摘要
机场电磁环境的恶化严重影响到飞机着陆引导安全,机场周边的建筑物对着陆导航信号构成的多径效应严重干扰了飞机仪表正常显示。通过对着陆导航电磁环境的评估,能够对机场周边的干扰源进行确定,以及干扰程度的量化分析。采用自适应滤波理论,提出了一种可变抽头数目,非均匀抽头延迟的自适应算法,能够准确跟踪和估计多个多径信号的延迟,计算机仿真结果表明了该方法的有效性。
The wicked electromagnetic environment of airport threatens the landing security of planes, and the multi-path effect, which resulted from the buildings around the airport, disturbs the instrument display on the airplane. By the evaluation of the electromagnetic environment of airport, the location of interfere resource can be determined, and the interfering degree can also be analysis. Based on the adaptive filtering theory, an adaptive algorithm, using variable taps number and uneven tap delay, is proposed, and multi-path delay is tracked and estimated. The computer simulation is used to validate the method.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第6期1464-1467,共4页
Computer Engineering and Design
基金
国家863高技术研究发展计划基金项目(2006AA704302)
关键词
多径时延
信道估计
着陆导航系统
自适应滤波
可变抽头
multipath time delay
channel estimation
landing navigation system
adaptive filtering
variable taps
