脉冲雷达干扰高度表的计算机仿真研究

介绍了高度表工作原理,分析了高度表的信号和数据处理过程.为了研究脉冲雷达对高度表的干扰机理,建立了高度表在正常工作和雷达干扰情况下的仿真模型,并对这两种情况进行了仿真.仿真结果表明,脉冲雷达的干扰信号可以使高度表的计数产生很大的误差,在高度较低时,高度表读数变大;在高度较高时,高度表读数变小.最后结合仿真结果,找出了干扰产生的原因:干扰使信号波形上出现了许多窄脉冲,从而使高度表读数变化.

Simulation on interference of pulse radar to altimeter

The work principle of altimeter is introduced,and the signal and data processing of altimeter are analyzed.In order to study the interference principle of pulse radar to altimeter,the simulation model of altimeter in normal and interference circumstance are set up,and the simulation programme is performed.The simulation shows that interference signal of pulse radar can change the reading of altimeter,concretely,the reading get lager when the altitude is higher and getting smaller when the altitude is lower.In the end,the main reason of interference is deduced.Conclusion could be made that narrow pulse occur on the signal waveform for interference triggers the change of altimeter reading.