文章摘要
郭璇,郭英歌,王润田.深海声探测中伪随机编码信号的仿真研究[J].声学技术,2019,38(1):46~50
深海声探测中伪随机编码信号的仿真研究
Simulation of pseudo-random coded signals for the acoustic detection in deep-sea
投稿时间:2018-02-06  修订日期:2018-03-28
DOI:10.16300/j.cnki.1000-3630.2019.01.007
中文关键词: 伪随机序列  编码信号  深海探测  回波识别  波达时间定位
英文关键词: pseudo-random sequence  coded signal  deep sea exploration  echo recognition  TOA (time-of-arrival) location
基金项目:中国科学院声学研究所率先计划项目(SXJH201610);上海市科委科研计划项目(16DZ1205300)
作者单位E-mail
郭璇 中国科学院声学研究所东海研究站, 上海 201815
中国科学院大学, 北京 100049 
guoxuan167@163.com 
郭英歌 中国科学院声学研究所东海研究站, 上海 201815  
王润田 中国科学院声学研究所东海研究站, 上海 201815  
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中文摘要:
      目前国际上正在使用多脉冲(MultiPing)探测方式来解决深海探测中探测效率不高的问题,但可能存在回波识别和波达时间定位的问题,提出了利用伪随机编码信号的解决方法。以6000 m深海海底探测为研究对象,设计发射不同编码信号,对其回波识别和定位进行了仿真和比较,同时对不同编码类型的回波识别性能随噪声变化情况进行了讨论。Walsh码拥有更加出色的回波识别性能,但在波达时间定位方面易出现误差,同时随着噪声的增强,回波识别性能明显下降;m序列拥有出色的波达时间定位性能,但回波识别性能不如Walsh码;Gold码在回波识别性能和波达时间定位性能方面有着较好的平衡表现。
英文摘要:
      At present, the MultiPing detection method is being used to solve the problem of low detection efficiency in deep sea exploration, but there may be some problems in echo recognition and TOA (time-of-arrival) location. In the paper a solution using pseudo-random coded signals is proposed. Taking 6000 m deep sea bottom detection as the study object, different coded signals are designed and transmitted, and their echo recognition and location are simulated and compared. At the same time, the variations of echo recognition performance of different coding types with noise are discussed. The study shows that the Walsh code has better performance of echo recognition, but errors are easy to occur in TOA location, and the performance of the echo recognition is obviously decreased with the increase of noise. The m sequence has excellent performance of TOA location,, but the performance of echo recognition is not as good as that of Walsh code. The Gold code has a good balance between echo recognition performance and TOA location performance.
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