A Design for Water Surface Communication System of Ultra Short Base Line Positioning System

Abstract

In order to satisfy the requirement of the underwater acoustic positioning system for offshore oil exploration, a design idea for water surface communication system of ultra short base line (USBL) positioning system. The main function of this design is to achieve high-quality communication with underwater acoustic responders. The hardware adopted JZ4760 and the FPGA of altera as the cores. Gold sequence direct sequence spread-spectrum was used on communication system, while modulation was PSK. An appropriate spread-spectrum synchronization mode was presented for the system. MATLAB-based simulation and experiments show that the system is working reliably.

SBL localization based on Extended Kalman Filter

“…In the early 20th century, the United States invented the first echo sounder based on underwater acoustic technology equipment [6][7]. However, in the 1950s, more countries used underwater acoustics to locate and navigate underwater vehicles [8]. In 2000, the pilot short baseline positioning system of American desert star series was widely used in civil product level, mainly in shore terminals and ships [9].…”

Optimization study of underwater long baseline positioning trajectory

“…Underwater acoustic positioning technology is the core technology of underwater platform navigation. High precision and robust underwater acoustic positioning system can provide accurate location information for underwater equipment [1], which has important research significance.This paper studies the positioning principle of underwater platform, establishes the mathematical model of long baseline positioning [2], studies the basic positioning algorithm and trajectory filtering algorithm, and simulates and analyzes the performance of the algorithm.The positioning accuracy is improved [3]. Long baseline positioning system (LBL) is to deploy three or more base stations under the water, and the distance between each base station is generally between hundreds of meters and thousands of meters.…”

“…Long baseline positioning system (LBL) is to deploy three or more base stations under the water, and the distance between each base station is generally between hundreds of meters and thousands of meters. The latest hipap700 long-range acoustic positioning system is theoretically estimated to have a maximum operating distance of 8000 meters [4], a maximum working water depth of 6000 meters and a positioning accuracy of 12m [5]. Its working mode is generally divided into two types: interrogation response mode and synchronous beacon mode [6].…”