DIGITAL COHERENT DEMODULATOR OF FOUR-POSITION SIGNAL WITH PHASE MANIPULATION

摘要

FIELD: radio engineering and communications.;SUBSTANCE: invention relates to radio engineering. Digital coherent demodulator of a four-position signal with phase manipulation contains an analog-to-digital converter (ADC), a shift register of multi-digit codes for four samples, first and second n-stage signal quadrature processing channels (QPC), a clock generator, a summing device, a subtracting device, a multiplier and a resolver, wherein the outputs of the first and second QPCs are connected to the first and second inputs of the summing device and to the first and second inputs of the subtracting device, the output of the summing device is connected to the first input of the resolver and to the first input of the multiplier, the second input of the resolver is connected to the output of the summing device, the output of the multiplier is connected to the second input of the resolver, a binary two-digit code of the received information symbol is generated at the output of the resolver, synchronous pulses from the phase synchronization system are fed to the control input of the clock generator, and the demodulator symbolic synchronization signal is fed to the control input of the resolver.;EFFECT: technical result is to provide high-speed digital coherent demodulation of signals with four-position phase shift keying.;1 cl, 1 tbl, 6 dwg