UW-CTSM: Circular Time Shift Modulation for Underwater Acoustic Communications
UW-CTSM: Circular Time Shift Modulation for Underwater Acoustic Communications
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DOI：
10.23919/wons54113.2022.9764464
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发表时间：
2022-03
期刊：
影响因子：
--
通讯作者：
Zhuoran Qi;D. Pompili
中科院分区：
文献类型：
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作者：
Zhuoran Qi;D. Pompili
脉冲位置调制(PPM)由于具有非相干可实现性而显示出巨大的优势。然而，PPM在水声信道中存在较高的多径时延。为了对水声通信中的多径时延和加性噪声的影响具有较强的鲁棒性，基于零相关区(ZCZ)信号的高自相关特性，提出了一种新的非相干实现的非线性调制方案--循环时移调制(CTSM)。利用2021年6月在北约海事研究和实验中心(CMRE)托管的滨海海洋观测网(LOON)试验台，基于在意大利拉斯佩齐亚湾收集的真实水声信道进行仿真，研究了CTSM在误码率方面的性能。结果表明，与PPM相比，CTSM系统在水声通信中具有更高的鲁棒性。
Pulse Position Modulation (PPM) has shown great advantages by being non-coherently implementable. However, PPM suffers from the high multipath delay in underwater acoustic channels. To be robust against the effects of multipath delay and additive noise in underwater acoustic communications, this project proposes a novel modulation scheme that is nonlinear and that can be implemented non-coherently, called the Circular Time Shift Modulation (CTSM) based on the high autocorrelation property of Zero-Correlation-Zone (ZCZ) signals. The performance of CTSM in terms of bit error rate is investigated by emulations based on real underwater acoustic channels collected in the Gulf of La Spezia, Italy, using the Littoral Ocean Observatory Network (LOON) testbed hosted at the NATO Centre for Maritime Research and Experimentation (CMRE) in June 2021. The results have shown that the CTSM system has higher robustness compared with PPM in underwater acoustic communications.