基于三阶泰勒展开的自适应单脉冲测角方法  

Monopulse Angle Estimation with Adaptive Array Based on the Third-order Taylor Series

作　　者：陈成增[1] 王彤[2] 吴建新[2] 

机构地区：[1]北京无线电测量研究所,北京100854 [2]西安电子科技大学电子工程学院,西安710071

出　　处：《现代雷达》2013年第8期32-36,58,共6页Modern Radar

基　　金：国家自然科学基金项目(61101241);中央高校基本科研业务费专项资金资助(K50511020008)

摘　　要：单脉冲方法是雷达中广泛使用的目标角度精确测量方法,自适应和单脉冲技术的结合大大提高了雷达对干扰环境的适应能力。但是,主瓣内明显偏离波束中心的目标,自适应单脉冲方法会出现较大的测角偏差。为解决上述问题,文中提出采用自适应单脉冲比三阶泰勒展开式进行目标角度估计的方法。该方法首先对自适应单脉冲比在波束中心进行三阶泰勒级数展开,然后利用多项式求根公式估计出目标角度。计算机仿真实验验证了该方法可以有效扩展目标角度精确测量范围。The monopulse estimation is widely used in radar for target angle estimation.. The accuracy of target angle estimation of radar is improved in the presence of interference by combining adaptive array technical with monopulse estimation technical. However in this technique, it yields a large bias for the target visibly departing from the antenna look direction. To overcome this problem, an adaptive monopulse angle estimation is developed. The presented method evaluates the monopulse ratio by the third-order Taylor series on the antenna look direction, and obtains the target angle employing real polynomial rooting. The proposed method, which expands the range of accurate angle estimation, is validated by the simulation results.

关 键 词：单脉冲测角 自适应波束形成 泰勒级数 

分 类 号：TN98[电子电信—信息与通信工程]