一种新的应答着陆系统测角算法

摘要

应答着陆系统是一种基于应答机的精密进近着陆引导系统,通过询问并接收飞机应答机的应答信号来估计飞机的方位、仰角和距离等信息;文章分析了应答着陆系统传统的测角算法原理、误差来源和影响因素；通过扩大不模糊角度测量的范围,利用虚拟技术实现了系统天线阵列的虚拟均匀排列;提出了基于MUSIC算法的空间平滑技术进行多目标飞机角度估计的设想；通过计算机仿真对新测角算法的估计能力,成功概率以及精度的分析,验证了新算法的可行性和有效性.%Transponder Landing System (TLS) is a transponder based precise approach landing system. It obtains the azimuth, elevation and range information by receiving the transponder reply signal which was interrogated by ground sensors. This article analyzed the principle * error origin and influence factor of the TLS traditional angle measurement algorithm. It extended the un-ambiguity angle measurement range and achieved the virtual uniform antenna arrays through the virtual technique. Based on the S mode reply signal, it carried out an idea to estimate the multi-target aircraft angles by the spatial smoothing technique based on MUSIC algorithm. According to the computer simulation, analyzed the estimation capability, success probability and precision of the proposed angle measurement algorithm. It also verified the feasibility and validity of the new algorithm.