Channel Modeling and Capacity Analysis for Electromagnetic Wireless Nanonetworks in the Terahertz Band
Channel Modeling and Capacity Analysis for Electromagnetic Wireless Nanonetworks in the Terahertz Band
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DOI：
10.1109/twc.2011.081011.100545
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发表时间：
2011-10-01
影响因子：
10.4
通讯作者：
Akyildiz, Ian F.
中科院分区：
文献类型：
--
作者：
Jornet, Josep Miquel;Akyildiz, Ian F.
纳米技术为生物医学、工业和军事领域的若干应用提供了新的解决方案。在纳米尺度上，纳米机器被认为是最基本的功能单元，能够执行非常简单的任务。纳米机器之间的通信将允许它们以分布式方式完成更复杂的功能。本文综述了分子电子学的最新进展，旨在促进太赫兹波段（0.1-10.0 THz）纳米器件间电磁通信的研究。基于辐射传输理论和分子吸收理论，提出了一种新的太赫兹电磁通信传输模型。该模型考虑了太赫兹波段中的波在非常短的距离内传播时所遭受的总路径损耗和分子吸收噪声。最后，太赫兹波段的信道容量的影响，通过使用该模型为不同的功率分配方案，包括基于飞秒长脉冲的传输方案。结果表明，对于非常短的传输距离，在几十毫米的数量级，太赫兹信道支持非常大的比特率，高达每秒几个太比特，这使得纳米网络的通信模式完全不同。
Nanotechnologies promise new solutions for several applications in the biomedical, industrial and military fields. At the nanoscale, a nanomachine is considered as the most basic functional unit which is able to perform very simple tasks. Communication among nanomachines will allow them to accomplish more complex functions in a distributed manner. In this paper, the state of the art in molecular electronics is reviewed to motivate the study of the Terahertz Band (0.1-10.0 THz) for electromagnetic (EM) communication among nano-devices. A new propagation model for EM communications in the Terahertz Band is developed based on radiative transfer theory and in light of molecular absorption. This model accounts for the total path loss and the molecular absorption noise that a wave in the Terahertz Band suffers when propagating over very short distances. Finally, the channel capacity of the Terahertz Band is investigated by using this model for different power allocation schemes, including a scheme based on the transmission of femtosecond-long pulses. The results show that for very short transmission distances, in the order of several tens of millimeters, the Terahertz channel supports very large bit-rates, up to few terabits per second, which enables a radically different communication paradigm for nanonetworks.