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提出了一种可在单次回波内同时完成方位和时延估计的高分辨新方法，它采用于空间旋转不变法（ＥＳＰＭＴ方法）的思路构造两个子阵，通过对其自相关矩阵和互相关矩阵的广义特征分解，用特征值估计多目标方位，用特征向量估计多目标时延，利用特征值和特征矢量的对应关系自动实现方位和时延参数的配对．计算机仿真结果表明，该方法的分辨能力、估计精度和正确配对概率都优于常规方法，较好地实现了水下多目标距离和方位的同时估计及配对，进而可对多目标进行定位．
A new high resolution method is proposed to estimate azimuth and time delay simultaneously in a single echo. It uses the idea of Spatial Rotation Invariant Method (ESPMT method) to construct two subarrays. The autocorrelation matrix and cross correlation The generalized eigenvalue decomposition of the matrix is used to estimate the multi-target position using the eigenvalue. The multi-objective delay is estimated by using the eigenvector, and the pairing of the azimuth and delay parameters is automatically achieved by using the corresponding relationship between the eigenvalue and the eigenvector. Computer simulation results show that this method is superior to the conventional method in resolving power, estimating accuracy and correct matching probability, and it can realize the simultaneous estimation and pairing of underwater multi-target distance and azimuth, so as to locate multiple targets.