Modulation type identification engineering implementation method and computer readable storage medium

Abstract

The application provides a modulation type identification engineering implementation method and a computer readable storage medium, and six common radar signal modulation modes are identified. The FFT result of the received pulse is subjected to spectrum trajectory smoothing, and the signal modulation characteristics are highlighted. An automatic multi-scale peak value searching algorithm is applied to the radar common signal modulation mode identification, the peak value characteristics of the spectrum are extracted, and the modulation type identification with single peak value, double peak value and multi-peak value spectrum characteristics is beneficial. An automatic bandwidth positioning method is used for positioning the narrow bandwidth signal or the wide bandwidth signal, and the spectrum can be symmetrical or asymmetrical. The spectrum symmetry degree measurement is used for separating and identifying the modulation mode with the asymmetrical spectrum characteristics. The FFT of the correlation function of the input pulse after the square operation or the fourth power operation is calculated, and the BPSK or QPSK identification can be carried out in combination with the spectrum trajectory smoothing. The application achieves the purpose of the modulation type identification under the low signal noise ratio condition.

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