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Large-array underwater wideband spread spectrum beacon navigational positioning system and method based on time synchronization

A time synchronization, navigation and positioning technology, which is applied in satellite radio beacon positioning systems, positioning, radio wave measurement systems, etc., can solve the problem of low precision of direction finding, insufficient accuracy of ranging delay, and large amount of calculation of acoustic beacon signals And other issues

Active Publication Date: 2014-08-27
江苏中海达海洋信息技术有限公司
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AI Technical Summary

Problems solved by technology

Due to the large amount of calculation of the encoding and decoding method of the acoustic beacon signal in the existing system, the time delay accuracy of ranging is not enough, the anti-interference ability of multipath processing is not strong, and the direction finding accuracy is not high.

Method used

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  • Large-array underwater wideband spread spectrum beacon navigational positioning system and method based on time synchronization
  • Large-array underwater wideband spread spectrum beacon navigational positioning system and method based on time synchronization
  • Large-array underwater wideband spread spectrum beacon navigational positioning system and method based on time synchronization

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Embodiment Construction

[0026] The large array underwater wideband spread spectrum beacon navigation and positioning system based on time synchronization such as figure 1 As shown, the system uses high-precision time synchronization technology to synchronize the positioning array buoys and acoustic beacons. Transmit spread-spectrum underwater acoustic signals at regular intervals after strict time-synchronized acoustic signaling. After receiving the spread-spectrum signal, the positioning buoy base array obtains the position of the acoustic beacon through signal calculation, distance calculation and position calculation. Each technical link and method of system processing will be described in detail below.

[0027] 1. High precision time synchronization

[0028] The underwater broadband spread spectrum beacon positioning system based on time synchronization uses high-precision time synchronization technology and has great technical advantages.

[0029] When the traditional responding underwater ac...

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Abstract

The invention discloses a large-array underwater wideband spread spectrum beacon navigational positioning system and method based on time synchronization, and time synchronization is carried out on a positioning array buoy and a sound beacon through a high-accuracy time synchronization technology. The sound beacon subjected to strict time synchronization emits spread spectrum water sound signals in a timing mode. After the positioning array buoy receives the spread spectrum signals, the position of the sound beacon is obtained through signal resolution, distance calculation and position resolution. The position of the sound beacon is obtained after the coordinates are worked out, the movement track of the sound beacon can be drawn out through continuous response, resolving and positioning, and accurate positioning and navigation of underwater equipment are achieved.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic positioning, in particular to a large array underwater broadband spread spectrum beacon navigation and positioning system and method based on time synchronization. Background technique [0002] Underwater positioning and navigation is the basic support technology for all ocean development activities and marine high-tech development. Ocean exploration, ocean engineering, environmental monitoring and underwater military activities all require accurate positioning and navigation of underwater equipment. [0003] The main means of traditional underwater target positioning and tracking is the underwater acoustic positioning method which relies on geometric principles. According to the length of the measurement baseline, the underwater acoustic positioning system can be divided into ultra-short baseline system (USBL), short baseline system (SBL) and long baseline system (LBL). Among them, ...

Claims

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Application Information

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IPC IPC(8): G01S5/26G01S19/42
CPCG01S5/22G01S19/05
Inventor 罗宇施剑
Owner 江苏中海达海洋信息技术有限公司
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