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The impressive growth of wireless data networks has recently led to increased attention to the issue of electromagnetic pollution. Specific absorption rates and incident power densities have become popular indicators for measuring…

信息论 · 计算机科学 2024-10-28 Sergi Liesegang , Stefano Buzzi

A large-scale distributed antenna system that serves the users by coherent joint transmission is called Cell-free Massive MIMO (multiple input multiple output). For a given user set, only a subset of the access points (APs) is likely needed…

信息论 · 计算机科学 2019-11-27 Trinh Van Chien , Emil Björnson , Erik G. Larsson

Cell-free multi-user multiple input multiple output networks are a promising alternative to classical cellular architectures, since they have the potential to provide uniform service quality and high resource utilisation over the entire…

系统与控制 · 电气工程与系统科学 2023-01-18 Sergey S. Tambovskiy , Gábor Fodor , Hugo Tullberg

In this paper, we study power allocation for secure communication in a multiuser multiple-input single-output (MISO) downlink system with simultaneous wireless information and power transfer. The receivers are able to harvest energy from…

信息论 · 计算机科学 2013-07-30 Derrick Wing Kwan Ng , Lin Xiang , Robert Schober

This paper introduces a novel iterative algorithm for optimizing pilot and data power control (PC) in cell-free massive multiple-input multiple-output (CF-mMIMO) systems, aiming to enhance system performance under real-time channel…

信号处理 · 电气工程与系统科学 2026-01-05 Saeed Mohammadzadeh , Mostafa Rahmani , Kanapathippillai Cumanan , Alister Burr , Pei Xiao

We consider the system-wide utility maximization problem in the downlink of a cell-free massive multiple-input multiple-output (MIMO) system whereby a very large number of access points (APs) simultaneously serve a group of users.…

信号处理 · 电气工程与系统科学 2020-09-22 Muhammad Farooq , Hien Quoc Ngo , Een-Kee Hong , Le-Nam Tran

We examine the problem of optimizing resource allocation in the uplink for a user-centric, cell-free, multi-input multi-output network. We start by modeling and developing resource allocation algorithms for two standard network operation…

信息论 · 计算机科学 2024-06-11 Zehua Li , Raviraj Adve

We consider a cell-free Massive multiple-input multiple-output (MIMO) system and investigate the system performance for the case when the quantized version of the estimated channel and the quantized received signal are available at the…

信息论 · 计算机科学 2018-02-09 Manijeh Bashar , Kanapathippillai Cumanan , Alister G. Burr , Hien Quoc Ngo , Merouane Debbah

We consider the uplink of a multicell multiuser multiple-input multiple-output system where the channel experiences both small and large-scale fading. The data detection is done by using the linear zero-forcing technique, assuming the base…

信息论 · 计算机科学 2012-07-02 Hien Quoc Ngo , Michail Matthaiou , Trung Q. Duong , Erik G. Larsson

In this paper, we investigate the uplink transmit power optimization problem in cell-free (CF) extremely large-scale multiple-input multiple-output (XL-MIMO) systems. Instead of applying the traditional methods, we propose two signal…

信息论 · 计算机科学 2023-02-21 Ziheng Liu , Zhilong Liu , Jiayi Zhang , Huahua Xiao , Bo Ai , Derrick Wing Kwan Ng

Non-cooperative cellular massive MIMO, combined with power control, is known to lead to significant improvements in per-user throughput compared with conventional LTE technology. In this paper, we investigate further refinements to massive…

This paper considers cell-free massive multiple-input multiple-output systems where the multiple-antenna access points (APs) assist the single-antenna user equipments (UEs) by wireless power transfer. The UEs utilize the energy harvested in…

信息论 · 计算机科学 2020-01-28 Özlem Tuğfe Demir , Emil Björnson

Multi-Cell (MC) systems are present in mobile network operations from the first generation to the fifth generation of wireless networks, and considers the signals of all users to a base station (BS) centered in a cell. Cell-Free (CF)…

信息论 · 计算机科学 2022-10-04 E. F. de Almeida , R. C. de Lamare

In this paper, energy efficient power control for the uplink two-tier networks where a macrocell tier with a massive multiple-input multiple-output (MIMO) base station is overlaid with a small cell tier is investigated. We propose a…

网络与互联网体系结构 · 计算机科学 2017-03-23 Ningning Lu , Yanxiang Jiang , Fuchun Zheng , Xiaohu You

In cell-free massive multiple-input multiple-output (MIMO) networks, robust resource allocation is critical to ensure reliable system performance in the presence of channel uncertainties resulting from imperfect channel state information…

Resource allocation is a fundamental task in cell-free (CF) massive multi-input multi-output (MIMO) systems, which can effectively improve the network performance. In this paper, we study the downlink of CF MIMO networks with network…

信息论 · 计算机科学 2023-12-22 S. Mashdour , A. Schmeink , R. C. de Lamare , J. P. Sales

Cell-free massive multi-input multi-output (MIMO) has recently gained a lot of attention due to its high potential in sixth-generation (6G) wireless systems. The goal of this paper is to first present a unified modeling for massive MIMO,…

信息论 · 计算机科学 2024-05-17 Wei Jiang , Hans D. Schotten

This paper considers the optimum single cell power-control maximizing the aggregate (uplink) communication rate of the cell when there are peak power constraints at mobile users, and a low-complexity data decoder (without successive…

信息论 · 计算机科学 2011-05-31 Hazer Inaltekin , Stephen V. Hanly

Uplink power control is an efficient scheme to mitigate pilot contamination in massive multiple-input multiple-output (MIMO) systems. In this work, we provide a comprehensive study on the effects of fractional power control (FPC) on the…

网络与互联网体系结构 · 计算机科学 2018-09-11 Paolo Baracca , Lorenzo Galati Giordano , Adrian Garcia-Rodriguez , Giovanni Geraci , David Lopez-Perez

This paper investigates the downlink power allocation of the simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)-assisted cell-free massive multiple-input multiple-output (MIMO) system with multi-antenna…

信息论 · 计算机科学 2025-12-23 Jun Qian , Ross Murch , Khaled B. Letaief