基于ESPRIT算法的超宽带SAR射频干扰抑制方法  

Research of ESPRIT Algorithm in UWB-SAR RFI Suppression

作　　者：聂鑫[1] 雷万明[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《信息化研究》2012年第2期30-33,62,共5页INFORMATIZATION RESEARCH

摘　　要：有效的射频干扰(Radio frequency interference,RFI)抑制技术是超宽带合成孔径雷达(Ul-tra-wideband synthetic aperture radar,UWB-SAR)成像质量的重要保证。通过对超宽带回波信号的特性分析,得出RFI具有短时间内平稳的特性,这样便可借助谱估计方法对其进行估计。旋转不变技术估计信号参数方法(Estimation of signal parameters via rotational invariance techniques,ESPRIT)是谱估计中一种频率估计性能较好、运算量较小的方法,文章对该算法在UWB-SAR RFI抑制中的应用进行了研究分析,并通过仿真实验表明该算法对RFI具有良好的抑制性能。Radio frequency Interference（RFI） suppression is a key technique in the ultra-wideband synthetic aperture radar（UWB-SAR）.This paper firstly analyses the sources and the properties of RFI signal.Since RFI signal is stationary during a short period,the RFI estimation problem could be solved by utilizing the spectrum estimation technique.Estimation of Signal Parameters via Rotational Invariance Techniques（ESPRIT） is an algorithm which is well developed for frequency estimation and it is quite efficient.The application of ESPRIT in RFI suppression is investigated in this paper,and several key points are discussed and analyzed.Finally,the algorithm is validated having good performance in suppressing RFI signal via the simulation.

关 键 词：超宽带 合成孔径雷达 射频干扰抑制 旋转不变技术估计信号参数方法(ESPRIT) 

分 类 号：TN957[电子电信—信号与信息处理]