重庆邮电大学学报（自然科学版）2017，Vol.29Issue(6)：744-750,7.DOI:10.3979/j.issn.1673-825X.2017.06.006
改进的蜂窝网室内定位匹配算法
Improved indoor localization matching algorithm for cellular networks
摘要
Abstract
Due to the dynamic fading characteristics of wireless channel,the localization performance will be dramatically deteriorated in cellular network.Therefore,a principal components analysis (PCA) based subspace matching algorithm for indoor localization within cellular networks is proposed,which not only guarantees the real-time localization requirement,but also effectively eliminates the large error points for the sake of accuracy enhancement.Specifically,the off-line fingerprint database is constructed firstly according to the positional characteristics caused by the non-line-of-sight propagation of the wireless cellular signal.Then the sub-fingerprint database is extracted in line with the received signal.Next,PCA algorithm is utilized to reduce the dimension of both on-line received signal strength and sub-fingerprint database,which then forms a new subspace.After that,the weighted K nearest neighbors (WKNN) is adopted for multiple-target localization.Finally,the targets are screened based on 3σ rule in order to determine the final location.Experimental results show that the proposed approach can effectively eliminate the outliers and thus improve the overall on-line positioning performance under the premise of ensuring the real-time positioning.关键词
蜂窝网/子指纹库/子空间匹配/PCA/3sigma准则Key words
cellular networks/sub-fingerprint database/subspace matching/PCA/3sigrna rule分类
信息技术与安全科学引用本文复制引用
田增山,舒月月,刘仪瑶,李玲霞..改进的蜂窝网室内定位匹配算法[J].重庆邮电大学学报（自然科学版）,2017,29(6):744-750,7.基金项目
国家自然科学基金(61301126) （61301126）
重庆市基础与前沿研究计划项目(cstc2013jcyjA40041,cstc2015jcyjBX0065) （cstc2013jcyjA40041,cstc2015jcyjBX0065）
重庆邮电大学青年科学研究项目(A2013-31)The National Natural Science Foundation of China (61301126) （A2013-31）
The Fundamental and Frontier Research Project of Chongqing (cstc2013jcyjA40041,cstc2015jcyjBX0065) （cstc2013jcyjA40041,cstc2015jcyjBX0065）
The Young Science Research Program of Chongqing University of Posts and Telecommunications(A2013-31) （A2013-31）
