Terahertz (THz)-band communications are a key enabler for future-generation wireless communication systems that promise to integrate a wide range of data-demanding applications. Recent advances in photonic, electronic, and plasmonic technologies are closing the gap in THz transceiver design. Consequently, prospect THz signal generation, modulation, and radiation methods are converging, and corresponding channel model, noise, and hardware-impairment notions are emerging. Such progress establishes a foundation for well-grounded research into THz-specific signal processing techniques for wireless communications. This tutorial overviews these techniques, emphasizing ultramassive multiple-input–multiple-output (UM-MIMO) systems and reconfigurable intelligent surfaces, vital for overcoming the distance problem at very high frequencies. We focus on the classical problems of waveform design and modulation, beamforming and precoding, index modulation, channel estimation, channel coding, and data detection. We also motivate signal processing techniques for THz sensing and localization.

中文翻译：

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太赫兹通信信号处理技术概述


太赫兹 (THz) 频段通信是未来一代无线通信系统的关键推动因素，有望集成各种数据需求较高的应用。光子、电子和等离子体技术的最新进展正在缩小太赫兹收发器设计的差距。因此，前景太​​赫兹信号生成、调制和辐射方法正在趋同，相应的信道模型、噪声和硬件损伤概念也正在出现。这些进展为无线通信专用太赫兹信号处理技术的基础研究奠定了基础。本教程概述了这些技术，重点介绍了超大质量多输入多输出 (UM-MIMO) 系统和可重构智能表面，这对于克服极高频率下的距离问题至关重要。我们重点关注波形设计和调制、波束成形和预编码、索引调制、信道估计、信道编码和数据检测等经典问题。我们还推动太赫兹传感和定位的信号处理技术。