面向超大规模平面阵列的混合场干扰分析

周超; 游昌盛

doi:10.12263/DZXB.20260555

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面向超大规模平面阵列的混合场干扰分析

更新时间：2026-07-29

- 面向超大规模平面阵列的混合场干扰分析
- Interference Analysis in Mixed-field Communications with Extremely Large-scale Planar Arrays
- 电子学报 2026年页码：1-8
- 作者机构：
  
  南方科技大学电子与电气工程系，广东深圳 518055
- 作者简介：
  
  周超男，1999年7月出生于江苏省扬州市。现为南方科技大学电子与电气工程系在读博士研究生。主要研究方向为可移动天线、智能反射面、超大规模阵列通信。E-mail: zhouchao2024@mail.sustech.edu.cn
  游昌盛男，1991年出生于福建省平潭县。现为南方科技大学电子与电气工程系副研究员、博士生导师。主要研究方向为智能反射面、超大规模阵列通信、边缘计算与边缘智能等。E-mail: youcs@sustech.edu.cn
- 基金信息：
  
  国家自然科学基金(62571227)
- DOI：10.12263/DZXB.20260555
  中图分类号： TN929.5;TN82
- 收稿：2026-06-06，
  
  录用：2026-06-25，
  
  网络首发：2026-07-29，
- 稿件说明：
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周超, 游昌盛. 面向超大规模平面阵列的混合场干扰分析[J/OL]. 电子学报, 2026,1-8.

ZHOU Chao, YOU Changsheng. Interference Analysis in Mixed-field Communications with Extremely Large-scale Planar Arrays[J/OL]. ACTA ELECTRONICA SINICA, 2026, 1-8.
周超, 游昌盛. 面向超大规模平面阵列的混合场干扰分析[J/OL]. 电子学报, 2026,1-8. DOI： 10.12263/DZXB.20260555.

ZHOU Chao, YOU Changsheng. Interference Analysis in Mixed-field Communications with Extremely Large-scale Planar Arrays[J/OL]. ACTA ELECTRONICA SINICA, 2026, 1-8. DOI： 10.12263/DZXB.20260555.

摘要

超大规模阵列可显著提升频谱效率、空间分辨率与波束聚焦能力，是面向6G无线通信的重要物理层支撑技术。随着阵列孔径和载频持续增大，近场球面波传播特性日益显著，近远场用户共存的混合场通信场景不可避免。现有研究主要考虑均匀线性阵列，而针对均匀平面阵列下远场波束在二维角域内向近场用户泄漏的物理机理及其对可达速率的影响，仍缺乏系统理论刻画。针对上述问题，本文研究超大规模均匀平面阵列下的混合场下行传输系统。首先，基于二维可分离菲涅尔近似，推导近场与远场导向向量之间混合场相关性函数的闭式表达，揭示远场波束向近场用户泄漏的二维耦合特征。其次，构建远场泄漏干扰下近场用户的速率损失模型，给出速率损失的精确表达式，并分析其关于泄漏强度和理想接收信噪比的结构性质。最后，通过数值仿真验证理论分析的准确性，系统考察天线规模、二维角度失配、用户距离和功率分配对混合场干扰与速率损失的影响。结果表明，平面阵列下混合场泄漏具有显著二维耦合特征，速率损失关于泄漏函数单调递增且呈严格凹性；在高理想接收信噪比条件下，近场用户对远场泄漏更加敏感。本文结论可为超大规模平面阵列混合场通信系统中的波束设计、用户调度与干扰管控提供理论依据。

Abstract

Extremely large-scale arrays are regarded as a key enabling technology for sixth-generation (6G) wireless systems

owing to their substantial gains in spectral efficiency

spatial resolution

and beam-focusing capability. As the array aperture and carrier frequency increase

near-field spherical-wave propagation becomes more pronounced

making mixed-field communication scenarios with coexisting near-field and far-field users inevitable. Existing studies mainly focus on uniform linear arrays

while the physical mechanism of far-field beam leakage toward near-field users in the two-dimensional angular domain under uniform planar arrays

as well as its impact on achievable rate

remains insufficiently characterized. In this paper

we investigate a mixed-field downlink system equipped with an extremely large-scale UPA. Based on a separable Fresnel approximation

we derive a closed-form expression for the mixed-field correlation function between near-field and far-field steering vectors

which reveals the intrinsic 2D coupling characteristics of far-field leakage. We then establish a rate-loss model for the near-field user under far-field leakage interference

obtain the exact rate-loss expression

and characterize its structural properties with respect to the leakage intensity and the interference-free signal-to-noise ratio. Numerical results validate the theoretical analysis and further examine the effects of array size

2D angular mismatch

user distance

and power allocation. The results show that mixed-field leakage under planar arrays exhibits pronounced 2D coupling features

and that the rate loss is monotonically increasing and strictly concave with respect to the leakage intensity. Moreover

under a high interference-free signal-to-noise ratio

the near-field user becomes more sensitive to far-field leakage. These findings provide theoretical guidance for beamforming design

user scheduling

and interference management in mixed-field communication systems with extremely large-scale planar arrays.

关键词

Keywords

references

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