水下窄脉冲超宽带信号的传播特性仿真

Simulation of Propagation Properties of Underwater Narrow Pulse and UWB Signal

摘要:

超宽带信号具有分辨率高、截获概率低、穿透能力强等优点,将在水下目标探测、定位及通信等领域具有良好的应用前景;基于水下等离子体声源提出了窄脉冲超宽带信号产生方法,建立了以传播损失和海洋环境噪声为主要影响因素的超宽带脉冲传播信道模型；结合湖试实测数据,利用Matlab仿真软件和Welch谱分析法,仿真分析了不同频率的超宽带脉冲在水下传播不同距离后的功率谱密度以及传播特性;研究成果对水下等离子体超宽带脉冲的工程应用具有重要的参考价值,同时对水下等离子体超宽带脉冲声源的设计和研制也有一定的借鉴意义。

Abstract:

Ultra Wide Band(UWB) signal has the advantages of high resolution, low intercept probability, strong penetration ability, and has a good prospect of application in the fields including underwater target detection, localization and communication. This paper presents a generation method of UWB pulse based on the underwater plasma sound source, and establishes the communication channel model of UWB pulse based on the main influence factors including propagation loss and marine environmental noise;Combined with the lake trial data, using Matlab simulation software and Welch spectrum analysis method, the Power Spectrum Density (PSD) of different frequency of UWB pulse propagating to different distances has been studied. The study results have an important reference value to engineering application of underwater plasma UWB pulse, and also have a certain reference significance to design and development of underwater plasma UWB pulse sound source.