Underwater communication system for shallow water environments using FSK modulation
DOI:
https://doi.org/10.54939/1859-1043.j.mst.IITE.2025.107-114Keywords:
Underwater acoustic; FSK modulation; Matched filter.Abstract
Underwater acoustic communication presents significant challenges due to complex environmental factors such as noise, multipath propagation, and time-varying channel conditions. This paper presents an underwater communication system employing Frequency Shift Keying (FSK) modulation with matched filter-based demodulation to mitigate the impact of noise in shallow water environments, suited to Vietnam’s marine area. By leveraging the optimal signal detection capability of the matched filter in noisy and time-varying channels, the system significantly improves communication reliability under harsh underwater conditions. Simulation results demonstrate that the proposed FSK-based system achieves a bit error rate (BER) below 10⁻³ at a signal-to-noise ratio (SNR) exceeding 20 dB. These findings suggest that FSK modulation, combined with matched filter demodulation, is a suitable solution for underwater communication in shallow water scenarios.
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