计算机技术与发展2018，Vol.28Issue(3)：54-59,6.DOI:10.3969/j.issn.1673-629X.2018.03.011
基于LANDMARC的室内定位算法改进
Improved Indoor Location Algorithm Based on LANDMARC
摘要
Abstract
In the field of wireless communications,LANDMARC is one of the most widely used indoor localization algorithms due to its low capital cost.However,in the actual application,because of the discreteness generated by RFID reader's reading numerical value,abnor-mal correlation degree exists in the calculation,which seriously influences the positioning stability.At the same time,under the influence of the multipath effect,deviation exists in signal strength value in the process of positioning by LANDMARC,which is easy to produce larger positioning error.For this,we propose an improved LANDMARC where selfrepairing mechanism is introduced to the process in the origi-nal algorithm,which can be divided into two phases,namely,relational degree repairing and coordinate repairing.After the correlation cal-culation is completed,repairing value α will be generated in the correlation repairing phase,to replace the correlation degree abnormal val-ue which leads to disorder of positioning process,ensuring the stability of the algorithm;and the coordinate repairing phase,after obtaining target's theory position,will generate repairing value β by the mean deviation value of nearest neighbors label,to modify the theory loca-tion of target label in order to reduce algorithm positioning error.The simulation shows that the improved algorithm can effectively im-prove the positioning accuracy,and at the same time enhance the positioning stability,making LANDMARC have ability to repair itself.关键词
LANDMARC/RFID/室内定位/自修复机制Key words
LANDMARC/RFID/indoor localization/self-healing mechanism分类
信息技术与安全科学引用本文复制引用
彭慧珺,时宗胜,孙知信..基于LANDMARC的室内定位算法改进[J].计算机技术与发展,2018,28(3):54-59,6.基金项目
国家自然科学基金(61373135,61672299) （61373135,61672299）
