卫星测控射频链路安全防护能力分析与设计

Analysis and Design of Security Protection Capability of Satellite TT&C RF Link

针对当前卫星测控射频链路面临的安全威胁,文章分析了不同测控体制的抗干扰能力,提出一种兼容直扩/扩跳频等多种体制的测控系统方案,采用多体制融合设计及基于窗函数的频域抗干扰算法,并在射频接收通道增加限幅器设计,在某遥感卫星的测控系统中应用,经过工程试验表明:此测控系统方案具备较高抗干扰能力和抗毁伤能力,可为其他有高抗干扰能力需求的卫星测控系统设计提供借鉴。

In view of the security threat faced by the current satellite TT&C RF link,the paper analyzes the anti-jamming ability of different TT&C systems,and puts forward a TT&C system scheme design compatible with various systems such as direct sequence/direct sequence+frequency hopping(DS/DS+FH).The system adopts multi system fusion design and frequency domain anti-jamming algorithm based on window function,and a limiter is added to the RF receiving channel.The TT&C system scheme is applied in a remote sensing satellite.The engineering test shows that the system scheme has high anti-jamming and anti-damage ability.It can be used as a reference for the design of satellite TT&C system with high anti-jamming ability.