基于RSS与CSI混合指纹室内定位研究

Indoor location research based on RSS and CSI hybrid fingerprint

接收信号强度指示(RSS)作为一种主流的方案常用于基于测距的定位系统和指纹定位系统。但是,RSS常常受到多径效应及噪声信号的影响,其定位性能并不稳定。近年来,很多商用的Wi Fi设备支持获取物理层的信道状态信息(CSI)。CSI是比RSS能以更细粒度表征信号特性的一种指标。相比RSS,CSI通过对多路子载波信号特征分析,从而尽可能避免多径效应与噪声的影响。CSI为基于Wi Fi的室内定位技术开辟了新的空间,因而被广大研究者所关注。基于以上原因,本文开展了异构无线网络下基于RSS与CSI混合指纹的室内定位方法研究。

The receiving signal strength indicator（ RSS） as a mainstream solution is often used for locating system and fingerprint positioning system based on ranging. However,RSS is often affected by multiple size effects and noise signals,and its location performance is not stable. In recent years,many commercial Wi Fi devices have supported access to the physical layer’s channel status information（ CSI）. CSI is a more fine-grained indicator of signal characteristics than RSS.Compared to RSS,CSI analyses the characteristics of multiple subcarrier signals to avoid the effects of multipath effect and noise. The CSI has opened up new spaces for Wi Fi based indoor location technology,and has been concerned by researchers.For this purpose,this paper carries out the research on the indoor location method based on RSS and CSI hybrid fingerprint.