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首页> 外文期刊>Instrumentation and Measurement, IEEE Transactions on >Indoor TOA Error Measurement, Modeling, and Analysis
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Indoor TOA Error Measurement, Modeling, and Analysis

机译：室内TOA误差测量，建模和分析

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摘要

This paper presents a comprehensive investigation on the error characteristics of time-of-arrival (TOA) measurements obtained from positioning systems in indoor environments where rich multipath and nonline-of-sight propagation exist. By careful analysis of the measured data from three different sets of measurements, a model for the range errors is developed. The model has two components, one associated with the TOA measurement in the receiver and another associated with the delay excesses accumulated along the propagation path. By modeling multipath signals mathematically, and application of the central limit theorem, it is shown that statistical shape of the leading edge of a received pulse is essentially independent of the details of the scattering environment. Application of this statistical shape of the leading edge allows estimates of the statistical distribution of the TOA measurements to be calculated, either analytically or numerically from simulations. The second component of the delay excess is a model based on the number of walls along the path. Statistical performance based on this combined model is shown to be in good agreement with measured data collected from three different systems that have different RF frequencies, signal bandwidths, and TOA detection algorithms. The insights afforded by the theory assists in the design of more accurate positioning systems.
机译：本文对从存在大量多径和非视距传播的室内环境中的定位系统获得的到达时间（TOA）测量的误差特性进行了全面研究。通过仔细分析来自三组不同测量值的测量数据，可以开发出范围误差模型。该模型具有两个组件，一个与接收机中的TOA测量相关，另一个与沿传播路径累积的延迟过量相关。通过数学建模多径信号并应用中心极限定理，可以证明接收脉冲前沿的统计形状基本上与散射环境的细节无关。前沿的这种统计形状的应用使得可以从模拟中解析地或数值地计算TOA测量值的统计分布的估计。延迟超额的第二部分是基于沿路径的墙数的模型。结果表明，基于此组合模型的统计性能与从具有不同RF频率，信号带宽和TOA检测算法的三个不同系统收集的测量数据非常吻合。该理论提供的见解有助于设计更精确的定位系统。

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