文章摘要
刘清宇,方世良,徐江.谐波信号的闭环检测和估计算法及其应用[J].声学技术,2009,(6):791~794
谐波信号的闭环检测和估计算法及其应用
Closed-loop algorithm for the detection and estimation of harmonic signals and its application
投稿时间:2009-04-03  修订日期:2009-07-22
DOI:
中文关键词: 谐波信号  线谱  检测与估计
英文关键词: harmonic signal  line spectrum  detection and estimation
基金项目:
作者单位E-mail
刘清宇 海军装备研究院, 北京, 100161  
方世良 东南大学信息科学与工程学院, 南京, 211189 slfang@seu.edu.cn 
徐江 海军装备研究院, 北京, 100161  
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中文摘要:
      从联合检测估计的角度讨论了检测器和估计器之间的耦合机制,并就水声目标线谱特征提取问题研究了一种谐波信号的闭环检测和估计算法。该算法通过迭代形式在检测器和估计器之间不断交换信息,用以改善未知参数的先验分布,从而得到较好的检测和估计性能。对海试数据的仿真结果表明,该算法可以有效地提取目标的线谱特征。
英文摘要:
      Coupling mechanism between the detector and estimator is considered from a joint detection and estimation viewpoint.A novel closed-loop algorism is also introduced for the detection and estimation of harmonic signals,which can be applied to measurement of line frequency spectrum for the recognition of underwater acoustic targets.Within the closed-loop scheme,soft information,which is used to refine the a priori information of unknown parameters,could be exchanged between the detector and estimator through iterations in order to achieve an improved performance.Simulations on real data show that this algorism can extract line spectrum feature of targets efficiently.
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