Journal of Systems Engineering and Electronics ›› 2022, Vol. 33 ›› Issue (1): 72-79.doi: 10.23919/JSEE.2022.000008

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

A novel method for radar echo simulation based on fast-constructed database

Xiaowei HUANG(), Xinqing SHENG*()   

  1. 1 Institute of Radio Frequency Technology and Software, School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, China
  • Received:2021-02-03 Accepted:2021-12-29 Online:2022-01-18 Published:2022-02-22
  • Contact: Xinqing SHENG;
  • About author:|HUANG Xiaowei was born in 1995. He is pursuing his Ph.D. degree in Beijing Institute of Technology. His research interests are computational electromagnetics, domain decomposition methods, and fast solvers for integral equations. E-mail:||SHENG Xinqing was born in 1968. He is a chair professor in Beijing Institute of Technology. His research interests are computational electromagnetics, scattering and antenna analysis, electromagnetic compatibility, and microwave imaging. E-mail:
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (2017YFB0202500)


This paper presents a novel method for fast calculation of radar echo in near-field regions after the equivalent source has been computed by method of moments (MoM). An easy-to-access near-field database (NFDB) is established, which is built on the auxiliary tetrahedral meshes surrounding the near-field regions of interest. The near-fields calculation (NFC) of arbitrary observation points can be expressed explicitly via the NFDB. An efficient matrix compression scheme named random sampling-based butterfly factorization (RS-BF) is proposed to speed up the construction of NFDB. With this approach, each group of O(N) elements in the database can be calculated through one fast matrix-vector multiplication operation that has a computational complexity below O(Nlog2N). The proposed method can avoid time-consuming point-by-point NFC of the traditional methods. Several numerical examples are presented to demonstrate the accuracy and efficiency of this method. In particular, the echo simulation of a missile-target encounter exam-ple is presented to illustrate its capability for practical applications.

Key words: radar echo simulation, near-field database (NFDB), butterfly factorization (BF)