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Cell-free massive MIMO improves the fairness among the user equipments (UEs) in the network by distributing many cooperating access points (APs) around the region while connecting them to a centralized cloud-computing unit that coordinates…

Signal Processing · Electrical Eng. & Systems 2024-12-05 Ozan Alp Topal , Özlem Tuğfe Demir , Emil Björnson , Cicek Cavdar

Today, deployment of optical fiber has offered large transmission capacity which cannot be efficiently utilized by the electronic switches. Rather, Integrated Hybrid Optical Network (IHON) is a promising approach which combines both packet…

Networking and Internet Architecture · Computer Science 2019-11-19 Dawit Hadush Hailu , Gebrehiwet Gebrekrstos Lema , Gebremichael T. Tesfamariam

The anticipated launch of the Sixth Generation (6G) of mobile technology by 2030 will mark a significant milestone in the evolution of wireless communication, ushering in a new era with advancements in technology and applications. 6G is…

Networking and Internet Architecture · Computer Science 2024-06-04 Abdulhalim Fayad , Tibor Cinkler , Jacek Rak

Photonic data routing in optical networks overcomes the limitations of electronic routers with respect to data rate, latency, and energy consumption while suffering from dynamic power consumption, non-simultaneous usage of multiple…

As a promising paradigm for fifth generation (5G) wireless communication systems, cloud radio access networks (C-RANs) have been shown to reduce both capital and operating expenditures, as well as to provide high spectral efficiency (SE)…

Information Theory · Computer Science 2016-11-15 M. Peng , C. Wang , V. Lau , H. V. Poor

Network densification, massive multiple-input multiple-output (MIMO) and millimeter-wave (mmWave) bands have recently emerged as some of the physical layer enablers for the future generations of wireless communication networks (5G and…

Signal Processing · Electrical Eng. & Systems 2019-02-21 Guillem Femenias , Felip Riera-Palou

Cell-free massive MIMO (multiple-input multiple-output) enhances spectral and energy efficiency compared to conventional cellular networks by enabling joint transmission and reception across a large number of distributed access points…

Signal Processing · Electrical Eng. & Systems 2026-02-10 Özlem Tuğfe Demir , Emil Björnson

One of the major challenges with cell-free (CF) massive multiple-input multiple-output (MIMO) networks is providing backhaul links for a large number of distributed access points (APs). In general, providing fiber optics backhaul for these…

Information Theory · Computer Science 2023-07-25 Ali Hosseinalipour Jazi , S. Mohammad Razavizadeh , Tommy Svensson

In this paper, we study the problem of joint inband backhauling and interference mitigation in 5G heterogeneous networks (HetNets) in which a massive multiple-input multipleoutput (MIMO) macro cell base station equipped with a large number…

Networking and Internet Architecture · Computer Science 2017-05-24 Trung Kien Vu , Mehdi Bennis , Sumudu Samarakoon , Merouane Debbah , Matti Latva-aho

The fronthaul (FH) is an indispensable enabler for 5G networks. However, the classical fronthauling method demands for large bandwidth, low latency, and tightly synchronized on the transport network, and only allows for point-to-point…

Information Theory · Computer Science 2016-11-15 Jingchu Liu , Shugong Xu , Sheng Zhou , Zhisheng Niu

Only radio access networks can provide connectivity across multiple antenna sites to achieve the great leap forward in capacity targeted by 5G. Optical fronthaul remains a sticking point in that connectivity, and we make the case for analog…

Networking and Internet Architecture · Computer Science 2021-07-13 Xun Guan , Wei Shi , Jia Liu , Peng Tan , Jim Slevinsky , Leslie A. Rusch

This paper considers the uplink of a cloud radio access network (C-RAN) comprised of several multi-antenna remote radio units (RUs) which send the data that they received from multiple mobile users (MUs) to a central unit (CU) via a…

Information Theory · Computer Science 2017-04-20 Marzieh Najafi , Vahid Jamali , Derrick Wing Kwan Ng , Robert Schober

We analyze the uplink performance of a distributed massive multiple-input multiple-output (MIMO) architecture in which the remotely located access points (APs) are connected to a central processing unit via a fiber-optical fronthaul…

Information Theory · Computer Science 2024-05-30 Anzhong Hu , Lise Aabel , Giuseppe Durisi , Sven Jacobsson , Mikael Coldrey , Christian Fager , Christoph Studer

We simultaneously achieve clock synchronisation, clock-synchronised data transmission and ultra-low noise RF carrier generation by combining clock phase caching and frequency comb transmission in radio access networks (RAN). We demonstrate…

Systems and Control · Electrical Eng. & Systems 2025-06-09 Kari Aaron Clark , Zun Htay , Zichuan Zhou , Amany Kassem , Andrea Pertoldi , Benjamin Rudin , Florian Emaury , Izzat Darwazeh , Zhixin Liu

The 5G wireless network architecture will bring dense deployments of base stations called {\em small cells} for both outdoors and indoors traffic. The feasibility of their dense deployments depends on the existence of a high data-rate…

Information Theory · Computer Science 2015-08-04 Song-Nam Hong , Ivana Maric , Dennis Hui

In the Fifth generation (5G) wireless communication systems, a majority of the traffic demands is contributed by various multimedia applications. To support the future 5G multimedia communication systems, the massive multiple-input…

Information Theory · Computer Science 2016-11-11 Xiaohu Ge , Haichao Wang , Ran Zi , Qiang Li , Qiang Ni

We consider a cell-free massive multiple-input multiple-output (mMIMO) network, where unmanned aerial vehicles (UAVs) equipped with multiple antennas serve as distributed UAV-access points (UAV-APs). These UAV-APs provide seamless coverage…

Signal Processing · Electrical Eng. & Systems 2025-02-10 Neetu R. R , Ozan Alp Topal , Özlem Tuğfe Demir , Emil Björnson , Cicek Cavdar , Gourab Ghatak , Vivek Ashok Bohara

Highly dynamic and mobile applications, such as vehicular networks, require stable connectivity, which is often challenging to achieve. Network densification is a key approach to address this issue and can be achieved cost-effectively…

Networking and Internet Architecture · Computer Science 2026-04-10 Chiara Rubaltelli , Marcello Morini , Eugenio Moro , Ilario Filippini

This letter investigates the problem of providing gigabit wireless access with reliable communication in 5G millimeter-Wave (mmWave) massive multiple-input multiple-output (MIMO) networks. In contrast to the classical network design based…

Networking and Internet Architecture · Computer Science 2019-08-16 Trung Kien Vu , Mehdi Bennis , Merouane Debbah , Matti Latva-aho , Choong Seon Hong

Network virtualization and cloudification in Open Radio Access Networks (O-RAN) enable joint orchestration of the processing and fronthaul resources, which are essential for realizing the energy-saving potential of cell-free massive MIMO…

Signal Processing · Electrical Eng. & Systems 2026-04-07 Ozan Alp Topal , Özlem Tuğfe Demir , Emil Björnson , Cicek Cavdar