Journal of Systems Engineering and Electronics ›› 2025, Vol. 36 ›› Issue (5): 1132-1139.doi: 10.23919/JSEE.2025.000106

• ELECTRONICS TECHNOLOGY • Previous Articles    

Direction finding for wideband signal and multi-target with interferometer

Bo PENG1,2,*(), Jikang SUN2(), Chao LI2()   

  1. 1 School of Information and Electronics, Beijing Institute of Technology, Beijing 100089, China
    2 Three Department, Jiangsu Automation Research Institute, Lianyungang 222061, China
  • Received:2024-07-18 Accepted:2025-07-01 Online:2025-10-18 Published:2025-10-24
  • Contact: Bo PENG E-mail:archubo@126.com;sjk_93@163.com;lichao972@126.com
  • About author:
    PENG Bo was born in 1987. He received his B.S. and M.S. degrees from Nanjing University, in 2009 and 2012, respectively. He is a senior engineer in Jiangsu Automation Research Institute and is currently pursuing his Ph.D. degree in Beijing Institute of Technology. His research interests are electronic information and signal processing. E-mail: archubo@126.com

    SUN Jikang was born in 1993. He received his B.S. degree from North University of China in 2012 and M.S. degree from Nanjing University of Science and Technology in 2016. He is currently an engineer in Jiangsu Automation Research Institute. His research interests are digital signal processing and simulation technology. E-mail: sjk_93@163.com

    LI Chao was born in 1990. He received his B.S. and Ph.D. degrees from Xidian University in 2013 and 2019, respectively. He is currently a senior engineer in Jiangsu Automation Research Institute. His research interests are signal processing and simulation technology. E-mail: lichao972@126.com

Abstract:

According to the measurement principle of the traditional interferometer, a narrowband signal model is established and used, however, for wideband signals or multiple signals, this model is invalid. For the problems of direction finding with interferometer for wideband signals and multiple signals scene, a frequency domain phase interferometer is proposed and the concrete implementation scheme is given. The proposed method computes the phase difference in frequency domain, and finds multi-target results with judging the spectrum amplitude changing, and uses the frequency phase difference to compute the arrival angle. Theoretical analysis and simulation results show that the proposed method effectively solves the problem of the angle estimation with phase interferometer for wideband signals, and has good performance in multiple signals scene with non-overlapping spectrum or partially overlapping. In addition, the wider the signal bandwidth, the better direction finding performance of this algorithm.

Key words: phase interferometer, wideband signal direction finding, multi-signal direction finding, frequency domain interferometer