空域滤波增益可调节的定向性均匀圆形阵列波达角估计

doi:10.12305/j.issn.1001-506X.2021.07.10

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (7): 1804-1812.doi: 10.12305/j.issn.1001-506X.2021.07.10

空域滤波增益可调节的定向性均匀圆形阵列波达角估计

赵地^1,^2,*, 邓中亮¹, 谭伟杰³, 胡爱华¹, 唐诗浩¹

1. 北京邮电大学智能通信、导航与微纳系统实验室, 北京 100876
2. 中国电子科技集团公司第五十四研究所, 河北石家庄 050081
3. 贵州大学公共大数据国家重点实验室, 贵州贵阳 550025

收稿日期:2020-06-22 出版日期:2021-06-30 发布日期:2021-07-08
通讯作者: 赵地
作者简介:赵地 (1979—), 男, 高级工程师, 博士研究生, 主要研究方向为阵列信号处理、通信对抗|邓中亮 (1965—), 男, 教授, 博士研究生导师, 博士, 主要研究方向为智能通信、导航与微纳系统|谭伟杰 (1981—), 男, 讲师, 博士, 主要研究方向为阵列信号处理、通信信号处理、稀疏信号处理以及通信网络安全|胡爱华 (1978—), 女, 讲师, 博士研究生, 主要研究方向为无线传感器网络、信号处理|唐诗浩 (1992—), 男, 博士研究生, 主要研究领域为无线传感器网络、信号处理及导航定位
基金资助:
国家重点研发计划(2016YFB0502001);国家自然科学基金(61372110)

DOA estimation for directional UCA using adjustable spatial filtering gain

Di ZHAO^1,^2,*, Zhongliang DENG¹, Weijie TAN³, Aihua HU¹, Shihao TANG¹

1. Laboratory of Intelligent Communication, Navigation and Micro/Nano-Systems, Beijing University of Posts and Telecommunications, Beijing 100876, China
2. The 54th Research Institute of China Electronics Technology Group Gorporation, Shijiazhuang 050081, China
3. State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China

Received:2020-06-22 Online:2021-06-30 Published:2021-07-08
Contact: Di ZHAO

摘要/Abstract

摘要：

针对定向性均匀圆形阵列因单元天线的位置、主瓣指向及方向函数等因素造成信号来波落入天线旁瓣或零陷内, 从而导致部分单元天线接收的信号信噪比低、信息失效的问题, 首先研究了定向性均匀圆形阵列天线的方向性增益及功率波束角, 随后进一步分析了连续激励在定向性均匀圆阵远场的幅频响应, 最后提出了一种与波数无关的基于半功率波束宽度、增益可调节的空域滤波波达角估计模型。仿真实验结果表明, 与其他模型相比该模型在低信噪比下具有估计精度高、参与天线少的优点。与传统的定向性波达角估计模型相比, 当信噪比为-20 dB时, 该模型的临近空间角度分辨力明显优于前者, 并且随着可调节滤波增益至10 dB, 其临近角度的峰值隔离度可达65 dB。

关键词: 定向性均匀圆形阵列, 方向性增益, 空域滤波, 波达角估计

Abstract:

In order to solve the problem that the incoming signal falls into the side lobes or null of antenna due to the position of the element antenna, the main lobe pointing and direction function of the directional uniform circular array, which leads to the low signal to noise ratio (SNR) and information failure of the signals received by some element antennas, the directional gain and power beam angle of the directional uniform circular array is studied. Then, the amplitude-frequency response of continuous excitation in the far field of directional uniform circular array is analyzed. Finally, an adjustable gain spatial filter based on half power lobe width independent of wave number is designed to improve the conventional direction of arrival (DOA) estimation model. The simulation experiment results show that the proposed model has the advantages of higher estimation accuracy and fewer participating antennas under low SNR compared with other models. Compared with the traditional directional DOA estimation model, when the SNR is -20 dB, the resolution of the adjacent spatial angle for the proposed model is obviously better than that for the former model. And the peak isolation degree of the adjacent angle can reach 65 dB with the adjustable filter gain to 10 dB.

Key words: directional uniform circular array (UCA), directional gain, spatial filtering, DOA estimation

中图分类号:

TN911.7

赵地, 邓中亮, 谭伟杰, 胡爱华, 唐诗浩. 空域滤波增益可调节的定向性均匀圆形阵列波达角估计[J]. 系统工程与电子技术, 2021, 43(7): 1804-1812.

Di ZHAO, Zhongliang DENG, Weijie TAN, Aihua HU, Shihao TANG. DOA estimation for directional UCA using adjustable spatial filtering gain[J]. Systems Engineering and Electronics, 2021, 43(7): 1804-1812.

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空域滤波增益可调节的定向性均匀圆形阵列波达角估计

DOA estimation for directional UCA using adjustable spatial filtering gain

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