短脉冲信号阵列接收的Keystone变换预处理方法  

Pre-processing Method for Array Received Short Pulse Signal Based on Keystone Transform

作　　者：巴涛[1] 汪海波[1] 张海川 庄俊 戎磊 席麒钧 BA Tao;WANG Haibo;ZHANG Haichuan;ZHUANG Jun;RONG Lei;XI Qijun(Key Laboratory of Advanced Science and Technology on High Power Microwave,Northwest Institute of Nuclear Technology:Xi’an 710024,China)

机构地区：[1]先进高功率微波技术重点实验室,西北核技术研究所,西安710024

出　　处：《现代应用物理》2023年第3期157-162,共6页Modern Applied Physics

基　　金：先进高功率微波技术重点实验室基金资助项目(Z091230811)。

摘　　要：短脉冲信号的能量在时间域上较为集中,当其以一定角度斜入射到接收阵列时,会产生明显的依次“到达”现象。接收阵列进行相应的包络校准,可使接收系统的物理孔径得到充分利用。本文提出了基于Keystone变换的阵列信号预处理方法,并进行了相应的理论推导和仿真分析验证。仿真结果表明,该方法能实现短脉冲信号包络盲校正,使接收阵列的物理孔径得到充分利用,可为后续波束形成、角度估计等提供基础。The energy of short pulse signals is relatively concentrated in the time domain,and when they are incident on the receiving array at an oblique angle,there will be a clear phenomenon of"arrival"in sequence.The physical aperture of the receiving system can be fully utilized by performing corresponding envelope calibration on the receiving array.In this paper,a pre-processing method of an array signal based on Keystone transform is proposed,and the corresponding theoretical derivation and simulation analysis verification are conducted.The simulation results show that the proposed method can obtain the effect of short pulse envelope arrival delay calibration in a uniform linear array,achieve blind correction of short pulse signal envelope,fully use of the physical aperture of the receiving array,and provide the basis for subsequent beam forming and angle estimation.

关 键 词：短脉冲信号 接收阵列 KEYSTONE变换 空域滤波 波束形成 

分 类 号：TN850[电子电信—信息与通信工程] O462[理学—电子物理学]