Results 21 to 30 of about 262,424 (257)
Maximizing Cognitive Radio Networks Throughput Using Limited Historical Behavior of Primary Users
IEEE Access, 2018 Cognitive radios (CRs) mainly aim to reuse the spectrum holes in order to efficiently utilize the available scarce radio spectrum. However, current CRs techniques have a throughput limitation problem which ultimately limits telecommunication applications
Srinivasa Kiran Gottapu +3 more
doaj +1 more source
An Efficient Location Privacy-Preserving Authentication Scheme for Cooperative Spectrum Sensing
IEEE Access, 2020 In cognitive radio networks, cooperative spectrum sensing can improve the performance of spectrum utilization and accuracy of spectrum result. However, it suffers from security and privacy threats.
Huibin Lai, Li Xu, Yali Zeng
doaj +1 more source
Power Allocation Algorithm of CR-NOMA System Under Imperfect SIC [PDF]
Jisuanji gongcheng, 2021 This paper presents a study on the total transmission rate of secondary users in a Cognitive Radio(CR) Non-Orthogonal Multiple Access(NOMA) hybrid system under imperfect Successive Interference Cancellation(SIC).
ZHOU Shuo, QIU Runhe
doaj +1 more source
On the coexistence of a primary user with an energy harvesting secondary user: a case of cognitive cooperation [PDF]
Wireless Communications and Mobile Computing, 2014 AbstractIn this paper, we consider a cognitive scenario where an energy harvesting secondary user shares the spectrum with a primary user. The secondary source helps the primary source in delivering its undelivered packets during periods of silence of the primary source. The primary source has a queue for storing its data packets, whereas the secondary
Ahmed El Shafie 0001 +3 more
openaire +5 more sources
A New Protocol for Cooperative Spectrum Sharing in Mobile Cognitive Radio Networks [PDF]
Radioengineering, 2015 To optimize the usage of limited spectrum resources, cognitive radio (CR) can be used as a viable solution. The main contribution of this article is to propose a new protocol to increase throughput of mobile cooperative CR networks (CRNs).
S. A. Hosseini +2 more
doaj
Transport and Telecommunication, 2018 Cognitive Radio Networks (CRN) were introduced as a means to more efficiently reuse the licensed radio frequency spectrum. One of their salient features is the ability of unlicensed nodes to dynamically adapt their radio parameters according to their ...
Benghabrit Nawel, Kaddour Mejdi
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Acute lymphoblastic leukemia (ALL) is the most common pediatric cancer, with an overall survival now surpassing 90% in developed countries. However, treatments are not without adverse effects. In this study, we apply the severe toxicity‐free survival (STFS) framework to determine the prevalence of 21 physician‐defined severe ...
Lane Collier +10 more
wiley +1 more source
Dynamic Spectrum Access With Physical Layer Security: A Game-Based Jamming Approach
IEEE Access, 2018 The paper investigates the issue of physical layer security in spectrum overlay networks. First, in order to enhance security performance of the primary system, the secondary users are motivated to act as friendly jamming nodes with the compensation of ...
Yanjun Yao +3 more
doaj +1 more source
Efficient Channel Allocation using Matching Theory for QoS Provisioning in Cognitive Radio Networks
Sensors, 2020 The focus of research efforts in cognitive radio networks (CRNs) has primarily remained confined to maximizing the utilization of the discovered resources. However, it is also important to enhance the user satisfaction in CRNs by finding a suitable match
Muddasir Rahim +8 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background General pediatricians often evaluate hematologic and oncologic presentations before subspecialty consultation, yet the 2025 Accreditation Council for Graduate Medical Education (ACGME) pediatric requirements reduce inpatient pediatric hematology/oncology (PHO) time, raising questions about resident readiness.
Colburn Yu, Rohini Jain
wiley +1 more source