O.N. Chirkov1, A.V. Bashkirov2

1,2 FSBEI of HE “Voronezh State Technical University” (Voronezh, Russia)

1 chir_oleg@mail.ru; 2 fabi7@mail.ru

Problem statement. The organization of noise-resistant wireless underwater acoustic communication is not a simple and solved task. One of the main problems is the multipath propagation of a sound acoustic wave as a result of re–reflections from the seabed surface and a change in the frequency of signal vibrations when the receiver and transmitter move relative to each other. Thus, finding a channel evaluation solution that can improve the quality of communication is an urgent task for developers of underwater acoustic communication systems.

Purpose. To consider the possibility of developing effective methods for processing underwater acoustic communication signals with high noise immunity by evaluating the communication channel.

Results. The possibility of using an adaptive filter with a sliding window to evaluate the channel during high-speed data transmission in underwater acoustic communication is shown. The simulation results showed that the proposed adaptive filter with a sliding window surpasses the normalized adaptive filters in terms of the BER bit error and wins over additive filters with an exponential window in reducing the number of mathematical operations. When modeling wireless acoustic communication systems with OFDM, error-free data transmission with a spectral efficiency of 0.33 bits/s/Hz was achieved.

Practical significance. The obtained results can be used to improve the wireless transmission of data in underwater acoustic communication due to the proposed algorithm of the adaptive filter.

Chirkov O.N., Bashkirov A.V. Improving the efficiency of channel evaluation during high-speed data transmission in underwater acoustic communication with OFDM. Radiotekhnika. 2024. V. 88. № 7. P. 45−49. DOI: https://doi.org/10.18127/j00338486-202407-09 (In Russian)

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