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Extremely large-scale massive MIMO (XL-MIMO) is a promising technique for future 6G communications.However, existing far-field or near-field channel model mismatches the hybrid-field channel feature in the practical XL-MIMO…

Information Theory · Computer Science 2021-11-23 Xiuhong Wei , Linglong Dai

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

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

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

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) 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

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 multiple-input multiple-output (XL-MIMO) is expected to be an important technology in future sixth generation (6G) networks. Compared with conventional single-polarized XL-MIMO, where signals are transmitted and…

Information Theory · Computer Science 2025-02-21 Shuhao Zeng , Boya Di , Hongliang Zhang , Zhu Han , H. Vincent Poor

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

Existing near-field channel estimation methods for extremely large-scale MIMO (XL-MIMO) typically discretize angle and range parameters jointly, resulting in large polar-domain codebooks. This paper proposes a novel framework that…

Signal Processing · Electrical Eng. & Systems 2025-12-15 Feng Xi , Dehui Yang

Extremely large-scale multiple-input multiple-output (XL-MIMO) systems operating at sub-THz carrier frequencies represent a promising solution to meet the demands of next-generation wireless applications. This work focuses on sparse channel…

Signal Processing · Electrical Eng. & Systems 2025-08-13 Vidya Bhasker Shukla , Italo Atzeni

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

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) 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

Extremely large-scale multiple-input multiple-output (XL-MIMO) systems are pivotal to next-generation wireless communications, where dynamic RF chain architectures offer enhanced performance. However, efficient precoding in such systems…

Signal Processing · Electrical Eng. & Systems 2025-09-25 Jiayi Lu , Jiayi Zhang , Hao Lei , Huahua Xiao , Bo Ai , Derrick Wing Kwan Ng

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

Future wireless systems are expected to employ extremely large-scale multiple-input multiple-output (XL-MIMO) arrays at high carrier frequencies, where near-field propagation makes the channel depend jointly on angle and distance. The…

Signal Processing · Electrical Eng. & Systems 2026-05-27 Maral Safari , Italo Atzeni

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

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 promising technique to achieve ultra-high spectral efficiency for future 6G communications. The mixed line-of-sight (LoS) and non-line-of-sight (NLoS) XL-MIMO near-field…

Signal Processing · Electrical Eng. & Systems 2024-06-18 Ming Ye , Xiao Liang , Cunhua Pan , Yinfei Xu , Ming Jiang , Chunguo Li
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