Modeling the effect of human body on TOA ranging for indoor human tracking with wrist mounted sensor
Modeling the effect of human body on TOA ranging for indoor human tracking with wrist mounted sensor
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发表时间：
2013-06
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通讯作者：
Y. Geng;Jie He;Haokun Deng;K. Pahlavan
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作者：
Y. Geng;Jie He;Haokun Deng;K. Pahlavan
在基于TOA的室内人体跟踪系统中，目标传感器通常安装在人体表面，这可能会引起非视距问题，并产生较大的测距误差。然而，在以往的研究中，尚未见对人体对TOA测距结果影响的分析。本文从几何信息、系统带宽和信噪比的影响等方面详细分析了人体对TOA测距的影响。考虑了蠕变波在人体表面周围的角度，建立了基于办公环境测量的TOA测距误差统计模型。本文腕部模型通过将测量场景划分为视距（LOS）和非视距（NLOS）场景，将多径现象引起的测距误差和人体遮挡引起的测距误差分离开来。我们在之前的工作中已经将腕部模型与胸部模型进行了比较，验证了该腕部模型的性能。
In TOA based indoor human tracking system, target sensors are often mounted to the surface of human body which may raise non-line-of-sight (NLOS) issues and give raise to significant ranging error. However, analysis on the influence of human body on TOA ranging result has never been seen from previous researches. In this paper, we focus on geometrical information, effect of system bandwidth and signal to noise ratio and provide a detailed analysis on the effect of human body on TOA ranging. Perspective of creeping wave around the surface of human body has been taken into consideration and a statistical TOA ranging error model has been built based on measurements in office environment. The wrist model in this paper separates the ranging error caused by multi path phenomenon and ranging error caused by blockage of human body by partitioning the measurement scenario into line-of-sight (LOS) and NLOS scenario. Comparison has been made between wrist model and chest model in our previous work and the performance of this wrist model has been validated.