超宽带体域网信道测量及传输特性分析

Ultra-wide band wireless body area network channel measurements and modeling

随着通信技术的发展,高速的近距离超宽带无线体域网受到越来越多的重视。该文采用基于频域的无线信道测量平台,对3～5GHz频率范围的人体范围无线宽带信道进行测量,其中测量环境分为办公室和静室环境,人体模型包括3种不同体型;获得的测量数据通过统计建模,得到了路径损耗模型和功率群延迟模型。对标准模型与本文模型的仿真结果进行比较表明:该模型在平均附加时延、均方根时延扩展、峰值20dB内多径数目等方面更加符合实测数据。

With the development of communication technology, high-speed short-range ultra wide band wireless body area networks have received increasing attention. This paper used frequency domain based wireless channel measurement platform to measure three types of human body channel in both the office and anechoic environments within the 3 - 5 GHz frequency. The statistical analyses gave：a wireless channel model with the path loss and power delay profile. Simulations show that this model is more accurate than the standard models for the mean excess delay spread, the root-mean-square （RMS） delay spread, and the number of multi-paths in the 20 dB ranges.