| 基于曲线拟合的多项式相位信号参数估计 |
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| 引用本文： | 李越雷,张天骐,黄铫,蒋世文.基于曲线拟合的多项式相位信号参数估计[J].计算机应用,2009,29(Z1). |
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| 作者姓名： | 李越雷 张天骐 黄铫 蒋世文 |
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| 作者单位： | 重庆邮电大学,信号处理与片上系统研究所,重庆,400065 |
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| 基金项目： | 国家自然科学基金-中物院NSAF联合基金，国家自然科学基金，重庆市科委自然科学基金，重庆市教委自然科学基金，重庆市邮电大学自然科学基金 |
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| 摘 要： | 研究了多项式相位信号的参数估计问题.针对在分析高阶多项式相位信号时,维格纳-威利分布的交叉项使得时频分布图变得难以解释的问题,采用伪雏格纳-威利变换减少交叉项,并且从伪维格纳-威利分布提取出多项式相位信号的瞬时频率曲线,利用曲线拟合的方法拟合瞬时频率曲线,从而实现了多项式相位信号参数估计.对比了最小二乘曲线拟合和切比雪夫曲线拟合用于多项式相位信号参数估计的不同.最后通过仿真验证了曲线拟合用于多项式相位参数估计的有效性.
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| 关 键 词： | 多项式相位信号 伪雏格纳-威利变换 曲线拟舍 参数估计 |
Parameter estimation of polynimial phase signals based on curve fitting |
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| LI Yue-lei,ZHANG Tian-qi,HUANG Yao,JIANG Shi-wen.Parameter estimation of polynimial phase signals based on curve fitting[J].journal of Computer Applications,2009,29(Z1). |
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| Authors: | LI Yue-lei ZHANG Tian-qi HUANG Yao JIANG Shi-wen |
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| Affiliation: | Institute of Signal Processing and System-On-Chip;Chongqing University of Posts and Telecommunications;Chongqing 400065;China |
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| Abstract: | A parameter estimation method of polynomial phase signals was studied.Due to cross-terms in the Wigner-Ville Distribution(WVD) of the ploynomial phase signals,the figure of time-frequency distribution becomes difficult to understand.In this paper,cross-term attenuation was obtained by using pseudo Wigner-Ville transformation,then the instantaneous frequency curve could be extracted from pseudo Wigner-Ville distribution.The curve fitting algorithm was used to estimate parameters for the polynomial phase sign... |
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| Keywords: | polynomial phase signal pseudo Wigner-Ville transformation curve fitting parameter estimation |
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