时差定位原理及其应用

Principle and Application of TDOA

首先介绍干涉仪测向基本原理及其在宽带信号测向方面的局限,然后介绍TDOA定位原理以及关键技术,最后提出其在无线电监测方面的应用及其优点。在无线电通信领域中,通常采用“比幅法”和“比相法”2种方法,但“比幅法”存在更多问题,很少使用。近期流行“比相法”中的干涉仪体制,可获得较高的定位精度,但也存在一些问题,如:怎样工作在宽频带等。

In this paper,we first introduce the principle of interferometer and its limitations on direction finding at the broadband,and then discuss the principle of TDOA location and its key techniques. Finally, we propose the application and advantages of TDOA in the radio surveillance system. In the domain of radio location, two methods are generally used, i. e. the amplitude comparison method and the phase comparison method. But at present, the amplitude comparison method is not used usually because of many problems occurring in its previous applications. Using the interferometer system in the phase comparison method appearing currently can obtain high location precision, but it also has some problems such as how to work at the broadband, its equipment is more complicated, etc. Therefore, we study and develop the TDOA system.