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The appearance of sixth-generation networks has resulted in the proposal of several solutions to tackle signal loss. One of these solutions is the utilization of reconfigurable intelligent surfaces (RIS), which can reflect or refract…

Information Theory · Computer Science 2023-04-11 Md. Mijanur Rahman , A. S. M. Badrudduza , Noor Ahmad Sarker , Md. Ibrahim , Imran Shafique Ansari

With the expanding demand for high data rates and extensive coverage, high throughput satellite (HTS) communication systems are emerging as a key technology for future communication generations. However, current frequency bands are…

Signal Processing · Electrical Eng. & Systems 2023-08-01 Malek Khammassi , Abla Kammoun , Mohamed-Slim Alouini

With the completion of standardization of fifth-generation (5G) networks, the researchers have begun visioning sixth-generation (6G) networks that are predicted to be human-centric. Hence, similar to 5G networks, besides high data rate,…

In this manuscript, two novel multi-hop relay-assisted hybrid Free Space Optical / Radio Frequency (FSO / RF) communication systems are presented and compared. In these structures, RF and FSO links, at each hop, are parallel and send data…

Signal Processing · Electrical Eng. & Systems 2018-11-21 Mohammad Ali Amirabadi

In this work, a hybrid free-space optics (FSO)/ teraHertz (THz) based backhaul network is considered to provide high-data rate reliable communication to the terrestrial mobile users (MUs) operating at millimeter wave (mmWave) bands. The FSO…

Signal Processing · Electrical Eng. & Systems 2022-11-14 Praveen Kumar Singya , Behrooz Makki , Antonio D'Errico , Mohamed-Slim Alouini

For decades, satellites have facilitated remote internet of things (IoT) services. However, the recent proliferation of increasingly capable sensors and a surge in the number deployed, has led to a substantial growth in the volume of data…

Networking and Internet Architecture · Computer Science 2024-08-20 Ethan Fettes , Pablo G. Madoery , Halim Yanikomeroglu , Gunes Karabulut Kurt , Colin Bellinger , Stéphane Martel , Khaled Ahmed , Sameera Siddiqui

The underlay cognitive radio-based hybrid radio frequency / free-space optical (RF / FSO) systems have been emerged as a promising technology due to its ability to eliminate spectrum scarcity and spectrum under-utilization problems.…

Information Theory · Computer Science 2021-11-15 Md. Ibrahim , A. S. M. Badrudduza , Md. Shakhawat Hossen , M. K. Kundu , Imran Shafique Ansari

Recent studies have shown that satellite communication (SatCom) will have a fundamental role in the next generation non-terrestrial networks (NTN). In SatCom, radio-frequency (RF) or free-space optical (FSO) communications can be used…

Signal Processing · Electrical Eng. & Systems 2021-12-01 Olfa Ben Yahia , Eylem Erdogan , Gunes Karabulut Kurt , Ibrahim Altunbas , Halim Yanikomeroglu

With its wide coverage and uninterrupted service, satellite communication is a critical technology for next-generation 6G communications. High throughput satellite (HTS) systems, utilizing multipoint beam and frequency multiplexing…

Signal Processing · Electrical Eng. & Systems 2025-08-04 Rui Chen , Wen-Xuan Long , Bing-Qian Wang , Yuan He , Rui-Jin Sun , Nan Cheng , Gan Zheng , Dusit Niyato

This paper investigates performance of a relay assisted hybrid Free Space Optical / Radio Frequency (FSO/RF) communication system. The proposed structure is particularly recommended anywhere that direct RF communication between mobile users…

Signal Processing · Electrical Eng. & Systems 2019-05-22 Mohammad Ali Amirabadi

In this paper, a novel dual-hop relay-assisted hybrid Free Space Optical / Radio Frequency (FSO / RF) communication system is presented. In this structure an access point connects users within the building to the Base Station via a hybrid…

Signal Processing · Electrical Eng. & Systems 2018-11-21 Mohammad Ali Amirabadi

Hybrid radio frequency (RF)/free space optical (FSO) systems are among the candidate enabling technologies for the next generation of wireless networks since they benefit from both the high data rates of the FSO subsystem and the high…

Information Theory · Computer Science 2016-08-10 Marzieh Najafi , Vahid Jamali , Robert Schober

Intelligent reflecting surface (IRS) is an emerging key technology for the fifth-generation (5G) and beyond wireless communication systems to provide more robust and reliable communication links. In this paper, we propose a mixed dual-hop…

Networking and Internet Architecture · Computer Science 2021-11-19 Gyan Deep Verma , Aashish Mathur , Yun Ai , Michael Cheffena

The field of satellite communications is enjoying a renewed interest in the global telecom market, and very high throughput satellites (V/HTS), with their multiple spot-beams, are key for delivering the future rate demands. In this article,…

Information Theory · Computer Science 2019-07-24 Ana I. Perez-Neira , Miguel Angel Vazquez , Sina Maleki , M. R. Bhavani Shankar , Symeon Chatzinotas

The prospect of mankind returning to the Moon has garnered a great amount of attention in recent years. Dozens of lunar missions are planned for the coming decade which will require the development of a sustainable communication…

Systems and Control · Electrical Eng. & Systems 2022-03-31 Waseem Raza , Ethan Abele , John OHara , Behnaz Sadr , Peter LoPresti , Ali Imran , Wooyeol Choi , Ickhyun Song , Serhat Altunc , Obadiah Kegege , Sabit Ekin

In recent years, free space optical communication has gained significant importance owing to its unique features: large bandwidth, license-free spectrum, high data rate, easy and quick deployability, less power and low mass requirements.…

Information Theory · Computer Science 2017-05-31 Hemani Kaushal , Georges Kaddoum

Free Space Optics (FSO) communication provides attractive bandwidth enhancement with unlicensed bands worldwide spectrum. However, the link capacity and availability are the major concern in the different atmospheric conditions. The…

Signal Processing · Electrical Eng. & Systems 2023-10-23 Gebrehiwet Gebrekrstos Lema

Free space optics (FSO) refers to optical wireless communications in outdoor environments. The aim of this paper is to analyze the role that FSO is envisaged to play in the creation of next-generation satellite networks. To begin with, the…

Signal Processing · Electrical Eng. & Systems 2020-10-08 Aizaz U. Chaudhry , Halim Yanikomeroglu

Our objective is to provide guaranteed packet delivery service in time constrained sensor networks. The wireless network is a highly variable environment, where available link bandwidth may vary with network load. Since multimedia…

Networking and Internet Architecture · Computer Science 2009-09-04 Saad Ahmad Khan , Sheheryar Ali Arshad

This paper investigates the performance of physical layer security (PLS) in fluid antenna-aided communication systems under arbitrary correlated fading channels. In particular, it is considered that a single fixed-antenna transmitter aims…

Information Theory · Computer Science 2024-09-18 Farshad Rostami Ghadi , Kai-Kit Wong , F. Javier Lopez-Martinez , Wee Kiat New , Hao Xu , Chan-Byoung Chae