D.Yu. Shidlovskii1, D.V. Chashchin2, N.A. Vorobev3, A.N. Konev4, P.V. Luferchik5

1 JSC «Laboratoriya matematiki» (Vladimir, Russia)
2–5 JSC SPE «Radiosvyaz» (Krasnoyarsk, Russia)
1 dima@labmat.su, 2 chaschin_dv@krtz.su, 3 vorobev_na@krtz.su, 4 konev_an@krtz.su, 5 lpv@krtz.su

Orthogonal frequency-time division multiplexing (OFDM) and orthogonal frequency-time domain modulation (OTFS) are two key technologies for data transmission in modern wireless networks. OFDM is widely used in LTE and 5G communication standards due to its high spectral efficiency and multipath immunity. However, in tropospheric channels, where the Doppler effect and time delays significantly reduce transmission, traditional methods such as OFDM have their limitations.

It is required to develop a model for evaluating OFDM and OTFS modulation in a tropospheric channel. To evaluate the efficiency of using modulation in orthogonal frequency-time space (OTFS) for use in tropospheric communication channels and compare with OFDM.

This article describes an example of using modulation in orthogonal time-frequency space (OTFS). A model for evaluating OFDM and OTFS modulation in a tropospheric channel is developed. The result of comparing bit errors when using OFDM and OTFS modulation in a tropospheric channel simulation is shown. The advantages of using OTFS modulation in a tropospheric channel are described.

The use of OTFS modulation in tropospheric communication stations will allow to combat multipath more effectively, as well as improve the overall stability of the channel. In the future, it is possible to implement OTFS modulation in a tropospheric communication station to confirm the results.

Shidlovskii D.Yu., Vorobev N.A., Chashchin D.V., Konev A.N., Luferchik P.V. Research on the possibility of using modulation in Orthogonal Time-Frequency Space in troposcatter communication systems. Achievements of modern radioelectronics. 2025. V. 79. № 2. P. 22–29. DOI: https://doi.org/10.18127/j20700784-202502-03 [in Russian]

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