Shaban Heba A, Abou el-Nasr Mohamad, Buehrer R Michael
Virginia Polytechnic Institute and State University at Alexandria (VT-MENA), Arab Academy for Science and Technology, Alexandria 1029, Egypt.
IEEE Trans Inf Technol Biomed. 2010 Mar;14(2):284-91. doi: 10.1109/TITB.2009.2037619. Epub 2009 Dec 15.
In this paper, we propose and investigate a low-cost and low-complexity wireless ambulatory human locomotion tracking system that provides a high ranging accuracy (intersensor distance) suitable for the assessment of clinical gait analysis using wearable ultra wideband (UWB) transceivers. The system design and transceiver performance are presented in additive-white-gaussian noise and realistic channels, using industry accepted channel models for body area networks. The proposed system is theoretically capable of providing a ranging accuracy of 0.11 cm error at distances equivalent to interarker distances, at an 18 dB SNR in realistic on-body UWB channels. Based on real measurements, it provides the target ranging accuracy at an SNR = 20 dB. The achievable accuracy is ten times better than the accuracy reported in the literature for the intermarker-distance measurement. This makes it suitable for use in clinical gait analysis, and for the characterization and assessment of unstable mobility diseases, such as Parkinson's disease.
在本文中，我们提出并研究了一种低成本、低复杂度的无线动态人体运动跟踪系统，该系统使用可穿戴超宽带（UWB）收发器，提供适用于临床步态分析评估的高精度测距（传感器间距离）。利用针对人体区域网络的业界公认信道模型，在加性高斯白噪声和实际信道中给出了系统设计和收发器性能。所提出的系统理论上能够在实际人体UWB信道中，在信噪比为18 dB时，在与标记间距离相当的距离上提供误差为0.11 cm的测距精度。基于实际测量，在信噪比 = 20 dB时它能达到目标测距精度。可实现的精度比文献中报道的标记间距离测量精度高出十倍。这使得它适用于临床步态分析，以及用于不稳定运动疾病（如帕金森病）的特征描述和评估。
