摘要
应答着陆系统(简称TLS)采用相位干涉测角原理,由于要适用于野战环境,其多径效应的抑制显得非常重要;当多径信号不止一路或者与直达信号在角度上接近的话,传统的TLS多径抑制方法效果将变得很差;对TLS的天线阵元进行了重新分配后设计应用了一种新的测角算法———空间平滑MUSIC算法,仿真结果显示现有的TLS天线结构完全可以很好地运用这一算法,在多径环境下测角精度高,并且在结合基本先验知识后能完成多径信号的有效分辨。
Transponder Landing System （TLS） adopts phase interferometer principle. Suppression of multipath effect is very important due to its filed environment. Traditonal multipath effect suppression method becomes bad performed when there are couples of multipath singnals or multipart signal is quite close to direct signal in angle. A new angle measurement algorithm-- spatial smoothing MUSIC algorithm is designed and applied in this paper after arrays reassignment. Simulation results show that this algorithm can be well applied on current TLS antenna configuration, has high accuracy, and can distinguish mulitipath signal and direct signal in accordance with some pre--knowledge.
出处
《计算机测量与控制》
北大核心
2013年第5期1171-1173,1177,共4页
Computer Measurement &Control
基金
基金项目:应答着陆系统需求论证及关键技术分析(DG100107)
关键词
应答着陆系统
多径效应
空间平滑MUSIC算法
transponder landing systems muhipath effect
spatial smoothing MUSIC algorithm
