水下无载波超宽带信号波形设计与回波特性

侯欣雨; 陈 航

doi:10.11993/j.issn.1673-1948.2016.05.005

水下无载波超宽带信号波形设计与回波特性

doi: 10.11993/j.issn.1673-1948.2016.05.005

侯欣雨¹,
陈航^1,2

1.
西北工业大学航海学院, 陕西西安, 710072
2.
水下信息处理与控制国家重点实验室, 陕西西安, 710072

基金项目: 中国船舶重工集团公司第705所科学研究资助项目（705JCH2015-4.1）

详细信息

作者简介:
侯欣雨(1990-), 女, 在读硕士, 主要研究方向为信号与信息处理.

中图分类号: TJ630.34; O427.1
计量
- 文章访问数: 988
- HTML全文浏览量: 8
- PDF下载量: 487
- 被引次数: 0
出版历程
- 收稿日期: 2016-06-27
- 修回日期: 2016-07-13
- 刊出日期: 2016-10-20

Waveform Design and Echo Characteristic of Underwater Carrier-free Ultra-Wide Band Signal

HOU Xin-yu¹,
CHEN Hang^1,2

1.
School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an 710072
2.
National Key Lab of Underwater Information Processing and Control, Xi′an 710072

摘要

摘要: 复杂水声环境下, 发射信号波形设计是提高鱼雷自导性能的关键环节之一。文中基于超宽带信号分辨率高、穿透能力强和低占空比等优点, 根据不同位baker码调制的Ricker水声信号波形, 分析了该信号的带宽、频谱和频带内的能量均匀性, 优选出一种4位baker码调制的Ricker信号作为水下无载波超宽带信号。基于这种超宽带信号进行了潜艇目标多亮点的回波特性仿真分析, 得出了不同入射角度、不同脉冲间隔信号波形对目标多亮点回波的影响。仿真结果验证了这种脉冲信号在水下目标探测中的可行性和优良性, 为后续超宽带信号在水下目标探测领域的研究提供参考。
- 超宽带信号 /
- 回波特性 /
- Ricker信号 /
- 目标多亮点
Abstract: The design of signal waveform is very important for improving torpedo homing performance under complex underwater acoustic environment. Ultra-wide band signal has many advantages in target detection, such as high resolution, strong penetrability, and low duty ratio. In this paper, According to the Ricker waveform of underwater acoustic signals modulated by different bit baker codes, the signal′s bandwidth, frequency spectrum and energy uniformity within a frequency band are analyzed, a Ricker signal modulated by a 4 bit baker code is optimized as an underwater carrier-free ultra-wide band signal. Based on this kind of ultra-wide band signal, the echo characteristic simulation analysis of submarine target is carried out, and the influences of incident angle and signal waveform with different pulse interval on the echo of multi-highlight target are obtained. Simulation results verify the feasibility of this kind of pulse signal in underwater target detection, and may provide reference for further research on application of ultra-wide band signal to underwater target detection.
- ultra-wide band signal /
- echo characteristic /
- Ricker signal /
- multi-highlight target

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参考文献(13)

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