复合调制雷达信号时差估计算法

熊鹏; 柳征; 姜文利

doi:10.12000/JR15072

复合调制雷达信号时差估计算法

DOI: 10.12000/JR15072

(国防科技大学电子科学与工程学院长沙 410073)

基金项目:

国家自然科学基金(61302141)资助课题

详细信息

作者简介:
熊鹏(1991–),男,江西九江人,国防科学技术大学,硕士研究生,研究方向为雷达信号处理。E-mail:xpengnudt@163.com;柳征(1978–),男,河北唐山人,国防科学技术大学,副研究员,硕士生导师,研究方向为综合电子战系统与技术、航天电子侦察信号处理;姜文利(1967–),男,山东莱阳人,国防科学技术大学,教授,博士生导师,研究方向为综合电子战系统与技术、航天电子侦察信号处理。

通讯作者:
熊鹏xpengnudt@163.com

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出版历程
- 收稿日期: 2015-06-05
- 修回日期: 2015-08-09
- 网络出版日期: 2015-08-28

TDOA Estimation Algorithm of Hybrid Modulation Radar Signals

(College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)

摘要

摘要: 现代雷达信号环境中, 复合调制信号正在逐步得到广泛应用。该文提出了一种针对频移键控与二相编码(FSK-BPSK)复合调制信号的时差估计算法。该算法紧密结合该信号子脉冲频率分布具有对称性, 时域长度具有一致性等特点, 通过子脉冲相关函数的理论推导得出FSK-BPSK复合调制脉冲信号的相关函数。最后利用相关函数拟合算法, 可根据观测数据进一步精确估计时间延迟(TDOA)。通过仿真实验, 证明该算法相比于其他时差估计算法, 其算法估计的准确性、抗噪性都有明显提升, 且适用于带宽较小的复合调制信号的时差估计情况。
- 复合调制信号 /
- 时差估计 /
- 相关函数拟合算法
Abstract: In the modern radar signal environment, hybrid modulation signals are increasingly used in many systems. This study focuses on the Time Difference Of Arrival (TDOA) estimation problem of FSK-BPSK hybrid modulation signals. The method combines the characteristic of modulated signal and utilizes the sum of simple correlation functions of sub-pulses to elicit the complex correlation function of the entire pulse signal. Finally, a correlation function fitting algorithm is used to estimate the exact TDOA. Experimental results indicate an obvious improvement in the accuracy and noise immunity of the method, and the method is appropriate for the TDOA estimation of low-bandwidth hybrid modulation signals.
- Hybrid modulation signal /
- Time Difference Of Arrival (TDOA) estimation /
- Correlation function fitting algorithm

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参考文献(13)

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