Signal Modulation Identification Method Based on Peak Position Discrimination
A technology of peak position and signal modulation, applied in modulation carrier systems, digital transmission systems, electrical components, etc., can solve the problems of high hardware cost, large amount of calculation, and reduced recognition accuracy, achieving easy engineering implementation and good robustness. , easy to achieve effect
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[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0043] The basic flow of the algorithm is as follows figure 2 shown.
[0044] The basic steps of the algorithm are:
[0045] (1) Find the peak position sequence peak(m) at the point where the peak value of the received signal is located;
[0046] (2) Perform linear fitting on the sequence peak(m) to obtain the fitting sequence linear_peak(m);
[0047] (3) Perform a difference fitting difference sequence peak_dif(m) on the above two sequences;
[0048] (4) Do a linear fit on peak_dif(m) to get the mean square error peak_mse;
[0049] (5) peak_mse and set threshold δ 1 For comparison, satisfy peak_mse1 Then go to step (6), otherwise go to step (7);
[0050] (6) peak_mse and set threshold δ 2 For comparison, satisfy peak_mse2 It is NLFM, if it is not satisfied, it is LFM;
[0051] (7) peak_mse and set threshold δ 3 For comparison, satisfy peak_ms...
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