Tensor Modalization-Based Holographic MIMO Channel Estimation

IF 3.7 3区 计算机科学 Q2 TELECOMMUNICATIONS
Shouliang Du;Liyang Lu;Zhaocheng Wang
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引用次数: 0

Abstract

To capture the essence of electromagnetic propagation in arbitrary scattering, the holographic MIMO (HMIMO) channel is usually modeled by a Fourier plane-wave series expansion. HMIMO channel estimation, whose mathematical formulation is significantly varied, reminiscent of conventional sparse recovery solutions may result in unprecedented challenges. In this letter, we propose a tensor modalized channel estimation approach for efficient holographic communications. Specially, Fourier plane wave-based channel is formulated as a 2-mode tensor by jointly employing the physical dimensions of the transmitter and the receiver, enabling the extraction of high-dimensional electromagnetic characteristics. The channel estimation problem is further modeled as a 3-mode sparse tensor reconstruction issue by exploiting spatial characteristics of wireless channels, wherein an additional tensor dimension is added for the information union of various channel slices. Tensor compressive sampling matching pursuit (TCoSaMP) is elaborated based on a multiple selection mechanism, with theoretical guarantees derived from the perspective of a high-dimensional tensor. Furthermore, detailed complexity analysis demonstrates the efficiency of TCoSaMP. Simulation results validate that the proposed method offers improvements in both accuracy and computational efficiency.
基于张量模态的全息MIMO信道估计
为了捕捉任意散射下电磁传播的本质,全息MIMO (HMIMO)通道通常采用傅立叶平面波级数展开来建模。HMIMO信道估计与传统的稀疏恢复方法一样,其数学公式变化很大,可能会带来前所未有的挑战。在这封信中,我们提出了一种有效全息通信的张量模化信道估计方法。特别地,傅立叶平面波通道通过联合利用发射器和接收器的物理尺寸将其表述为2模张量,从而能够提取高维电磁特性。利用无线信道的空间特征,将信道估计问题进一步建模为一个3模稀疏张量重建问题,其中增加了一个额外的张量维,用于各信道切片的信息联合。张量压缩采样匹配追踪(TCoSaMP)基于多重选择机制,从高维张量的角度给出了理论保证。此外,详细的复杂性分析表明了TCoSaMP的有效性。仿真结果表明,该方法在精度和计算效率上均有提高。
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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来源期刊
IEEE Communications Letters
IEEE Communications Letters 工程技术-电信学
CiteScore
8.10
自引率
7.30%
发文量
590
审稿时长
2.8 months
期刊介绍: The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.
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