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Properly designed precoders can significantly improve the spectral efficiency of multiple-input multiple-output (MIMO) relay systems. In this paper, we investigate joint source and relay precoding design based on the mean-square-error (MSE)…

信息论 · 计算机科学 2015-06-03 Rui Wang , Meixia Tao

Millimeter-wave (mmWave) technology is one of the most promising candidates for future wireless communication systems as it can offer large underutilized bandwidths and eases the implementation of large antenna arrays which are required to…

信号处理 · 电气工程与系统科学 2019-04-01 Nuno Souto , João Silva , João Pavia , Marco Ribeiro

Designing decentralized policies for wireless communication networks is a crucial problem, which has only been partially solved in the literature so far. In this paper, we propose the Decentralized Markov Decision Process (Dec-MDP)…

信息论 · 计算机科学 2017-01-10 Alessandro Biason , Subhrakanti Dey , Michele Zorzi

Antenna arrays will be an important ingredient in millimeter wave (mmWave) cellular systems. A natural application of antenna arrays is simultaneous transmission to multiple users. Unfortunately, the hardware constraints in mmWave systems…

信息论 · 计算机科学 2016-11-18 Ahmed Alkhateeb , Geert Leus , Robert W. Heath

This paper studies the maximization of the weighted sum energy efficiency (WSEE). We derive a first-order optimal algorithm applicable to a wide class of communication scenarios exhibiting very fast convergence. We also discuss how to…

信息论 · 计算机科学 2018-12-19 Bho Matthiesen , Yang Yang , Eduard A. Jorswieck

When designing variational autoencoders (VAEs) or other types of latent space models, the dimensionality of the latent space is typically defined upfront. In this process, it is possible that the number of dimensions is under- or…

机器学习 · 计算机科学 2021-04-14 Cedric De Boom , Samuel Wauthier , Tim Verbelen , Bart Dhoedt

Millimeter wave (MmWave) has been regarded as a promising technology to support high-capacity communications in 5G era. However, its high-layer performance such as latency and packet drop rate in the long term highly depends on resource…

系统与控制 · 电气工程与系统科学 2023-03-30 Yifei Sun , Bojie Lv , Rui Wang , Haisheng Tan , Francis C. M. Lau

The high path loss associated with millimeter wave (mmWave) frequency communication can be compensated by large scale antenna arrays such as multiple-input multiple-output (MIMO) systems. The hybrid beamforming architecture which uses fewer…

信号处理 · 电气工程与系统科学 2022-11-17 Evangelos Vlachos , Aryan Kaushik , Muhammad Z. Shakir

This work considers a multiobjective version of the unit commitment problem that deals with finding the optimal generation schedule of a firm, over a period of time and a given electrical network. With growing importance of environmental…

最优化与控制 · 数学 2025-01-14 Ece Tevruez , Aswin Kannan

Reconfigurable intelligent surfaces (RISs) are considered to be a promising solution to overcome the blockage issue in the millimeter-wave (mmWave) band. Energy efficiency is an important performance metric in mmWave systems with a large…

信号处理 · 电气工程与系统科学 2022-11-17 Ahmed Magbool , Vaibhav Kumar , Mark F. Flanagan

Using precoding to suppress multi-user interference is a well-known technique to improve spectra efficiency in multiuser multiple-input multiple-output (MU-MIMO) systems, and the pursuit of high performance and low complexity precoding…

信息论 · 计算机科学 2022-07-11 Maojun Zhang , Jiabao Gao , Caijun Zhong

In this paper, we study multiple-input multiple-output (MIMO) wireless power transfer (WPT) systems, where the energy harvester (EH) node is equipped with multiple nonlinear rectennas. We characterize the optimal transmit strategy by the…

信息论 · 计算机科学 2021-04-20 Nikita Shanin , Laura Cottatellucci , Robert Schober

Coming cellular systems are envisioned to open up to new services with stringent reliability and energy efficiency requirements. In this paper we focus on the joint power control and rate allocation problem in Single-Input Multiple-Output…

网络与互联网体系结构 · 计算机科学 2019-05-15 Onel L. Alcaraz López , Hirley Alves , Matti Latva-aho

In facing with the explosive Internet traffic growth, optical transport networks based on WDM technologies forming the core part of Internet infrastructure carrying multi-Tb/s has to be re-considered from both designing, planning, operation…

网络与互联网体系结构 · 计算机科学 2021-05-19 Dao Thanh Hai , Le Anh Ngoc

In millimeter wave (mmWave) systems, the advanced lens antenna array can effectively reduce the radio frequency chains cost. However, the mmWave signal is still vulnerable to blocking obstacles and suffers from severe path loss. To address…

信号处理 · 电气工程与系统科学 2020-07-03 Yazheng Wang , Hancheng Lu , Dan Zhao , Huan Sun

In magnetic resonant coupling (MRC) enabled multiple-input multiple-output (MIMO) wireless power transfer (WPT) systems, multiple transmitters (TXs) each with one single coil are used to enhance the efficiency of simultaneous power transfer…

信息论 · 计算机科学 2017-04-26 Gang Yang , Mohammad R. Vedady Moghadam , Rui Zhang

This paper considers joint beamformer design towards maximizing the mutual information in a coherent wireless sensor network with noisy observation and multiple antennae. Leveraging the weighted minimum mean square error and block…

信息论 · 计算机科学 2015-11-12 Yang Liu , Jing Li , Xuanxuan Lu

Here, through a systematic methodology and the use of high performance computing, we calculate the optimum shape for a wave energy converter under the action of incident waves of (i) monochromatic unidirectional, (ii) monochromatic…

流体动力学 · 物理学 2018-05-23 Soheil Esmaeilzadeh , Mohammad-Reza Alam

The design of Wireless Information and Power Transfer (WIPT) has so far relied on an oversimplified and inaccurate linear model of the energy harvester. In this paper, we depart from this linear model and design WIPT considering the…

信息论 · 计算机科学 2017-09-22 Bruno Clerckx

To meet the requirements of high energy efficiency (EE) and large system capacity for the fifth-generation (5G) Internet of Things (IoT), the use of massive multiple-input multipleoutput (MIMO) technology has been launched in the massive…

信号处理 · 电气工程与系统科学 2018-06-01 Tiejun Lv , Zhipeng Lin , Pingmu Huang , Jie Zeng