Article Details

Title · Authors · Abstract · Keywords · DOI · References

A Signal Processing Method for Interferometer Direction Finding Based on DBF Array Antenna

HA Zhang, HU Chunjiang, LI Wei, DUAN Lefan

(Southwest China Research Institute of Electronic Equipment, Chengdu 610036, China)

Section：Communication Engineering · Vol. 2025, Issue 10 · Pages：13-16,22 · 2096-4706（2025）10-0013-05 · CLC number：TN911.7 · Document code：A · DOI：10.19850/j.cnki.2096-4706.2025.10.004

Abstract

Aiming at the problem that the interferometer system with a small number of array elements cannot make full use of the DBF array antenna elements when extracting array elements from the DBF array antenna to form an interferometer direction finding system, an interferometer direction finding signal processing method based on the DBF array antenna is proposed. By improving the interferometer direction finding algorithm, all the array element channel data extracted from the DBF array antenna are involved in the direction finding operation to improve the ambiguity resolution probability. At the same time, the method of averaging the correct direction finding results of multiple equal-length baselines is used to further improve the direction finding accuracy and improve the direction finding performance of the system. The effectiveness of the method is verified by theoretical derivation and simulation experiments.

Keywords

DBF; array antenna; interferometer; direction finding accuracy

References

  1. [1] Liao Guisheng, Tao Haihong, and Zeng Cao Radar Digital Beamforming Technology [M]. Beijing: National Defense Industry Press, 2017
  2. [2] Liu Hong Design and Implementation of DBF and Differential Beam Direction Finding [J]. Electronic Design Engineering, 2018, 26 (3): 107-110
  3. [3] Ma Yinling, Mao Xiuli Research on DBF based amplitude comparison direction finding method [J]. Ship Electronic Warfare, 2014, 37 (2): 91-93
  4. [4] Zhang Zhenghong Research on Digital Beam Synthesis and Direction Finding Technology [D]. Chengdu: University of Electronic Science and Technology of China, 2013
  5. [5] Yang Xinran, Wu Qiongzhi, Fan Qiuxiang Design of Multi channel Real time Array Signal Processing System [J]. Electronic Design Engineering, 2015, 23 (12): 176-179
  6. [6] Dong Guoying Research and Engineering Implementation of Digital Beamforming and Direction Finding Methods for Reconnaissance Array Receiver [D]. Xi'an: Xi'an University of Electronic Science and Technology, 2010
  7. [7] Zhou Jianwei, Li Daojing, Hu Xuan Test method of DBF antenna pattern based on beam scanning [J]. Journal of University of Chinese Academy of Sciences, 2016, 33 (4): 542-547
  8. [8] He Zishu, Xia Wei Modern Digital Signal Processing and Its Applications [M]. Beijing: Tsinghua University Press, 2009
  9. [9] Shi Rong Principles, Methods, and Applications of Interferometer Direction Finding [M]. Beijing: Electronic Industry Press, 2023
  10. [10] Duan Guowen, Gu Junjie Analysis of the Relationship between Interferometer Direction Finding Antenna Array Layout and Direction Finding Accuracy [J]. Electronic Information Warfare Technology, 2019, 34 (1): 56-60

About the authors

Ha Zhang (1980.02-), male, Hui ethnic, from Langzhong, Sichuan, senior engineer, doctoral student, research direction: radar signal processing.