期刊文献+

低频线谱检测ALE算法应用 被引量:4

Applications of Adaptive Line-spectrum Enhancement Algorithm to the Detection of Low Frequency Line-spectrum Signal
原文传递
导出
摘要 舰船辐射噪声在低频段具有稳定的特征信息丰富的线谱成分,此线谱成分的检测对水下目标的定位和识别具有重要意义。为了有效地将舰船辐射噪声特征线谱从宽带背景噪声中分离出来,应用ALE算法理论对舰船噪声信号进行研究。ALE算法作为自适应FIRDF算法的一种变形,是自适应噪声抵消器的典型应用。低频线谱检测中采用ALE算法无需参考信号,自适应地将线谱成分信号进行匹配,可以从宽带噪声中将线谱成分分离出来,且线谱成分明显增强。理论分析仿真结合实际海试数据对LOFAR谱图进行研究,结果表明,ALE算法在低频线谱信号检测中能够达到期望的效果。与常规方法相比,检测性能得到有效提高,有利于辐射噪声线谱的提取。 The ship-radiated noise possesses a stable part of the line-spectrum at low frequency range, containing rich information, and it is meaningful for positioning and distinguishing underwater targets. In order to separate the ship-radiated noise line-spectra from the broadband background noise effectively, the method for analyzing the ship-radiated noise signals by using Adaptive Line-spectrum Enhancement (ALE) algorithm is put forward. As a variant of adaptive Finite Impulse Response (FIR) Digital Filter (DF), ALE is a typical application of adaptive noise canceller. The algorithm is able to find and match the line-spectrum signals and separate them from wide band addictive noise without reference signals. Then, the line-spectrum signals could be enhanced. By theoretical analysis simulation and actual ocean-trial, the research on the Low Frequency Acquisition and Ranging (LOFAR) spectrum shows that ALE algorithm is able to meet the expectation competently. Comparing with conventional methods, the detection performance enhances observably, and radiated noise line-spectra are able to be effectively extracted.
出处 《科技导报》 CAS CSCD 北大核心 2013年第11期56-59,共4页 Science & Technology Review
基金 国家海洋公益性行业科研专项经费项目(20100500106) 中国科学院国防科技创新基金项目
关键词 辐射噪声 线谱 ALE算法 宽带噪声 radiated noise line-spectrum ALE algorithm broadband noise
  • 相关文献

参考文献9

二级参考文献32

  • 1杨向锋,张效民,孙继红.舰船辐射噪声功率谱特征提取方法研究[J].鱼雷技术,2006,14(1):35-38. 被引量:14
  • 2王庆福,杜栓平.目标辐射噪声中线谱序列的提取方法[J].应用声学,2006,25(6):364-369. 被引量:13
  • 3McDonough R N, Whalen A D. Detection of signals in noise. 2nd Ed. Academic Press, USA, 1995.
  • 4Urick R J. Principles of underwater sound. 3rd Ed. McGraw Hill, USA, 1983.
  • 5Ross D. Mechanics of underwater noise. Pergmon Press, NY, 1976.
  • 6Burenkov S V et al. Heard Island feasibility test: longrange sound transmission from Heard Island to Krylov underwater mountain. J. Acoust. Soc. Am., 1994; 96(4): 2458-2463.
  • 7Worcester P F, Spindel R C. North Pacific acoustic laboratory, http://www.apl.washington.edu.
  • 8李启虎.数字式声呐设计原理.安徽:安徽教育出版社,2003.
  • 9李启虎.用于拖曳式线列阵的一种新的线谱增强系统[J].声学学报,1998,13(3):167-173.
  • 10Jane's Underwater Warfare Systems[J]. 2010-2011.

共引文献75

同被引文献20

引证文献4

二级引证文献5

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部