Terahertz Channel Model and Link Budget Analysis for Intrabody Nanoscale Communication
Terahertz Channel Model and Link Budget Analysis for Intrabody Nanoscale Communication
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DOI：
10.1109/tnb.2017.2718967
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发表时间：
2017-09-01
影响因子：
3.9
通讯作者：
Johari, Pedram
中科院分区：
文献类型：
--
作者：
Elayan, Hadeel;Shubair, Raed M.;Johari, Pedram
在人体内运行的纳米设备为医疗保健领域开辟了新的前景。体内无线纳米传感器网络（iWNSNs）将导致从体内健康监测到药物输送系统的大量应用。随着微型等离子体信号源、天线和探测器的发展，体内纳米器件之间的无线通信有望在太赫兹波段（0.1-10太赫兹）和光学频率（400-750太赫兹）上实现。这一结果激发了对影响电磁信号在人体内传播的现象的分析。本文建立了一种用于iwnsn体内通信的严格信道模型。总路径损耗是通过考虑传播波的传播、人体组织的分子吸收以及大小身体颗粒的散射的综合效应来计算的。通过电磁波传播仿真验证了分析结果。此外，本文还提供了在人体内运行的纳米器件之间进行链路预算分析所需的第一个框架。这种分析是通过考虑发射器功率，介质路径损耗和接收器灵敏度来进行的，其中太赫兹和光子器件都被考虑在内。体内太赫兹和光频传播的整体衰减模型有助于iwnsn的精确设计和实际部署。
Nanosized devices operating inside the human body open up new prospects in the healthcare domain. Invivo wireless nanosensor networks (iWNSNs) will result in a plethora of applications ranging from intrabody health-monitoring to drug-delivery systems. With the development of miniature plasmonic signal sources, antennas, and detectors, wireless communications among intrabody nanodevices will expectedly be enabled at both the terahertz band (0.1-10 THz) as well as optical frequencies (400-750 THz). This result motivates the analysis of the phenomena affecting the propagation of electromagnetic signals inside the human body. In this paper, a rigorous channel model for intrabody communication in iWNSNs is developed. The total path loss is computed by taking into account the combined effect of the spreading of the propagating wave, molecular absorption from human tissues, as well as scattering from both small and large body particles. The analytical results are validated by means of electromagnetic wave propagation simulations. Moreover, this paper provides the first framework necessitated for conducting link budget analysis between nanodevices operating within the human body. This analysis is performed by taking into account the transmitter power, medium path loss, and receiver sensitivity, where both the THz and photonic devices are considered. The overall attenuation model of intrabody THz and optical frequency propagation facilitates the accurate design and practical deployment of iWNSNs.