Page 82 - 《应用声学》2022年第5期

第 41 卷 第 5 期 Vol. 41, No. 5
2022 年 9 月 Journal of Applied Acoustics September, 2022

⋄ 研究报告 ⋄

正交多相码连续波主动声呐回波检测算法设计 ∗

颜恒平 1 刘大利 2,3†

(1 海鹰企业集团有限责任公司 无锡 214061)
(2 天津工业大学电气与电子工程学院 天津 300387)
(3 中国科学院声学研究所 声场声信息国家重点实验室 北京 100190)
摘要：与常规脉冲式主动声呐相比，连续波主动声呐能够提高目标回波的时间处理增益和目标信息更新速率。
该文提出一种由正交多相码合成的连续发射波形，分析了发射信号和目标回波模型，设计了多通道匹配滤波
器组完成回波检测。为了进一步提高接收机检测性能，提出了多通道非相干积累的处理方法。通过数值仿真，
分析提出的连续波形的多普勒分辨性能和目标信息更新率。通过蒙特卡罗法获取接收机工作特性曲线，比较
了脉冲式主动声呐和连续波主动声呐在均匀混响背景下对单目标检测性能的差异。仿真结果表明，该文设计
的连续波波形具有较好的多普勒分辨性能，在均匀混响背景下，回波检测算法能够明显提高单个目标的探测
能力。
关键词：连续波主动声呐；正交多相码；多通道；非相干积累；接收机工作特性曲线
中图法分类号: TB566 文献标识码: A 文章编号: 1000-310X(2022)05-0758-07
DOI: 10.11684/j.issn.1000-310X.2022.05.010

Design of echo detection algorithm for continuous active sonar composed of

orthogonal polyphase codes

YAN Hengping 1 LIU Dali 2,3

(1 Haiying Enterprise Group Co., Ltd., Wuxi 214061, China)
(2 School of Electrical and Electronic Engineering, Tiangong University, Tianjin 300387, China)
(3 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)

Abstract: Compared with conventional pulsed active sonar (PAS), continuous active sonar (CAS) can improve
the time processing gain of target echoes and target information update rate. In this paper, a continuous
transmitting waveform composed of orthogonal polyphase codes is proposed, the models of the transmitting
signal and target echo are analyzed, and multi-channel matched filter banks are designed to detect echoes.
In order to improve the detection performance of the receiver, a multi-channel incoherent integration method
is proposed. In the simulation, the performance of Doppler resolution and target information update rate of
the proposed continuous waveform are analyzed. After obtaining the receiver operating characteristic (ROC)
curves by Monte Carlo method, under the condition of uniform reverberation background, the difference of
single target detection performance between PAS and CAS is compared. The simulation results show that
the proposed continuous wave has good Doppler resolution, and the echo detection algorithm can significantly
improve single target detection performance under the condition of uniform reverberation background.
Keywords: Continuous active sonar; Orthogonal polyphase codes; Multi-channel; Non-coherent integration;
Receiver operating characteristic curve

2021-08-15 收稿; 2021-10-11 定稿
天津市技术创新引导专项企业科技特派员项目 (21YDTPJC00180), 声场声信息国家重点实验室开放课题 (202002), 国家自然科学基
∗
金项目 (61601322)
作者简介: 颜恒平 (1979– ), 男, 江苏无锡人, 高级工程师, 研究方向: 水声试验方法研究和设备设施开发。
通信作者 E-mail: liudalildl@139.com
†