| 重频参差相参脉冲串频率估计算法 |
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| 引用本文： | 张刚兵,刘渝,邓振淼.重频参差相参脉冲串频率估计算法[J].数据采集与处理,2011,26(2). |
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| 作者姓名： | 张刚兵 刘渝 邓振淼 |
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| 作者单位： | 南京航空航天大学信息科学与技术学院,南京,210016 |
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| 基金项目： | 国家高技术研究发展计划(“八六三”计划)(2006AA701413)资助项目 |
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| 摘 要： | 研究了重频参差相参脉冲串的频率估计算法。通过脉内相关积累,提高了新序列的信噪比。对新序列的相位差按参差重数抽样平均,减小了等效的相位噪声方差,利用重频参差比解相位模糊,扩大了频偏允许范围,降低了算法的信噪比门限。分析了本算法实现相参频率估计的条件,推导了相应信噪比门限的解析表达式,指出了信噪比门限与信号样本总数、参差重数、参差比之间的关系。仿真结果表明:上述结论是正确的,在满足信噪比门限条件下,频率估计的精度接近相参脉冲串频率估计的克拉美-罗限(CRLB)。
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| 关 键 词： | 重频参差 频率估计 解相位模糊 信噪比门限 |
Frequency Estimation for Staggered Coherent Pulse Train |
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| Zhang Gangbing,Liu Yu,Deng Zhenmiao.Frequency Estimation for Staggered Coherent Pulse Train[J].Journal of Data Acquisition & Processing,2011,26(2). |
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| Authors: | Zhang Gangbing Liu Yu Deng Zhenmiao |
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| Affiliation: | Zhang Gangbing,Liu Yu,Deng Zhenmiao(College of Information Science and Technology,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China) |
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| Abstract: | A high accurate frequency estimation algorithm of staggered coherent pulse train is studied.The signal-to-noise ratio(SNR) of a new sequence is enhanced through intrapulse correlation accumulation.Resampling and averaging the phase difference of the sequence according to the number of stagger ratio can reduce the equivalent phase noise.Resolving phase ambiguity through the stagger ratio could enlarge the scope of the frequency difference and decrease the SNR threshold.The requirement for coherent frequency ... |
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| Keywords: | staggered pulse repetition frequency(PRF) frequency estimation resolving phase ambiguity signal-to-noise ratio(SNR) threshold |
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