摘要
多正交信号水下导航系统的水下信标位置校准是提高导航精确度的一个关键环节。信标位置校准就是位置估计的过程,论文从建立位置估计误差模型开始,推导了校准过程中位置估计的克拉美-罗下限(Cramer-Rao Lower Bound,CRLB)。利用推导的CRLB评价不同航迹的位置估计性能,仿真计算表明"⊕"字型是位置校准路径的较佳选择。通过CRLB与系统测量设备的参数的关系,预见达到位置校准精度需求所需的设备精度,指导选择测量设备的参数。
Position calibration of beacon is a key link to the multi-orthogonal signals underwater navigation system.Position calibration of beacon is a process of position estimation,this text starts with building a model of position estimation’s errors,and then the Cramer-Rao Lower Bound(CRLB)of position estimation is deduced.Evaluating the different performance of position estimation with different traces through the CRLB,which has derived.Through the simulation calculating showes that ‘⊕’ font as position calibrated route is a better choice.With the relationship of CRLB and the parameters of system’s measuring equipment,the accuracy of equipment needed to achieve accuracy requirements of position calibration is foreseed,thus conducting to choose the parameters of measuring equipment.
作者
郭锦标
张森
GUO Jinbiao;ZHANG Sen(Naval University of Engineering,Wuhan 430033)
出处
《舰船电子工程》
2019年第4期143-147,共5页
Ship Electronic Engineering
关键词
位置校准
模型建立
CRLB
路径选择
测量设备参数选择
position calibration
model establishment
CRLB
route selection
parameters selection of measuring equipment
