Journal of Systems Engineering and Electronics ›› 2020, Vol. 31 ›› Issue (2): 312-320.doi: 10.23919/JSEE.2020.000009

• Defence Electronics Technology • Previous Articles     Next Articles

Dot-shaped beamforming analysis based on OSB log-FDA

Bo WANG1,*(), Junwei XIE1(), Jing ZHANG2(), Haowei ZHANG1()   

  1. 1 Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China
    2 Highway Railway College, Shaanxi Vocational and Technical College of Transport, Xi'an 710018, China
  • Received:2019-05-23 Online:2020-04-30 Published:2020-04-30
  • Contact: Bo WANG E-mail:wb_wangbo1991@163.com;xjw_xjw_123@163.com;zj_zhangjing1991@163.com;zhw_xhzf@163.com
  • About author:WANG Bo was born in 1991. He received his bachelor and master degrees from the Air and Missile Defense College, Air Force Engineering University, in 2013 and 2015, respectively. He is currently pursuing his Ph.D. degree in the Air and Missile Defense College. His research interests include signal processing and interference suppression technology based on FDA array radar.E-mail: wb_wangbo1991@163.com|XIE Junwei was born in 1970. He received his bachelor, master, and doctor degrees from the Air and Missile Defense College, Air Force Engineering University, in 1993, 1996 and 2009, respectively. He is currently a professor in the Air and Missile Defense College. His research interests include novel radar systems as well as jamming and anti-jamming. He has published more than 100 refereed journal articles, book chapters, and conference papers. E-mail: xjw_xjw_123@163.com|ZHANG Jing was born in 1991. She received her bachelor degree from Xi'an University of Architecture and Technology, in 2013. She received her master degree from the College of Science, Air Force Engineering University, in 2015. She is currently a lecturer in Shaanxi Vocational and Technical College of Transport. Her research interests include signal processing and interference suppression technology based on FDA array radar.E-mail: zj_zhangjing1991@163.com|ZHANG Haowei was born in 1992. He received his bachelor and master degrees from the Air and Missile Defense College, Air Force Engineering University, in 2014 and 2016, respectively. He is currently pursuing his Ph.D. degree in the Air and Missile Defense College. His research interests include multifunction radar resource management and intelligent scheduling. E-mail: zhw_xhzf@163.com
  • Supported by:
    the National Natural Science Foundation of China(61503408);This work was supported by the National Natural Science Foundation of China (61503408)

Abstract:

The range and angle information of the frequency diverse array (FDA) cannot be exclusively determined at the output of the array because of the range-angle coupled transmit beampattern. The best decoupling approach is to form a dot-shaped beampattern rather than the S-shaped beampattern of the basic FDA. Considering the degradation of the output signal-to-interference-plus-noise ratio (SINR) caused by the coupled beampattern, we propose a dot-shaped beamforming method based on the analyzed overlapping subarray-based using a logarithmic offset and a subarray-based planar FDA using a logarithmically increasing frequency offset, with elements transmitting at multiple frequencies. Several simulation results demonstrate the effectiveness of the proposed method in transmit energy focusing, sidelobe suppression and array resolution.

Key words: subarray-based frequency diverse array (SB FDA), planar frequency diverse array (PFDA), decoupling, dot-shaped beamforming