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Millimeter-wave (mmWave) networks rely on directional transmissions, in both control plane and data plane, to overcome severe path-loss. Nevertheless, the use of narrow beams complicates the initial cell-search procedure where we lack…

Information Theory · Computer Science 2018-02-20 Yanpeng Yang , Hossein S. Ghadikolaei , Carlo Fischione , Marina Petrova , Ki Won Sung

Large antenna arrays will be needed in future millimeter wave (mmWave) cellular networks, enabling a large number of different possible antenna architectures and multiple-input multiple-output (MIMO) techniques. It is still unclear which…

Information Theory · Computer Science 2016-11-15 Mandar N. Kulkarni , Amitava Ghosh , Jeffrey G. Andrews

Millimeter wave (mmWave) communications have been postulated as one of the most disruptive technologies for future 5G systems. Among mmWave bands the 60-GHz radio technology is specially suited for ultradense small cells and mobile data…

Networking and Internet Architecture · Computer Science 2016-05-19 Cristina Perfecto , Javier Del Ser , Muhammad Ikram Ashraf , Miren Nekane Bilbao , Mehdi Bennis

Millimeter wave (mmWave) communication systems use large number of antenna elements that can potentially overcome severe channel attenuation by narrow beamforming. Narrow-beam operation in mmWave networks also reduces multiuser…

Information Theory · Computer Science 2015-12-15 Hossein Shokri-Ghadikolaei , Carlo Fischione

Recently, there has been considerable interest in new tiered network cellular architectures, which would likely use many more cell sites than found today. Two major challenges will be i) providing backhaul to all of these cells and ii)…

Information Theory · Computer Science 2016-11-15 Sooyoung Hur , Taejoon Kim , David J. Love , James V. Krogmeier , Timothy A. Thomas , Amitava Ghosh

Millimeter wave (mmWave) communication represents one of the main innovations of the next generation of wireless technologies, allowing users to reach unprecedented data rates. To overcome the high path loss at mmWave frequencies, these…

Signal Processing · Electrical Eng. & Systems 2020-11-12 Mattia Lecci , Tommaso Zugno , Silvia Zampato , Michele Zorzi

Millimeter-wave (mmWave) cell-free massive multi-user (MU) multiple-input multiple-output (MIMO) systems combine the large bandwidths available at mmWave frequencies with the improved coverage of cell-free systems. However, to combat the…

Information Theory · Computer Science 2022-07-21 Jannik Brun , Victoria Palhares , Gian Marti , Christoph Studer

To support high data rate urgent or ad hoc communications, we consider mmWave UAV cellular networks and the associated challenges and solutions. To enable fast beamforming training and tracking, we first investigate a hierarchical structure…

Information Theory · Computer Science 2016-11-17 Zhenyu Xiao , Pengfei Xia , Xiang-Gen Xia

Given the overcrowding in the 300 MHz-3 GHz spectrum, millimeter wave (mmWave) spectrum is a promising candidate for the future generations of wireless networks. With the unique propagation characteristics at mmWave frequencies, one of the…

Signal Processing · Electrical Eng. & Systems 2018-04-11 Solmaz Niknam , Balasubramaniam Natarajan

Emerging applications involving device-to-device communication among wearable electronics require Gbps throughput, which can be achieved by utilizing millimeter wave (mmWave) frequency bands. When many such communicating devices are indoors…

Information Theory · Computer Science 2016-11-17 Kiran Venugopal , Matthew C. Valenti , Robert W. Heath

Sharing the spectrum among multiple operators seems promising in millimeter wave (mmWave) systems. One explanation is the highly directional transmission in mmWave, which reduces the interference caused by one network on the other networks…

Information Theory · Computer Science 2016-05-03 Abhishek K. Gupta , Ahmed Alkhateeb , Jeffrey G. Andrews , Robert W. Heath,

We provide a comprehensive overview of mathematical models and analytical techniques for millimeter wave (mmWave) cellular systems. The two fundamental physical differences from conventional Sub-6GHz cellular systems are (i) vulnerability…

Information Theory · Computer Science 2016-11-17 Jeffrey G. Andrews , Tianyang Bai , Mandar Kulkarni , Ahmed Alkhateeb , Abhishek Gupta , Robert W. Heath

This paper study the effect of interference management arising due to millimeter wave (mmWave) communication on the performance of multiple input multiple output (MIMO) based spectrum sharing cognitive systems. The highly directed mmWave…

Information Theory · Computer Science 2018-06-26 Abhishek Agrahari , Aditya K. Jagannatham

Millimeter wave (mmWave) cellular systems will enable gigabit-per-second data rates thanks to the large bandwidth available at mmWave frequencies. To realize sufficient link margin, mmWave systems will employ directional beamforming with…

Information Theory · Computer Science 2015-06-18 Ahmed Alkhateeb , Omar El Ayach , Geert Leus , Robert W. Heath

Based on the distinguishing features of multi-tier millimeter wave (mmWave) networks such as different transmit powers, different directivity gains from directional beamforming alignment and path loss laws for line-of-sight (LOS) and…

Information Theory · Computer Science 2018-01-09 Siqing Xiong , Lijun Wang , Kyung Sup Kwak , Zhiquan Bai , Jiang Wang , Qiang Li , Tao Han

In a cell-free massive MIMO architecture a very large number of distributed access points simultaneously and jointly serves a much smaller number of mobile stations; a variant of the cell-free technique is the user-centric approach, wherein…

Signal Processing · Electrical Eng. & Systems 2019-03-28 Mario Alonzo , Stefano Buzzi , Alessio Zappone , Ciro D'Elia

Millimeter wave (mm-wave) communications is considered a promising technology for 5G networks. Exploiting beamforming gains with large-scale antenna arrays to combat the increased path loss at mm-wave bands is one of its defining features.…

Information Theory · Computer Science 2017-04-21 Xianghao Yu , Jun Zhang , Martin Haenggi , Khaled B. Letaief

Millimeter wave (mmWave) has great potential in realizing high data rate thanks to the large spectral channels. It is considered as a key technology for the fifth generation wireless networks and is already used in wireless LAN (e.g., IEEE…

Information Theory · Computer Science 2015-11-11 Vutha Va , Junil Choi , Robert W. Heath

Multi-cell wireless systems usually suffer both intra-cell and inter-cell interference, which can be mitigated via coordinated multipoint (CoMP) techniques. Previous works on multi-cell analysis for the microwave band generally consider…

Information Theory · Computer Science 2018-03-13 Shu Sun , Theodore S. Rappaport , Mansoor Shafi

We consider a cellular network, where the uplink transmissions to a base station (BS) are interferenced by other devices, a condition that may occur, e.g., in cell-free networks or when using non-orthogonal multiple access (NOMA)…

Information Theory · Computer Science 2023-05-01 Stefano Tomasin , Raphael Hasler , Antonia M. Tulino , Matilde Sánchez-Fernández