多载频相位编码雷达信号自适应脉冲压缩方法  

Adaptive pulse compression of multi-carrier phase-coded radar signals

作　　者：夏阳[1] 宋志勇[1] 卢再奇[1] 付强[1] 

机构地区：[1]国防科学技术大学ATR国防科技重点实验室,湖南长沙410073

出　　处：《系统工程与电子技术》2016年第9期2028-2032,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(61401475)资助课题

摘　　要：多载频相位编码信号(multi-carrier phase-coded,MCPC)作为近年来备受关注的一种宽带雷达信号,具有较高的频谱利用率、良好的自相关以及频率分集特性等优点,因而在目标检测、抗干扰以及高分辨成像等领域具有较大的应用前景。针对MCPC雷达信号常规脉冲压缩易产生高距离旁瓣而导致强目标邻近的弱小目标检测困难问题,通过对MCPC雷达信号进行建模分析并结合其信号特点,提出了一种MCPC雷达信号自适应脉冲压缩算法,通过利用循环迭代获取每个距离单元的最优匹配滤波器,从而有效抑制了距离旁瓣,提高了对邻近距离单元弱小目标的检测能力。仿真实验验证了该方法的有效性,并进一步分析了编码方式对脉冲压缩距离旁瓣的影响。As a kind of wideband radar signal, the multi-carrier phase-coded （MCPC） radar signal attractsmuch attention recently and it is gradually applied to target detection, anti-jamming and high resolution imagingfields for the its high spectrum efficiency？ favorable auto-correlation properties and frequency diversity. For theMCPC radar signal, high range sidelobe is easily produced by using traditional pulse compression, which willbring difficulty to detect weak target adjacent to the strong one. The MCPC radar signal is modeled and analyzed.Combining the characteristics of the MCPC radar signal, an approach of adaptive pulse compression of theMCPC radar signal is proposed, which uses the cyclic iterative algorithm to obtain the optimum match filter ineach range cell. Thus,the range sidelobe is effectively suppressed and the performance of detecting the weaktarget is also improved. Simulation results verify the effective ness of the algorithm. Meanwhile, the influenceof phase code sequence on the performance of sidelobe suppression is also analyzed.

关 键 词：多载频相位编码 弱小目标 自适应脉冲压缩 旁瓣抑制 编码序列 

分 类 号：TN957.5[电子电信—信号与信息处理]