Optimization of radio signal parameters with nonlinear distortions in the radio track

DOI: 10.31673/2412-9070.2023.035060

Abstract

The realization of the possibilities of communication systems depends significantly on the quality indicators of the management system and its material basis - the communication system itself, especially during the full-scale invasion of Russia on the territory of our state. Currently, the readiness, probabilistic-temporal and operational-technical characteristics of control and communication systems are as important indicators as the number and quality of means of countering the enemy. In order to increase the effectiveness of the functioning of the mobile components of the special communication systems, it is planned to make extensive use of radio communication equipment and systems in their composition. This will allow solving the existing problems of continuity and stability of management already in the near future and opens further prospects for improving the operational and technical characteristics of the special communication system as a whole Orthogonal Frequency Division Multiplexing (OFDM) is widely used in the construction of radio communication systems. A lot of attention is paid to the construction of signal-code structures (SCC), which allow to increase the speed of information transmission with restrictions on energy and bandwidth of operating frequencies. The article proposes a technique that consists in building a signal-code structure with optimal parameters according to the criterion of maximum frequency efficiency while limiting the probability of false reception of signals in the conditions of nonlinear signal distortions in the radio path, which allows to increase the speed of information transmission with restrictions on energy and bandwidth operating frequencies (increase the frequency efficiency of the system). Increasing the frequency efficiency of SRS with OFDM by matching the form of the transmitted signals and the type of modulation with the parameters of the communication channel without additional expansion of the channel bandwidth and increasing the transmitter power is a rather urgent task.

Keywords: radio signal; immunity to interference; energy efficiency; signal-code design.

References
1. Xuanjie Luo. The application of OFDM in optical fiber communication systems. IOP Conference Series: Earth and Environmental Science, Volume 332, Issue 4. 2019 IOP Conf. Ser.: Earth Environ. Sci. 332042010.
2. Mathematical model of orthogonal frequency distribution and multiplexing (OFDM) signals / I. Gorbenko, O. Zamula, V. Morozov, S. Rodionov // Radiotekhnika, 2019. 3(198). Р. 32–43.
3. ASCO-OFDM based VLC system throughput improvement using PAPR precoding reduction techniques / Sara M. Farid, Mona Z. Saleh, Hesham M. Elbadawy, Salwa H. Elramly // Optical and Quantum Electronics, 10.1007/s11082-023-04651-w, 55, 5, 2023.
4. Samir M. Hameed, Atheer A. Sabri, Sinan M. Abdulsatar. Filtered OFDM for underwater wireless optical communication, Optical and Quantum Electronics, 10.1007/s11082-022-04359-3,55, 1, 2022.
5. Стеклов В. К., Беркман Л. Н., Кільчицький Є. В. Оптимізація та моделювання пристроїв і систем зв'язку: підруч. для вищ. навч. закл. Київ: Техніка, 2004. 576 c.
6. Кувшинов О. В. Оцінка ефективності сигнально-кодових конструкцій з багатопозиційною частотною маніпуляцією. Київ: Збірник наукових праць ВІТІ НТУУ «КПІ», 2002. Вип. 4. С. 138–144.
7. Кувшинов О. В. Методика вибору сигнально-кодових конструкцій в системах рухомого радіозв’язку / Зв’язок. 2002. № 3. С. 30–34.
8. Tolіupa S. V., Parkhomenko I. I. Methodology of selecting optimal parameters of OFDM- SCC in conditions of selective stopping in radio path.Science and Education a New Dimension // Natural and Technical Sciences, III(8), Issue: 73, Будапешт. 2015. С. 81–85.
9. Toliupa S., Babenko T. Тhe method of forming and signal processing aimed at improving stealth and energy efficiency // Радіотехніка та телекомунікації. Львів. НУ «Львівська політехніка». 2017. №2. С. 121–130.
10. Міночкін Д. А., Борисов І. В. Метод контролю стану каналу зв’язку із селективними завмираннями. Київ: Збірник наукових праць ВІТІ НТУУ «КПІ», 2006. Вип. 3. С. 66–71.
11. Метод синтезу демодуляторів сигналів у тропосферних каналах за наявності частотно-селективних завмирань / Л. Н. Беркман, С. В. Козелков, О. С. Панкратова и др. // Зв'язок. 2017. № 1. С. 8–12