一种基于单水听器宽带信号自相关函数的水下目标定位稳健方法  被引量:7

A robust localization method for source localization based on the auto-correlation function of wide-band signal

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作  者:张同伟[1,2] 杨坤德[2] 马远良[2] 汪勇[2] 

机构地区:[1]国家深海基地管理中心,青岛266061 [2]西北工业大学航海学院,西安710072

出  处:《物理学报》2015年第2期276-282,共7页Acta Physica Sinica

基  金:国家自然科学基金(批准号:10774119;11174235;41330965);教育部新世纪优秀人才支持计划(批准号:NCET-08-0455);陕西省自然科学基础研究计划(批准号:SJ08F07);声场声信息国家重点实验室基金资助的课题~~

摘  要:在浅海波导中,未知声源的本征声线相对到达时延估计是非常困难的.声源位置在邻域内变化和声速剖面扰动对本征声线相对达到时延的影响是类似的.基于这种思想,提出了基于单水听器宽带信号自相关函数的水下目标定位稳健方法.通过设计邻域位置约束,构造加权函数,将宽带信号自相关函数包含的交叉干扰峰值转化为能够改善目标定位性能的有用信息.该方法不仅不需要估计本征声线的相对到达时延,而且对搜索网格失配和环境参数失配具有相当的宽容性.利用典型浅海环境下的仿真数据和海上实验数据(Shallow Water 2006 experiments)对所提出方法的有效性进行了验证.It is very di?cult to estimate the relative arrival delay of the eigenrays for an unknown source in shallow water. The effects of a source position changing in the neighborhood and sound speed profile perturbation on arrival time of eigenvays are similar. In this paper, we present a robust localization method based on the auto-correlation function of wide-band signal of single hydrophone. By designing neighboring location constraints, a weighting function is constructed to change the peak cross-interference of the auto-correlation function to useful information that is conducible to the improving of targeting performance. In this method there is no need to estimate the relative arrival delay of the eigenray. Computer simulation shows that the robust method can achieve better localization performance, and even has tolerences of environment mismatch and searching grid mismatch. The performance of the robust method is validated through the broad-band data collected on a vertical line array during the Shallow Water 2006 experiments.

关 键 词:单水听器定位 自相关函数 宽带信号 

分 类 号:TN911.23[电子电信—通信与信息系统]

 

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