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arXiv 2603.09282eess.SP
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依赖低分辨率ADC的两阶段混合收发机设计用于部分连接的多用户太赫兹(THz)MIMO系统

Two-Stage Hybrid Transceiver Design Relying on Low-Resolution ADCs in Partially Connected MU Terahertz (THz) MIMO Systems

Indian Institute of Technology Kanpur(印度坎普尔理工学院)

Abhisha Garg, Akash Kumar, Suraj Srivastava, Aditya K. Jagannatham, Lajos Hanzo

AI总结:

本文提出了一种基于低分辨率ADC的两阶段混合收发机设计,通过优化波束成形技术减少双宽带效应,提升了太赫兹MIMO系统的谱效率。

摘要:

为低分辨率多用户(MU)太赫兹大规模多输入多输出(MIMO)系统设计了一种两阶段混合收发机,考虑了基站(BS)的 partially connected 架构。由于太赫兹频段具有高带宽和高天线数量,其受到空间宽带和频率宽带效应的联合影响,称为双宽带效应。为解决这一不利现象,我们通过结合吸收、反射和自由空间损耗,严格建模每个子阵列对应的每个用户THz MIMO信道。随后提出了一种新的波束成形技术,仅使用少量真正的时延线(TTD)来消除波束分裂效应,这是空间宽带效应在频域中的表现。我们的仿真结果表明,与现有最先进技术相比,谱效率提高了约13%。

英文摘要:

A two-stage hybrid transceiver is designed by considering a partially connected architecture at the base station (BS) for a low-resolution multi-user (MU) THz massive multiple input multiple output (MIMO) system. Due to its high bandwidth coupled with a high number of antennas, the THz band suffers from the deleterious spatial-wideband and frequency-wideband effects jointly termed as the dual-wideband effect. To address this undesired phenomenon, we rigorously model the THz MIMO channel at each subarray corresponding to each user by incorporating the absorption, reflection, and free-space losses. Subsequently, a novel beamforming technique is proposed that employs only a few true time delay (TTD) lines for eliminating the beam-split effect, which is the manifestation of the spatial-wideband effect in the frequency domain. Our simulation results demonstrate a performance improvement of around 13% in terms of spectral efficiency over the existing state-of-the-art techniques.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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