Cognitive Radio Research Paper

cognitive radio IEEE PAPER 2016




Advanced Signal Processing Seminar 2, SS 2016�Cognitive radio and location-aware wireless communications
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A selection of important papers on Cognitive Radio can be found on a website hosted by the IEEE Communications Society: http://www.comsoc.org/best-readings/cognitive-radio Motivation

Applications of Cognitive Radio Networks: Recent Advances and Future Directions
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Contemporary wireless networks must meet the ever increasing bandwidth requirements to assure the quality of service (QoS) to the end users. Cognitive radio (CR) technology with efficient electromagnetic spectrum management can achieve increased bandwidth

Novel Cooperative Policy For Cognitive Radio Networks: Stability Region and Delay Analysis
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Abstract:We consider a cognitive radio system that consists of primary user, secondary user, and their destinations. The secondary user has a relaying capability, ie, it transmits the relayed packets from the primary user. Unlike most of the previous works that restrict the

Active Interference Constraint Learning with Uncertain Feedback for Cognitive RadioNetworks
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Abstract:In this paper, an intelligent probing method for interference constraint learning is proposed to allow a centralized Cognitive Radio Network (CRN) to access the frequency band of a Primary User (PU) operating based on an Adaptive Coding and Modulation (

An Efficient Mac Protocol for Reducing Channel Interference and Access Delay in Cognitive Radio Wireless Mesh Networks
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Abstract�With the increase of wireless mesh networks, channel access, bandwidth usage and channel interferences are the major key issues of multi-channel WMNs and MAC specifications. The multi-radio, multi-channel wireless mesh networks (MR-MC-WMNs)

A Review: Spectrum sensing in Full Duplex Cognitive radio in MIMO
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Abstract-Here, in this paper spectrum sensing method is proposed for full duplex cognitive radio. Spectrum sensing performs essential part in spectrum allocation. Cognitive radio is the very useful option now a days, as the traffic of user increase and less spectrum is

Blind Spectrum Selection in a Decentralized Cognitive Radio Networks with Heterogeneous Applications
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Abstract In this paper, we consider a cognitive radio network in which the sensing ability of cognitive radio is limited and the channel statistics are not known as a priori information in the opportunistic spectrum access (OSA) framework. It is a special challenge to design a

COOPERATIVE RELAYING SPECTRUM SHARING IN COGNITIVE RADIO NETWORKS
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Abstract: Most of existing papers on cognitive relay networks with multiple primary user (PU) receivers consider the scenario where the PU receivers utilize the same spectrum band. Using orthogonal spectrum bands in cellular networks aims to reduce the interference

Optimization of Sensing Time in Energy Detector Based Sensing of Cognitive Radio Network
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Abstract In cognitive radio network, spectrum sensing methods detect the existence of primary users to utilize spectrum holes for secondary users. When it is found that there are no busy primary users then secondary users are allowed to transmit through the spectrum.

A Spectrum Handoff Scheme by Considering the Interference Probability in Cognitive Radio
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Abstract In cognitive radio networks, spectrum sensing is used to detect the spectral state of authorized users. In particular, upon detecting primary users (PUs) appearances, Secondary User (SU) vacates the channel and performs the spectrum handoff. In order to protect the

Performance Improvement of Mu-Mimo Downlink System And Cognitive Radio System Using Precoding Technique
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Abstract In communication systems, precoding for multi-user MIMO downlink and cognitive radio systems is considered. CR is a wireless system that communicates in an efficient and reliable manner by sensing the environment, building a predictive model of such

Performance Evaluation of the Opportunistic Spectrum Access in a Cognitive RadioNetwork with Imperfect Sensing
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Abstract:Cognitive radio networks have emerged as a promising technology to shift the actual paradigm of spectrum scarcity by allowing the cognitive users (secondary users) to use the licensed spectrum on an opportunistic basis. A continuous-time Markov chain (

Performance Modeling of Finite-Source Cognitive Radio Networks
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Abstract This paper deals with performance modeling aspects of radio frequency licensing. The utilization of mobile cellular networks can be increased by the idea of the cognitive radio. Licensed users (Primary Users-PUs) and normal users (Secondary Users-SUs) are

Review Paper on Spectrum Sensing in Cognitive Radio
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Abstract�Cognitive Radio has become more prominent technology over time for the solution of spectrum scarcity problem in wireless communication. It is hard to imagine life without wireless applications and wireless devices. This results into increase in number of users

Energy-Efficient Resource Allocation for OFDM-Based Cognitive Radio Networks with Imperfect Spectrum Sensing
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Abstract In this study, energy-efficient (EE) resource allocation in orthogonal frequency division multiplexing-based cognitive radio networks with imperfect spectrum sensing is investigated. We present a new EE model by considering the sensing errors. Optimizing

Out of Band Radiation Control in OFDM Based Cognitive Radio Systems
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Abstract: Out of band radiation is one of the research challenges in Orthogonal Frequency Division Multiplexing (OFDM) based Cognitive Radio Systems. Power control is also an important issue in Cognitive Platform. In this paper, performance of soft window and Joint

Throughput Analysis in Cognitive Radio Networks Using Slotted Aloha Protocol with Imperfect Sensing
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Abstract:This paper introduces an extension of a methodology for calculating the throughput in a cognitive radio network using the slotted aloha technique for medium access. This extension includes two new aspects: imperfect sensing and different

A Combined Framework for Routing and Channel Allocation for Dynamic Spectrum Sharing using Cognitive Radio
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Abstract With the increase in wireless communication, the necessary resources needed are getting scarcer. One of the resources is a spectrum. The electromagnetic spectrum is a natural resource that cannot be produced or destroyed. They should be used optimally. In

Cooperative Spectrum Sharing in Cognitive Radio Networks: A Centralized Contracted-Based Approach
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Abstract In this paper, we study the relay-based communication schemes for cooperative spectrum sharing among multiple primary users (PUs) and multiple secondary users (SUs) with incomplete information. Inspired by contract theory, we model the network as a labor

Design of Dual-Band Bandpass Filters for Cognitive Radio Application of TVWS Band
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Abstract This paper presents a novel design for dual-band bandpass filters. The proposed filters are applicable to the carrier aggregation of the TV white space (TVWS) band and long- term evolution (LTE) band for cognitive radio applications. The lower passband is the

CQS: Heuristics to Capitalize on Quality of Service for Cooperative Underlay Spectrum Sensing in Cognitive Radio Ad hoc Networks
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Abstract Adaptive spectrum usage in cognitive radio networks is a critical research objective that attracting the attention of the researchers over a decade. The issues aimed to resolve in this domain are spectrum scheduling between primary and secondary users, achieving

Spectrum Handoff in Cognitive Radio Network
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Abstract: Rapid development of wireless networking technology has raised a large demand for spectrum band. Cognitive radio networks (CRNs) offer a solution for spectrum scarcity problem by means of dynamic spectrum access. Cognitive radio technology is an

MIMO Cognitive Radio Spectrum Sharing Using Spatial Coding and User Scheduling for Fading Channels
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Abstract Spectrum scarcity is one of the issue in wireless communication. Dynamic spectrum sharing is the solution for this problem in which the underutilized spectrums are utilized efficiently. Multiple Input Multiple Output (MIMO) based cognitive radio using spatial

Dynamic Spectrum Access in Cognitive Radio Wireless Sensor Networks Using Different Spectrum Sensing Techniques
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Abstract Cognitive Radio Wireless Sensor Networks are emerging technology which provides cognitive capabilities to Wireless Sensor Networks. WSN operates in unlicensed band. Same spectrum band is shared by other wireless devices like Wi-Fi and Bluetooth.

Analysis of Spread Spectrum Techniques in Cognitive Radio Networks
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Abstract Cognitive Radio (CR) is another technology in which a framework can sense its surroundings and adjust to the new working parameters to improve the transmission quality. A flexile and versatile physical (PHY) layer is required to execute the previously stated

Implementing A Simulator of Wireless Cognitive Radio Network Primary Users
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Abstract The purpose of this paper is to present to the academic community the design of a possible simulator for Wireless Cognitive Radio Network Primary Users. Throughout the paper we present the flowcharts developed in Matlab in order to design and build the

Various Sensing Techniques in Cognitive Radio Networks: A Review
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Abstract Cognitive radio networks (CRN) is IEEE 802.22 standards, also known as 5-G wireless technology. CRN carries primary users (PU) or licensed users and secondary users (CR) or un-licensed users. In this paper, we have presented an overview of CRN, further

MISBEHAVIOUR NODE PREDICTION BY USING STATE MACHINE ALGORITHM IN COGNITIVE RADIO NETWORK
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Abstract-Anomaly based intrusion detection system for IEEE 802.11 wireless networks based on behavioral analysis by detecting deviations which behaves normally that are triggered by wireless network attacks. The system uses a set of rules and signatures to

Spectrum sensing algorithms and software-defined radio implementation for cognitive radiosystems
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The scarcity of spectral resources in wireless communications, due to a fixed frequency allocation policy, is a strong limitation to the increasing demand for higher data rates. However, measurements showed that a large part of frequency channels are underutilized

Reliable spectrum sharing management for cognitive radio networks
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Abstract:Cognitive Radio Network (CRN) is a promising network that aims to improve the utilization of the wireless spectrum by enabling unlicensed (secondary) users to reuse the underutilized bands. CRN utilization of residual spectrum bands of Primary (licensed)

SURVEY ON COGNITIVE RADIO ROUTING PROTOCOLS
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Abstract Today's emerging usage of ISM band introduces concept of the Cognitive Radio (CR), they are intelligent transceivers that accommodates dynamic frequency allocation (DSA). Based on challenges in cognitive radio networks there are some approaches

A Two Channel Sensing Method in Cognitive Radio Networks Using Opportunistic Spectrum Access
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Abstract: Spectrum sensing and its efficient utilization are the main intriguing problems in Cognitive radio (CR) networks. The problem heightens if the network has multiple secondary users (SUs) in it. To nullify the existing issue of spectrum sensing, a new spectrum sensing

Side Lobe Suppression of OFDM Based Cognitive Radio by Using Genetic Algorithm
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Abstract�The spectrum allocation policies of the Federal Communications Commission (FCC)[1] only allow spectrum access to primary users, it has been proven by various spectrum measurement campaigns that, the current spectrum usage across time and

Cognitive Radio Spectrum Sensing: A Survey
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Abstract:Cognitive Radio (CR) is a promising technology to improve the spectrum utilization efficiency. Due to the increasing demand for wireless communication CR allows better use of the radio spectrum. CR is intelligent network that adapt to the changes in

A Study of Spectrum Sensing Method for Cognitive Radio under Low SNR
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Abstract: Spectrum sensing is a key component of cognitive radio technology. Cognitive users employ smart dynamic access schemes to detect and use spectrum holes without causing any harmful interference to primary users, due to which the frequency band

ANALYSIS OF LINK EFFICIENCY AND HANDOFF WITH MOBILITY MANAGEMENT INCOGNITIVE RADIO
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Abstract:Cognitive radio cellular network has been proposed as a solution to spectrum scarcity and spectrum inefficiency problems. However, they face challenges based on the opportunistic communication of secondary user, making it more difficult to support

SSP-Based Routing under Blind Information for Cognitive Radio Ad Hoc Networks
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Abstract:The concept of opportunistic dynamic spectrum access or the cognitive radio emerged as a result of tremendous increase in the demand for wireless connectivity. In wireless networks, control information is usually carried through a common channel. But in

Radio Resource Management in Cloud Computing Based Cognitive Radio
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Abstract: Cognitive Radio Network has emerged as a solution to the growing spectrum scarcity and inefficiency problems. However, Cognitive Radio Networks face performance and security bottlenecks due to lack of memory and vast computational capabilities. This

Defense Against Selfish PUEA in Cognitive Radio Networks Based on Hash Message Authentication Code
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Abstract Cognitive radio network (CRN) is a very astute technology developed to solve the spectrum shortage problem in wireless communication by utilizing the unused bands, where a secondary user (SU) utilizes the free spectrum of the primary user (PU) in an

An Overview of Spectrum Management of Cognitive Radio Networks
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Abstract-Nowadays, wireless communication has become the most popular communication. As the need of wireless communication applications is increasing, the demand for wireless spectrum is also increasing commensurately. So, the most important challenge is to share

MANIPULATING MULTICHANNEL RANGE FOR SUPPORTIVE MULTICAST IN COGNITIVE RADIOMESH NETWORKS
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Abstract:As the network components are increasingly becomes reliable, and is playing an ever greater role in determining network reliability. Specifically, explore when and how standby backup forwarding options can be activated while waiting for an update from the

Analysis of Attacks in Cognitive Radio Networks
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ABSTRACT: Cognitive Radio (CR) is a promising technology for next-generation wireless networks in order to efficiently utilize the limited spectrum resources and satisfy the rapidly increasing demand for wireless applications and services. It solves the spectrum scarcity

COGNITIVE RADIO WITH MULTIMODE INTERLEAVER-A REVIEW
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ABSTRACT Cognitive Radio (CR) is a concept for improving the utilization of the radio spectrum. It is a software controlled radio that senses the unused frequency spectrum at any time from the wide but congested wireless radio spectrum. This promises the efficient use

Comparison of PAPR reduction techniques in OFDM based Cognitive Radio
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Abstract Cognitive Radio technology is a promising solution to utilize the licensed frequency band in opportunistically. OFDM is a multicarrier modulation scheme. It provides the number of benefits when it is implemented at the physical layer of the cognitive radio such as ease

Joint Beamforming, Power and Channel Allocation in Multi-User and Multi-Channel Underlay MIMO Cognitive Radio Networks
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ABSTRACT In this paper, a joint beamforming, power and channel allocation in a multi-user and multi-channel underlay MIMO cognitive radio networks is considered. The primary users (PU's) spectrum is reused by the secondary user transmitters (SUTXs) to maximize the

Adaptive Power Allocation in OFDM Based Cognitive Radio Network using Algorithm for the MIMO Relay Path Channels
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Abstract: Greedy loading methodology needs varied iterations and designed for power allocation drawbacks. By exploitation of gradient descent approach in adaptational gradient primarily based power allocation methodology to assign the ability to subcarriers in

NTELLIGENT WIRELESS COMMUNICATION SYSTEM USING COGNITIVE RADIO
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ABSTRACT The increasing demand for wireless communication introduces efficient spectrum utilization challenge. To address this challenge, cognitive radio (CR) is emerged as the key technology; which enables opportunistic access to the spectrum. CR is a form

Improved Performance of Ber for Efficient Timing Division in Cognitive Radio Systems
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Abstract-The Synchronization in a cognitive radio system is a major concern today. As it will allow continuous signal on the basis of timing jitter. There are many orthogonal frequency division multiplexing (OFDM) based signal detection scheme, but the most important

A Survey: Render of PUE Attack in Cognitive Radio Compressed by Software DefinedRadio
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Threats of Spectrum sensing for wireless Cognitive Radio Network. On the basis of the Wireless Signal a PU is detected in a given band, all secondary Users should avoid accessing that band. However, when a Secondary user is detected other Secondary users

Performance of Eigenvalue Based Spectrum Sensing In Full-Duplex Cognitive RadioNetworks
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Spectrum sensing is a key component in any cog-nitive radio network. Recently full-duplex communication, ie, the ability to transmit and receive at the same time at the same frequency, has become feasible. Residual self interference is inevitable even after

Markov Model-based Energy Efficiency Spectrum Sensing in Cognitive Radio Sensor Networks
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Abstract: Cognitive Radio Sensor Network (CRSN), incorporating cognitive radio capability in wireless sensor networks, is a new paradigm of the next-generation sensor network. Sensor nodes are usually battery powered and hence have strict energy constraints. As a

Exploiting The Digital Dividend In TV Spectrum For Cognitive Radio Networks
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Abstract:Radio spectrum is a necessary barrier for flourishing of economic activities through provision of wireless services. The radio spectrum suitable for the propagation of wireless signals is a limited resource and hence requires optimal allocation as collectively

Achieving a Better Energy-Efficient Cognitive Radio Network
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Abstract: Energy efficiency in cognitive radio networks has received lots of research attention lately due to the impact low energy efficiency has on the design, implementation and performance of the network. In this research, cognitive radio network as regards to energy

Dynamic Spectrum Allocation for Heterogeneous Cognitive Radio Network
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Abstract:One important issue associated with spectrum man-agement in heterogeneous cognitive radio network is: how to appropriately allocate the spectrum to the secondary senderdestination (SD) pair for sensing and utilization. In this work, the authors investigate

Ambient Energy Sources, Applications and Ambient Energy Harvesting in Cognitive Radio
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Abstract: Reinforced concrete (RC) structure using externally bonded fiber reinforced polymer (FRP) components has become a very worldwide practice, extensively accepted by recent design codes. In particular, the flexural strength of a reinforced concrete beam can

Protecting Cognitive Radio Networks Against Poisson Distributed Eavesdroppers
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Abstract:In this paper, we study secure transmission designs for underlay cognitive radio networks in the present of randomly distributed eavesdroppers. We consider the scenario where a secondary transmitter sends confidential messages to a secondary receiver

SMART FILTENNA FOR COGNITIVE RADIO APPLICATION
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Filtenna which can able to sense entire Ultra Wide Band (UWB) spectrum for the availability of spectrum holes and thereby makes use of that spectrum for secondary user transmission. This proposed antenna is capable to sense and make data transmission in the freely

Comparative Evaluation of Spectrum Sensing Techniques for Cognitive Radio
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Radio transmission involves the use of part of the electromagnetic spectrum, which is a natural scarce resource. Although use of spectrum is regulated by government agencies

Intelligent Spectrum Sensing Techniques for Cognitive Radio Network
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Abstract: The growing demand of wireless applications has put a lot of constraints on the usage of available radio spectrum which is limited and precious resource. Cognitive radio is a promising technology which provides a novel way to improve utilization efficiency of

Sidelobe Suppression in OFDM Based Cognitive Radio Using Modified AST
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Abstract: In this paper genetic algorithm (GA) is applied on a method known as adaptive symbol transition (AST) used for suppressing the sidelobes in orthogonal frequency division multiplexing (OFDM) based cognitive radio (CR) technology. CR is an effective technique

Mitigating primary emulation attacks in multi-channel cognitive radio networks: A surveillance game
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Abstract:Primary User Emulation Attack (PUEA), in which attackers emulate primary user signals causing restriction of secondary access on the attacked channels, is a serious security problem in Cognitive Radio Networks (CRNs). An user performing a PUEA for

Optimization of Energy Detection Based Spectrum sensing in cognitive radio over k- � Fading Channels
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Abstract:Spectrum sensing, the problem of detecting the presence of licensed user in the channel is considered in this paper. Energy detection is best suited for the spectrum sensing when prior knowledge about the primary users is unavailable. Existing works report

FULL-DUPLEX COGNITIVE RADIO: ENHANCING SPECTRUM USAGE MODEL
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ABSTRACT With the rapid growth of demand for ever-increasing data rate, spectrum resources have become more and more scarce. As a fore-seen promising technique to increase the efficiency of the spectrum utilization, cognitive radio (CR) technique has the

Adaptive Spectrum Sensing for Very Low SNR in Cognitive Radio Networks
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Abstract: Cognitive Radio (CR) is a self-adaptive wireless technology that can detect available channels automatically in a wireless spectrum and configured dynamically. Spectrum sensing in CR is the fundamental activity to detect unused spectrum holes in an

Dynamic Spectrum Allocation in Cognitive Radio: Throughput Calculations
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Abstract:In this paper, we use queuing theory (egalitarian process sharing) to derive throughput expressions for dynamic spectrum allocation in cognitive radio systems. In particular, we consider different priority groups, for example, secondary users who can

Cooperative Spectrum Sensing for Cognitive Radio Vehicular Ad Hoc Networks: An Overview and Open Research Issues
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Abstract:Cognitive Radio Vehicular Ad hoc Networks (CR-VANETs) utilize CR technology to increase frequency bandwidth for vehicular communications. Cooperative Spectrum Sensing (CSS) exploits spatial and temporal diversity for fast and accurate detection of

Genetic Algorithm Approach for cognitive radio technology
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Abstract: In this paper we have gone through a very brief idea on Genetic Algorithm, which is a very new approach for problems related to Optimization. There are many techniques used to optimize a function but in case of optimizing Multimodal Functions most of these

An Implementation of Optimum Routing Strategy in Cognitive Radio Network
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Abstract�The growth in demand of wireless devices and multimedia applications has led to increase in spectrum usage and put a of limitations on the use of available radio spectrum that is limited and precious resource. Many survey of spectrum utilization shows that entire

Energy Detection Based Estimation of Primary Channel Occupancy Rate in Cognitive Radio
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(CR) systems can detect transmission opportunities by means of periodic spectrum sensing. The design and configuration of spectrum sensing is commonly aimed at optimising the instantaneous detection of such opportunities. Besides the detection of transmission

Ergodic Capacity of Multiuser Scheduling in Cognitive Radio Networks: Analysis and Comparison
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Abstract This paper analyzes the ergodic capacity of secondary point-tomultipoint communications under the outage constraint of multiple primary user receivers (PU-Rxs) and the secondary user (SU) maximum transmit power limit. We first derive analytical

SCIENCES RESEARCH TECHNOLOGY PERFORMANCE ANALYSIS OF SPECTRUM SENSING USING UNDER SAMPLING FOR COGNITIVE RADIO
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ABSTRACT The deficiency of the spectrum range is major issue in communication technology to augment the new standard of communication. The reuse of spectrum is become a way to effectively use the spectrum. To perform this, spectrum sensing is

Power Allocation Algorithm of OFDM-Based Cognitive Radio Network using Particle Swarm Optimization
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Abstract: The deficiency of wireless spectrum resources is one of the main factors constraining the further development of wireless communication. To improve resource efficiency, Cognitive Radio (CR) one of the best solution to improve. Cognitive Radio is

Quality Enhancement and Reduction in Hand-off Latency in Cognitive Radio Network
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Abstract: Cognitive Radio (CR) has immerged as the solution for spectrum inefficiency and spectrum scarcity. In many research papers so far, various frameworks and infrastructures have been proposed for deployment of CR network. In this paper, we have come up with

STUDY OF COOPERATIVE SENSING APPROACH IN COGNITIVE RADIO NETWORKS
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ABSTRACT Radio Spectrum is regarded as a fundamental unit in Wireless communication network, as it plays an important role of transmission medium; and with the advent of technologies dealing with radio spectrum; cognitive radio has emerged as a effective

Spectrum Sensing for Full-Duplex Cognitive Radio Systems
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Abstract. Full-Duplex (FD) transceiver has been proposed to be used in Cognitive Radio (CR) in order to enhance the Secondary User (SU) Data-Rate. In FD CR systems, in order to diagnose the Primary User activity, SU can perform the Spectrum Sensing while operating

SELECTION OF SPECTRUM SENSING METHOD TO ENHANCE QOS IN COGNITIVE RADIONETWORKS
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ABSTRACT The massively increasing number of wireless communication devices has led to considerable growths in radio traffic density, resulting in a predictable shortage of the available spectrum. To address this potential shortage, the Cognitive Radio (CR)

Joint Beam forming, Channel Allocation in MIMO based Cognitive Radio Networks
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Abstract: In this paper, we consider a joint beamforming, channel allocation in Multiple-Input Multiple-Output cognitive radio network (CRN). In this system, primary users'(PUs') spectrum can be reused by the secondary user transmitters (SUTXs) to maximize the spectrum

Historical Spectrum Sensing Data Mining for Cognitive Radio Enabled Vehicular Ad-Hoc Networks
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Abstract:In vehicular ad-hoc network (VANET), the reliability of communication is associated with driving safety. However, research shows that the safety-message transmission in VANET may be congested under some urgent communication cases.

Literature Review of Resource Allocation Methods in Cognitive Radio Networks
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Abstract: Cognitive radio network (CRN) is growing worldwide which leads such networks are suffering from the challenges of efficient spectrum/resource allocation as well as lack of spectrum. Efficient spectrum allocation technique becomes new research problem in use

Cross-Layer Source Distribution for Video Streaming over OFDMA Cognitive RadioNetworks
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Abstract: In this paper, a cross-layer source Distribution algorithm is proposed in the context of orthogonal frequency division multiple access (OFDMA)-based cognitive radio (CR) video application systems. User video quality and channel awareness are incorporated in the

ChiMaS: A Spectrum Sensing-based Channels Classification System for Cognitive RadioNetworks
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Abstract:Cognitive radio devices are able to sense the spectrum of frequencies and share access to vacant channels. These devices usually have a candidate channels list that must be sensed to find a vacant channel. In this paper, we propose a novel system called

An Adaptive Channel Assignment Approach for Streaming of Scalable Video over Cognitive Radio Networks
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Abstract:In this study, a framework is proposed to stream different scalable videos from a base station to multiple secondary users over cognitive radio networks. The objective of this work is to ensure that the secondary users will enjoy continuous video playback with

Detection of PUE Attacks in Cognitive Radio
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Abstract-Cognitive radio and technology is a low cost communication system. The main reason of choosing the cognitive system is that it prevents the interfering of licensed and authorised users, by choosing the available frequencies and waveforms automatically.

Cognitive Radio Technology A Smarter Approach
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Abstract:The insatiable desire of man to exploit the radio spectrum is increasing with the introduction newer communication devices. This leads to more spectrum occupation by users which use the spectrum in a limited manner leading to so called spectrum scarcity.

DGS BASED FREQUENCY RECONFIGURABLE MICROSTRIP PATCH ANTENNA FORCOGNITIVE RADIO AND WI-MAX APPLICATIONS
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In this paper, Defective ground based frequency reconfigurable micro strip patch antenna for cognitive radio and Wi-max applications is proposed. The different antenna parameters like Return loss (S11), VSWR, Radiation pattern, Gain and Directivity are improved when compared

Applications of Cognitive Radio Networks: Recent Advances and Future Directions
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In cognitive radio sensor networks, the routing methods including multiple relays have been extensively studied to achieve higher throughput and lower end-to-end delay. As one of innovative approaches, the opportunistic routing scheme was proposed. In this paper, the

AN OVERVIEW TO COGNITIVE RADIO SPECTRUM SHARING
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ABSTRACT: Today we deal with growing demands of wireless broadband access, which further goes on increasing. Problem of under utilization of licensed spectrum motivates us to find out different techniques to improve the efficiency of spectrum usages. Here in this

Cooperative Communication with Uplink Power Control and Cognitive Radio using TV Whitespace Network in Cellular Networks
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Abstract:In a multi user environment, a number of users share the same radio resources. A consequence of the limited availability of radio channels in the network is that the same channel has to be assigned to many users. Thus a signal intended for a certain user will

A Framework for Packet Delay Analysis of Point-to-Multipoint Underlay Cognitive RadioNetworks
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Abstract This paper presents a queueing analytical framework for the performance evaluation of the secondary user (SU) packet transmission with service differentiation in a point-to-multipoint underlay cognitive radio network. The transmit power of the SU

On the Performance of Cooperative Spectrum Sensing in Random Cognitive Radio Networks
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Abstract:This paper investigates the performance of coop-erative spectrum sensing in cognitive radio networks using the stochastic geometry tools. In order to cope with the diversity of received signal-to-noise ratios (SNRs) at secondary users, a practical and

ENERGY EFFICIENT COOPERATIVE SPECTRUM SENSING IN COGNITIVE RADIO
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ABSTRACT Sensing in cognitive radio (CR) protects the primary user (PU) from bad interference. Therefore, it is assumed to be a requirement. However, sensing has two main challenges; first the CR is required to sense the PU under very low signal to noise ratios

Trust-based Cooperative Spectrum Sensing Against SSDF Attacks in Distributed Cognitive Radio Networks
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Abstract:We propose and analyze a trust-based data fusion scheme against spectrum sensing data falsification attacks in a distributed cognitive radio network. Our trust-based data fusion scheme is based on mechanism design theory to motivate users to report

Approximation Algorithms for Wireless Opportunistic Spectrum Scheduling in Cognitive Radio Networks
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Abstract Given a set of communication links in cognitive radio networks, assume that the underlying channel state information along each link is unknown; however, we can estimate it by exploiting the feedbacks and evolutions of channel states. Assume time is divided

A COMPARISON OF XML AND OWL BASED APPROACHES TO REPRESENTING COGNITIVE RADIO FUNCTIONS
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ABSTRACT A wireless network of software-defined radios can be considered as a distributed computing system, since the radios that are on the network possess the capabilities of performing various sensing and computation tasks requested by the

Spectrum Allocation in Cognitive Radio Networks Using Genetic Algorithm
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Abstract: In this model, we present a method in which the Dynamic Spectrum gets optimized for its usage in Cognitive Radio Networks. Firstly, based on the Interference Temperature model, we determine the interference constraints and there is a check on the transmission

MAXIMALLY IMPROPER INTERFERENCE IN UNDERLAY COGNITIVE RADIO NETWORKS
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ABSTRACT It is well-known that the use of improper signaling schemes can be beneficial in interference-limited networks. Here we consider an underlay cognitive radio scenario, where a multi-antenna primary user is protected by an interference temperature constraint that With the explosive proliferation of wireless services and applications, such as vehicular ad hoc networks, smart grid, and Internet of Things (IoT), the demand for radio spectrum has been skyrocketing. Since the amount of usable radio spectrum is finite, frequency bands

On the Eigenvalue based Detection for Multi-antenna Cognitive Radio System
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Abstract:Eigenvalue based spectrum sensing can make detection by catching correlation features in space and time domains, which can not only reduce the effect of noise uncertainty, but also achieve high detection probability. Hence, the eigenvalue based



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