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25 articles for “cognitive radios”
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A Review Paper on Cooperative Spectrum Sensing (CSS) Techniques for Cognitive Radio Applications:
Abstract: Cognitive radio is the best solution for the spectrum scarcity and spectrum underutilization problem in wireless communication system, because of its ability to rapidly and automatically adapt operating parameters as per requirements and conditions. In this paper, a literature review of cooperative spectrum sensing techniques for cognitive radio is presented. In Cognitive radio, spectrum sensing is the main function which prevents the interference with the Primary Users (PU) and identifies …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 16–24 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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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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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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ED-SS based Cognitive Radio (CR) over Rayleigh Fading Channel and the Performance of Optimized Cooperative Spectrum Sensing Technique for Modern Wireless Communications
Abstract: Cognitive Radio (CR) has indeed been shown to be a superior way to address the issue of spectrum scarcity in which every wireless system occupies the limited bandwidth spectrum (LBS) allotting to the licensed users. Spectrum holes, which are approximated using spectrum sensing, occur when this LBS is empty in a certain location at a specific moment (SS). The SS is the main objective of CR and various SS techniques …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 2, 2022 · pp. 1–12 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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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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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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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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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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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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Maximization of Spectrum Efficiency Using PSO, HPSO-GA Algorithms for Cognitive Radio
Abstract: A cognitive radio (CR) is an intelligent radio that can be programmed and configured dynamically. Its transceiver is designed to use the best wireless channels in its vicinity. Such a radio automatically detects available channels in wireless spectrum by the process of spectrum sensing, then accordingly changes its transmission or reception parameters to allow more concurrent wireless communications in a given spectrum band at one location. This paper discusses the …
Published in Recent Trends in Sensor Research & Technology · Vol. 3, Issue 2, 2016 · pp. 19–28 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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Clipping of Precoded OFDM in Cognitive Radios
Abstract: To provide reliable and opportunistic utilization of the radio electromagnetic spectrum, cognitive radio (CR) has been proposed as an intelligent technology that provides dynamic spectrum access for users by opportunistically utilizing even the licensed spectral bands. Orthogonal frequency division multiplexing (OFDM) is considered by many to be an effective multicarrier transmission technique for the implementation of CR system transmissions due to its flexible spectrum access. Out-of-band (OOB) radiation of an …
Published in Current Trends in Signal Processing · Vol. 4, Issue 3, 2014 · pp. 1–7 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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Study of Spectrum Sensing Techniques for OFDM-based Cognitive Radio
Abstract: Nowadays OFDM (Orthogonal Frequency Division Multiplexing) techniques are adopted by many existing or progressing wireless communication standards. OFDM’s sensing and spectrum shaping capabilities together with its flexibility and adaptivity make it the best transmission technology for CR system. Spectrum sensing helps to detect the spectrum holes (unutilized bands of the spectrum) providing high spectral resolution capability. Thus, a robust spectrum sensing algorithm for OFDM modulated signals is highly decide to …
Published in Recent Trends in Electronics Communication Systems · Vol. 1, Issue 1, 2014 · pp. 25–31 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 Smart System to Control the Hazardous Gases in the Environment
Abstract: Industries and vehicles are very important pillars of human beings growth in each field like games, music, power, war etc. With the advantage of making lives easy they also have some disadvantages. These disadvantages are in various forms but the most effective disadvantage is in the form of hazardous wastes. Both industries and vehicles produce toxic air particles and gases. These air particles and gases cause various airborne diseases and …
Published in Journal of Microcontroller Engineering and Applications · Vol. 4, Issue 1, 2017 · pp. 7–11 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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Machine Learning–Guided Cognitive RF System with Dynamic FFT Resolution and Multiplier Reconfiguration for Adaptive Anti-Jamming Communication
Abstract: This paper presents a hierarchical adaptive RF communication system that integrates signal quality-based pre- processing with machine learning-driven signal classification to achieve robust and resource-efficient operation in dynamic, interference-prone environments. Unlike prior art that addresses adaptive RF, ML classification, or anti-jamming individually, this work uniquely combines real-time SNR/RSSI-based signal strength estimation with dynamic FFT size selection (64-, 256- , or 512-point) and arithmetic-level multiplier reconfiguration (CORDIC, Distributed Arithmetic, and hybrid …
Published in International Journal of Radio Frequency Innovations · Vol. 4, Issue 1, 2026 Read article