Modulation Classification using the Power Spectrum of Detected Signals

V. Matic and V. Tadic (Serbia & Montenegro)


modulation classification, spectral analysis, digital signalprocessing, software application.


Modulation classifier, a device that automatically recognizes the modulation type of detected signal, plays an important role in certain communications applications. One solution of a modulation classifier is described in the paper. It is based on the pattern-recognition method, while the power spectrum is applied as a signal feature that can indicate its modulation type. The classification algorithm is developed as a software application using digital signal processing technique. The realized device allows real time recognition of most AM and FM emissions usually met in HF, VHF and UHF frequency bands. Simultaneously, the function of spectrum monitoring is enabled.

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