Results 71 to 80 of about 531 (199)

All-Optical Generation of Two IEEE802.11n Signals for 2 $\times$ 2 MIMO-RoF via MRR System

IEEE Photonics Journal, 2014
A radio-over-fiber system capable of very spectrally efficient data transmission and based on multiple-input multiple-output (MIMO) and orthogonal frequency-division multiplexing (OFDM) is presented here.
I. S. Amiri, S. E. Alavi, N. Fisal, A. S. M. Supa'at, H. Ahmad   +4 more
doaj   +1 more source

Performance Optimization of SNR and SFDR in RoF Link for the Next Generation Networks

The Journal of Engineering, Volume 2025, Issue 1, January/December 2025.
Figure 1 showing the fundamental concept of RoF link designing over a dispersive medium. The complete RoF link is divided into three different sections. These sections are nominated as, central station (CS), optical distribution networks (ODN) and base station (BS). CS to BS conversation is called downlink transmission, while from BS to CS it is called
Balram Tamrakar, Varun Gupta, Shubham Shukla, Maaz Mahmood Siddique, Anurag Sinha, Md. Sazid Reza, Prachi Mishra, Radhika Gupta, Karan, Himanshu Singh, Ahmed Alkhayyat   +10 more
wiley   +1 more source

Using a $\hbox{Si}_{3}\hbox{N}_{4}$ Ring Resonator Notch Filter for Optical Carrier Reduction and Modulation Depth Enhancement in Radio-Over-Fiber Links

IEEE Photonics Journal, 2013
Optical carrier reduction via the use of a Si3N4 ring resonator notch filter (RRNF) is proposed and experimentally demonstrated as a means for improving the modulation efficiency in 10-GHz radio-over-fiber (RoF) links.
A. Perentos, F. Cuesta-Soto, A. Canciamilla, B. Vidal, L. Pierno, N. S. Losilla, F. Lopez-Royo, A. Melloni, S. Iezekiel   +8 more
doaj   +1 more source

Frequency Comb Effect on Chaos in Semiconductor Lasers, a Bifurcation Study

International Journal of Optics, Volume 2025, Issue 1, 2025.
This study investigates the effects of optical frequency comb injection on the chaotic dynamics of semiconductor lasers through a bifurcation analysis. By examining the behavior of semiconductor lasers under different comb parameters (i.e., the number of signals, comb spacing), the research explores how these factors influence the system’s transition ...
Najm M. Al-Hosiny, Haochong Huang
wiley   +1 more source

Latency analysis on W-band hybrid fiber-wireless link using software defined radio in real time

Revista Facultad de Ingeniería Universidad de Antioquia, 2018
This paper reports an experimental comparison and analysis of latency for different modulation techniques at different data rates in W-band Radio-over-Fiber (RoF) transmission links. In addition, a software defined radio called GNU-Radio is employed with
Mónica Andrea Rico-Martínez, Álvaro Morales-Vicente, Rafael Puerta-Ramírez, Víctor Mehmeri-Dantas, Idelfonso Tafur-Monroy, Gloria Margarita Varón-Durán   +5 more
doaj  

Power Over Fiber and Analog Radio Over Fiber Simultaneous Transmission Over Long Distance in Single Mode, Multicore, and Hollow Core Fibers

Laser &Photonics Reviews, Volume 18, Issue 8, August 2024.
Simultaneous Power over Fiber delivery and transmission of 5G New Radio over a single Hollow Core or Multicore Fiber is demonstrated at distances of ten kilometers, yielding promising results compared to Single Mode Fibers. Optically powering a Bluetooth Low Energy load while transmitting 256 QAM data on a 3 GHz RF signal with no degradation is ...
Rubén Altuna, Yongmin Jung, Periklis Petropoulos, Carmen Vázquez   +3 more
wiley   +1 more source

Investigating delay of the media access control protocols for IoT‐RoF using quantum entanglement

IET Networks, Volume 13, Issue 4, Page 324-337, July 2024.
IoT‐RoF QE‐based: MAC Protocol Delay Study. Abstract One of the significant challenges of the Radio over fibre (RoF) Medium Access Control (MAC) protocol is the propagation delay. This delay can lead to serious issues, such as higher propagation delay resulting in collisions and unnecessary retransmissions.
Shakir Salman Ahmad, Hamed Al‐Raweshidy, Rajagopal Nilavalan   +2 more
wiley   +1 more source

A novel intelligent approach for man‐in‐the‐middle attacks detection over internet of things environments based on message queuing telemetry transport

Expert Systems, Volume 41, Issue 2, February 2024.
Abstract One of the most common attacks is man‐in‐the‐middle (MitM) which, due to its complex behaviour, is difficult to detect by traditional cyber‐attack detection systems. MitM attacks on internet of things systems take advantage of special features of the protocols and cause system disruptions, making them invisible to legitimate elements.
Álvaro Michelena, José Aveleira‐Mata, Esteban Jove, Martín Bayón‐Gutiérrez, Paulo Novais, Oscar Fontenla Romero, José Luis Calvo‐Rolle, Héctor Aláiz‐Moretón   +7 more
wiley   +1 more source

Performance Analysis of DP‐QAM‐Based Optical OFDM PON Employing Optical Multicarrier

Journal of Engineering, Volume 2024, Issue 1, 2024.
This work proposes a new hybrid bidirectional standard single mode fiber (SSMF)/free space optical (FSO) dual polarization quadrature amplitude modulation (DP‐QAM) employing optical orthogonal frequency division multiplexing (OFDM). An optical multicarrier generator (OMG) source is utilized. The suggested model is simulated using VPI photonics software.
Ibrahim Luay, Tahreer Safa’a Mansour, Muhammad Nasir Khan   +2 more
wiley   +1 more source

Research Progress on Multi-dimensional Multi-order Modulation Technology in Radio over Fiber System

Guangtongxin yanjiu, 2023
Recently, Radio over Fiber (RoF) technology has become a hot research topic in the broadband communication access network field and has attracted much attention in the industry.
LI Yan-lin, SHAO Yu-feng, WANG An-rong, YU Ni, YANG Qi-ming, TIAN Qing, YI Lin-fang, LI Chong, CHEN Peng, LIU Shuan-fan, ZUO Ren-jie, YUAN Jie   +11 more
doaj