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This paper describes problems of multi-level classification of real M-PSK modulated signal frames by using methods based on constellation shapes. Modulation classifiers which automatically recognise the type of modulation in HF band have been developed. One of the oldest of modulation recogniser uses a bank of demodulators. Each of demodulaters is recognized only one type of modulation.
The paper is aimed at the analysis of possibilities of the implementation of the hyperbolic TDOA (Time Difference Of Arrival) based system intended for aircraft navigation during the approach to landing phase of flight. For this purpose, conventional systems like ILS, MLS, GNSS, etc. are used today. Requirements on hyperbolic system were determined based on accuracy of actually utilized systems. The...
This paper deals with perspective methods of radar pulses classification. Ability to classify pulses is required by ELINT in order to deinterleave signals and unambiguously identify the source of analyzed signal. Experiments has shown that the best classification methods are based on auto-correlation, cross-correlation, and frequency spectrum analysis. Some other pulse feature are incorporated for...
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