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也许目前在导航设备工作中存在的最大的问题是信号干扰。对导航信号的干扰形式主要有两类:有源干扰和无源干扰。有源干扰源包括广播、工业科学和医疗设备、电力电缆传输系统、电气化铁路和无线电通信设备,而导航台站场地附近的各种金属导线、建筑物和树木以及高低不平的地形是主要的无源干扰源。这两种干扰都将影响导航设备的辐射场型,从而影响导航信号的准确性和可靠性。这里,就如何确定影响航向信号的无源干扰源的位置及减小干扰的方法作一探讨。
Perhaps the biggest problem that currently exists in the operation of navigation equipment is signal interference. There are two main types of interference to navigation signals: active interference and passive interference. Active sources of interference include radio, industrial science and medical equipment, power cable transmission systems, electrified railways and radiocommunication equipment, while the various metal wires, buildings and trees near the navigation station arena and the rugged terrain are the main ones Source of interference. Both of these disturbances will affect the radiated field pattern of the navigation device, thereby affecting the accuracy and reliability of the navigation signal. Here, we discuss how to determine the location of the source of interference affecting the heading signal and how to reduce the interference.