| 引用本文: | 黄 龙,郭树人,徐 昂,等.基于脉冲串信号的无源定位系统频差估计误差CRLB分析.[J].国防科技大学学报,2013,35(2):109-114.[点击复制] |
| Huang Long,Guo Shuren,Xu ang,et al.CRLB analysis of FDOA estimation accuracy based on pulse trains in passive location system[J].Journal of National University of Defense Technology,2013,35(2):109-114[点击复制] |
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| 基于脉冲串信号的无源定位系统频差估计误差CRLB分析 |
| 黄 龙1, 郭树人2, 徐 昂2, 王飞雪1 |
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(1.国防科技大学 电子科学与工程学院，湖南 长沙 410073;2.北京跟踪与通信技术研究所，北京 100094)
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| 摘要: |
| 频差估计是无源定位系统中的关键部分，其估计精度直接决定了无源定位系统的性能。本文对单频脉冲信号频差估计误差方差的Cramer-Rao下限（CRLB）进行了理论分析研究。在建立数学模型的基础上，定量分析了频差估计误差CRLB与接收信号参数的数学关系。通过直接公式推导和数值仿真归纳，分别得出了相参/非相参单频脉冲信号频差估计误差CRLB的解析表达式，该结论可用于指导基于频差估计的无源定位系统设计。 |
| 关键词: 无源定位 脉冲信号 频差估计 CRLB |
| DOI： |
| 投稿日期：2012-06-02 |
| 基金项目: |
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| CRLB analysis of FDOA estimation accuracy based on pulse trains in passive location system |
| Huang Long1, Guo Shuren2, Xu ang2, Wang Feixue1 |
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(1.College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073,China;2.Institute of Tracking and Telecommunication Technology, Beijing 100094, China)
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| Abstract: |
| The frequency difference of arrival (FDOA) estimation is the key point in a passive
location system, and the estimation accuracy of FDOA determines the location performance. The FDOA estimation
methods have been widely studied, but theoretical maximal accuracy of FDOA estimation is barely referred. To
explore the ultimate performance of the FDOA estimation, the CRLB of frequency FDOA estimation accuracy was
studied. On the basis of building a mathematical model, the quantitative relationship between the FDOA
estimation accuracy and the parameters of received signal was investigated. By the means of mathematical
deduction and numerical simulation, the algebraic expression of the CRLB was conducted in different
application modes. Finally the characteristic of the CRLB was evaluated, and the conclusion can be used to
direct the design of passive location system based on FDOA. |
| Keywords: passive location pulse signal FDOA CRLB |
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