CAJ | 학술논문

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。
성구차표층탐측뢰체일반채용우겁자천선，유우우겁자천선파속교관，뢰체동시접수도래자성하점화비성하점적회파，우기시차표층회파회화표면비성하점회파동시도체，대획취차표층회파조성곤난，인차유필요개전표면비성하점잡파억제방면적연구。수선침대성재쌍천선계통，상세분석료쌍천선잡파억제적원리，수후제출료채용체귀자괄응려파（RLS）산법적쌍천선잡파억제방법，최후，통과방진대 RLS잡파억제방법급기성능진행료험증。근거방진결과분석，해방법취득료교호적성능，가이유효지응용우성구차표층탐측계통。
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.