Lake Experimentation of in-Band Full-Duplex Underwater Acoustic Communications With a Receiving Array
Lake Experimentation of in-Band Full-Duplex Underwater Acoustic Communications With a Receiving Array
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DOI：
10.1109/access.2023.3250444
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发表时间：
2022-04
期刊：
影响因子：
3.9
通讯作者：
Zheng Guo;A. Song;Mohammad Towliat;L. Cimini;X. Xia
中科院分区：
文献类型：
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作者：
Zheng Guo;A. Song;Mohammad Towliat;L. Cimini;X. Xia
带内全双工（IBFD）通信是一种很有前途的技术，以实现在水下环境中的频谱效率的通信。要实现IBFD水下通信，抑制自干扰是前提。在本文中，SI抑制使用物理分离和数字SI消除在不同的发射机-接收机的几何形状进行了研究。提出了一种结合联合信道估计、信号干扰消除和多信道判决反馈均衡器的迭代IBFD接收机。由于信道估计精度的潜在恶化，使用数字SI消除控制机制来调节抑制过程。在湖泊环境中测试了相干IBFD水声通信的可行性。使用实验测量来评估两种SI抑制方法、SI消除控制机制和接收器性能。IBFD通信在80 m范围内的误码率（BER）为10 - 2。
In-band full-duplex (IBFD) communications is a promising technique to achieve spectral-efficient communication in the underwater environment. To achieve IBFD underwater communications, suppression of self-interference (SI) is a prerequisite. In this paper, SI suppression using physical separation and digital SI cancellation is investigated under different transmitter-receiver geometries. An iterative IBFD receiver combining joint channel estimation, SI cancellation, and multichannel decision feedback equalizer is developed. Due to the potential deterioration of the channel estimation accuracy, a digital SI cancellation control mechanism is used to regulate the suppression process. The feasibility of coherent IBFD underwater acoustic communications was tested in a lake environment. The two SI suppression methods, the SI cancellation control mechanism, and the receiver performance were evaluated using the experimental measurements. A bit error rate (BER) in the order of $10^{-2}$ was achieved at the range of 80 m for IBFD communications.