超寬頻人體動態無線電通道量測與模型建立

Abstract

本論文提出應用於超寬頻頻帶，人體在持續動作下on-body無線電通道動態特性的觀測研究。on-body動態通道量測在無反射實驗室以及有豐富散射體的一般室內環境，並包含了三種不同的動作情境如原地行走、起立坐下和靜止站立，以及腰部對頭部、胸部、上手臂、手腕四種發射與接收天線對應位置。統計分析包含路徑損耗以及功率延遲分布，結果顯示通道路徑損耗的機率密度分布可以被對數常態分佈所描述。根據統計分析的結果，考慮人體在動作期間的動作情境資訊，如有直視波(Light of sight, LOS)或是無直視波(Non-light of sight, NLOS)，建立有限狀態馬可夫通道模型，描述人體通道的動態特性。模型先以無反射環境量測資料建立，再考慮一般室內環境資料對模型的適用性，建立一個可以應用於不同環境動態人體通道模型。

This paper presents an experimental investigation of the dynamic feature of on-body radio channel based on human body movement for ultra-wide band (UWB). The on-body dynamic channel measurement scenarios includes three repetitive actions such as walking on the spot, standing up and sitting down and standing still at four different receiving antenna locations in anechoic chamber and indoor environment with plenty of scatter multipliers. Statistical analyses, including path loss and power delay profile were conducted. The result indicates that the probability density function of path loss can be well defined by log-normal distribution. Accordingly, a finite-state Markov channel model considering the scenarios of each action likes light of sight (LOS) or non-light of sight (NLOS) is proposed to describe the dynamic characteristic of on-body channel. The model is initially built from the data measured in anechoic chamber, and then verifying the adaptability of data measured in indoor environment.