METHOD AND DEVICE ( VERSIONS ) EVALUATING CARRIER FREQUENCY Russian patent published in 1999 - IPC

FIELD: radio measurement instruments. SUBSTANCE: proposed methods of evaluation o carrier frequency make it possible to measure frequency under stricter conditions of reception. Devices for implementation of these methods include phase shifters of delay line, first and second signal conversion units, analog-to-digital converters, Fourier transform units, units determining power density, first and second storages, units of filters, control units, frequency determining units, Hilbert transform units, units of discrete cosine transform and determination of spectral power density, units computing square of modulus of analytical signal, subtracters, fast Fourier transform units, units of inverse Fourier transform, commutators. EFFECT: increased noise immunity and accuracy of evaluation of carrier frequency thanks to bolder presentation of spectrum of signal. 26 cl, 24 dwg