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15 articles for “cognitive radio networks”
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Study of Cooperative Spectrum Sensing Techniques in Cognitive Radio Networks
Abstract: Cognitive radio is key enabling technology that enables next generation communication networks, also known as dynamic spectrum access network, to utilize the spectrum more efficiently in an opportunistic fashion without interfering with the licensed user. Its roots came from the discovery by regulatory bodies in various countries, which found that most of the radio frequency spectrum was inefficiently utilized. This was the reason for allowing unlicensed users to utilize licensed …
Published in Current Trends in Signal Processing · Vol. 7, Issue 1, 2017 · pp. 35–41 Read article
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Heterogeneous Spectrum Sensing in Cognitive Radio Network using Enhanced Energy Detection and Matched Filter
Abstract: AbstractOne of the most predominant aspect in cognitive radio networks is spectrum sensing which allows a secondary user (unlicensed user) to detect the presence or absence of a primary user (licensed user). A number of sensing techniques have been proposed in the past. In order to achieve a high spectrum efficiency, the compatibility of the common spectrum detection techniques primarily used such as energy detection and matched filter are employed …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 3, 2017 · pp. 35–42 Read article
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Artificial Intelligence based hierarchical Cognitive Radio Network
Abstract: Faced with ever-increasingly complex communication network architectural difficulties and rising traffic demand across wireless systems, cognitive radio (CR) technology alone is insufficient for dynamic spectrum resource allocation in 5th-generation (5G) networks. A distributed cognitive cellular network is presented in this research work for an efficient real-time procedure, which merges artificial intelligence with CR technology into a sophisticated multi-agent system (MAS). It is a new approach to 5G cellular communication networks. …
Published in Journal of Artificial Intelligence Research & Advances · Vol. 8, Issue 2, 2021 · pp. 13–21 Read article
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A Survey on Cognitive Radio Ad Hoc Network Architecture
Abstract: Cognitive radio ad hoc networks (CRAHNs) represent an innovative paradigm in wireless communication, leveraging the dynamic spectrum access capabilities of cognitive radios (CRs) to enhance network performance and spectrum efficiency. The architecture of CRAHNs integrates cognitive radio capabilities with ad hoc networking principles, enabling devices to manage spectrum resources autonomously and intelligently in a decentralized manner. This abstract outlines the key components and functionalities of CRAHN architecture, highlighting its potential …
Published in Journal of Communication Engineering & Systems · Vol. 14, Issue 3, 2024 · pp. 1–7 Read article
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Diminution of Co-channel Interference in Femtocell Networks
Abstract: In the field of telecommunications, a femtocell is defined as a low-power cellular base station that is typically designed for use in a home or small business. A broader term which is more widespread in the industry is small cell, with femtocell as a subset. It acts as a service provider that allows to extend service coverage indoors or at the cell edge, especially where access would otherwise be limited …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 1, Issue 1, 2014 · pp. 24–30 Read article
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Performance Enhancement of Cognitive Radio Spectrum Sharing (CRSS) with MIMO System
Abstract: A key challenge in operating cognitive radios (CRs) in a self-organizing (ad hoc) network is to adaptively and efficiently allocate transmission powers and spectrum among CRs according to the surrounding environment. Cognitive radio networks will provide high bandwidth to mobile users via heterogeneous wireless architectures and dynamic spectrum access techniques. CR networks inflict challenges due to the fluctuating nature of the available spectrum, as well as the diverse QoS requirements …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 2, Issue 3, 2015 · pp. 13–18 Read article
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Analysis and Application of Cognitive Radio on 4G Communications
Abstract: AbstractNowadays network services are available anywhere and anytime through the advancement in wireless communication technology. Several technology and generation are introduced for wireless communication such as 2.5G, 3G etc. But for faster and reliable communication wireless generations are improved—4G technology is one of them. 4G communication systems are being developed to solve the various problems faced by the current communication systems (3G, 2.5G). 4G will be an intelligent technology that …
Published in Journal of Communication Engineering & Systems · Vol. 4, Issue 3, 2014 · pp. 1–8 Read article
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Analysis and Comparison of Optimization Techniques for Interference Duration in Cognitive Radio
Abstract: Cognitive radio provides opportunity to unlicensed users to use the licensed spectrum when it is not being used. Cognitive radio has several common radio performance parameters, out of which here we analyze the interference duration. Here we used genetic algorithm, particle swarm algorithm, bat algorithm based optimization techniques for the optimization of interference duration in cognitive radio. Interference duration converges to 3.08, 1.7 and 0.1534 μs corresponding to genetic algorithm, …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 3, Issue 3, 2016 · pp. 1–8 Read article
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Analysis of Cognitive Radio Spectrum Sensing Algorithms Using Various Noise Channels
Abstract: As we know that now a day’s there is a huge advancement in wireless communication and its applications, efficient use of spectrum has been a great issue for researchers. Due to such issue, development in cognitive radio (the intelligent network) has been in demand which will analyze the spectrum to increase its efficiency by utilizing it properly. This paper focuses on sensing the spectrum in order to find out the …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 2, Issue 2, 2015 · pp. 11–16 Read article
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Modified Binary Firefly Algorithm (MBFA) for Optimal Allocation of Spectrum in Cognitive Radio Systems
Abstract: Spectrum bands are nature’s communication highways which are highly congested now-adays. To overcome this problem, dynamic allocation of spectrum is under consideration over the current fixed spectrum allotment policy. In dynamic allotment, various optimisation methods can be applied for achieving the best possible spectrum allotment during handover so that the better quality of service can be given to cognitive users with the simultaneous improvement in spectrum utilisation. This study focuses …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 3, Issue 2, 2016 · pp. 42–47 Read article
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Performance Analysis of DS-CDMA Based Spectrum Sensing in Cognitive Radio
Abstract: In the near future cognitive radio technology will be the efficient one in bandwidth utilization. It is a promising technology that enables a user to use both licensed and unlicensed spectrums. The licensed spectrum can be used depending on the channel assignment strategy of a particular wireless communication standard. But the unlicensed spectrum can be effectively used with a memorandum of agreement whenever it is idle. To predict the availability …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 2, Issue 1, 2015 · pp. 16–22 Read article
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Optimization of Sensing Parameters Using PSO, GAAlgorithms for Cognitive Radio
Abstract: Cognitive Radio (CR) is an emerging technology, which has the potential of being a disruptive technology, and will enable the future wireless world. In this radio, spectrum sensing is an appropriate tool to study surrounding environment in order to illustrate the suitable scenario for sharing spectrum between users.The main objective of spectrum sensingis to provide more spectrum access opportunities to cognitive radio users without interfering with the operations of the …
Published in Recent Trends in Sensor Research & Technology · Vol. 2, Issue 3, 2015 · pp. 23–30 Read article
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Performance Analysis of IEEE 802.22 Wireless Regional Area Network with Different Modulation Schemes and Code Rates: A Review
Abstract: Abstract: The wireless regional area network (WRAN) is an IEEE 802.22 standard. It operates in the very high frequency and ultra-high frequency range. It works on the principle of cognitive radio. The basic objective of WRAN is to sense the available frequency spectrum and assign this sensed frequency to the secondary user. The performance of the network strongly depends on the wireless environment and different channel conditions. In this paper, …
Published in Journal of Mobile Computing, Communications & Mobile Networks · Vol. 6, Issue 3, 2019 · pp. 12–17 Read article
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Fuzzy Based Opportunistic Power Control Strategy for Cognitive Radio with Compressive Sensing
Abstract: Cognitive radio is an intelligent communication technology that allows secondary users to utilize licensed band opportunistically and helps in resolving the issue of spectrum scarcity. In spectrum sharing network, where the secondary user can communicate simultaneously along with primary user in the same frequency band, the main challenge to opportunistic radio spectrum access lies in finding balance between two conflicting goalsof satisfying performance requirements while minimizing interference. In this paper,the …
Published in Recent Trends in Sensor Research & Technology · Vol. 2, Issue 3, 2015 · pp. 14–22 Read article
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An overview of Technologies for the Smart Grid
Abstract: There is broad unanimity regarding the need to enhance the smart grid (SG). To deliver a reliable electricity supply, the SG combines electrical grids and communication infrastructures to create an intelligent electricity network. Numerous cutting-edge communication technologies with the potential to considerably raise the general effectiveness of power grids have been identified for SG applications. The challenges and uses of communication technology in Singapore are covered in this study. Three …
Published in Journal of Communication Engineering & Systems · Vol. 12, Issue 2, 2022 · pp. 25–36 Read article