协同定位网络测距性能探究  

Discussion on ranging performance of collaborative positioning network

作　　者：仇凯 王前 QIU Kai;WANG Qian(School of Earth Science and Engineering,Hohai University,Nanjing 210000,China)

机构地区：[1]河海大学地球科学与工程学院,南京210000

出　　处：《导航定位学报》2023年第2期186-195,共10页Journal of Navigation and Positioning

摘　　要：针对协同定位方法带来的网络节点之间争用信道的问题,提出一种适用于多节点协同定位网络的测距方法:立足载波侦听多路访问/冲突避免(CSMA/CA)协议在通信网络和协同定位网络的不同,通过减少单次测距时间、避免重复测距、减少节点竞争接入信道的次数,优化测距过程;并提出一种时延修正算法对传播时延进行估计和修正。实验结果表明,该方法可以在有效提高整个网络测距频度的同时,有效降低传播时延对于测距精度的影响,提高测距精度。Aming at the problem of competing channels between nodes in the network brought by the co-location method,the paper proposed a ranging method suitable for multi-node co-location network:based on the difference between communication networks and co-location networks for carrier sense multiple access with collision avoid(CSMA/CA)protocol,the ranging process was improved by reducing the single ranging time,avoiding repeated ranging,and reducing the number of nodes competing to access channels;and a delay correction algorithm was put forwarded to estimate and correct the propagation delay.Experimental result showed that the proposed method could effectively not only improve the ranging frequency of the entire network,but also reduce the influence of propagation delay on the ranging accuracy,and improve the ranging accuracy.

关 键 词：载波侦听多路访问/冲突避免(CSMA/CA)协议 协同定位网络 测距精度 测距频度 马尔可夫模型 

分 类 号：P228[天文地球—大地测量学与测量工程]