用正交投影技术抑制GPS信号中的AM-FM干扰

The Mitigation of AM-FM Jamming Using or Thogonal Projection in GPS Receivers

首先给出了 GPS 系统的信号模型,然后详细分析了在 GPS 信号中抑制 AM—FM 干扰的原理.并对其进行了数字仿真,结果表明当不存在估计误差时正交投影技术可以有效的抑制 GPS 接收信号中的 AM—FM 干扰信号,它的输出 SINR 接近于理论值;存在估计误差时,进行了定性的仿真分析,结果表明会对投影技术的性能造成一定的影响。

Firstly,signal model of GPS system is introduced,and then the basic principle of the suppressing AM-FMjamming in GPS receivers is detailedly analyzed and simulated,which proves that orthogonal projection techniques with-out estimation error can effectively excis AM-FM jamming in GPS receivers. and that the output SINR is very close to the theoretical results. The qualitative simulation with estimation error is carried out. which indicates that it has a little effect on the performance of orhhogonal projection techniques.