无源雷达目标信号时延与多普勒频率联合估计

doi:10.11959/j.issn.1000-436x.2015124

通信学报 ›› 2015, Vol. 36 ›› Issue (5): 47-55.doi: 10.11959/j.issn.1000-436x.2015124

无源雷达目标信号时延与多普勒频率联合估计

王鹏¹,邱天爽¹,李景春²,谭海峰^2,³

¹ 大连理工大学电子信息与电气工程学部，辽宁大连 116024
² 国家无线电监测中心，北京100037
³ 北京邮电大学信息与通信工程学院，北京 100876

出版日期:2015-05-20 发布日期:2015-07-17
基金资助:
国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目

Joint estimation of target time delay and Doppler frequency in passive radar system

ANGPeng W¹,IUTian-shuang Q¹,IJing-chun L²,ANHai-feng T^2,³

¹ Faculty of Electronic Information and Electrical Engineering,Dalian University of Technology,Dalian 116024,China
² State Radio Monitoring Center,Beijing 100037,China
³ School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China

Online:2015-05-20 Published:2015-07-17
Supported by:
The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China

摘要/Abstract

摘要：

提出一种基于STFRFT的无源雷达目标时延与多普勒联合估计新方法。首先，给出了一种STFRFT时频分辨率量化方法及其数学表达式；其次，利用STFRFT的投影包络对回波信号时延与Doppler频移进行了联合估计；最后，讨论分析了脉内信噪比、高斯窗参数等对所提方法估计性能的影响。仿真结果表明，与 CAF 方法相比，所提方法更容易获得高精度的时延与Doppler频移的联合估计，具有更高的可靠性。

关键词: 短时分数阶傅里叶变换, 时延, Doppler频移, 无源雷达

Abstract:

A novel method of joint estimation of time delay and Doppler shift in passive radar system based on short-time fractional Fourier transform (STFRFT) was proposed.Firstly,the mathematical expression of the STFRFT time-frequency resolution was studied for the quantitative comparison.Secondly,based on the projection envelops of STFRFT,a new method to estimate the time delay and Doppler shift was put forward.Finally,the factors related with the estimation precision such as signal-to-noise ratio (SNR),parameters of Gaussian window were analyzed.The simulation results demonstrate that compared with the CAF based method,proposed method can get precise time delay and Doppler shift estimations with higher probability.

Key words: short-time fractional Fourier transform, time delay, Doppler shift, passive radar

王鹏,邱天爽,李景春,谭海峰. 无源雷达目标信号时延与多普勒频率联合估计[J]. 通信学报, 2015, 36(5): 47-55.

ANGPeng W,IUTian-shuang Q,IJing-chun L,ANHai-feng T. Joint estimation of target time delay and Doppler frequency in passive radar system[J]. Journal on Communications, 2015, 36(5): 47-55.

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无源雷达目标信号时延与多普勒频率联合估计

Joint estimation of target time delay and Doppler frequency in passive radar system

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