Page 126 - 《应用声学》2020年第2期

第 39 卷 第 2 期 Vol. 39, No. 2
2020 年 3 月 Journal of Applied Acoustics March, 2020

⋄ 研究报告 ⋄

双基地合成孔径声呐时间同步误差分析

郭 慧 1,2,3 黄 勇 2,3† 王迎迎 1,2,3 刘纪元 2,3

(1 中国科学院大学 北京 100049)
(2 中国科学院声学研究所 北京 100190)
(3 中国科学院先进水下信息技术重点实验室 北京 100190)

摘要：双基地合成孔径声呐克服了单基地声呐系统的诸多缺陷，在成像等方面有很大优势，但时间同步仍然是
一个目前制约成像质量的重要因素，时间同步误差影响是值得关注的重要问题。在回波信号模型和时间同步
误差模型基础上，针对双基地合成孔径声呐进行误差影响的理论分析，并进行仿真验证。结果表明，固定时间
误差主要引起距离向聚焦位置偏移，线性时间误差引起方位向聚焦模糊和分辨率降低，随机时间误差引起距
离与方位向旁瓣升高。
关键词：双基地合成孔径声呐；时间同步误差；分辨率计算；误差影响分析
中图法分类号: TB56 文献标识码: A 文章编号: 1000-310X(2020)02-0284-08
DOI: 10.11684/j.issn.1000-310X.2020.02.016

Analysis of time synchronization errors in bistatic synthetic aperture sonar

GUO Hui 1,2,3 HUANG Yong 2,3 WANG Yingying 1,2,3 LIU Jiyuan 2,3

(1 University of Chinese Academic of Sciences, Beijing 100049, China)
(2 Institute of Acoustic, Chinese Academic of Sciences, Beijing 100190, China)
(3 Key Laboratory of Advanced Underwater Information, Chinese Academic of Sciences, Beijing 100190, China)

Abstract: The bistatic synthetic aperture sonar overcomes many shortcomings of the monostatic sonar system,
and has great advantages in imaging performance. However, time synchronization technology is still a significant
factor that restricts imaging quality, so analysis of time synchronization error is an important issue worthy of
attention. Based on the signal echo model and time synchronization error model, the resolution under the
influence of error is calculated, and the theoretical analysis of the error influence of the bistatic synthetic
aperture sonar is carried out and verified by simulation. The results show that the fixed time error mainly
results in focus position migration in distance dimension, the linear time error results in the azimuth focus
blur, and the random time error results in the rising of side lobes both in distance dimension and azimuth
dimension.
Keywords: Bistatic synthetic aperture sonar; Time synchronization errors; Resolution calculation; Analysis
of error impact

2019-04-01 收稿; 2019-11-28 定稿
作者简介: 郭慧 (1995– ), 女, 山西吕梁人, 硕士研究生, 研究方向: 双基地声呐同步技术。
† 通信作者 E-mail: y_huang@mail.ioa.ac.cn