METHOD FOR DETERMINING DOPPLER FREQUENCY SHIFT BASED ON AN INFORMATION PHASE-MANIPULATED SIGNAL BASED ON ANALYSIS OF DEVIATION OF PHASE DIFFERENCE 2 OF ORDER

摘要

FIELD: radio engineering and communications.;SUBSTANCE: invention relates to the field of electrical radio engineering, namely to the radio communication equipment, and can be used in single-frequency data transmission systems, as well as in radio sounding systems for measuring Doppler shift of signal carrier frequency in information-measuring devices without a priori information on modulating message. To achieve the technical result, receiving an information phase-shift signal corresponding to N symbols, evaluating phase values F₁, F₂, F₃ each three adjacent symbols, phase difference is calculated ΔF₁= Φ₃-2⋅F₂+ F₁ and ΔF₂=F₃-F₁, obtained phase differences are converted ΔF'₁=atan2(sin(ΔF₁), cos(ΔF₁)) and ΔF'₂= atan2(sin(ΔF₂), cos(ΔF₂)), calculating difference of converted phase differences ΔΨ=ΔF'₂-ΔF'₁, after which calculating exponent, obtaining value exp (i⋅ΔΨ), are summed with obtained N-2 values of exponentials after which the phase of total accumulated vector is calculated, obtaining phase value ψ, which is multiplied by factor of 1/(4πT_symbol)=F_symbol/(4π), where T_symbol is symbol duration, F_symbol is the symbol repetition frequency, resulting in the Doppler frequency shift value.;EFFECT: determination of Doppler shift of frequency on information (that is to say unknown) phase-manipulated signal with absolute, relative or phase-difference phase manipulation.;1 cl, 1 dwg