А.V. Leushin1

1 Military Training and Research Center of the Ground Forces «Combined Arms Order of Zhukov Academy of the Armed Forces of the Russian Federation» (Moscow, Russia)

Currently, the use of LoRa modulation in radio engineering systems for transmitting information, in particular, in the field of Internet of things technology, is widely used. The issue of the advisability of using LoRa modulation in command radio control lines is not disclosed to date. The main task of command radio control links is to transmit a small amount of information over a long distance with high reliability, which predetermines increased requirements for an energy-efficient communication channel. Noise immunity refers to the main characteristics of radio engineering systems for transmitting information, the evaluation of which makes it possible to judge the effectiveness of building a radio engineering system. This work is devoted to assessing the maximum noise immunity of command radio control links operating with LoRa modulation, which will allow developers to make their choice in favor of using LoRa modulation in their systems.

In the work, an analytical expression is obtained for estimating the limiting value of the noise immunity index command radio control lines operating with LoRa modulation. A technique for assessing noise immunity has been developed. The dependence of the symbol error probability Pb on the signal-to-noise ratio for LoRa modulation in a stationary channel with additive white Gaussian noise has been refined.

The advantage of implementing command radio control links using LoRa modulation is shown according to the criterion of achieving the maximum possible value of noise immunity. The developed technique makes it possible to correctly select signal-code structures for newly developed command radio control links with LoRa modulation and perform calculations of the main quality indicators.

Leushin А.V. Maximum noise immunity of the command radio line, operating with LoRa-modulation. Achievements of modern radioelectronics. 2023. V. 77. № 2. P. 34–43. DOI: https://doi.org/10.18127/j20700784-202302-03 [in Russian]

1. Kotel'nikov V.A. Teoriya potentsial'noy pomekhoustoychivosti. M.: Gosenergoizdat. 1956. [in Russian]
2. Is'kiv V.M., Ignatenko M.A., Vatrich A.D. Primenenie tekhnologii Lora v sovremennykh radiostantsiyakh. Sovremennye problemy radioelektroniki i telekommunikatsiy. 2020. № 3. S. 91. [in Russian]
3. Grebeshkov A.Yu., Daraev D.M. Razrabotka intellektual'nogo sensornogo uzla na baze tekhnologii Lora. Infokommunika-tsionnye tekhnologii. 2021. T. 19. № 2. S. 179–186. [in Russian]
4. Marisov D.A. i dr. Internet veshchey v neftegazovoy sfere: analiz tekhnologii LORAWAN i vozmozhnosti prikladnogo primeneniya. PROneft'. Professional'no o nefti. 2019. № 2. S. 76–80. [in Russian]
5. Ashimov N.M. Pomekhoustoychivost' i pomekhozashchishchennost' radioliniy upravleniya. M.: VIU. 2000. [in Russian]
6. Ashimov N.M. Kriterii i metodologiya otsenki pomekhoustoychivosti i pomekhozashchishchennosti radiotekhnicheskikh sistem peredachi diskretnoy informatsii. Spetsial'naya tekhnika. 2011. № 2. S. 15–19. [in Russian]
7. Karasev A.I. Teoriya veroyatnostey i matematicheskaya statistika. Uchebnik dlya ekon. spetsial'nostey vuzov. Izd. 3-e, pererab. i dop. M.: Statistika. 1977. [in Russian]
8. Vygodskiy M.Ya. Spravochnik po matematike. M.: Astrel'. 2011. [in Russian]
9. SX1278 Datasheet (PDF). Semtech.Corporationhttps. URL: https://www.alldatasheet.com/datasheet-pdf/pdf/800241/SEMTECH/ SX1278.html. – (Data obrashcheniya: 11.11.2021).
10. Leushin A.V. LoRa-modulyatsiya kak novyy vid modulyatsii. Printsip raboty, osnovnye parametry, pomekhoustoychivost'. Tekhnika radiosvyazi. 2022. V. 2. S. 37–39. [in Russian]
11. Leushin A.V. Povyshenie pomekhoustoychivosti komandnoy radiolinii upravleniya signalom s OFDM. Tekhnika radiosvyazi. 2021. № 2. S. 7–21. [in Russian]
12. Leushin A.V. Potentsial'naya pomekhoustoychivost' komandnoy radiolinii upravleniya. Uspekhi sovremennoy radioelektroniki. 2022. T. 76. № 7. S. 20–29. DOI: https://doi.org/10.18127/j20700784-202207-02. [in Russian]
13. Elshabrawy T., Robert J. Closed-Form Approximation of LoRa- Modulation BER Performance. IEEE Communications Letters. Sept. 2018. V. 22. № 9. P. 1778–1781.
14. Reynders B., Pollin S. Chirp spread spectrum as a modulation technique for long range communication. Proc. Symp. Commun. Veh. Technol. (SCVT). Nov. 2016. P. 1–5.