2025_programme: Performance Analysis of Underwater Acoustic Communication with DWT-Based Watermarking

• Day: June 19, Thursday
    Location / Time: D. CHLOE at 14:50-15:10
• Last minutes changes: -
• Session: 21. Underwater Communications and Networking
  Organiser(s): Charalampos Tsimenidis, Paul Mitchell, Konstantinos Pelekanakis
  Chairperson(s): Charalampos Tsimenidis, Paul Mitchell, Konstantinos Pelekanakis
• Lecture: Performance Analysis of Underwater Acoustic Communication with DWT-Based Watermarking
  Paper ID: 2241
  Author(s): Jongwook Choi, Beomsik Kim, Sunhyo Kim, Hansoo Kim, Sungho Cho, Donhyug Kang, Jee Woong Choi
  Presenter: Jongwook Choi
  Abstract: The underwater acoustic communication channel has limited bandwidth due to background noise, multipath propagation, and significant absorption loss at high frequencies. This limitation makes it challenging to identify communication signal sources when multiple users communicate simultaneously. To address this issue, we applied audio watermarking, a technique for embedding data into audio signals in a manner that is imperceptible to other communication users. However, increasing the watermark strength may degrade communication performance, while decreasing it may reduce watermark detection accuracy. Therefore, determining the optimal watermark strength is essential.\nIn this study, we analyzed the trade-off between watermark detection accuracy and communication performance as a function of watermark strength through simulations. To evaluate these performances, we defined a novel performance metric that integrates both aspects. Noise-robust, DWT (Discrete Wavelet Transform)-based spread spectrum watermarking was employed to account for the multipath propagation of acoustic waves and the presence of ambient noise. Simulations were performed over AWGN (Additive White Gaussian Noise) and multipath channels to assess the impact of watermark strength on the defined performance metric. Additionally, we explored the relationship between communication channel parameters and the proposed metric. Finally, the validity of the watermark strength determined by the metric was verified through water tank experiments, demonstrating its effectiveness in practical scenarios.\n\nThis work was supported by the Korea Research Institute for defense Technology planning and advancement (KRIT) grant funded by the Korean Government (DAPA (Defense Acquisition Program Administration)) in 2025 (No. KRIT-CT-22-056, Study on the signal modelling and reproduction of the marine life sound)
• Corresponding author: Mr Jongwook Choi
  Affiliation: Hanyang university ERICA
  Country: Korea, Republic of