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

ANGPeng W; IUTian-shuang Q; IJing-chun L; ANHai-feng T

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

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

Academic paper | 更新时间：2024-06-05

- Joint estimation of target time delay and Doppler frequency in passive radar system
- Journal on Communications Vol. 36, Issue 5, Pages: 47-55(2015)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61139001);The National Natural Science Foundation of China(61172108);The National Natural Science Foundation of China(81241059)
- DOI：10.11959/j.issn.1000-436x.2015124
  CLC： TN958.97
- Online First：2015-05，
  
  Published：25 May 2015
- 稿件说明：
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ANGPeng W, IUTian-shuang Q, IJing-chun L, et al. Joint estimation of target time delay and Doppler frequency in passive radar system[J]. Journal on Communications, 2015, 36(5): 47-55.
DOI：

ANGPeng W, IUTian-shuang Q, IJing-chun L, et al. Joint estimation of target time delay and Doppler frequency in passive radar system[J]. Journal on Communications, 2015, 36(5): 47-55. DOI： 10.11959/j.issn.1000-436x.2015124.

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。

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.

关键词

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references

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