摘要
WiFi定位是室内定位的方法之一,其观测值主要为WiFi的信号强度(received signal strength indication,RSSI),利用信号强度进行室内定位的方法基本上可以分为两种,一种根据模型计算接收节点与发射节点的距离,估计接收节点的位置;另一种是根据事先采集的信号强度指纹进行空间匹配。通过在不同场景下对两种定位算法的比较,基于信号强度指纹匹配的定位精度明显高于基于估计接收节点的定位精度,但与指纹匹配法相比,位置估计法更加灵活。
Wi-Fi positioning is one of the indoor positioning method,which observations are mainly received signal strength indication（RSSI）.There are two kinds of Wi-Fi positioning methods using received signal strength indication.One is position estimation.The distance between the receiving node and the transmitting node is calculated according to the model,and the position of the receiving node can be estimated.The other is based on pre-collected signal strength for fingerprint matching.The localization accuracy based on the signal strength fingerprint matching is obviously higher than that based on the method of position estimation by comparing two localization algorithms in different scenarios.But the position estimation method is more flexible than the method of fingerprint matching.
出处
《信息技术》
2017年第12期73-75,共3页
Information Technology
基金
国家自然科学基金(41504006
41674034)
关键词
室内定位
Wi-Fi定位
指纹匹配
位置估计
indoor location
Wi-Fi location
lingerprint matching
position estimation
