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Joint unicast and multicast transmissions are becoming increasingly important in practical wireless systems, such as Internet of Things networks. This paper investigates a cell-free massive multiple-input multiple-output system that…

信号处理 · 电气工程与系统科学 2025-08-20 Mustafa S. Abbas , Zahra Mobini , Hien Quoc Ngo , Hyundong Shin , Michail Matthaiou

Large-scale distributed antenna systems with many access points (APs) that serve the users by coherent joint transmission is being considered for 5G-and-beyond networks. The technology is called Cell-free Massive MIMO and can provide a more…

信息论 · 计算机科学 2020-06-30 Trinh Van Chien , Emil Björnson , Erik G. Larsson

Cell-free massive MIMO is a variant of multiuser MIMO and massive MIMO, in which the total number of antennas $LM$ is distributed among the $L$ remote radio units (RUs) in the system, enabling macrodiversity and joint processing. Due to…

信息论 · 计算机科学 2022-06-09 Fabian Göttsch , Noboru Osawa , Takeo Ohseki , Kosuke Yamazaki , Giuseppe Caire

In this thesis, we study the downlink multiuser scheduling and power allocation problem for systems with simultaneous wireless information and power transfer (SWIPT). In the first part of the thesis, we focus on multiuser scheduling. We…

信息论 · 计算机科学 2015-03-18 Maryna Chynonova

This letter considers simultaneous wireless information and power transfer (SWIPT) for a multiple-input multiple-output (MIMO) relay system. The relay is powered by harvesting energy from the source via time switching (TS) and utilizes the…

信息论 · 计算机科学 2017-04-11 Jialing Liao , Muhammad R. A. Khandaker , Kai-Kit Wong

Antennas of transmitters and receivers have been manipulated to increase the capacity of transmission and reception of signals. Using many elements in antennas to shape beams and direct nulls in a particular point for optimum signal…

网络与互联网体系结构 · 计算机科学 2016-10-18 Mboli Sechang Julius

Massive MIMO is a promising technique to meet the exponential growth of global mobile data traffic demand. However, contrary to the current systems, energy consumption of next generation networks is required to be load adaptive as the…

网络与互联网体系结构 · 计算机科学 2015-10-05 M. M. Aftab Hossain , Cicek Cavdar , Emil Björnson , Riku Jäntti

Radio frequency (RF) wireless power transfer (WPT) is a promising technology for future wireless systems. However, the low power transfer efficiency (PTE) is a critical challenge for practical implementations. One of the main inefficiency…

信号处理 · 电气工程与系统科学 2024-11-21 Amirhossein Azarbahram , Onel L. A. López , Matti Latva-Aho

We propose techniques for optimizing transmit beamforming in a full-duplex multiple-input-multiple-output (MIMO) wireless-powered communication system, which consists of two phases. In the first phase, the wireless-powered mobile station…

信息论 · 计算机科学 2017-05-12 Batu K. Chalise , Himal A. Suraweera , Gan Zheng , George K. Karagiannidis

We consider the problem of maximizing the harvested power in Multiple Input Multiple Output (MIMO) Simultaneous Wireless Information and Power Transfer (SWIPT) systems with power splitting reception. Different from recently proposed…

信息论 · 计算机科学 2017-10-13 Deepak Mishra , George C. Alexandropoulos

This paper studies an unmanned aerial vehicle (UAV)-enabled wireless powered communication network (WPCN), in which a UAV is dispatched as a mobile access point (AP) to serve a set of ground users periodically. The UAV employs the radio…

信息论 · 计算机科学 2018-10-10 Lifeng Xie , Jie Xu , Rui Zhang

In this paper, we study a multi-sine multiple-input multiple-output (MIMO) wireless power transfer (WPT) system with the objective to increase the output DC power. We jointly optimize the multi-sine waveform and beamforming accounting for…

信号处理 · 电气工程与系统科学 2021-08-24 Shanpu Shen , Bruno Clerckx

This paper investigates a wireless powered mobile edge computing (WP-MEC) network with multiple hybrid access points (HAPs) in a dynamic environment, where wireless devices (WDs) harvest energy from radio frequency (RF) signals of HAPs, and…

网络与互联网体系结构 · 计算机科学 2024-12-16 Xiaoying Liu , Anping Chen , Kechen Zheng , Kaikai Chi , Bin Yang , Tarik Taleb

This letter investigates a multiple-input multiple-output (MIMO) wireless power transfer (WPT) system under practical non-liner energy harvesting (EH) models. We propose a new generic energy receiver (ER) architecture consisting of $N$…

信号处理 · 电气工程与系统科学 2019-01-30 Ganggang Ma , Jie Xu , Yong Zeng , Mohammad R. Vedady Moghadam

In this paper, we study the energy efficiency (EE) maximization problem in multiple-input multiple-output (MIMO) two-way relay networks with simultaneous wireless information and power transfer (SWIPT). The network consists of a…

信息论 · 计算机科学 2017-03-23 Javane Rostampoor , S. Mohammad Razavizadeh , Inkyu Lee

The joint design of spatial channel assignment and power allocation in Multiple Input Multiple Output (MIMO) systems capable of Simultaneous Wireless Information and Power Transfer (SWIPT) is studied. Assuming availability of channel state…

信息论 · 计算机科学 2017-10-25 Deepak Mishra , George C. Alexandropoulos

We investigate the energy efficiency performance of cell-free Massive multiple-input multiple-output (MIMO), where the access points (APs) are connected to a central processing unit (CPU) via limited-capacity links. Thanks to the…

This paper investigates simultaneous wireless information and power transfer (SWIPT) for multiuser multiple-input-single-output (MISO) secrecy channel. First, transmit beamfoming without artificial noise (AN) design is considered, where two…

信息论 · 计算机科学 2015-03-24 Zheng Chu , Martin Johnston , Stephane Le Goff

This paper presents a new cooperative wireless communication network strategy that incorporates energy cooperation and data cooperation. The model establishment, design goal formulations, and algorithms for throughput maximization of the…

信号处理 · 电气工程与系统科学 2018-01-30 Jun Zhou , Xiaodai Dong , Wu-Sheng Lu

This paper addresses joint transceiver and relay design for a wireless multiple-input-multiple-output (MIMO) switching scheme that enables data exchange among multiple users. Here, a multi-antenna relay linearly precodes the received…

信息论 · 计算机科学 2016-11-18 Fanggang Wang , Xiaojun Yuan , Soung Chang Liew , Dongning Guo