研究方向介绍：无蜂窝通信网络是一种超越传统小区划分的网络架构，采用密集部署的大量接入点共同服务所有用户，实现空间资源的集中式或分布式调度，提升频谱效率、均衡用户体验，特别适用于高移动性、海量连接与边缘通信场景，是构建未来6G空天地一体网络的关键技术之一。

本人研究内容：深入研究了Cell-Free架构下的全息MIMO与智能超表面集成机制，提出了多种联合波束设计、用户关联与干扰抑制算法，在近场条件下构建了硬件受限场景下的系统性能下界模型，相关成果发表在IEEE TWC、IEEE TCOM、IEEE TVT等主流期刊。

图1：基于无蜂窝网络架构的无线通信架构

期刊论文：

[1]  Qingchao Li, Mohammed El-Hajjar, Yanshi Sun, Lajos Hanzo, “Performance Analysis of Reconfigurable Holographic Surfaces in the Near-Field Scenario of Cell-Free Networks Under Hardware Impairments” [J]. IEEE Transactions on Wireless Communications, 2024, 23(9): 11972-11984.

[2] Qingchao Li, Mohammed El-Hajjar, Chao Xu, Jiancheng An, Chau Yune, Lajos Hanzo, “Stacked Intelligent Metasurfaces for Holographic MIMO Aided Cell-Free Networks” [J]. IEEE Transactions on Communications, 2024.

[3]   Qingchao Li, Mohammed El-Hajjar, Chao Xu, Chao Zhang, Lajos Hanzo, “Hierarchical Beamforming Design for XL-MIMO with Hardware Impairments in Cell-Free Networks” [J]. IEEE Transactions on Vehicular Technology, 2025.

[4]  Qingchao Li, Mohammed El-Hajjar, Chao Xu, Kunlun Li, Xinyu Feng, Lajos Hanzo, “Holographic MIMO Aided Integrated User-Centric Cell-Free Terrestrial and Non-Terrestrial Networks” [J], IEEE Network, 2025.