一种水下未知固定深度的被动目标运动分析

Underwater passive TAM at unknown constant depth

本文对水下三维情形的被动目标运动分析（ＴＭＡ）进行了探讨．文中使用的数据量测是关于 目标的方位角、俯仰角和多卜勒频移等，且运动目标与观测平台相对深度固定未知．这是水下一种常 见的三维情况．伪线性估计和最大似然估计方法的处理结果表明：由于增大了观测的信息量，运动参 数的估计方差收敛性较好，估计性能得到有效改善．伪线性方法的方差估计曲线向ＣＲＢ界逼近．最 后该方法也适合于分析已知固定深度的三维情形与同处一个水平面的二维情形等特殊情况．

The problem of underwater passive target motion analysis(TMA) is studied in three dimensions when the objector and ownership move on two different horizontal planes in constant unknown depth. This is a general three underwater case. Data of az imuths, elevation and Doppler measurement are used in the paper. The analysis results of PLE (pseudo-linear estimation) and MLE(maximum likelihood estimation) demonstrate that both methods are effective to TMA on using information from three mention as- pects. It can be promoted to the case of known depth TMA and of two states in one of plane of them.