摘要
基于RSSI的WiFi指纹定位算法离线建立指纹数据库阶段受AP个数影响,因此AP个数也将影响到指纹定位算法精度。为了探究AP个数对定位精度的影响,文中在室内环境下进行实验,选取不同的AP进行基于RSSI的WiFi指纹定位实验和分析,定位精度和可靠性作为定位结果的衡量指标。实验结果表明:在单个办公室内,5~6个AP时定位精度较高且定位结果可靠性达到最高。
The off-line phase which uses WiFi positioning algorithm based on RSSI fingerprint is affected by the AP number,so the AP number will also affect the fingerprint position algorithm precision.To explore the effect of AP number on positioning precision,this paper conducts an positioning experiment in indoor environment,and analyzes the affect of different number of AP on positioning estimation,by taking the positioning precision and reliability as the indicators of position results.The results indicate that the number of AP is 5or 6which can get high precision and the highest reliability,and be more reasonable in indoor environment.
出处
《测绘工程》
CSCD
2017年第2期33-36,共4页
Engineering of Surveying and Mapping
基金
国家自然科学基金资助项目(41374011
41174010)
江西省数字国土重点实验室开放研究基金资助项目(DLLJ201605)
关键词
WiFi指纹定位
AP
RSSI
位置估计
可靠度检验
WiFi fingerprint position
access point
received signal strength indicator
position estimation
reliability test
