| 基于分数阶傅里叶变换的多项式相位信号参数估计 |
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| 引用本文： | 金翔,张天骐,庞统,杜晓华.基于分数阶傅里叶变换的多项式相位信号参数估计[J].电子技术应用,2010(7). |
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| 作者姓名： | 金翔 张天骐 庞统 杜晓华 |
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| 基金项目： | 国家自然科学基金-中物院NSAF联合基金项目，国家自然科学基金项目，教育部新世纪优秀人才支持计划，重庆市科委自然科学基金项目，重庆市教委自然科学基金项目，重庆邮电大学自然科学基金项目 |
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| 摘 要： | 研究了一种基于分数阶傅里叶变换(FRFT)的多项式相位信号快速估计方法,对于线性调频信号(LFM),即用信号延时相关解调的方法得到调频斜率的粗略估计,从而得到分数阶旋转角度的范围,简化为小范围的一维搜索问题。多项式相位信号的检测通过延时相关解调可转化为LFM信号的检测,再运用FRFT便可进行参数估计。理论分析与仿真结果表明该方法简单,估计性能好。
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| 关 键 词： | 分数阶Fourier变换 多项式相位信号 延时相关解调 参数估计 |
Polynominal phase signal estimation based on the fractional Fourier transform |
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| JIN Xiang,ZHANG Tian Qi,PANG Tong,DU Xiao Hua.Polynominal phase signal estimation based on the fractional Fourier transform[J].Application of Electronic Technique,2010(7). |
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| Authors: | JIN Xiang ZHANG Tian Qi PANG Tong DU Xiao Hua |
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| Abstract: | This paper researches a method for polynominal phase signal fast estimation based on the fractional Fourier trans-form(FRFT),which can be used to estimate the value of chirp ratio approximately by delay-related correlative dechirp,and for the LFM signal,the corresponding rotation angle of FRFT could be derived from this value,which simplifies detection to one-dimen-sion searching in limited range.Polynomial phase signal(PPS) can be converted to LFM signal,then proceed to parameter estimation by FRFT.Theoretic analysis and simulation results prove that this method can obtain good estimation performance with little compu-tation complexity. |
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| Keywords: | fractional Fourier transform polynominal phase signal delay-related correlative dechirp parameter estimation |
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