摘要
船舶复杂的舱室结构和运动状态对无线信号会产生多径效应和噪声干扰,基于序列的定位方法(SBL)中定位节点位置序列存在较大误差,从而导致定位精度的下降.针对此问题,文中提出一种基于分级序列的定位方法(HSBL).基于RSSI衰减率模型,并根据RSSI信号衰减率建立分级序列,与阶次序列相结合构建子区域位置序列和定位节点位置序列,使用余弦相似度函数进行序列相似性度量.结果表明:当将锚节点通信范围分3级时定位精度提升了26%,与SBL算法相比,HSBL算法具有更好的定位精度和鲁棒性.
The complex cabin structure and motion state of the ship will cause multipath effect and noise interference to the wireless signal.There is a big error in the position sequence of the positioning nodes in the sequence-based positioning method(SBL),which leads to the decline of the positioning accuracy.To solve this problem,this paper proposed a location method based on hierarchical sequence(HSBL).Based on the RSSI attenuation rate model,a hierarchical sequence was established according to the RSSI signal attenuation rate,and the sub-region position sequence and positioning node position sequence were constructed by combining with the hierarchical sequence,and the cosine similarity function was used to measure the sequence similarity.The results show that when the communication range of anchor nodes is divided into three levels,the positioning accuracy is improved by 26%.Compared with SBL algorithm,HSBL algorithm has better positioning accuracy and robustness.
作者
张志存
刘克中
马杰
曾旭明
陈默子
ZHANG Zhicun;LIU Kezhong;MA Jie;ZENG Xuming;CHEN Mozi(School of Navigation,Wuhan University of Technology,Wuhan 430063,China;Hubei Key Laboratory of Inland Shipping Technology,Wuhan 430063,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2022年第2期366-370,376,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
湖北省技术创新专项重大项目(2017AAA120)
国家自然科学基金(51979216)。
关键词
船舶环境
RSSI衰减率
分级序列
余弦相似度
序列定位
ship environment
RSSI attenuation rate
hierarchical sequence
cosine similarity
sequence localization
