应答着陆系统目标角度估计与识别

Transponder Landing System Target Angle Estimation and Identification

针对应答着陆系统(transponder landing system,TLS)在复杂地形下对进场飞机辨别困难的问题,提出一种基于相对能量大小的目标识别方法。采用S模式的回答信号来代替原始的3/A模式回答信号,利用基于MUSIC算法的空间平滑技术实现高相关多目标信号的方向估计,采用重构阵列流形的方式,通过能量最大匹配原理进行目标角度的正确识别,并进行仿真分析。仿真结果表明:该识别技术稳定性较好,在较低信噪比条件下基本能够准确地进行飞机角度估计和识别,达到了系统方位角度测量的精度要求。

To the multi-path and signal correlation issues in the aircraft landing course, the study designed a new non-uniform linear receiving antenna array, introducing the spatial smoothing technique based on MUSIC algorithm to replace the traditional phase interferometer angle measurement of Transponder Landing System （TLS）. Based on the relative energy size, presented a target identification method which solved the problem of aircraft target identification in multi-path conditions. According to the computer simulation, the study analyzed the success probability and precision of target angle estimation and identification under the new algorithm based on the designed array, effectively validated the feasibility of the designed array and proposed identification technique.