TWO-POSITION PHASE-SHIFT KEYED SIGNAL DEMODULATOR Russian patent published in 2019 - IPC H04L27/227 

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to radio engineering and can be used in radio receiving devices, namely – in two-phase phase manipulation signal detectors. Demodulator comprises first and second multipliers, first, second and third low-pass filters and phase analyzer, analogue-to-digital converter, input of which is input of demodulator, band-pass filter, proportional-integral-differential controller, direct digital synthesis module, and comparator, which output is demodulator output, wherein the analogue-to-digital converter output is connected to the input of the band-pass filter, the output of which is connected to the first inputs of the first and second multipliers, the second inputs of which are connected to corresponding outputs of the direct digital synthesis module, the control input of which is connected to the output of the proportional-integral-differential controller, wherein output of first low-pass filter is connected to first input of phase analyzer and comparator input, and output of second low-pass filter is connected to second input of phase analyzer, output of which is connected to input of third low-pass filter, output of which is connected to input of proportional-integral-differential controller.

EFFECT: reducing the probability of "reverse operation", providing stability regardless of initial phase uncertainty, providing detection of a received signal without any information on the nature of transmitted data, high noise immunity and reduced probability of phase tracking failure when there is considerable interference when receiving an information signal.

1 cl, 1 dwg