不同体制雷达间相互干扰研究

Study on interference between different system radars

高度表是一种收发分离的小型雷达。介绍了高度表的工作原理,分析了高度表的信号和数据处理过程。进行了脉冲雷达对高度表的干扰实验,验证了不同体制雷达之间的干扰,测出了高度表对脉冲雷达的敏感度。实验表明,高度表受到脉冲雷达干扰时,高度表的读数误差增大,且随着雷达干扰信号强度的增加而增大。在实验的基础上,根据高度表的信号数据处理方法,分析了干扰产生的原因是平衡检波器输出信号波形上出现了许多尖脉冲,这些尖脉冲使高度表误差增大。

Altimeter is a kind of radar whose transmit antenna and receive antenna are separated. The work principle of altimeter is introduced, and the signal and data processing of ahimeter are analyzed. The interference experiment of pulse radar to altimeter is done, the interference between different system radars is verified, and the altimeter＇s sensitivity for pulse radar is measured. The experiment shows that interference signal of pulse radar can change the reading of altimeter, and the altimeter＇s error increases as the interference intensity does. Based on the experiment, the interference reason is analyzed according to the principle of signal and data processing of altimeter. The reason of altimeter reading change is that many of narrow pulses occur on the resultant signal of balanced detector.