基于非均匀采样序列频率拟合的宽带捷变信号测向  

Direction Finding of Wideband Agile Signal Based on Frequency Fitting of Nonuniform Sampling Sequence

作　　者：蒋景飞 顾杰 车延庭 刘国 JIANG Jingfei;GU Jie;CHE Yanting;LIU Guo(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,China;National Key Laboratory of Electromagnetic Space Security,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司第二十九研究所,成都610036 [2]电磁空间安全全国重点实验室,成都610036

出　　处：《电子信息对抗技术》2023年第3期19-23,共5页Electronic Information Warfare Technology

摘　　要：在复时间序列非均匀采样的框架下,对宽带频率捷变信号的阵列响应进行了统一描述,将宽带捷变信号的测向问题转变成对非均匀采样复“时间”序列的“频率”估计问题。通过非均匀采样频率拟合实现了宽带信号级融合精确测向,并利用与通道相位噪声相关的加权,进一步提高了非均匀拟合的测向精度与对相位误差的鲁棒性。与传统干涉仪算法的测向精度仿真对比证实了本文算法的优越性。The array response of wideband frequency agile signals is described under the framework of irregularly complex sequence sampling.In this way,direction finding problem of wideband agile signals can be expressed as a frequency estimation problem.By means of fitting the frequency of the irregularly sampled sequence,a wideband frequency agile signals direction finding algorithm is presented.The accuracy and robustness of the presented algorithm are further enhanced by a weighted fitting process.The effectiveness of the presented algorithm is verified via numerical simulations comparing to its traditional interferometer counterpart.

关 键 词：入射方向估计 宽带测向 频率捷变信号 加权拟合 

分 类 号：TN971[电子电信—信号与信息处理]