Abstract
Introduction. The synthesis mathematical model procedure of coherent demodulation of synchronous mutually nonorthogonal digital signals with minimum frequency-shift keying is the basic and purpose of this article. Synthesis method of mathematical model coherent demodulation of synchronous mutually nonorthogonal digital signals with minimum frequency-shift keying. Coherent demodulations of powerful signal interference with minimum frequency-shift keying and useful digital signal with minimum frequency-shift keying in a channel with additive white noise are showed. In absence of signal interference this procedure degenerates in classic coherent demodulation of digital signal with minimum frequency-shift keying. When the power of signal interference is much greater power of the useful digital signal with a minimum frequency-shift keying the interference protection receiving in the channel with additive white noise there is such when a signal interference missing. Conclusions. This mathematical model procedure can be used in modem compensators for realization of the repeated use of frequency resource and in development of perspective protection from signal interference of radio contact facilities.
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