arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2403.05970cs.ITeess.SPmath.IT
收藏

面向全息通信的电磁混合波束赋形

Electromagnetic Hybrid Beamforming for Holographic Communications

Ran Ji, Chongwen Huang, Xiaoming Chen, Wei E. I. Sha, Linglong Dai, Jiguang He, Zhaoyang Zhang, Chau Yuen, Mérouane Debbah

AI总结:

本文提出基于三维超方向性全息天线阵列的电磁混合波束赋形方案,通过联合优化模拟激励电流与数字预编码,消除方向图畸变并实现全空间可编程聚焦,仿真显示和速率增益超过传统算法150%。

摘要:

众所周知,商用基站天线阵列存在固有的辐射方向图畸变,通常需要三个天线扇区才能覆盖整个空间。为消除方向图畸变并进一步增强波束赋形性能,我们提出了一种基于三维(3D)超方向性全息天线阵列的电磁混合波束赋形(EHB)方案。具体而言,EHB由天线激励电流向量(模拟波束赋形)和数字预编码矩阵组成,其中模拟波束赋形的实现涉及实时调整辐射方向图,使其适应动态无线环境。同时,数字波束赋形基于模拟波束赋形的信道特性进行优化,以进一步提高通信系统的可达速率。我们还建立了一个包含阵列辐射方向图和互耦效应的电磁信道模型,以评估所提方案的收益。仿真结果表明,我们提出的采用3D全息阵列的EHB方案实现了相对平坦的超方向性波束赋形增益,并允许在整个空间域内可编程地调整聚焦方向。此外,仿真结果还验证了与传统波束赋形算法相比,所提方案实现了超过150%的和速率增益。

英文摘要:

It is well known that there is inherent radiation pattern distortion for the commercial base station antenna array, which usually needs three antenna sectors to cover the whole space. To eliminate pattern distortion and further enhance beamforming performance, we propose an electromagnetic hybrid beamforming (EHB) scheme based on a three-dimensional (3D) superdirective holographic antenna array. Specifically, EHB consists of antenna excitation current vectors (analog beamforming) and digital precoding matrices, where the implementation of analog beamforming involves the real-time adjustment of the radiation pattern to adapt it to the dynamic wireless environment. Meanwhile, the digital beamforming is optimized based on the channel characteristics of analog beamforming to further improve the achievable rate of communication systems. An electromagnetic channel model incorporating array radiation patterns and the mutual coupling effect is also developed to evaluate the benefits of our proposed scheme. Simulation results demonstrate that our proposed EHB scheme with a 3D holographic array achieves a relatively flat superdirective beamforming gain and allows for programmable focusing directions throughout the entire spatial domain. Furthermore, they also verify that the proposed scheme achieves a sum rate gain of over 150% compared to traditional beamforming algorithms.

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。

↑