| 基于多速率欠采样的超宽带LFM信号参数估计 |
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| 引用本文： | 吴婷婷,田书林. 基于多速率欠采样的超宽带LFM信号参数估计[J]. 现代电子技术, 2007, 30(12): 151-152,163 |
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| 作者姓名： | 吴婷婷 田书林 |
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| 作者单位： | 电子科技大学,自动化工程学院,四川,成都,610054 |
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| 摘 要： | 针对基于多速率欠采样的超宽带LFM信号瞬时频率估计方法中,余数的很小测量误差将导致很大的测频误差问题,提出一种基于欠采样的超宽带LFM信号参数估计算法。该算法在多速率欠采样方法的基础上,对错误的瞬时频率估计值进行重估计,剔除大误差后通过线性拟合的方法可在-6 dB信噪比环境下稳定地对线性调频信号进行参数估计。计算机仿真实验验证了该方法的有效性。
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| 关 键 词： | 欠采样 余数定理 调频斜率 初始频率 |
| 文章编号： | 1004-373X（2007）12-151-02 |
| 收稿时间： | 2006-10-31 |
| 修稿时间： | 2006-10-31 |
An Algorithm for Estimation Parameters of Ultra-wideband LFM Signal Based on Multi-Channel and Sub-sampling |
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| WU Tingting,TIAN Shulin. An Algorithm for Estimation Parameters of Ultra-wideband LFM Signal Based on Multi-Channel and Sub-sampling[J]. Modern Electronic Technique, 2007, 30(12): 151-152,163 |
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| Authors: | WU Tingting TIAN Shulin |
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| Abstract: | In the algorithm for estimation of frequency of ultra-wideband LFM signal based on multi-channel and sub-sampling,even tiny error of the remainder can lead to huge error of the frequency.Based on the traditional one,a new algorithm,which precisely estimates the parameters of LFM signal down to-6 dB by re-estimating the wrong-estimated frequency is presented in this paper.Simulation shows the validity of the algorithm. |
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| Keywords: | sub-sampling remainder algorithm modulation rate center frequency |
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