重庆邮电大学学报（自然科学版）2010，Vol.22Issue(4)：400-405,6.
基于瞬时频率曲线拟合和局部搜索组合方法的三阶多项式相位信号参数估计
Combination of instantaneous frequency curve fitting and local search method for 3-order polynomial phase signal parameter estimation
李英祥 1唐伟文 2邝育军3
作者信息
- 1. 成都信息工程学院,通信工程学院,四川,成都,610225
- 2. 四川通信科研规划设计有限责任公司,四川,成都,610041
- 3. 电子科技大学,通信工程学院,四川,成都,610054
- 折叠
摘要
Abstract
3 order polynomial phase signals(PPS)are important and common non-stationary signals.A new method was proposed to estimate the PPS parameters in low SNR under non-cooperative condition.Firstly,filter bank combining with short time Radon-Wigner transform algorithm was adopted to get a rough estimation of the instantaneous frequency(IF)curve.Then,a 3-oder polynomial was used to fit the IF curve by least square method and a rough estimation of the signal parametem was made.After that,local two-dimension searching and FFr dechirp method were used to get the parameter's accurate estimation.The merit of this new method is validated by illustrative examples in low SNR and relatively shon data length condition.关键词
多项式相位信号(PPS)/参数估计/曲线拟合/滤波器组Key words
polynomial phase signal(PPS)/parameter estimation/cure fitting/filter bank分类
信息技术与安全科学引用本文复制引用
李英祥,唐伟文,邝育军..基于瞬时频率曲线拟合和局部搜索组合方法的三阶多项式相位信号参数估计[J].重庆邮电大学学报（自然科学版）,2010,22(4):400-405,6.
