Chirp-based Frequency Shift Keying for Underwater Acoustic Communications

In underwater acoustic channels, communication environments are generally poor due to multipath with long delays and Doppler. Since communication signals suffer from intersymbol interference (ISI), frequency-selective fading, and short correlation time, the communication performances degrade. This p...

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Bibliographic Details
Published in2024 Fifteenth International Conference on Ubiquitous and Future Networks (ICUFN) pp. 594 - 596
Main Authors Kim, Jinwon, Seo, Bogeun, Han, Sangman, Cho, Kiha, Ko, Haklim, Lee, Hojun
Format Conference Proceeding
LanguageEnglish
Published IEEE 02.07.2024
Subjects
Chirp
Computer simulation
Delays
Fading channels
Frequency shift keying
FSK
Intersymbol interference
maximum ratio combining
multipath
Time-frequency analysis
Underwater communications
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Summary:In underwater acoustic channels, communication environments are generally poor due to multipath with long delays and Doppler. Since communication signals suffer from intersymbol interference (ISI), frequency-selective fading, and short correlation time, the communication performances degrade. This paper proposes a chirp-based frequency shift keying (C-FSK) and multipath combining scheme. The proposed C-FSK replaces the tone basis of the conventional FSK with the chirp signal, which aims to overcome the underwater acoustic channels. Computer simulations demonstrate that the proposed C-FSK improves BER performances by 6 dB of signal-to-noise power ratio compared to the conventional FSK.
ISSN:2165-8536
DOI:10.1109/ICUFN61752.2024.10625492