Page 123 - 《应用声学）》2023年第5期

第 42 卷 第 5 期 Vol. 42, No. 5
2023 年 9 月 Journal of Applied Acoustics September, 2023

⋄ 研究报告 ⋄

Burst模式在多波束声呐高帧率测深方法中的应用

符晓磊 夏伟杰 † 赵宇凡

(南京航空航天大学电子信息工程学院 南京 211106)
摘要：在常规多波束测深声呐系统中，需要等待远距离目标信号到达接收基阵后才能再次发射探测信号，这将
导致测深帧率下降。针对该问题，该文提出了一种基于 Burst 模式的多波束声呐高帧率测深方法。由于各角度
的海底回波持续时间远小于远距离目标信号到达接收基阵的所需时间，根据这一特性，采用 Burst 模式，通过
等间隔地发射多帧信号并接收，同时保证发射的间隔大于最大波束持续时间，实现多帧信号在时间角度域中
的分离，提高测深系统帧率。由于相邻帧的隧道效应会与部分波束发生重叠，针对该问题采用改进的线性约束
最小方差算法，实现了低副瓣宽零陷的波束形成，从而削弱隧道效应的影响。最后通过仿真数据验证了该文所
提方法的有效性，表明该方法在特定条件下能够将测深帧率提高 3.3 倍。
关键词：多波束测深声呐；高帧率；线性约束最小方差算法；隧道效应
中图法分类号: TB566 文献标识码: A 文章编号: 1000-310X(2023)05-1015-09
DOI: 10.11684/j.issn.1000-310X.2023.05.015

The application of Burst mode in method of the multi-beam high frame rate

bathymetry

FU Xiaolei XIA Weijie ZHAO Yufan

(College of Electronical and Information Engineering, Nanjing University of Aeronautics and Astronautics,
Nanjing 211106, China)

Abstract: In the conventional multi-beam bathymetry system, it is necessary to wait for the remote target
signals to reach receiving array before re-launching the probe signals, which leads to the decrease of the
bathymetry frame rate. In terms of this issue, a method of the multi-beam high frame rate bathymetry is
proposed on the basis of Burst mode. The duration of the submarine echo at each angle is much less than
the time required for the remote signals arrival. According to this feature, the Burst mode is adopted which
transmits multiple frames of signals at equal intervals and then receives them, ensuring that the transmission
interval is larger than the maximum beam duration simultaneously. It can realize the separation of multi-
frame signals in the time and angle domain, and improve the frame rate of the bathymetry system. Since the
tunnel effect of adjacent frames will overlap with some part beams, an improved linearly constrained minimum
variance beamforming algorithm is used to weaken the influence of tunneling effect, which realizes beamforming
with low sidelobe and broad null. Finally, the effectiveness of the method proposed in this paper is verified
by simulation data, which shows that the method can increase the bathymetry frame rate by 3.3 times under
certain conditions.
Keywords: Multi-beam bathymetric sonar; High frame rate; Linearly constrained minimum variance
algorithm; Tunnel effect

2022-05-16 收稿; 2022-06-14 定稿
作者简介: 符晓磊 (1997– ), 男, 江苏无锡人, 硕士研究生, 研究方向: 信号与信息处理。
† 通信作者 E-mail: nuaaxwj@nuaa.edu.cn