Results 51 to 60 of about 216,240 (267)
Throughput-Oriented Full-Duplex Cognitive Radio Network Parameter Optimization
International Journal of Antennas and Propagation, 2022 Full-duplex cooperative spectrum sensing (FD-CSS) is an important research field in the field of spectrum sensing. In the FD-CSS network, the secondary user (SU) senses the usage status of the authorized spectrum by the primary user (PU) through the ...
Haibin Jiang +3 more
doaj +1 more source
On the Capacity of a Class of MIMO Cognitive Radios
, 2007 Cognitive radios have been studied recently as a means to utilize spectrum in a more efficient manner. This paper focuses on the fundamental limits of operation of a MIMO cognitive radio network with a single licensed user and a single cognitive user ...
Sridharan, Sriram, Vishwanath, Sriram
core +2 more sources
Advanced Materials, EarlyView.This study reports the fabrication of MRI‐compatible elastomeric micro‐balloons via a multi‐step bubble casting process, where the monolithic elastomeric wall is selectively stiffened for reversible and controlled inflation and elasticity, depending on the target vessels for graded occlusion of cerebral arteries.
Jong Bin Kim +10 more
wiley +1 more source
CROSS LAYER BASED THROUGHPUT OPTIMIZATION IN COGNITIVE RADIO NETWORKS WITH EFFECTIVE CHANNEL SENSING SCHEMES [PDF]
ICTACT Journal on Communication Technology, 2010 Cognitive Radio technology is a novel and effective approach to improve utilization of the precious radio spectrum. Spectrum sensing is one of the essential mechanisms for cognitive radio (CR) and various sensing techniques are used by the secondary ...
T.Manimekalai +3 more
doaj
Multi-Radio Based Rendezvous Technique for Heterogeneous Cognitive Radio Sensor Network
Sensors, 2021 In a distributed cognitive radio (CR) sensor network, transmission and reception on vacant channels require cognitive radio nodes to achieve rendezvous.
Md. Tahidul Islam +2 more
doaj +1 more source
Communication Primitives in Cognitive Radio Networks
, 2017 Cognitive radio networks are a new type of multi-channel wireless network in which different nodes can have access to different sets of channels. By providing multiple channels, they improve the efficiency and reliability of wireless communication ...
Gilbert, Seth +2 more
core +1 more source
Cognitive radio networks with elastic traffic
Proceedings of the 8th Euro-NF Conference on Next Generation Internet NGI 2012, 2012 We model and evaluate an infrastructure based cognitive radio network where impatient unlicensed or secondary users (SUs) offer elastic traffic. The interference created by SUs to the licensed users is analyzed when the secondary network uses two different spectrum access schemes, the conventional random access scheme and a new scheme we refer to as ...
Jorge Martínez-Bauset +3 more
openaire +3 more sources
Advanced Materials, EarlyView.Molecular doping of conjugated polymers is fundamentally constrained by thermodynamic phase behavior. This Perspective reframes doping efficiency and stability in terms of miscibility limits, binodals, and solvus boundaries, highlighting the role of effective interaction parameters and charge transfer.
Somayeh Kashani +10 more
wiley +1 more source
Key technologies and research progresses in cognitive SWIPT
Dianxin kexue, 2020 The combination of cognitive radio (CR) and simultaneous wireless information and power transfer (SWIPT) has become one of the research hotspots in modern high-efficient cognitive radio communications.Firstly,the introduction of SWIPT and cognitive SWIPT
Xiaorong XU +4 more
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Optimal sensing performance for cooperative and non-cooperative cognitive radio networks
International Journal of Distributed Sensor Networks, 2017 Spectrum sensing has gained new aspects with the advent of cognitive radio and opportunistic spectrum access techniques. Spectrum sensing plays a vital role in cognitive radio networks, and its reliability determines the success of transmission.
Waqas Khalid, Heejung Yu
doaj +1 more source