摘要
自适应单脉冲方法是干扰背景下目标角度估计的一种有效方法。但对于主瓣内明显偏离波束中心的目标,或者在实际应用中由于天线往往采用子阵结构且存在误差,自适应单脉冲方法估计结果会出现较大的测角偏差。为解决这两个问题,提出一种基于鉴角曲线拟合的自适应单脉冲测角方法。该方法首先利用自适应和差权矢量与实测导向矢量计算出对应角度的单脉冲比;然后采用最小二乘法拟合出自适应鉴角曲线;最后通过自适应鉴角曲线估计出目标角度。仿真实验验证了该方法的有效性。
The adaptive monopulse method is efficient for angle estimation in an interference background.However,when the target departs from the antenna look direction apparently or this method is applied to the subarray-configuration array with the array error,it produces a large bias.To overcome these problems,a novel method is developed.Firstly,the monopulse ratio is calculated from the adaptive sum and difference weight vectors and the measured steering vectors.Secondly,the monopulse response curve is fitted by the least square algorithm.Finally,the target angle is estimated through the curve.The simulation results show the validity of the developed method.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2013年第7期1403-1408,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(61101241)
中央高校基本科研业务费专项资金(K50511020008)资助课题
关键词
单脉冲测角
自适应波束形成
鉴角曲线
monopulse estimation
adaptive beamforming
monopulse response curve
