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This paper analyzes the spectral efficiency of massive multiple-input multiple-output (MIMO) systems in both centralized and distributed configurations, referred to as C-MIMO and D-MIMO, respectively. By accounting for real environmental…

信息论 · 计算机科学 2016-11-18 Gervais N. Kamga , Minghua Xia , Sonia Aïssa

Many concepts for future generations of wireless communication systems use coherent processing of signals from many distributed antennas. The aim is to improve communication reliability, capacity, and energy efficiency and provide…

We address the modeling and optimal beamforming (BF) design for multiple-input multiple-output (MIMO) continuous aperture array (CAPA) systems operating over doubly-dispersive (DD) channels. First, a comprehensive DD continuous MIMO (DDC…

信号处理 · 电气工程与系统科学 2025-09-05 Kuranage Roche Rayan Ranasinghe , Zhaolin Wang , Hyeon Seok Rou , Giuseppe Thadeu Freitas de Abreu , Emil Björnson

An efficient analog network coding transmission protocol is proposed in this letter for a MIMO two way cellular network. Block signal alignment is first proposed to null the inter-user interference for multi-antenna users, which makes the…

信息论 · 计算机科学 2013-08-19 Ming Gan , Zhiguo Ding , Xuchu Dai

The separation of training and data transmission as well as the frequent uplink/downlink (UL/DL) switching make time-division duplex (TDD)-based massive multiple-input multiple-output (mMIMO) systems less competent in fast time-varying…

信息论 · 计算机科学 2022-09-29 Bohan Li , Lie-Liang Yang , Robert G Maunder , Songlin Sun , Pei Xiao

The challenge to in-band full-duplex wireless communication is managing self-interference. Many designs have employed spatial isolation mechanisms, such as shielding or multi-antenna beamforming, to isolate the self-interference wave from…

信息论 · 计算机科学 2015-06-11 Evan Everett , Ashutosh Sabharwal

Extremely large-scale multiple-input multiple-output (XL-MIMO) communication aims to further boost the antenna size significantly than current massive MIMO systems, for which conventional far-field assumption with uniform plane wave (UPW)…

信息论 · 计算机科学 2021-06-15 Haiquan Lu , Yong Zeng

Microchannel plates (MCP) are the basis for many spatially-resolved single-particle detectors such as ICCD or I-sCMOS cameras employing image intensifiers (II), MCPs with delay-line anodes for the detection of cold gas particles or…

仪器与探测器 · 物理学 2018-09-27 Michał Lipka , Michał Parniak , Wojciech Wasilewski

Holographic MIMO refers to a (possibly large) array with a large number of individually controlled and densely deployed antennas. The objective of this paper is to provide further insight into the use of closely spaced antennas in the…

信息论 · 计算机科学 2024-03-20 Antonio Alberto D'Amico , Luca Sanguinetti

A large-scale MIMO (multiple-input multiple-output) system offers significant advantages in wireless communication, including potential spatial multiplexing and beamforming capabilities. However, channel estimation becomes challenging with…

信号处理 · 电气工程与系统科学 2024-10-10 Özlem Tuğfe Demir , Emil Björnson

Gaseous X-ray polarimetry refers to a class of detectors used for measuring the polarization of soft X-rays. The systematic effects of such detectors introduce residual modulation, leading to systematic biases in the polarization detection…

天体物理仪器与方法 · 物理学 2024-07-22 Difan Yi , Qian Liu , Hongbang Liu , Fei Xie , Huanbo Feng , Zuke Feng , Jin Li , Enwei Liang , Yangheng Zheng

This paper considers a deterministic physical model of massive multiple-input multiple-output (MIMO) systems with uniform linear antenna arrays. It is known that the maximum spatial degrees of freedom is achieved by spacing antenna elements…

信息论 · 计算机科学 2016-01-22 Keigo Takeuchi

Extremely large-scale reconfigurable intelligent surfaces (XL-RISs) have emerged as a promising technology for millimeter-wave (mmWave) communications. However, the exceedingly large aperture of XL-RISs renders the RIS-user links likely to…

信息论 · 计算机科学 2026-05-11 Erkang Dong , Taihao Zhang , Cunhua Pan , Hong Ren , Jiangzhou Wang

The 3GPP suggests to combine dual polarized (DP) antenna arrays with the double directional (DD) channel model for downlink channel estimation. This combination strikes a good balance between high-capacity communications and parsimonious…

信号处理 · 电气工程与系统科学 2018-03-13 Cheng Qian , Xiao Fu , Nicholas D. Sidiropoulos , Ye Yang

Extremely large-scale multiple-input multiple-output (XL-MIMO) communications, enabled by numerous antenna elements integrated into large antenna surfaces, can provide increased effective degree of freedom (EDoF) to achieve high diversity…

信息论 · 计算机科学 2024-12-25 Shaohua Yue , Liang Liu , Boya Di

This paper proposes a codebook for jointly quantizing channel direction information (CDI) of spatially correlated three-dimensional (3D) multi-input-multi-output (MIMO) channels. To reduce the dimension for quantizing the CDI of large…

信息论 · 计算机科学 2015-01-26 Fang Yuan , Chenyang Yang , Yang Song , Lan Chen , Yuichi Kakishima , Huiling Jiang

In the evolving landscape of sixth-generation (6G) mobile communication, multiple-input multiple-output (MIMO) systems are incorporating an unprecedented number of antenna elements, advancing towards Extremely large-scale…

信号处理 · 电气工程与系统科学 2026-01-30 Yuan Gao , Xinyu Guo , Han Li , Jianbo Du , Shugong Xu

The paper describes the implementation and performance analysis of the first fully-operational beam-space MIMO antenna for the spatial multiplexing of two QPSK streams. The antenna is composed of a planar three-port radiator with two…

When the users in a MIMO broadcast channel experience different spatial transmit correlation matrices, a class of gains is produced that is denoted transmit correlation diversity. This idea was conceived for channels in which transmit…

信息论 · 计算机科学 2021-04-21 Fan Zhang , Khac-Hoang Ngo , Sheng Yang , Aria Nosratinia

MIMO spatial multiplexing is an essential feature to increase the communication data rates in current and future cellular systems. Currently, the ns-3 lte module leverages an abstraction model for 2x2 MIMO with spatial multiplexing of two…

网络与互联网体系结构 · 计算机科学 2022-04-21 Biljana Bojovic , Zoraze Ali , Sandra Lagen