Digital modulation signal classification method based on union features
A technology of digital modulation signal and classification method, applied in modulation type identification, digital transmission system, modulation carrier system, etc., can solve the problem of small application range, and achieve the effect of wide application range and high recognition rate
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[0015] Combine below Figure 1 to Figure 8 , the present invention is described in further detail.
[0016] refer to figure 1 , figure 2 , a kind of digital modulation signal classification method based on joint feature, comprises the steps: (A) receiving end obtains intermediate frequency real signal after ADC sampling to the signal that intercepts; Therefore, it is necessary to preprocess the intermediate frequency real signal to obtain the intermediate frequency complex signal; (C) obtain the instantaneous feature quantity, high-order statistics, and spectral features of the intermediate frequency complex signal, and identify the signal according to these features. The spectral features here include Spectrum, square spectrum, fourth power spectrum, etc., if the identified signal is 2ASK signal, BPSK signal, QPSK signal, OQPSK signal, 8PSK signal, the classification ends; if the identified signal is MFSK or MQAM modulation category, then Execute the next step; (D) carry ...
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