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Research on the calculation method of signal-to-noise ratio of non-integer period sine waveform

  • 2013-09-22
  • 438.97KB
  • Points it Requires : 2

Taking dual-tone multi-frequency signal as an example, by using mathematical methods such as fast Fourier transform and Hanning window, the relationship between signal frequency, level and phase is analyzed, and the algorithm for calculating the signal-to-noise ratio of non-integer period sine waveform is derived, which solves the problem of low calculation accuracy of the signal-to-noise ratio of non-integer period sine waveform in digital signal processing. Experiments using C programming language prove the correctness and reusability of the algorithm, and can greatly improve work efficiency.

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