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CLC number: TN958.97

On-line Access: 2021-08-17

Received: 2020-04-02

Revision Accepted: 2020-07-19

Crosschecked: 2021-04-01

Cited: 0

Clicked: 5373

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Gang Chen

https://orcid.org/0000-0002-1744-9408

Jun Wang

https://orcid.org/0000-0002-3434-6312

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Frontiers of Information Technology & Electronic Engineering  2021 Vol.22 No.8 P.1140-1152

http://doi.org/10.1631/FITEE.2000143


Doppler ambiguity analysis and suppression for LTE-based passive bistatic radars


Author(s):  Luo Zuo, Jun Wang, Gang Chen

Affiliation(s):  National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China

Corresponding email(s):   zuoluo_xidian@163.com, wangjun@xidian.edu.cn

Key Words:  Passive bistatic radar (PBR), Long term evolution (LTE), Doppler ambiguity, Range-Doppler processing


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Luo Zuo, Jun Wang, Gang Chen. Doppler ambiguity analysis and suppression for LTE-based passive bistatic radars[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(8): 1140-1152.

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Abstract: 
In this study, we provide a detailed analysis of the frequency division duplex long term evolution downlink (FDD LTE DL) signal for passive bistatic radars that use the signal as an illuminator of opportunity. In particular, we analyze the cross-ambiguity function and illustrate its undesired deterministic peaks in the Doppler dimension due to the specific structure of the FDD LTE DL signal. A new adaptive mismatched filtering method is proposed for pre-processing the original reference signal to suppress these undesired deterministic peaks in the range-Doppler processing. The effectiveness of our proposed method is demonstrated via simulations following robustness analysis, showing that all undesired peaks are suppressed below −40 dB, with only 1.7 dB reduction in the main peak.

LTE外辐射源雷达多普勒维模糊副峰分析及抑制

左罗,王俊,陈刚
西安电子科技大学雷达信号处理国家重点实验室,中国西安市,710071
摘要:本文详细介绍了LTE频分物理下行链路信号(LTE信号)作为照射源的外辐射雷达系统。根据LTE信号特定的物理帧结构分析其模糊函数特性,同时探讨多普勒维不同类型副峰的形成机理。提出一种基于自适应参考信号预处理的失配滤波方法求解模糊权值因子,抑制模糊副峰的影响,提高目标检测性能。仿真结果表明所提方法可将副峰抑制至−40 dB以下,同时主峰损失仅为1.7 dB,验证了所提算法有效性。

关键词:外辐射源雷达(PBR);长期演进(LTE);多普勒维模糊副峰;距离多普勒二维联合

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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