基于多散射中心对齐的距离像抽取方法  

Range Profile Stitching of Moving Target Based on Multiple Scattering Center Alignment

作　　者：刘开元[1] 周剑雄[1] 朱永锋[1] 付强[1] 

机构地区：[1]国防科技大学ATR重点实验室,湖南长沙410073

出　　处：《雷达科学与技术》2013年第5期531-536,共6页Radar Science and Technology

摘　　要：分析了频率步进雷达照射下,运动目标多个散射中心在中分辨-高分辨二维平面上的分布特性,并提出了基于多散射中心对齐的一维距离像抽取方法。该方法用通过频域线性相位乘因子实现中分辨维的精确移位和多散射中心对齐,在移位后的中分辨-高分辨平面通过抽取若干条等距的平行线得到目标的一维距离像。该方法物理意义清晰,抽取的距离像具有目标能量损失小、位置参考点恒定的特点,能充分反映运动目标的散射特性和运动特性。并采用仿真数据验证了方法的有效性。This paper analyzes the linear distribution of multiple scattering centers of a moving target in the mid-high resolution array of a stepped frequency radar.Based on this character,a range profile pick-up algorithm using multiple scatter center alignment is proposed.This algorithm accurately aligns all the scattering centers in the mid-resolution dimension by a linear phase shift in the frequency domain,and chooses several parallel lines to stitch the whole range profile.The physical significance of this algorithm is clear and the HRRP obtained from this algorithm has several advantages such as slight loss of target energy and fixed reference position,which leads to adequate reflection of the target＇s scattering character and moving character.The simulation results validate the effectiveness of this algorithm.

关 键 词：频率步进 扩展目标 抽取 一维距离像 散射中心对齐 

分 类 号：TN957[电子电信—信号与信息处理]