| 郭英歌,陈晶晶,王润田.混沌序列在深海多波束高Ping发射中的应用[J].声学技术,2021,40(6):763~767 |
| 混沌序列在深海多波束高Ping发射中的应用 |
| Application of chaotic sequence in deep sea multi-beam and multi-Ping transmission |
| 投稿时间：2020-06-02 修订日期：2020-07-03 |
| DOI：10.16300/j.cnki.1000-3630.2021.06.004 |
| 中文关键词: 混沌序列 混叠分离 相关性 深海探测 |
| 英文关键词: chaotic sequence overlap separation correlation property deep sea exploration |
| 基金项目:中国科学院声学所英才计划(QNYC201827)。 |
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| 中文摘要: |
| 基于波束形成方法的相控发射可以向不同方向以小延时连续高Ping率发射信号，由于海底底质分层结构的变化，在接收端极易发生回波信号混叠。提出了使用混沌序列克服这一问题，建立了混沌序列筛选流程及编码模型；分析了Logistic序列、Tent序列及Chebyshev序列的相关特性，确定了Chebyshev序列在三者中相关性能最好。使用Chebyshev序列进行调频生成序列，并进行了仿真和水池实验，验证了混沌调频编码信号对混叠信号具有良好的分离能力。 |
| 英文摘要: |
| Phased transmission based on beamforming method can transmit signals in different directions with small delay and continuous high Ping-rate. Due to the change of the layered structure of seafloor sediments, the echo signal aliasing effect is easy to occur at the receiving end. In this paper, chaotic sequence is proposed to solve this problem, and the screening process and coding model of chaotic sequence are established. The correlation characteristics of Logistic sequence, Tent sequence and Chebyshev sequence are analyzed, and it is determined that Chebyshev sequence has the best correlation performance among them. Chebyshev sequence is used to generate frequency modulation sequence, and the simulation and pool experiments are carried out to verify the effective separation ability of chaotic frequency modulation coding signal to echo signal aliasing. |
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