Results 231 to 240 of about 108,306 (265)

Enhanced OFDM for fragmented spectrum use in 5G systems

Transactions on Emerging Telecommunications Technologies, 2014
ABSTRACTMost of the recent and emerging wireless systems have selected orthogonal frequency division multiplexing (OFDM) scheme as the basis for the physical layer due to its flexibility and robustness. OFDM is commonly considered also as the first candidate technology for advanced cognitive radio, dynamic spectrum use and fragmented coexistence ...
Loulou Alaaeddin, Renfors Markku
openaire   +1 more source

SFAB: Spectrum Fragment Agile Broadcast in Cognitive Radio Networks

IEEE Transactions on Cognitive Communications and Networking, 2017
To improve spectrum utilization, cognitive radio (CR) is introduced to detect and exploit available spectrum resources autonomously. The flexible spectrum use imposes special challenges on broadcast because different CR devices may have different available spectrum fragments at different locations.
Pei Huang, Chin-Jung Liu, Xi Yang, Li Xiao   +3 more
openaire   +1 more source

Effective Spectrum Utilization–based analysis of fragmentation aware spectrum allocation in elastic optical network

Journal of Optical Communications
Abstract This paper presents an innovative resource allocation strategy for Multi-Core Fiber (MCF)-based Space Division Multiplexing (SDM) enabled Elastic Optical Networks (EON). The methodology incorporates crosstalk (XT)-aware spectrum slice allocation, dynamic core selection, and Effective Spectrum Utilization (ESU) to alleviate ...
null Vasundhara, Amit Kumar, Abhilash Mandloi   +2 more
openaire   +1 more source

Spectrum fragmentation: Causes, measures and applications

Telecommunications Policy, 2017
Youngsun Kwon, Duk Kyu Park, Hongjai Rhee   +2 more
openaire   +1 more source

Energy Spectrum of Spontaneous Fission Fragments

Physical Review, 1954
Emilio Segrè, Clyde Weigand
openaire   +1 more source

Spectrum slicing-based fragmentation aware routing and spectrum allocation in elastic optical networks

Optical Switching and Networking, 2022
Huanlin Liu, Jie Ren, Yong Chen, Junling Hu, Chang Tang, Mingming Tang   +5 more
openaire   +1 more source

How America's fragmented approach to public safety wastes money and spectrum

Telecommunications Policy, 2007
Emergency responders such as firefighters, police, and paramedics depend on reliable and ubiquitous wireless communications. Failures in these communications systems can cost lives. Particularly since 9/11, there has been great concern about the possibility of failures due to lack of interoperability, and failures due to a shortage of public safety ...
openaire   +1 more source

Spectrum Fragmentation Management Approaches Considering Defragmentation

2020
Bijoy Chand Chatterjee, Eiji Oki
openaire   +1 more source

Oncologic emergencies and urgencies: A comprehensive review

Ca-A Cancer Journal for Clinicians, 2022
Bonnie Gould Rothberg, David E Gerber, Jason J Bischof   +2 more
exaly  

Hyper Competition and Excessive Spectrum Fragmentation

2014
Rohit Prasad, V. Sridhar
openaire   +1 more source