海洋测绘2024，Vol.44Issue(1)：26-30,5.DOI:10.3969/j.issn.1671-3044.2024.01.006
基于声学宽带扩频信号的抗多径测距技术研究
Research on acoustic positioning system ranging technology of anti-multipath based on wideband spread spectrum coding
摘要
Abstract
To study the ranging accuracy of broadband spread spectrum signal based on complicated underwater acoustic channel and improve the anti-multipath performance of underwater acoustic positioning system.This paper take the multipath interference impulse response of BELLHOP model as the foundation of underwater acoustic channel environment and simulate the correlative synchronous ranging of broadband spread spectrum signal through construct different propagation distance and different Marine environment characteristics.An anti-multipath ranging method based on carrier synchronization of broadband spread spectrum signal is proposed in this paper and we use the wideband feature information carried by carrier to carry out correlation synchronization to improve the accuracy of theoretical ranging.Experimental results show that the shallow water multipath channel ranging accuracy can reach the centimeter level in the case of direct sound and without considering the bending of the sound line,channel ranging accuracy can maintain decimeter level in deep water multipath,which effectively improves the anti-multipath effect compared to the baseband synchronization method.It provides theoretical basis for high performance ranging technology of acoustic positioning system.关键词
水声定位/BELLHOP模型/时延测距/抗多径/宽带扩频Key words
acoustic positioning/BELLHOP model/time delay ranging/anti-multipath/wideband spread spectrum分类
天文与地球科学引用本文复制引用
罗宇,王浩,辛明真,程梦迪,张世照,亓家宝..基于声学宽带扩频信号的抗多径测距技术研究[J].海洋测绘,2024,44(1):26-30,5.基金项目
国家自然科学基金(52101386) （52101386）
地理信息工程国家重点实验室、自然资源部测绘科学与地球空间信息技术重点实验室联合资助基金(2022-01-06). （2022-01-06）
