FIELD: electricity.
SUBSTANCE: method is realised by means of using procedures of initial assessment of a frequency shift based on a pilot signal and introduced with a channel in a multi-frequency modem with a differential multiple phase modulation and quadrature realisation of a modulator and demodulator; establishment of symbol synchronisation and tracking the position of symbol synchronisation and frequency shift with application of a working signal.
EFFECT: higher noise immunity of a device, also by elimination of impact from noise concentrated by spectrum and interfering with a frequency band of one of parallel subchannels to other subchannels.
1 cl, 40 dwg
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