数据采集与处理2017，Vol.32Issue(5)：913-920,8.DOI:10.16337/j.1004-9037.2017.05.008
二次雷达混扰信号的迭代投影分选算法
Iterative Projection Algorithm to Separate Garbled Secondary Surveillance Radar Replies
摘要
Abstract
To overcome the problem of decoding errors of secondary surveillance radar (SSR) due to the phenomenon of garble,an iterative projection algorithm for separating the garbled replies is proposed.Firstly,a signal model for the garbled replies is established in which the influence factors such as antenna structure,residual carrier frequency and so on are taken a full consideration,and an optimization model with double matrix variables is proposed based on the maximum likelihood estimation of the unknown variable in the model.Then,the initial value of replies is estimated by the algorithm of noncircular complex fast independent component analysis (nc-FastICA).And then,the iterative projection algorithm based on the zero/constant modulus (ZCM) property of SSR replies is proposed to separate garbled SSR replies.Numerical simulations show that the proposed method can separate multiple replies accurately in the complex environment such as shorter distance of the transponders and inaccuracy in the antenna and so on,and it outperforms the algorithm of nc-FastICA obviously in the separation performance.关键词
二次雷达/盲分选/混扰信号/迭代投影Key words
secondary surveillance radar (SSR)/blind signal separation (BSS)/garbled replies/iterative projection分类
信息技术与安全科学引用本文复制引用
刘垒,张玉,唐波..二次雷达混扰信号的迭代投影分选算法[J].数据采集与处理,2017,32(5):913-920,8.基金项目
国家自然科学基金(61671453,61201379)资助项目 （61671453,61201379）
安徽省自然科学基金(120805QF103)资助项目. （120805QF103）
