星球次表层探测中地杂波抑制技术研究  

Surface Clutter Cancellation in Planet Subsurface Sounder

作　　者：曹志国[1] 常文革[1] 李召阳 向巍 于丹茹 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]毫米波遥感技术重点实验室,北京100854

出　　处：《雷达科学与技术》2013年第6期650-657,662,共9页Radar Science and Technology

摘　　要：星球次表层探测雷达一般采用偶极子天线,由于偶极子天线波束较宽,雷达同时接收到来自星下点和非星下点的回波,尤其是次表层回波会和表面非星下点回波同时到达,对获取次表层回波造成困难,因此有必要开展表面非星下点杂波抑制方面的研究。首先针对星载双天线系统,详细分析了双天线杂波抑制的原理,随后提出了采用递归自适应滤波(RLS)算法的双天线杂波抑制方法,最后,通过仿真对RLS杂波抑制方法及其性能进行了验证。根据仿真结果分析,该方法取得了较好的性能,可以有效地应用于星球次表层探测系统。Planet subsurface sounder usually uses dipole antenna which has large beamwidth. It will re- ceive both nadir and off nadir echoes. It is difficult to extract the subsurface echo when the off nadir echo is very strong, so it is necessary to do research on clutter cancellation. Focused on the space-borne radio sound- er with dual-antenna, the mathematic model is analyzed firstly, and then, a clutter cancellation approach using RLS algorithm is presented, Finally, simulations are carried out to prove the validity of the proposed method, and its performance is also examined. Simulation results show that the approach achieves excellent performance, and can be applied effectively in the planet subsurface sounder.

关 键 词：次表层探测 杂波抑制 自适应滤波 双天线对消 

分 类 号：TN957[电子电信—信号与信息处理] V443.4[电子电信—信息与通信工程]