V.B. Manelis1, D.V. Shatilov2, A.B. Tokarev3

1-3 JSC «IRCOS» (Moscow, Russia)

2,3 FSBEI of HE «Voronezh State Technical University» (Voronezh, Russia)

1 vbm@ircoc.vrn.ru; 2 shatilovdv@ircoc.vrn.ru; 3 tokarevab@ircoc.vrn.ru

Formulation of the problem. LoRaWAN wireless data transmission technology is one of the actively developing technologies for remote device communication (“Internet of things”). LoRa-terminals use low-cost reference generators, which can cause significant frequency and clock shifts. Ensuring high-precision frequency and clock synchronization is a key factor in the successful reception of LoRa-signals.

The aim of the work is to develop an algorithm for frequency-time and clock synchronization of the LoRa-signal, which ensures high synchronization accuracy and successful reception of message in conditions of low signal-to-noise rations, significant frequency and clock shifts.

Results. An noise-resistant algorithm of frequency-time and clock synchronization for receiving LoRa-signals is presented. The algorithm is based on the use of the signal structure and has been successfully tested both by computer simulation and on real signals.

Practical significance. The presented synchronization algorithm has been successfully implemented in the Russian portable signal analyzer of radio networks Arsenal-I for the analysis of LoRa-signals. The analyzer is actively used by network operators and radio monitoring services.

Manelis V.B., Shatilov D.V., Tokarev A.B. Frequency-time and clock synchronization of LoRa-signals. Radiotekhnika. 2025. V. 89. № 7. P. 47−51. DOI: https://doi.org/10.18127/j00338486-202507-09 (In Russian)

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