摘要
研究星载双天线优化问题,针对更好地提取地下分层结构的回波,星载射频回波探测仪RES(Radio Echo Sounder)在行星内部结构探测。为了对表面杂波进行抑制,利用双天线抑制月球表面杂波的数学模型。对于星载RES系统,接收信号包括表面杂波和地下分层结构产生的回波。对杂波要进行有效地抑制。根据ESA火星快车MARSIS高频雷达系统中使用的双天线技术进行仿真。数值计算表明采用双天线杂波抑制法可以显著提高回波的信杂比,可以应用到月球探测中。
Spaceborne Radio Echo Sounder（RES） is a promising opportunity to investigate planets subsurface.Geological feature of subsurface layers was essential to understand the origin and evolution process of planets.For spaceborne RES,the return signal was the sum of the surface clutter and subsurface reflected signal.How to reduce the surface clutter was a hot issue in RES technology field.The ESA＇s Mars Expess Mission carried a spaceborne radar sounder called MARSIS and applied the dual-antenna method.This paper deduced the mathematical formulation of dual-antenna clutter cancellation.Numerical simulation results show that the signal to clutter ratio is effectively improved and this method can be used in Moon exploration.
出处
《计算机仿真》
CSCD
北大核心
2011年第10期39-42,47,共5页
Computer Simulation
基金
国家自然基金项目(40976114)
国家863项目(2008AA121702-3)
关键词
射频回波探测仪
杂波抑制
双天线
Radio echo sounder（RES）
Clutter cancellation
Dual-antenna
