功率倒置自适应阵抗干扰特性研究

采用功率倒置算法的自适应天线系统特别适合于卫星导航系统等信号很弱而干扰较强的场合.在有干扰信号的时候,只有当干扰信号功率大到一定程度之后功率倒置阵才对其有抑制效果.为了指导设计满足卫星导航接收机抗干扰应用的功率倒置阵系统,对功率倒置阵的抗干扰特性进了详细的理论分析与实验研究.理论分析的结果表明,通过合理地选择环路增益可以调整功率倒置阵的稳态性能,使其满足卫星导航接收机的抗干扰要求.对功率倒置阵系统的实验测试也验证了理论分析的正确性,同时也证明了所设计的功率倒置阵系统具有良好的抗干扰性能,具有很好实用价值.

Study on Anti-jamming Characteristic of Power-Inversion Adaptive Array

The power-inversion adaptive array is very suitable for satellite navigation system, because the desired signals are usually very weak while the jamming signals are much stronger. The power-inversion adaptive array works only when the jamming intensity exceeds a threshold, which is determined by the loop gain of the system. To guide the design work of the power-inversion adaptive array for satellite navigation receivers, the anti-jamming characteristics are analyzed and studied. The results indicate that it satisfy the requirements by choosing a suitable loop gain value. The experiment results also validate the anti-jamming performance of the adaptive array, and demonstrate the practicality of the practical system.