海洋环境水下电磁场基本特性及抑制方法研究

目的掌握环境水下电磁场的基本特性以及适宜的降噪方法。方法从时域、频域、相关与极化等方面对某海域进行分析,并对得到的大量海洋环境水下电磁场特性进行总结,基于分析结果,研究自适应线谱增强技术在海洋环境水下电磁场抑制方面的应用。结果海洋环境水下电磁场具有一定的规律性和随机性,利用自适应线谱增强技术,信号强度增加了6 dB。结论通过对环境电磁场基本特性以及抑制方法的研究,可以对舰船测试中环境电磁场的影响程度进行评估,并提高目标的探测能力。

Research on Rudimentary Characteristics of Underwater Electromagnetic Field in Ocean Environment and Suppression Method

Objective To master the basic characteristics of underwater electromagnetic field in ocean environment and suitable noise reduction methods. Methods Firstly, from the time domain, frequency domain, correlation and polarization etc. , analyses on a large number of electromagnetic characteristics in certain areas were summarized. Based on analyses,we studied the application of adaptive line enhancement technology in suppression of underwater electromagnetic field in the ocean environment. Results The results showed that underwater electromagnetic field in ocean environment had certain regularity and randomness. Using adaptive line enhancement technology, we could see that the signal strength was increased by 6 dB. Conclusion Impact could be evaluated in the test ship and the detection capability of a target could be improved through studying the basic characteristics of environmental electromagnetic fields and the inhibition method.