基于高度分集技术的低仰角测高影响因素分析

Analysis of Factors Influencing on Low-Elevation Height-Measurement Accuracy by Using Height Diversity Technique

米波三坐标雷达有重要的军事价值,尽管目前有很多种测高技术包括高分辨技术、空间谱估计技术、复角技术、偏差补偿技术、频率捷变技术等,但其低仰角测高精度不高,因此有必要分析影响测高因素。本文利用高度分集测高技术,仿真分析了不同介质以及极化方式对反射系数的影响;信噪比,幅相特性不一致对测高精度的影响。

3D meter-wave radar has important value in military field, although multiple height-measurement techniques are available, such as high-resolution technique, space spectrum estimation, complex angle technique, deviation compensation and frequency agility, their height measurement accuracy at low-elevation is not high enough, therefore it is necessary to analyze factors which affect height measurement accuracy. By using height diversity technique, simulation and analysis conducted include impact of different medium and polarization on reflection coefficient, and signal to noise ratio （SNR） and inconsistency of amplitude and phase characteristics on height measure- ment accuracy.