Nuttall窗三谱线插值法在雷达辐射源识别中的应用  

Application of Triple-spectrum-line Interpolation Method of Nuttall Window to Radar Radiation Source Identification

作　　者：李霄[1] 石远东[1] 柴恒[1] LI Xiao;SHI Yuan dong;CHAI Heng(The 723 Institute of CSIC,Yangzhou 225101,China)

机构地区：[1]中国船舶重工集团公司第七二三研究所,江苏扬州225101

出　　处：《舰船电子对抗》2018年第4期57-61,共5页Shipboard Electronic Countermeasure

摘　　要：研究了雷达辐射源谐波特征,针对快速傅里叶变换(FFT)提取谐波特征过程导致的频谱泄漏和扇形损失问题,对比几种常用窗函数的性能,提出了使用四项五阶Nuttall窗函数结合三谱线插值修正的方案,恢复雷达辐射源谐波的幅度特征。最后通过仿真验证了算法的准确性。This paper studies the characteristics of radar radiation source harmonics, aiming at the problem of spectrum leakage and fan shaped loss caused in the process of harmonics characteristic extraction by fast Fourier transform （FFT）,compares the performances of several commonly used window functions,and proposes the scheme using four term fifth derivative Nuttall window func tions combining with the triple spectrum line interpolation amendment to recover the amplitude characteristics of radar radiation source harmonics.Finally,the accuracy of the algorithm is verified through simulation.

关 键 词：辐射源识别 谐波特征 四项五阶Nuttall窗 三谱线差值 

分 类 号：TN971.1[电子电信—信号与信息处理]