UHF波段无源雷达低仰角波瓣分裂现象分析及校正方法  

Analysis and correction methed of low-elevation lobe split in UHF band passive radar

作　　者：蒋柏峰[1] 鄢宏华[1] JIANG Baifeng;YAN Honghua(China Academy of Electronics and Information Technology,Beijing 100041,China)

机构地区：[1]中国电子科学研究院,北京100041

出　　处：《空天预警研究学报》2024年第3期173-177,共5页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

摘　　要：针对低频段无源雷达低仰角远程预警探测时波瓣分裂影响俯仰向探测空域覆盖的问题,提出了一种波瓣分裂校正方法.首先分析了波瓣分裂形成原因和影响因素;然后基于阵列流型拟合思想,提出了一种利用最小二乘法求解变换矩阵的校正方法;最后通过仿真分析了角度量化间隔、角度变换区间对校正误差的影响,验证了校正方法的有效性.这对改进基于数字广播电视信号的无源雷达性能提供了参考.Aiming at the problem of lobe split affecting the elevation detection airspace coverage when low-band passive radar performs long-range early-warning detection in the case of low elevation,this paper first analyzes the forming causes and influencing factors of lobe split,then based on the idea of array flow pattern fitting,proposes a method of solving the correction transformation matrix using least square method,and finally,conducts simulation to analyze the effect of angle quantization interval and angle transform interval on the correction error,verifying the validity of the correction method.This provides a reference for improving the performance of passive radar based on digital broadcast television signals.

关 键 词：无源雷达 波瓣分裂 最小二乘法 多径信号 波束形成 

分 类 号：TN958.97[电子电信—信号与信息处理]