Two-Time Procedure for Calculation of Carrier Frequency of Phasomodulated in Communication Systems

Main Article Content

Oleksandr Leonidovich Turovsky
Vadym Vlasenko
Nataliia Rudenko
Oleksandr Golubenko
Oleh Kitura
Oleksandr Drobyk

Abstract

The use in radio communication systems of phase modulation of a signal intended for the transmission of useful information in a continuous mode creates the problem of frequency uncertainty of the received signal by frequency.In practice, it is not possible to implement frequency estimation in the conditions of chat uncertainty of the signal in the channel with low energy of the signal received in the continuous mode. Therefore, the estimation of the carrier frequency offset of the signal received relative to the nominal value is carried out before other synchronization procedures are included, namely: phase synchronization and clock synchronization. The paper generalizes the procedure and forms a two-step procedure for calculating the carrier frequency of the phase-modulated signal of a radio communication system for data transmission in a continuous mode, taking into account the condition of uncertainty of all signal parameters. Achieving the minimum observation interval in the given order of calculation of the carrier frequency is ensured by the use of the fast Fourier transform function. In order to analyze the effectiveness of this procedure, the process of estimating the carrier frequency of the phase-modulated signal of the radio communication system during data transmission in continuous mode and functional dependences of the maximum frequency in the signal spectrum and the minimum variance of carrier frequency estimation. This procedure allows a two-stage assessment of the carrier frequency according to the rule of maximum likelihood, taking into account the condition of uncertainty of all parameters of the signal received by the satellite communication system in a continuous mode with a minimum observation interval. Achieving the minimum observation interval in the given order of carrier frequency estimation is ensured by using the fast Fourier transform function and two estimation steps. The analysis of the efficiency of the estimation of the specified order was carried out on the basis of comparison of a ratio of the received minimum variance of an estimation of a carrier frequency and theoretically possible border of the minimum variance.

Article Details

How to Cite
Turovsky, O. L., Vlasenko, V., Rudenko, N., Golubenko, O., Kitura, O., & Drobyk, O. (2022). Two-Time Procedure for Calculation of Carrier Frequency of Phasomodulated in Communication Systems. International Journal of Communication Networks and Information Security (IJCNIS), 13(3). https://doi.org/10.17762/ijcnis.v13i3.5165 (Original work published December 25, 2021)
Section
Research Articles
Author Biographies

Oleksandr Leonidovich Turovsky, National Aviation University, Kyiv, Ukraine, 03058

Доктор технических наук, доцент,Департамент информационной безопасностиНациональный Авиационный Университет

Vadym Vlasenko, State University of telecommunications, Kyiv, Ukraine, 03110

Кандидат технических наук,Учебно-методический центрГосударственный университет телекоммуникаций 

Nataliia Rudenko, State University of Telecommunications, Kyiv, Ukraine, 03110

Кандидат технических наук,Учебно-научный институт связи,Государственный университет телекоммуникаций, 

Oleksandr Golubenko, State University of Telecommunications, Kyiv, Ukraine, 03110

Кандидат технических наук,Учебно-методический центрГосударственный университет телекоммуникаций  

Oleh Kitura, State University of Telecommunications, Kyiv, Ukraine, 03110

Учебно-научный институт связи,Государственный университет телекоммуникаций, 

Oleksandr Drobyk, State University of Telecommunications, Kyiv, Ukraine, 03110

Кандидат технических наук, профессорНаучный центр,Государственный университет телекоммуникаций, 

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