电讯技术Issue(12)：1324-1329,6.DOI:10.3969/j.issn.1001-893x.2015.12.003
宽带随机混沌雷达高速目标速度估计与成像
Velocity Estimation and Imaging of High-speed Targets for Wide-band Stochastic Chaotic Radar
摘要
Abstract
A new radar signal, the randomly stepped carrier frequencies stochastic chaotic signal ( RSCF-SCS) ,is proposed because of characteristics of stochastic chaos such as true random behavior,sensitivity to initial condition,accessibility for generation and control,and easy realization and processing for the stepped frequency signal. Firstly,excited by an aperiodic function,a nonlinear system generates unpredictable sto-chastic chaotic signal( SCS) to form baseband subpulse by frequency modulation. Meanwhile,SCS is trans-formed to frequency-hopping( FH) codes to determine carrier frequencies step. RSCFSCS is used for ve-locity estimation and high-resolution range imaging of high-speed moving targets. The velocity estimation includes a coarse search and a precise search,where the coarse search is conducted with a fixed step to make the velocity deviation less than the velocity resolution,while the precise search adopts the golden sec-tion search( GSS) algorithm to get an accurate estimation of velocity. Then the spectra are coherently syn-thesized to realize wide bandwidth and high-resolution range imaging. Finally,numerical simulations dem-onstrate a good performance of the proposed signal model and the processing algorithm.关键词
随机混沌信号/噪声雷达/高分辨成像/步进频/动目标/速度估计Key words
stochastic chaotic signal/noise radar/high-resolution imaging/stepped frequency/moving tar-get/velocity estimation分类
信息技术与安全科学引用本文复制引用
唐骏,张璘,袁江南..宽带随机混沌雷达高速目标速度估计与成像[J].电讯技术,2015,(12):1324-1329,6.基金项目
国家自然科学基金资助项目(61202013) （61202013）
福建省自然科学基金资助项目(2015J01670) （2015J01670）
福建省教育厅资助项目(JA13235)Foundation Item:The National Natural Science Foundation of China (61202013) （JA13235）
The Natural Science Foundation of Fujian Province (2015J01670) （2015J01670）
The Fund of Educational Commission of Fujian Province(JA13235) （JA13235）
