基于子空间追踪的无源信号检测技术  

Passive signal detection based on subspace tracking

作　　者：王建[1] 朱晓丹[1] 王利伟[1] Wang Jian Zhu Xiaodan Wang Liwei(No. 8511 Research Institute of CASIC, Nanjing 210007, Jiangsu,China)

机构地区：[1]中国航天科工集团8511研究所,江苏南京210007

出　　处：《航天电子对抗》2017年第3期50-53,共4页Aerospace Electronic Warfare

摘　　要：数字阵列瞬时全空域覆盖时,所需的波束数量随着阵列规模增大而增加,这将使得信号处理复杂度提升,设备量增大。为了减少大型阵列的设备量,提出了一种基于子空间追踪的无源信号检测技术。该技术利用辐射源信号在空域的稀疏性,用子空间追踪算法实时跟踪辐射源信号,将波束对准辐射源信号方向,进行自适应空域滤波,从而减少波束个数,降低计算量。该算法可以适应多信号形式,自适应地对多个辐射源的来波进行滤波,滤波之后的信号可以进行信号检测及信号分选,且波束个数不随阵列规模的增加而增加,可以大大减少大型阵列的设备量。With the enlargement of the digital array, the number of the digital beams in the coverage space is greatly increased. It greatly increases the amount of the equipment. To reduce the number of the equrit- ment, a passive signal detection based on subspace tracking is proposed. The subspace tracking algorithm is used to adjust the beam direction adaptively. According to the sparsity of the radiation signal in space, it great ly reduces the amount of calculation and the number of digital beams. It can be adapted to multi signal forms. The filtered signal can be used for signal detection and sorting. And the number of beams does not increase with the increase of the array size.

关 键 词：无源信号检测 子空间跟踪 数字阵列 

分 类 号：TN911.23[电子电信—通信与信息系统]