An anti-interference acoustic detection method for cross-water-air medium communication

Yiguang Yang; Yicheng Wen; Xujin Li; Weihong Zhang; Wei Wang; Jianquan Yao

doi:10.1117/12.3050319

18 November 2024 An anti-interference acoustic detection method for cross-water-air medium communication

Yiguang Yang, Yicheng Wen, Xujin Li, Weihong Zhang, Wei Wang, Jianquan Yao

Proceedings Volume 13398, Fourth International Conference on Optics and Communication Technology (ICOCT 2024); 1339819 (2024) https://doi.org/10.1117/12.3050319
Event: Fourth International Conference on Optics and Communication Technology (ICOCT 2024), 2024, Nanjing, China

Abstract

In cross-water-air medium communication using laser detection for signal reception, the detection signal is susceptible to external noise interference, leading to a degradation in communication quality. This paper proposes an anti-interference acoustic detection scheme for laser detection equipment. The scheme first transforms the traditional underwater MFSK (Multi Frequency Shift Keying) modulation method into M-LFM (Multi-Linear Frequency Modulated) modulation, encoding information into the slope information of the LFM signal. Subsequently, at the laser detection equipment signal reception end in the air, the received signal is preprocessed using optimal fractional Fourier transform to eliminate abnormal impulse noise and then inverse transformed into the time domain. Finally, the preprocessed signal is matched with the modulated baseband M-LFM signal to complete information demodulation. The simulation results show that the communication scheme in this paper can ensure the correct decoding of the signal under the external high-intensity and wide-band ambient noise interference, and at the same time, the effectiveness of the scheme is verified through the pool test, which confirms that it is able to enhance the quality of trans-water-air medium communication.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yiguang Yang, Yicheng Wen, Xujin Li, Weihong Zhang, Wei Wang, and Jianquan Yao "An anti-interference acoustic detection method for cross-water-air medium communication", Proc. SPIE 13398, Fourth International Conference on Optics and Communication Technology (ICOCT 2024), 1339819 (18 November 2024); https://doi.org/10.1117/12.3050319

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KEYWORDS

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Signal detection

Interference (communication)

Modulation

Signal to noise ratio

Electronic filtering

Signal processing

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