基于线性调频扩频的单基站室内定位系统研究

Research on Chirp Spread Spectrum Based Indoor Positioning System with Single AP

基于WLAN、蓝牙等无线信号的室内定位系统在布设与组网阶段需要布设大量的节点,在推广过程中严重受制于布设成本,因而提出了一种基于线性调频扩频(Chirp Spread Spectrum,CSS)信号的单基站室内定位系统及相关定位算法,结合使用线性调频测距方法与自主角度估计方法,测距精度优于1m,测角精度达1.5°,可为地下停车场等人员相对稀疏、定位精度需求相对较低的应用场景提供低成本的覆盖。经过室内停车场场景试验,该室内定位系统可在仅使用单一基站情况下,在约60m半径内提供1~3m的定位精度。

As the large quantity of APs needed for wireless network based indoor positioning systems during deploying has become the greatest drawback of its popularization,a single AP indoor positioning system based on Chirp Spread Spectrum（CSS）is proposed.Combined with Chirp Spread Spectrum ranging method and independent angle estimation method,this positioning system can provide a ranging accuracy better than 1 m and angle estimation accuracy of 1.5 degree,which is suitable and cost efficient for areas with less crowd and low accuracy demand,such as underground parking lot.The system can provide an accuracy of 1~3 min about 60 mradius with single AP in an underground parking lot test.