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The problem of beam alignment (BA) in a cell-free massive multiple-input multiple-output (CF-mMIMO) system operating at millimeter wave (mmWaves) carrier frequencies is considered in this paper. Two estimation algorithms are proposed, in…

信息论 · 计算机科学 2021-06-28 Stefano Buzzi , Carmen D'Andrea , Maria Fresia , Xiaofeng Wu

Future cellular systems will make use of millimeter wave (mmWave) frequency bands. Many users in these bands are located indoors, i.e., inside buildings, homes, and offices. Typical building material attenuations in these high frequency…

信号处理 · 电气工程与系统科学 2021-01-07 Nozhan Hosseini , Mahfuza Khatun , Changyu Guo , Kairui Du , Ozgur Ozdemir , David W. Matolak , Ismail Guvenc , Hani Mehrpouyan

Supporting high mobility in millimeter wave (mmWave) systems enables a wide range of important applications such as vehicular communications and wireless virtual/augmented reality. Realizing this in practice, though, requires overcoming…

信息论 · 计算机科学 2019-02-25 Ahmed Alkhateeb , Sam Alex , Paul Varkey , Ying Li , Qi Qu , Djordje Tujkovic

Millimeter wave (mmWave) systems operating over a wide bandwidth and using a large number of antennas impose a heavy burden on power consumption. In a massive multiple-input multiple-output (MIMO) uplink, analog-to-digital con- verters…

信息论 · 计算机科学 2017-02-28 Jinseok Choi , Brian L. Evans , Alan Gatherer

Millimeter-wave MIMO systems have gained increasing traction towards the goal of meeting the high data-rate requirements in next-generation wireless systems. The focus of this work is on low-complexity beamforming approaches for initial UE…

信息论 · 计算机科学 2016-05-04 Vasanthan Raghavan , Juergen Cezanne , Sundar Subramanian , Ashwin Sampath , Ozge Koymen

Using out-of-band (OOB) side-information has recently been shown to accelerate beam selection in single-user millimeter wave (mmWave) massive MIMO communications. In this paper, we propose a novel OOB-aided beam selection framework for a…

信号处理 · 电气工程与系统科学 2019-04-01 Flavio Maschietti , David Gesbert , Paul de Kerret

Beamforming techniques have been widely used in the millimeter wave (mmWave) bands to mitigate the path loss of mmWave radio links as the narrow straight beams by directionally concentrating the signal energy. However, traditional mmWave…

信息论 · 计算机科学 2023-04-03 Kan Zheng , Haojun Yang , Ziqiang Ying , Pengshuo Wang , Lajos Hanzo

Millimeter-wave (mmWave) communication systems require narrow beams to increase communication range. If the dominant communication direction is blocked by an obstacle, an alternative and reliable spatial communication path should be quickly…

信号处理 · 电气工程与系统科学 2020-10-01 Fatih Erden , Ozgur Ozdemir , Ismail Guvenc , David W. Matolak

In this paper, we investigate the problem of beam alignment in millimeter wave (mmWave) systems, and design an optimal algorithm to reduce the overhead. Specifically, due to directional communications, the transmitter and receiver beams…

信息论 · 计算机科学 2017-12-29 Morteza Hashemi , Ashutosh Sabharwal , C. Emre Koksal , Ness B. Shroff

We propose a novel analytical framework for evaluating the coverage performance of a millimeter wave (mmWave) cellular network where idle user equipments (UEs) act as relays. In this network, the base station (BS) adopts either the direct…

信息论 · 计算机科学 2019-12-30 Simin Xu , Nan Yang , Biao He , Hamid Jafarkhani

Millimetre wave (mm-wave) communication is considered as one of the most important enablers for the fifth generation communication (5G) system to support data rate of Gbps and above. In some scenarios, it is crucial to maintain a line of…

信息论 · 计算机科学 2017-06-05 Yinan Qi , Mythri Hunukumbure , Yue Wang

Provisioning of high throughput millimetre-wave signal to indoor areas that potentially serve a large number of users, such as transportation hubs or convention centres, will require dedicated indoor millimetre-wave access point…

信息论 · 计算机科学 2018-02-19 Fadhil Firyaguna , Jacek Kibilda , Carlo Galiotto , Nicola Marchetti

In this paper, we address the problem of three dimensional beamforming in millimeter wave (mmWave) wireless networks. In particular, we study the impact of base station (BS) antenna tilt angle optimization on the energy efficiency (EE) of…

信号处理 · 电气工程与系统科学 2018-12-05 Mahdi Baianifar

Millimeter wave (mmWave) communications systems are promising candidate to support extremely high data rate services in future wireless networks. MmWave communications exhibit high penetration loss (blockage) and require directional…

信息论 · 计算机科学 2016-02-04 Roberto Congiu , Hossein Shokri-Ghadikolaei , Carlo Fischione , Fortunato Santucci

Covert communication prevents legitimate transmission from being detected by a warden while maintaining certain covert rate at the intended user. Prior works have considered the design of covert communication over conventional low-frequency…

信息论 · 计算机科学 2020-07-14 Jiayu Zhang , Min Li , Shihao Yan , Chunshan Liu , Xihan Chen , Minjian Zhao , Philip Whiting

In this paper, we consider millimeter Wave (mmWave) technology to provide reliable wireless network service within factories where links may experience rapid and temporary fluctuations of the received signal power due to dynamic blockers,…

网络与互联网体系结构 · 计算机科学 2024-10-28 Andrea Bonfante , Lorenzo Galati Giordano , Irene Macaluso , Nicola Marchetti

The fact that Millimeter Wave (mmWave) communication needs to be directional is usually perceived as a challenge; in this paper we argue that it enables efficient secret key sharing that are unconditionally secure from passive…

密码学与安全 · 计算机科学 2019-05-03 Mohammed Karmoose , Christina Fragouli , Suhas Diggavi , Rafael Misoczki , Lily L. Yang , Zhenliang Zhang

Mobility and blockage are two critical challenges in wireless transmission over millimeter-wave (mmWave) and Terahertz (THz) bands. In this paper, we investigate network massive multiple-input multiple-output (MIMO) transmission for…

信号处理 · 电气工程与系统科学 2020-11-24 Li You , Xu Chen , Xiaohang Song , Fan Jiang , Wenjin Wang , Xiqi Gao , Gerhard Fettweis

The densely packed antennas of millimeter-Wave (mmWave) MIMO systems are often blocked by the rain, snow, dust and even by fingers, which will change the channel's characteristics and degrades the system's performance. In order to solve…

信息论 · 计算机科学 2021-06-08 Siqi Ma , Wenqian Shen , Jianping An , Lajos Hanzo

In mmWave networks, a large or nearby object can obstruct multiple communication links, which results in spatial correlation in the blocking probability between a user and two or more base stations (BSs). This paper characterizes this…

信息论 · 计算机科学 2021-12-14 Saurabh Kumar Gupta , Vikrant Malik , Abhishek K. Gupta , Jeffrey G. Andrews