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Modulation and rate adaptation algorithms for terahertz channels

机译：太赫兹通道的调制和速率自适应算法

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摘要

The ever increasing demand for higher wireless data rates has led to the development of new techniques to increase spectrum efficiency. However, the limited bandwidth of the frequency bands that are currently used for wireless communication bounds the maximum data rate possible. In the past few years, researchers have developed new devices that work as Terahertz (THz) transmitters and receivers. The development of these devices and the large available bandwidth of the THz band is a possible solution to this ever increasing demand. However, THz communication is still in its infancy and more research needs to be done to bring THz technology into every day life. This paper considers two specific problems - modulation of terahertz pulses and rate adaptation for terahertz communication systems. We describe a pulse modulation technique where multiple symbols are transmitted in each pulse. The technique is shown to achieve terabit/sec datarates. Subsequently, we examine the problem of rate adaptation which is significant at these frequencies due to the high distance based attenuation. Algorithms are presented to fairly share the channel among multiple users located at different distances from the access point. The research is based on simulations in Matlab and the channel model used is based on our own measurements using a time-domain terahertz system. The channel model is also presented in this paper.
机译：对更高无线数据速率的不断增长的需求导致了提高频谱效率的新技术的发展。但是，当前用于无线通信的频带的有限带宽限制了可能的最大数据速率。在过去的几年中，研究人员开发了可用作太赫兹（THz）发射器和接收器的新设备。这些设备的开发以及太赫兹频段的大可用带宽是解决这一不断增长的需求的可能解决方案。但是，太赫兹通信仍处于起步阶段，需要做更多的研究才能将太赫兹技术带入日常生活。本文考虑了两个特定的问题-太赫兹脉冲的调制和太赫兹通信系统的速率自适应。我们描述了一种脉冲调制技术，其中在每个脉冲中传输多个符号。示出了该技术以实现兆比特/秒的数据速率。随后，我们研究了速率自适应的问题，由于基于距离的高衰减，它们在这些频率上很重要。提出了在距离接入点不同距离的多个用户之间公平共享信道的算法。该研究基于Matlab中的仿真，所使用的信道模型基于我们自己使用时域太赫兹系统进行的测量。本文还介绍了信道模型。

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