王晓玮, 周其斗, 谢志勇, 吕晓军, 唐永壮. 大多普勒条件下水声通信信号快速捕获算法的试验验证[J]. 中国舰船研究. DOI: 10.19693/j.issn.1673-3185.03469
引用本文: 王晓玮, 周其斗, 谢志勇, 吕晓军, 唐永壮. 大多普勒条件下水声通信信号快速捕获算法的试验验证[J]. 中国舰船研究. DOI: 10.19693/j.issn.1673-3185.03469
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Experimental validation of a fast acquisition algorithm for underwater acoustic communication signals under large Doppler conditions[J]. Chinese Journal of Ship Research. DOI: 10.19693/j.issn.1673-3185.03469
Citation: Experimental validation of a fast acquisition algorithm for underwater acoustic communication signals under large Doppler conditions[J]. Chinese Journal of Ship Research. DOI: 10.19693/j.issn.1673-3185.03469
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大多普勒条件下水声通信信号快速捕获算法的试验验证

Experimental validation of a fast acquisition algorithm for underwater acoustic communication signals under large Doppler conditions

    摘要
  • 摘要: 【目的】水声通信信号的快速检测与估计是形成水下信息空间的基础，对大多普勒条件下水声通信信号进行快速捕获是实施声学导航、定位、通信和主动目标探测的第一步。【方法】针对水中实施大多普勒水声通信试验成本高、风险大这一难题，提出了一种在空气中进行声学试验的方法，以信噪比、多普勒因子、捕获误差以及捕获时间作为衡量指标，对提出的基于双差分-FFT时频联合估计算法的捕获性能进行了试验验证。【结果】试验结果表明：通过合理选择捕获序列，可以在信噪比-9 dB，多普勒因子达到1.2×10-2的恶劣条件下实现运动信号的快速捕获，捕获误差低于1%，与传统FFT捕获算法相比，所提出的算法捕获速度在大多普勒频移时有显著优势，验证了声学系统信号捕获算法的有效性以及该试

     

    Abstract: Objectives The foundation for creating an underwater cyberspace is the acquisition of acoustic signals from moving underwater targets, and the implementation of acoustic navigation, positioning, communication, and active target detection begins with the acquisition of acoustic signals in relative motion under interference conditions. Methods Aiming at the problem of high cost and high risk in the acquisition test of moving target acoustic signal in water, a method of acoustic test in air was proposed. The acquisition performance of the time-frequency joint estimation algorithm based on double difference-FFT proposed in this ?

     

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