重庆邮电大学学报（自然科学版）2016，Vol.28Issue(4)：473-480,8.DOI:10.3979/j.issn.1673-825X.2016.04.006
一种分数域二分法 LFM 信号参数估计方法
Fractional domain dichotomy LFM signal parameter estimation method
摘要
Abstract
Traditional parameter estimation methods of linear frequency modulation(LFM)signal based on fractional fourier transform did not deal with the contradiction between the satisfactory precision and the lesser computation cost .Therefore, a fractional domain dichotomy is proposed in this paper.Firstly,the effect of the transform order error on the parameter es-timation error is analyzed and quantified.Then,the fractional domain dichotomy is adopted to obtain the optimal order of single component LFM signal corresponding to fractional domain minimum bandspread.Finally,the parameters are esti-mated according to the optimal order and the peak position.The parameters of strong and weak mixing multi-component LFMsignal are estimated by using successive reconstruction and elimination method.Simulation results show that,com-pared with the traditional method,the method can meet the requirement of estimation precision with the computation cost re-duced significantly.关键词
分数阶傅里叶变换/线性调频(LFM)信号/分数域/二分法/最优阶次Key words
fractional Fourier transform/linear frequency modulated(LFM)signal/fractional domain/dichotomy/the opti-mal order分类
信息技术与安全科学引用本文复制引用
孙乐,魏军,张衡阳,刘立,王建翔..一种分数域二分法 LFM 信号参数估计方法[J].重庆邮电大学学报（自然科学版）,2016,28(4):473-480,8.基金项目
国家自然科学基金（61202490）；航空科学基金（2013ZC15008） Foundation ItemsThe National Natural Science Foundation of China（61202490）；The Aeronautical science Foundation of China （）
