FIELD: radio engineering.
SUBSTANCE: amplitude-phase keying input signal is correlated by means of reference oscillation from controlled voltage generator to produce quadrature signals which are subjected to analog-to-digital conversion so as to obtain digital cophasal and quadrature readings which are used to calculate first estimate of phase as arctangent ratio of quadrature and cophasal readings with the result that recovered carrier frequency of amplitude-phase keying input signal is obtained at controlled-voltage generator output.
EFFECT: enhanced noise immunity due to reduced keying noise in control voltage at controlled-voltage generator input.
1 cl, 3 dwg
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