Abbasi Qammer Hussain, Sani Andrea, Alomainy Akram, Hao Yang
School of Electronic Engineering and Computer Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
IEEE Trans Inf Technol Biomed. 2012 Mar;16(2):221-7. doi: 10.1109/TITB.2011.2177526. Epub 2011 Nov 29.
The paper presents a subject-specific radio propagation study and system modeling in wireless body area networks using a simulation tool based on the parallel finite-difference time-domain technique. This technique is well suited to model the radio propagation around complex, inhomogeneous objects such as the human body. The impact of different digital phantoms in on-body radio channel and system performance was studied. Simulations were performed at the frequency of 3-10 GHz considering a typical hospital environment, and were validated by on-site measurements with reasonably good agreement. The analysis demonstrated that the characteristics of the on-body radio channel and system performance are subject-specific and are associated with human genders, height, and body mass index. Maximum variations of almost 18.51% are observed in path loss exponent due to change of subject, which gives variations of above 50% in system bit error rate performance. Therefore, careful consideration of subject-specific parameters are necessary for achieving energy efficient and reliable radio links and system performance for body-centric wireless network.
本文使用基于并行时域有限差分技术的仿真工具，对无线体域网中特定对象的无线电传播进行了研究并进行了系统建模。该技术非常适合对诸如人体等复杂、非均匀物体周围的无线电传播进行建模。研究了不同数字人体模型对体表无线信道和系统性能的影响。考虑典型医院环境，在3 - 10 GHz频率下进行了仿真，并通过现场测量进行了验证，两者吻合良好。分析表明，体表无线信道的特性和系统性能是特定对象相关的，并且与人类性别、身高和体重指数有关。由于对象的变化，路径损耗指数的最大变化约为18.51%，这使得系统误码率性能的变化超过50%。因此，要实现以人体为中心的无线网络的高能效和可靠无线电链路及系统性能，必须仔细考虑特定对象的参数。
