卫星系统的干扰监测技术

对卫星测控系统的上行链路实施干扰会导致整个系统的瘫痪,而干扰下行链路只影响干扰区域内的卫星通信,因此监视卫星上行链路受到的干扰具有重要的意义。简单介绍了卫星系统的构成及其技术特征以及干扰信号的类型及其特点,并在此基础上,根据地面站的接收信息监视卫星系统上行链路可能受到的干扰,提出了利用误码率监测、螺流检测、频谱监视和AGC电平监测等手段监测卫星系统受到的干扰。误码率由于具有定义准确、便于测量及判断门限明确等优点,因此可以将误码率作为主要的干扰监测参数。卫星系统的干扰监测技术可以为系统的抗干扰技术提供一定的参考和支持。

Jamming Monitoring Technology for Satellite System

The jamming against the satellite TT&C uplink will put the whole satellite system out of action,while the jamming against the downlink will only influence a segment of the total satellite communication coverage region,so it is important to monitor the jamming of the satellite TT&C uplink.The construction and technical characteristics of satellite system and the types and characteristics of jamming signals are introduced in brief.Based on these,the type of the uplink jamming can be discriminated according to the received information of the ground station.Several jamming monitor methods for the satellite system are put forward,such as the monitor of bit error rate,helix inspection,monitor of signal spectrum and AGC level etc.With accurate definition,easy measurement and exact judgement threshold,the bit error rate may be adopted as the main parameter of jamming monitor.The jamming monitoring technology of satellite system will provide some foundations for the development of the anti-jamming system.Moreover,it also will provide some effective thoughts for the development of the jamming system against the satellite TT&C channel.