| 低信噪比下线性调频信号检测与参数估计 |
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| 引用本文： | 李英祥,肖先赐.低信噪比下线性调频信号检测与参数估计[J].系统工程与电子技术,2002,24(8):43-45. |
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| 作者姓名： | 李英祥 肖先赐 |
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| 作者单位： | 电子科技大学电子工程学院,四川,成都,610054 |
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| 摘 要： | 对低信噪比下线性调频信号的参数估计方法进行了分析 ,提出了首先由信号分段相关解线调的方法得到调频斜率的粗略估计 ,再以此估计值为初值 ,采用局部解线调的技术在一定范围内搜索计算 ,从而快速实现局部Radon Wigner变换检测 ,并给出了线性调频信号参数的极大似然估计。计算机模拟仿真证明了此方法的有效性。
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| 关 键 词： | 线性调频信号 解线调 Radon-Wigner变换 参数估计 |
| 文章编号： | 1001-506X(2002)08-0043-03 |
| 修稿时间： | 2001年7月15日 |
Linear Frequency-Modulated Signal Detection and Parameter Estimation in Low Signal-to-Noise Ratio Condition |
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| LI Ying xiang,XIAO Xian ci.Linear Frequency-Modulated Signal Detection and Parameter Estimation in Low Signal-to-Noise Ratio Condition[J].System Engineering and Electronics,2002,24(8):43-45. |
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| Authors: | LI Ying xiang XIAO Xian ci |
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| Abstract: | A method for linear frequency modulated (LFM) signal detection and parameter estimation is proposed. Based on the segmented correlation dechirp method, we get a rough estimation of the frequency rate. After that, we take it as an initial value of the direct dechirp method, and then search the accuracy value in a certain scope. Thus we can detect signal by local Radon Wigner transform and get the parameter maximum likelihood (ML) estimation quickly. The effectiveeness of this method has been shown by computer simulation. |
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| Keywords: | Linear frequency modulated signal Dechirp Radon Wigner transform Parameter estimation |
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