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WLAN TOA Ranging and GPS Hybrid System for Indoor Navigation

机译:用于室内导航的WLAN TOA测距和GPS混合系统

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Position errors for a GPS standalone solution can exceed200 meters in indoor environments due to limited satelliteavailability, weak signals and multipath. Therefore hybridpositioning methods have been developed integratingother signals and sensors including pseudolites, ultrawideband,cell ID and WLAN fingerprinting with GPS toaid navigation in indoor environments. Service providersusing such hybrid solutions claim location accuracies onthe order of 10 meters in open sky and 50 meters indoors.This paper presents test results obtained by integratingsoftware based 2.4 GHz WLAN Time-of-Arrivalmeasurements with GPS. Reference trajectories wereobtained using conventional surveying, where thekinematic trajectory was formed by moving between presurveyedpoints. Tests were conducted in a high multipathindoor environment with limited satellite availability butwith ranging from multiple WLAN access points to themobile user. Results show that ranges from severaloverlapping WLAN nodes combined with GPSpseudorange measurements can provide five meter orbetter position accuracy in these kinds of indoorenvironments.
机译:GPS独立解决方案的位置误差可能超过 由于卫星数量有限,在室内环境下200米 可用性,微弱的信号和多径。因此混合 集成了多种定位方法 其他信号和传感器,包括伪卫星,超宽带, GPS的小区ID和WLAN指纹识别 在室内环境中进行导航。服务供应商 使用此类混合解决方案要求对 在空中10米的顺序,在室内50米的顺序。 本文介绍了通过综合获得的测试结果 基于软件的2.4 GHz WLAN到达时间 GPS测量。参考轨迹是 使用常规测量获得的 运动轨迹是通过在预先测量之间移动而形成的 点。测试是在高度多路径下进行的 室内环境,卫星可用性有限,但 从多个WLAN接入点到 移动用户。结果显示范围从几个 重叠的WLAN节点与GPS结合 伪距测量可以提供五米或 在这类室内的位置精度更高 环境。

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