Journal of Systems Engineering and Electronics ›› 2022, Vol. 33 ›› Issue (1): 91-96.doi: 10.23919/JSEE.2022.000010

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Adaptive transmit beamspace optimization design based on RD-log-FDA radar

Zihang DING(), Junwei XIE*(), Zhengjie LI()   

  1. 1 Air and Missile Defense College, Air Force Engineering University, Xi’an 710051, China
  • Received:2020-09-10 Online:2022-01-18 Published:2022-02-22
  • Contact: Junwei XIE E-mail:dingzihang0831@163.com;xjw_xjw_123@163.com;afeu.lzj@163.com
  • About author:|DING Zihang was born in 1997. He received his B.S. degree from the Air and Missile Defense College, Air Force Engineering University, Xi’an, Shaanxi, China, in 2019, where he is currently pursuing his M.S. degree. His research interests include beamforming and parameter estimation based on frequency diverse array radar. E-mail: dingzihang0831@163.com||XIE Junwei was born in 1970. He received his B.S., M.S., and Ph.D. degrees from the Air and Missile Defense College, Air Force Engineering University, Xi’an, Shaanxi, China, in 1993, 1996, and 2009, respectively, where he is currently a professor. He has published more than 100 refereed journal articles, book chapters, and conference papers. His research interests include novel radar systems as well as jamming and anti-jamming. E-mail: xjw_xjw_123@163.com||LI Zhengjie was born in 1995. He received his B.S. degree in the Air and Missile Defense College, Air Force Engineering University, Xi’an, Shaanxi, China, in 2018. Now he is currently pursuing his M.S. degree in weapon science and technology from Air Force Engineering University. His research interests include multifunction radar resource allocation, sensor scheduling, and multiple target tracking. E-mail: afeu.lzj@163.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (62001506)

Abstract:

Because of the range-angle dependency in random log frequency diverse array (RD-log-FDA) radar, a method for designing beamspace transformation matrix in angle and range based on the receive signal has been proposed. It is demonstrated that the designed beamspace transformation matrix basically meets the requirements of beam gain. However, there are some problems in the transformation matrix designed, such as unstable beam gain and high sidelobe. Hence, we propose an optimization method by adjusting array element spacing and random number in frequency offset to get the optimum beam gain. Therefore, particle swarm optimization (PSO) is used to find the optimal solution. The beam gain comparison before and after the optimization is obtained by simulation, and the results show that the optimized array after beamspace preprocessing has more stable beam gain, lower sidelobe, and higher resolution in parameter estimation. In conclusion, the RD-log-FDA is capable of forming desired beam gain in angle and distance through beamspace preprocessing, and suppressing interference signals in other areas.

Key words: beamspace, random log frequency diverse array (RD-log-FDA), transformation matrix, particle swarm optimization (PSO)