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

• 作者: HUANG Xiaowei SHENG Xinqing
• 来源期刊: 系统工程与电子技术（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: DEFENCE ELECTRONICS TECHNOLOGY
• 页码范围: 72-79
• 页数: 8页
• 语种: 英文
• DOI: 10.23919/JSEE.2022.000008

摘要

This paper presents a novel method for fast calcula-tion 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 ar-bitrary observation points can be expressed explicitly via the NF-DB.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 me-thod can avoid time-consuming point-by-point NFC of the tradi-tional methods.Several numerical examples are presented to demonstrate the accuracy and efficiency of this method.In par-ticular,the echo simulation of a missile-target encounter exam-ple is presented to illustrate its capability for practical applica-tions.