attached: Samples of 47Hz as measuring signal with 50Hz interference at three interference conditions (without, low, medium)
Sampling frequency: 6016 Hz
No.of cycles: 128
No of samples per cycle: 128

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