陈伯孝,,
杨婷,
杨明磊
西安电子科技大学雷达信号处理国家重点实验室 西安 710071
基金项目:国家自然科学基金(61571344, 61971323)，中央高校基本科研业务费专项基金，西安电子科技大学研究生创新基金
详细信息
作者简介:项厚宏：男，1994年生，博士生，研究方向为阵列信号处理、米波雷达测高、机器学习，深度学习
陈伯孝：男，1966年生，教授，博士生导师，研究方向为新体制雷达系统设计及其实现、目标精确制导与跟踪、机器学习、深度学习等
通讯作者:陈伯孝 bxchen@xidian.edu.cn
中图分类号:TN958计量
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被引次数:0
出版历程
收稿日期:2019-06-13
修回日期:2019-10-08
网络出版日期:2020-02-05
刊出日期:2020-07-23
Low-elevation DOA Estimation for VHF Radar Based on Multi-frame Phase Feature Enhancement
Houhong XIANG,Baixiao CHEN,,
Ting YANG,
Minglei YANG
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
Funds:The Natural Science Foundation of China (61571344, 61971323), The Fundamental Research Funds for the Central University, Innovation Fund of Xidian Univerisity
摘要
摘要:针对米波雷达低仰角目标的DOA估计问题，该文提出一种新的基于多帧相位特征增强方法，所提方法可以有效解决低仰角条件下阵列接收信号中直达信号相位特征模糊问题，进而提高DOA估计精度。通过学习多帧原始数据的相位分布特征与理想环境下直达波信号的相位分布特征之间的复杂映射关系，有效削弱多径信号引起的相位误差，将增强后的相位信息与原始的幅度信息进行数据重组，并利用已有的超分辨算法进行DOA估计。通过计算机仿真实验和实测数据验证，该文所提方法在DOA估计性能以及泛化能力上优于基于物理驱动的MUSIC算法以及数据驱动的基于特征反演和基于支持向量回归的两种估计方法。
关键词:雷达信号处理/
来波方向估计/
多帧相位增强/
米波雷达
Abstract:For the DOA estimation problem of low-elevation target of VHF radar, a new multi-frame phase feature enhancement based method is proposed, which solves effectively the phase feature ambiguity of direct signal, and thus improves the accuracy of DOA estimation. By learning the complex mapping relationship between the phase distribution of the multi-frame data and ideal phase distribution of the direct signal, the fuzzy phase information is enhanced and is used to reconstruct a new data matrix with original amplitude information. The DOA is estimated by conventional methods using new data matrix, which effectively improves the DOA estimation accuracy of the low-elevation target. The effectiveness of proposed method is validated by computer simulation experiments and real data, and it shows higher accuracy compared with physics-driven methods including MUSIC method and state-of-the-art data-driven method including feature reversal and Support Vector Regression (SVR).
Key words:Radar signal processing/
DOA estimation/
Multi-frame phase feature enhancement/
VHF radar
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