有源声呐中的改进加权自适应高分辨距离估计方法  

A modified weighted high-resolution adaptive range estimation method for active sonar

作　　者：张舒皓 马晓川[1,2] 王磊 宋其岩[1,2] 詹飞 ZHANG Shuhao;MA Xiaochuan;WANG Lei;SONG Qiyan;ZHAN Fei(Institute of Acoustics,Chinese Academy of Sciences Beijing 100190;University of Chinese,Academy of Sciences Beijing 100049)

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《声学学报》2021年第5期653-663,共11页Acta Acustica

基　　金：国家自然科学基金项目(62071460)资助。

摘　　要：为提高有源声呐对目标回波亮点的距离分辨能力,提出了一种改进加权自适应高分辨距离估计方法,所提方法功率谱中的权值矩阵可采用3种形式:第1个元素为残差平方和其余为0的对角阵、单位阵、残差平方和构成对角阵,采用不同参考子带高阶线性预测的调和平均构造功率谱表达式,避免了距离维自适应方法功率谱中的低阶线性预测。通过数值仿真和水池试验对所提方法与距离维自适应方法进行了比较研究,结果表明所提方法在接近的计算量下获得较优的距离分辨能力。To improve the range resolution capability of active sonar to the target echo highlight,based on range-dimensional bearnforming method a modified weighted adaptive high-resolution range estimation method is proposed.We give three types of weight matrix.The first type of weight matrix is a diagonal matrix whose first diagonal element is the residual and the rest are zero.The second type of weight matrix is the identity matrix.The third type of matrix is the diagonal matrix of residuals.Use high-order linear prediction model with different reference sub-bands to construct power spectrum expression.The proposed method avoids the low-order linear prediction model in range-dimensional beamforming method.Compare the proposed method with the range-dimensional bearnforming method through numerical simulation and tank test.The results show that the proposed method obtains better range resolution under almost the same amount of calculation.

关 键 词：线性预测 距离估计 距离分辨 功率谱 残差平方和 自适应方法 对角阵 调和平均 

分 类 号：TB565[交通运输工程—水声工程]