Multi-user Interference Modeling and Experimental Characterization for Pulse-based Terahertz Communication

Proceedings of the 3rd ACM International Conference on Nanoscale Computing and Communication Pub Date : 2016-09-28 DOI:10.1145/2967446.2967462

Z. Hossain, S. Vedant, Carley R. Nicoletti, J. Federici

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引用次数: 3

Abstract

The transmission of one-hundred-femtosecond-long pulses by following an on-off keying modulation spread in time has been recently proposed as a way to enable Terahertz (THz)-band (0.1-10 THz) communications over short distances. The transmission of ultra-short pulses minimizes the probability of collisions due to the very small time that the channel is occupied by each user. However, given that many of the envisioned applications of THz-band communications involve very large node densities, multi-user interference results unavoidably. In this paper, a stochastic model of multi-user interference is developed and experimentally validated. The model takes into account the fact that the interference power at the receiver is not a combination of the received powers from the individual nodes, rather the power of the combination of the signal amplitudes. For this, first, the probability density function (PDF) of the interference generated by one interfering node at the receiver is obtained starting from the PDFs of the pulse received energy and the PDF of the pulse shape. Then, the model is extended to account for multiple nodes which can constructively or destructively interfere. Finally, the developed model is experimentally validated and numerical results are provided.

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基于脉冲的太赫兹通信多用户干扰建模与实验表征

最近提出了一种通过在时间上遵循开关键控调制扩展来传输100飞秒长的脉冲的方法，该方法可以实现太赫兹(THz)波段(0.1-10太赫兹)短距离通信。由于每个用户占用信道的时间非常短，因此超短脉冲的传输将碰撞的概率降至最低。然而，考虑到许多设想的太赫兹波段通信应用涉及非常大的节点密度，不可避免地会产生多用户干扰。本文建立了多用户干扰的随机模型，并进行了实验验证。该模型考虑到接收器的干扰功率不是来自各个节点的接收功率的组合，而是信号幅度组合的功率。为此，首先从接收到的脉冲能量的概率密度函数和脉冲形状的概率密度函数出发，得到接收机上一个干扰节点产生的干扰的概率密度函数(PDF)。然后，将模型扩展到多个节点，这些节点可以产生建设性或破坏性干扰。最后，对所建立的模型进行了实验验证，并给出了数值结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 3rd ACM International Conference on Nanoscale Computing and Communication

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