Results 41 to 50 of about 387 (135)

Performance Analysis of Microwave Photonic Spectral Filters based on Optical Microcombs

Advanced Physics Research, Volume 4, Issue 1, January 2025.
A comprehensive analysis of microcomb‐based microwave spectral filters based on the transversal filter approach is presented. Theoretical limitations in the filter spectral response from finite tap numbers, experimental errors, and the influence of the input signal's bandwidth are all analyzed.
Yang Li, Yang Sun, Jiayang Wu, Guanghui Ren, Xingyuan Xu, Bill Corcoran, Sai Tak Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss   +10 more
wiley   +1 more source

Distributed remote antenna unit with selection‐based of (RoF‐IoT) paradigm: Performance improvement

IET Communications, Volume 19, Issue 1, January/December 2025.
Abstract Mixing the wireless medium with fiber optics can form a new communication system called a radio‐over‐fiber (RoF) network; it is a promising solution that can provide high bandwidth and a reliable connection between numerous sensors in wireless sensor networks (WSN) and the central office (base station) within a particular area.
Shakir Salman Ahmad, Hamed Al‐Raweshidy, Ahmed Alkhayyat   +2 more
wiley   +1 more source

Modulation Format Identification Based on Signal Constellation Diagrams and Support Vector Machine

Photonics, 2022
In coherent optical communication systems, where multiple modulation formats are mixed and variable, the correct identification of signal modulation formats provides the foundation for subsequent performance improvement using digital algorithms.
Zhiqi Huang, Qi Zhang, Xiangjun Xin, Haipeng Yao, Ran Gao, Jinkun Jiang, Feng Tian, Bingchun Liu, Fu Wang, Qinghua Tian, Yongjun Wang, Leijing Yang   +11 more
doaj   +1 more source

Opportunities, challenges and requirements for introducing space division multiplexing in fibre optical networks

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
The authors discuss opportunities, challenges and requirements for successful commercialisation of space division multiplexing (SDM) in optical networks. The authors consider recent developments in SDM technology and focus on the importance of different geometrical parameters when designing multi‐core fibres and on the design choices for shared SDM ...
Gabriele Di Rosa, Lutz Rapp
wiley   +1 more source

A Novel Cost-Effective and Distributed in-Band OSNR Monitoring Method Using Gaussian Process Regression

IEEE Photonics Journal, 2019
We propose and experimentally demonstrate a novel cost-effective and distributed in-band optical signal-to-noise ratio (OSNR) monitoring method using a widely tunable optical bandpass filter and optical power measurements, which employs the Gaussian ...
Chunjie Hu, Wei Li, Hao Zheng, Qiguang Feng, Qiang Zheng, You Wang   +5 more
doaj   +1 more source

DMIMO and Machine Learning Techniques for Enhanced BER and Data Rates in 5G Free‐Space Optical Communication

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
This study introduces a dual multiple‐input multiple‐output (MIMO) method to enhance bit error rate (BER) and Q‐factor in 5G free‐space optical (FSO) communication. By integrating spatial diversity, machine learning‐based modulation, and adaptive optical filters, the system achieves data rates up to 120 Gbps while improving signal quality by up to 80%.
Ramanababu Challapalli, Chitra Perumal, S. Ramana Kumar Joga, Chidurala Saiprakash, Theophilus A. T. Kambo Jr   +4 more
wiley   +1 more source

An Ultracompact OSNR Monitor Based on an Integrated Silicon Microdisk Resonator

IEEE Photonics Journal, 2012
Optical signal-to-noise ratio (OSNR) monitoring is essential for control and management of dynamic optical networks. Small footprint, low cost, and less power consumption are always desirable for such monitoring system.
Ke Xu, Yimin Chen, Chao Li, Xia Chen, Zhenzhou Cheng, Chi Yan Wong, Hon Ki Tsang   +6 more
doaj   +1 more source

Machine Learning–Based Multiparameter Performance Predictions of Ultra‐Dense WDM FSO–FTTx Systems Under Diverse Weather Conditions

International Journal of Optics, Volume 2025, Issue 1, 2025.
Free‐space optical (FSO) communication is vital for modern wireless systems due to its high data rates, energy efficiency, secure transmission, and cost‐effectiveness. However, weather‐induced attenuation, turbulence, and pointing errors affect performance.
Ashenafi Paulos Forsido, Demissie Jobir Gelmecha, Ram Sewak Singh, Sulaiman W. Harun   +3 more
wiley   +1 more source

Noise Suppression in Quadrature Phase-Shift-Keying-Oriented All-Optical Matching Systems Using Highly Nonlinear Fiber

Photonics
All-optical matching systems that detect and localize designated target sequences in input all-optical data sequences have attracted significant attention in all-optical processing.
Xin Li, Feiyang Ruan, Ying Tang, Tenglin Gao, Shanguo Huang   +4 more
doaj   +1 more source

Performance Analysis of Gray‐Coded DP‐16QAM MIMO‐FSO Systems With Coherent Detection and DSP Techniques

Journal of Computer Networks and Communications, Volume 2025, Issue 1, 2025.
The performance of a gray‐coded dual polarization‐16 quadrature amplitude modulation (DP‐16 QAM)–based multiple input multiple output (MIMO)‐FSO link using coherent detection and digital signal processing (DSP) is investigated. The MIMO link is used to mitigate geometric loss, atmospheric attenuation, and atmospheric turbulence.
Zinegnaw Libisework Gelaw, Pushparaghavan Annamalai, Hailu Dessalegn Ayalew, Eduardo Da Silva   +3 more
wiley   +1 more source