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Extremely large-scale multiple-input-multiple-output (XL-MIMO) with hybrid precoding is a promising technique to meet the high data rate requirements for future 6G communications. To realize efficient hybrid precoding, it is essential to…

Information Theory · Computer Science 2022-01-20 Mingyao Cui , Linglong Dai

Accurate channel model and channel estimation are essential to empower extremely large-scale MIMO (XL-MIMO) in 6G networks with ultra-high spectral efficiency. With the sharp increase in the antenna array aperture of the XL-MIMO scenario,…

Information Theory · Computer Science 2023-04-25 Yu Lu , Linglong Dai

Extremely large-scale multiple-input multiple-output (XL-MIMO) is a promising technology for the sixth-generation (6G) mobile communication networks. By significantly boosting the antenna number or size to at least an order of magnitude…

Information Theory · Computer Science 2024-04-04 Haiquan Lu , Yong Zeng , Changsheng You , Yu Han , Jiayi Zhang , Zhe Wang , Zhenjun Dong , Shi Jin , Cheng-Xiang Wang , Tao Jiang , Xiaohu You , Rui Zhang

Extremely large-scale multiple-input multiple-output (XL-MIMO) is a key technology for next-generation wireless communication systems. By deploying significantly more antennas than conventional massive MIMO systems, XL-MIMO promises…

Information Theory · Computer Science 2026-03-20 Ming Zeng , Ji Wang , Wanming Hao , Zheng Chu , Wenwu Xie , Quoc-Viet Pham

Extremely large-scale multiple-input multiple-output (XL-MIMO) systems are a key technology for future wireless networks, but the large array aperture naturally creates a hybrid-field (HF) propagation regime in which far-field (FF)…

Systems and Control · Electrical Eng. & Systems 2026-02-04 David William Marques Guerra , Taufik Abrao

Near-field communication comes to be an indispensable part of the future sixth generation (6G) communications at the arrival of the forth-coming deployment of extremely large-scale multiple-input-multiple-output (XL-MIMO) systems. Due to…

Signal Processing · Electrical Eng. & Systems 2024-09-04 Haochen Wu , Liyang Lu , Zhaocheng Wang

Channel estimation is a critical task in extremely large-scale multiple-input multiple-output (XL-MIMO) systems for 6G wireless communications. A hybrid-field channel model effectively characterizes the mixed far-field and near-field…

Information Theory · Computer Science 2025-09-24 Dehui Yang , Feng Xi , Yanxian Zhu

Extremely large-scale multiple-input multiple-output (XL-MIMO) is a key enabling technology for sixth-generation (6G) communication systems. Nevertheless, the increase in array aperture and signal bandwidth brings new challenges to wideband…

Signal Processing · Electrical Eng. & Systems 2026-04-23 Qingxia Feng , Yin Fang , Meng Hua , Cheng Zhang , Chunguo Li , Yongming Huang , Luxi Yang

Terahertz ultra-massive multiple-input multiple-output (THz UM-MIMO) is envisioned as one of the key enablers of 6G wireless systems. Due to the joint effect of its array aperture and small wavelength, the near-field region of THz UM-MIMO…

Signal Processing · Electrical Eng. & Systems 2023-02-28 Wentao Yu , Yifei Shen , Hengtao He , Xianghao Yu , Jun Zhang , Khaled B. Letaief

This paper addresses the intricate task of hybrid-field channel estimation in extremely large-scale MIMO (XL-MIMO) systems, critical for the progression of 6G communications. Within these systems, comprising a line-of-sight (LoS) channel…

Information Theory · Computer Science 2024-03-29 Yoonseong Kang , Hyowoon Seo , Wan Choi

Extremely large-scale multiple-input multiple-output (XL-MIMO) enables the formation of narrow beams, effectively mitigating path loss in high-frequency communications. This capability makes the integration of wideband high-frequency…

Signal Processing · Electrical Eng. & Systems 2025-05-27 Peicong Zheng , Xuantao Lyu , Ye Wang , Yi Gong

This paper addresses the challenge of channel estimation in extremely large-scale multiple-input multiple-output (XL-MIMO) systems, pivotal for the advancement of 6G communications. XL-MIMO systems, characterized by their vast antenna…

Signal Processing · Electrical Eng. & Systems 2026-01-22 Sunho Kim , Wan Choi

Extremely large-scale multiple-input multiple-output (XL-MIMO) is regarded as one of the key techniques to enhance the performance of future wireless communications. Different from regular MIMO, the XL-MIMO shifts part of the communication…

Information Theory · Computer Science 2024-10-16 Kangjian Chen , Chenhao Qi , Jingjia Huang , Octavia A. Dobre , Geoffrey Ye Li

Extremely large-scale multiple-input multipleoutput (XL-MIMO) is believed to be a cornerstone of sixth-generation (6G) wireless networks. XL-MIMO uses more antennas to both achieve unprecedented spatial degrees of freedom (DoFs) and exploit…

Signal Processing · Electrical Eng. & Systems 2024-07-16 Hao Lei , Jiayi Zhang , Zhe Wang , Huahua Xiao , Bo Ai , Emil Björnson

Extremely large-scale massive multiple-input multiple-output (XL-MIMO) is a key enabler for sixth-generation (6G) networks, offering massive spatial degrees of freedom. Despite these advantages, the coexistence of near-field and far-field…

Machine Learning · Computer Science 2025-12-11 Renbin Li , Shuangshuang Li , Peihao Dong

Extremely large-scale multiple-input multiple-output (XL-MIMO) is regarded as a promising technology for next-generation communication systems. However, this will expand the near-field (NF) range, rendering more users more likely to be…

Signal Processing · Electrical Eng. & Systems 2025-07-01 Zihang Ding , Jianhua Zhang , Changsheng You , Pan Tang , Hongbo Xing , Zhiqiang Yuan , Jie Meng , Guangyi Liu

Extremely large-scale multiple-input-multiple-output (XL-MIMO) is a promising technology to empower the next-generation communications. However, XL-MIMO, which is still in its early stage of research, has been designed with a variety of…

Information Theory · Computer Science 2023-04-07 Zhe Wang , Jiayi Zhang , Hongyang Du , Wei E. I. Sha , Bo Ai , Dusit Niyato , Mérouane Debbah

Extremely large-scale multiple-input multiple-output (XL-MIMO) is crucial for satisfying the high data rate requirements of the sixth-generation (6G) wireless networks. In this context, ensuring accurate acquisition of channel state…

Signal Processing · Electrical Eng. & Systems 2024-05-27 Hao Lei , Jiayi Zhang , Zhe Wang , Bo Ai , Derrick Wing Kwan Ng

Extremely large-scale massive MIMO (XL-MIMO) has been reviewed as a promising technology for future wireless communications. The deployment of XL-MIMO, especially at high-frequency bands, leads to users being located in the near-field…

Information Theory · Computer Science 2022-11-29 Xiangyu Zhang , Zening Wang , Haiyang Zhang , Luxi Yang

Extremely large-scale multiple-input multiple-output (XL-MIMO) is a promising technique to enable versatile applications for future wireless communications.To realize the huge potential performance gain, accurate channel state information…

Information Theory · Computer Science 2023-09-06 Hao Lei , Jiayi Zhang , Huahua Xiao , Xiaodan Zhang , Bo Ai , Derrick Wing Kwan Ng
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