方位和差分多普勒联合定位

对辐射源进行无源定位，可以用多个固定站，也可以利用一个移动站来实现。移动站定位就是利用一个运动的传感器，沿着它的运动轨迹，对辐射源进行参数测量，并用这些测量值估计出辐射源的位置。方位测量和频率测量是两种最基本的测量方法，在此基础上，还有各种综合方法。提出了利用方位和多普勒频率差联合测量法来估计辐射源的位置。并用Ｃｒａｍ ｅｒ－Ｒａｏ ｂｏｕｎｄ 对频率测量、多普勒频率差测量、方位和多普勒频率差联合测量三种测量估计方法进行性能比较分析。利用Ｇａｕｓｓ－Ｎｅｗ ｔｏｎ 迭代法计算出辐射源的位置。从计算机模拟可以得出，方位和多普勒频率差联合测量估计是一种有效的，性能好的无源定位方法。

Bearing and Difference of Dopplerized Frequency Combined Measurement for Emitter Location

The position ofastationary em ittercan be estim ated by m ultiplestationary sensors orasinglem oving sensor from passive m easurem ents taken atdifferentpoints along the trajectory. The bearing m easurem entand the frequency m easurem entaretwo fundam entalm ethod from passivem easurem ent, also itcan constructothercom bined m ethod based on them . In the paper a com bined m ethod of m easuring both bearing and difference of Dopplerized frequency shiftis presented. The perform ance ofthose m ethodsare analyzed and com pared in a Cram erRao bound. The com bined m ethod is an efficientm ethod which is confirmed in a com putersim ulation.