Phase Compensation Self-interference Cancellation Method for Full-duplex Single-carrier Underwater Acoustic Communication

WU Songwen; LU Yinheng; ZHOU Feng; QING Xin; LI Yanlong; ZHAO Zichen

doi:10.11993/j.issn.2096-3920.2025-0157

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WU Songwen, LU Yinheng, ZHOU Feng, QING Xin, LI Yanlong, ZHAO Zichen. Phase Compensation Self-interference Cancellation Method for Full-duplex Single-carrier Underwater Acoustic Communication[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0157

Citation:

WU Songwen, LU Yinheng, ZHOU Feng, QING Xin, LI Yanlong, ZHAO Zichen. Phase Compensation Self-interference Cancellation Method for Full-duplex Single-carrier Underwater Acoustic Communication[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0157

Citation:

WU Songwen, LU Yinheng, ZHOU Feng, QING Xin, LI Yanlong, ZHAO Zichen. Phase Compensation Self-interference Cancellation Method for Full-duplex Single-carrier Underwater Acoustic Communication[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0157

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Phase Compensation Self-interference Cancellation Method for Full-duplex Single-carrier Underwater Acoustic Communication

doi: 10.11993/j.issn.2096-3920.2025-0157

WU Songwen^{1, 2, 3, 4
,},
LU Yinheng^5
,,
ZHOU Feng^{1, 2, 3, 4
,},
QING Xin^{1, 2, 3, 4
,},
LI Yanlong^{1, 2, 3, 4
,},
ZHAO Zichen^{1, 2, 3
,}

1.
National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, China
2.
Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China
3.
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China
4.
Sanya Nanhai Innovation and Development Base of Harbin Engineering University, Sanya 572024, China
5.
Hanjiang National Laboratory, Wuhan, 430060

Received Date: 2025-11-19
Accepted Date: 2025-12-25
Rev Recd Date: 2025-12-24

Available Online: 2026-01-12

Abstract

Abstract

Aiming at the problem that the self-interference cancellation performance is degraded due to the phase mismatch between the transmitting and receiving samples in the in-band full-duplex underwater acoustic communication, this paper proposes a method to improve the self-interference cancellation through two-stage phase compensation in single-carrier communication. The traditional method assumes that the phase of the reference signal is consistent with the phase of the received signal, and directly cancels under this premise. In contrast, this paper introduces phase compensation into the construction process of the reference signal, and takes the minimum residual energy as the optimization goal. This method first estimates the initial phase based on the correlation between the reference signal and the received signal, and further searches in the field of this result to find the optimal compensation phase and compensate, and combines the adaptive filtering algorithm to improve the self-interference cancellation ability. The effectiveness of the proposed method is verified by the simulation of single frequency signal and QPSK signal, the pool experiments and sea experiments. The results show that after phase compensation, the self-interference cancellation performance of the system is improved, the self-interference cancellation performance in the pool experiment is improved by 5.289 dB, and the self-interference cancellation performance in the sea trial experiment is improved by 1.986 dB. After compensation, the main side lobe ratio of the correlation peak of the far-end signal demodulation is optimized. The phase compensation method proposed in this paper can effectively improve the self-interference cancellation performance and filter convergence speed, thereby improving the accuracy of system demodulation, and providing key technical support for the practical application of full-duplex underwater acoustic communication.
- Full-duplex underwater acoustic communication,
- self-interference cancellation,
- phase compensation,
- single carrier,
- adaptive filtering

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References(17)

References

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