摘要
相位编码信号由于其脉冲间码型捷变、图钉状模糊函数和不存在距离-多普勒模糊等低截获性能,在当前雷达对抗领域获得广泛的关注和应用。由于目标运动会使相位编码回波受到多普勒频率调制,破坏了各个调相码之间的相位关系,相关处理会出现失配现象,输出主瓣降低,旁瓣升高,系统在探测高速目标会出现多普勒失配。根据m序列码脉冲压缩随着目标速度的失配变化和目标多普勒容限关系,本论文研究了较为实用的二次曲线拟合局部脉冲压缩曲线。根据三点多普勒补偿的脉压结果实现全局最优补偿的自动估算。所提算法具有简单的实现过程,易于工程实现。
The phase coded signal causes widely attention and is applied in current radar antijamming field since its code pattern agility among pulses, thumbtack ambiguity funcion and inexisistence of LPI capabilities like range and Doppler ambiguity. Doppler mismatch may occur when the system is detecting high speed targets since phase coded echo may be modulated by Doppler frequency owing to target movement; this will damage phase relation among phase modulating codes, and the related processing will occur mismatch phenomenon,and the output main lobe is low, and side lobe upscending. More practical applied conic fitting partial pulse compression curve is studied ac-cording to m sequence code pulse compression changes as mismatch of target speed and target Doppler tolerance re-lation. The automatic estimation of global optimal compensation is implemented according to pulse compression re-sult of 3-point Doppler compensation. The proposed algorithm is featured with simple implementation process and easily realization in engineering.
出处
《火控雷达技术》
2015年第2期5-8,21,共5页
Fire Control Radar Technology
基金
国家自然科学基金项目(61403304)
陕西省教育厅科研计划项目(14JK1511)
西安市科技计划项目(CXY1439(5))
