一种高精度频率估计的抗噪声调幅干扰算法  

An Algorithm Antagonizing Noise AM Jamming of High Accuracy Frequency Estimation

作　　者：闵柏成 张允[1] 王思远[1] 

机构地区：[1]中国船舶重工集团公司第723研究所,扬州225001

出　　处：《舰船电子对抗》2016年第6期87-93,共7页Shipboard Electronic Countermeasure

摘　　要：噪声调幅干扰对消中,干扰频率估计精度较低将导致干扰对消效果严重退化。针对此问题,提出一种基于高精度干扰频率估计的噪声调幅干扰对消方法。该方法首先对Candon算法和Rife算法中谱线的幅值作线性融合处理,然后基于内插离散傅里叶变换,分割离散频谱区域,最后对干扰信号解调并利用频域对消方法抑制干扰。仿真结果表明,该方法具有良好的频率估计性能并能在强干扰背景下有效地抑制噪声调幅干扰。In noise amplitude modulation （AM） jamming elimination,lower accuracy of jamming frequency estimation will result in serious degradation of jamming elimination effect. Aiming at the problem,this paper puts forward a noise AM jamming elimination method based on jamming frequency estimation with high accuracy. The method firstly performs linear fusion processing to the amplitude of spectral line in Candon algorithm and Rife algorithm, then divides the discrete spec- trum region based on interpolated discrete Fourier transform, finally demodulates the jamming signal and uses frequency region elimination method to suppress the jamming. The simulation result shows that the method has favorable frequency estimation performance and can effectively restrain noise AM jamming in strong jamming background.

关 键 词：噪声调幅 频率估计 Rife算法 干扰抑制 

分 类 号：TN974[电子电信—信号与信息处理]