一种适于浅水定位的超短基线装置与定位方法

An ultra-short baseline device and positioning method suitable for shallow water

摘要:

针对浅水水域水声信号多途效应导致信道衰落,真实时延信号获取难度大的问题,本文研制了一种适用于浅水定位的超短基线装置,并提出一种附有约束条件的互相关时延估计方法。采用脉冲挑选和时延差相位修正方法对目标轨迹进行精确跟踪定位,某湖试实验结果表明,该方法的定位轨迹光滑稳定,野点少,定位精度高。

Abstract:

To address the difficulty of obtaining real time-delay signals due to multipath effect in shallow water, an ultra-short baseline (USBL) device is developed for the object location, and a cross-correlation differential time-delay estimation method with available constraints is proposed for the USBL location in shallow water. Pulse selection and phase correction methods are used to estimate the differential time delay accurately for tracking and locating the object trajectory. The results of a lake experiment show that the trajectory location with the proposed method is smooth and stable, and has less wild points and high accuracy.