摘要
针对全球定位系统(GPS)接收机在强宽带干扰下无法正常工作的情况,采用自适应调零天线,利用信号和干扰的入射空间角度不同进行空域滤波,可提高其抗干扰能力。理论分析和仿真结果表明,基于线性约束最小方差(LCMV)准则的自适应滤波算法简单有效,在牺牲一个干扰抑制自由度的条件下,可对高仰角卫星导航信号进行较好的保护。
Global Positioning System （GPS） receiver fails when existing strong broad band interference. As the angles of arriving were different between the signal and interference, a spatial algorithm for improving the anti-jamming ability of GPS receiver by using adaptive nulling antenna was proposed. Theoretical analyses and simulation results demonstrate that the adaptive filtering method based on the Linearly Constrained Minimum Variance （LCMV） principle is effective and easy to realize. The method can protect the signal of the navigation satellite with high elevation at a price of losing an anti-jamming freedom.
出处
《计算机应用》
CSCD
北大核心
2014年第A02期354-356,共3页
journal of Computer Applications
关键词
自适应调零天线
空域滤波
抗干扰
线性约束最小方差
adaptive nulling antenna
spatial filtering
anti-interference
Linearly Constrained Minimum Variance（LCMV）
