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CLC number: TN95

On-line Access: 2022-06-17

Received: 2021-01-04

Revision Accepted: 2021-03-31

Crosschecked: 2022-07-05

Cited: 0

Clicked: 3208

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Yong-bo Zhao

https://orcid.org/0000-0002-6453-0786

Sheng CHEN

https://orcid.org/0000-0003-3519-1137

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Frontiers of Information Technology & Electronic Engineering  2022 Vol.23 No.6 P.937-949

http://doi.org/10.1631/FITEE.2100003


Target height and multipath attenuation joint estimation with complex scenarios for very high frequency radar


Author(s):  Sheng CHEN, Yongbo ZHAO, Yili HU, Chenghu CAO, Xiaojiao PANG

Affiliation(s):  National Laboratory of Radar Signal Processing, Xidian University, Xi'an710071, China

Corresponding email(s):   ybzhao@xidian.edu.cn

Key Words:  Low-angle estimation, Very high frequency (VHF) radar, Complex scenarios, Multipath effect, Height estimation


Sheng CHEN, Yongbo ZHAO, Yili HU, Chenghu CAO, Xiaojiao PANG. Target height and multipath attenuation joint estimation with complex scenarios for very high frequency radar[J]. Frontiers of Information Technology & Electronic Engineering, 2022, 23(6): 937-949.

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publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.2100003"
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%A Yili HU
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A1 - Sheng CHEN
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Abstract: 
low-angle estimation for very high frequency (VHF) radar is a difficult problem due to the multipath effect in the radar field, especially in complex scenarios where the reflection condition is unknown. To deal with this problem, we propose an algorithm of target height and multipath attenuation joint estimation. The amplitude of the surface reflection coefficient is estimated by the characteristic of the data itself, and it is assumed that there is no reflected signal when the amplitude is very small. The phase of the surface reflection coefficient and the phase difference between the direct and reflected signals are searched as the same part, and this represents the multipath phase attenuation. The Cramer-Rao bound of the proposed algorithm is also derived. Finally, computer simulations and real data processing results show that the proposed algorithm has good estimation performance under complex scenarios and works well with only one snapshot.

甚高频雷达复杂场景中目标高度和多径衰减联合估计

陈胜,赵永波,胡毅立,曹成虎,庞晓娇
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:由于多径效应的影响,甚高频雷达低角估计是雷达领域难题之一,尤其是在反射条件未知的复杂情况下,低角估计更难解决。针对这一问题,提出一种目标高度和多径衰减联合估计算法。该算法首先利用数据本身的特性估算反射系数幅度,当该幅度估计值很小时,认为没有反射信号,然后将反射系数的相位和直达信号与反射信号之间的相位差当作同一部分,即多径相位衰减,并对其进行搜索。推导了该算法的克拉美罗界。最后,计算机仿真和实测数据处理结果表明,该算法在复杂场景下具有良好估计性能,并且在仅有单次快拍的条件下仍能较好地工作。

关键词:低角估计;甚高频雷达;复杂场景;多径效应;高度估计

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

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