主/旁瓣干扰对单脉冲测角的影响分析

存在干扰的情况下,采用自适应阵列信号处理可以有效地抑制干扰.在对单脉冲特性曲线的影响因素进行分析的基础上,研究了基于单脉冲比的最大似然法角度估计算法及干扰情况下的单脉冲测角技术,对线性约束最小方差单脉冲算法进行了仿真分析,仿真过程中采用泰勒加权以降低和波束旁瓣.结果表明,将主瓣内的干扰置零,会导致和差波束的畸变.和差波束的畸变导致在单脉冲特性曲线中出现奇异值,奇异值将导致在一个检测单元内的角度估计模糊.

Analysis on the Effect of Main/Side Lobe Jamming on Monopulse Angle Estimate

Adaptive array signal processing can suppress interference effectively.Maximum likelihood algorithm based on monopulse ratio and angle estimate when jamming was proposed.Linearly constrained minimum variance（LCMV） monopulse method was simulated and the Taylor weight was proposed in this simulation.The results show that the sum/difference beam would be distorted when mainlobe jamming was formed null.Odd value would appear as the result of the distortion of sum beam,which would result in angle estimate fuzzy in one detection cell.