| 基于自适应谱峰搜索的脉冲重复间隔最大似然估计 |
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| 引用本文： | 叶浩欢,柳征,姜文利.基于自适应谱峰搜索的脉冲重复间隔最大似然估计[J].宇航学报,2012,33(5):635-641. |
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| 作者姓名： | 叶浩欢 柳征 姜文利 |
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| 作者单位： | 国防科技大学电子科学与工程学院,长沙,410073 |
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| 摘 要： | 高精度的脉冲重复间隔(PRI)估计对于提高现代电子情报(ELINT)系统的辐射源识别能力具有重要意义.将观测的脉冲到达时间(TOA)序列建模成点过程信号,其周期图谱谱峰就对应于PRI的最大似然估计(MLE).本文提出了一个“两步数值搜索”策略,可以确保搜索到谱峰而达到MLE.仿真表明,在低信噪比以及高脉冲丢失率条件下,本文算法性能远超已有算法.
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| 关 键 词： | 雷达 脉冲重复间隔 最大似然估计 周期点过程 周期估计 |
Maximum-Likelihood Pulse Repetition Interval Estimation Based on Adaptive Periodogram Peak Searching |
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| YE Hao-huan
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LIU Zheng
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JIANG Wen-li.Maximum-Likelihood Pulse Repetition Interval Estimation Based on Adaptive Periodogram Peak Searching[J].Journal of Astronautics,2012,33(5):635-641. |
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| Authors: | YE Hao-huan LIU Zheng JIANG Wen-li |
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| Institution: | (College of Electronic Science & Engineering,National University of Defense Technology,Changsha 100190,China) |
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| Abstract: | High-accuracy pulse repetition interval(PRI) estimation is meaningful for enhancing the emitter-identification abilities of modern electronic intelligence(ELINT) systems.The maximum-likelihood estimate(MLE) of PRI can be obtained by locating the peak of periodogram of a point process signal used to model the sequence of the time-of-arrival(TOA) measurements.In this paper,a novel two-step numerical search strategy is proposed to search the peak of the periodogram to ensure maximum-likelihood estimation.Simulation results show that our algorithm outperforms the existing methods,especially under the condition of low signal-to-noise ratio(SNR) or high pulse-missing-rate. |
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| Keywords: | Radar Pulse repetition interval Maximum likelihood estimation Periodic point process Period estimation |
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