ENGINEERING RESEARCH PAPERS

cognitive radio research papers 2015 IEEE PAPER




Entropy based Spectrum Sensing in Cognitive Radio Networks
free download

Abstract: Spectrum sensing is one of the important tasks of Cognitive Radio Networks (CRN). Though many spectrum sensing techniques are available, sensitivity to noise uncertainty is the basic limitation for these techniques. In this paper, an improved entropy

Cyclostationary Detection Based Spectrum Sensing for Cognitive Radio Networks
free download

Abstract:In this paper, cyclostationary detection Based spectrum sensing is considered for cognitive radio networks. We first summarize the existing first-order and second-order cyclostationary detection algorithms, which can be considered as a brief tutorial on

A Credibility-based Defense SSDF Attacks Scheme for the Expulsion of Malicious Users inCognitive Radio
free download

Abstract Cognitive radio (CR) can improve the utilization of the spectrum by making use of licensed spectrum in an opportunistic manner. However, the security aspects of cognitive radio networks have garnered little attention. In this paper, we identify a threat to cognitive

Analysis of Different Spectrum Sensing Techniques in Cognitive Radio Network
free download

Abstract-Cognitive radio permits unlicensed users to access licensed frequency bands through dynamic spectrum access so as to reduce spectrum deficiency. This requires intelligent spectrum sensing techniques like co-operative sensing which creates use of

Cognitive Radio Technology: System Evolution
free download

Abstract:Cognitive Radio is a novel method of radio communication which enables more efficient use of the frequency spectrum. This efficiency is achieved by dynamically allocating frequency bands within the spectrum to different users. Within the field of Cognitive Radio,

An Energy-aware Cooperative Spectrum Sensing Scheme in Cognitive Radio Sensor Networks
free download

Abstract Cognitive radio technology can make secondary users (SUs) access unused licensed spectrum in opportunistic manner without interference to primary users (PUs). Spectrum sensing is a key technology for cognitive radio (CR). However, there are few

Implementation of Optimization Algorithm by Sub-Carriers Assignment and Power Allocation for LTE and Cognitive Radio Network using OFDM Signal
free download

ABSTRACT The optimization algorithm had been analysed for the improvement of the spectrum efficiency and check trade-off between capacity and fairness for cognitive networks in a low algorithm complexity. Different low complexity algorithms for proportional

MadeCR: Correlation-based Malware Detection for Cognitive Radio
free download

Abstract:Cognitive Radio (CR) is an intelligent radio technology to boost spectrum utilization and is likely to be widely spread in the near future. However, its flexible software- oriented design may be exploited by an adversary to control CR devices to launch large

Robustness to Multiple Primary Users and Balanced Channel Assignment in Cognitive RadioNetworks
free download

Abstract:Cognitive radio networks (CRNs) are a promising solution to the problem of inefficient spectrum usage. This technology allows primary users (PUs) to share the spectrum with secondary users (SUs), where SUs communicate through unassigned

A Directional Cognitive-Radio-Aware MAC Protocol for Cognitive Radio Sensor Networks.
free download

Abstract Recently, cognitive radio (CR) technology is broadly applied even to sensor networks. Cognitive radio sensor networks (CRSNs) have been studied and, apparently, sensor nodes equipped with directional antennas achieve higher energy efficiency. This

Implementing Game Theory in Cognitive Radio Network for Channel Allocation: An Overview
free download

Abstract Cognitive radio network has been introduced for better utilization of spectrum in wireless network. With change in environment cognitive radios have to change their operating parameters to achieve certain goals. Traditional approach for resource

Energy Efficient Design for External Cooperative Sensing in Cognitive Radio
free download

ABSTRACT In this paper, the energy efficiency of cooperative sensing in cognitive radio networks is investigated. In cooperative sensing, more energy is consumed in sensing the channel and reporting the results to the fusion detector. To address this issue a very

Error Control Code Based Resistance against Primary User Emulation Attack in Cognitive Radio
free download

ABSTRACT Cognitive Radio Networks (CRN), one of the emerging technologies in the wireless communication domain, is primarily used for spectrum sensing and proper allocation of the unused licensed bands to the secondary users without causing any

Detection of Primary User in Cognitive Radio Using Bayesian Approach
free download

Abstract-Using cognitive radios (CRs), the secondary users (SUs) is allowed to use the spectrum originally allocated to primary users (PUs) as long as the primary users are not using it temporarily. This operation is called opportunistic spectrum access (OSA). To

Enhancement of Spectrum Efficacy using Cognitive Radio Networks.
free download

Abstract Spectrum is the most valuable and scarce resource for every wireless application. Due to the scarcity of the spectrum other alternatives are also being searched. Cognitive Radio (CR) technology is one such alternative which has gained popularity in the recent (CRNs) let unlicensed or secondary users (SUs) access licensed spectra, improving wireless resource utiliza- tion and addressing the problem of spectrum shortage. SUs are allowed spectrum access only when they don't cause unacceptable levels of interference to licensed or

Efficient Resource Allocation Algorithm with Rate Requirement Consideration in Multicarrier-Based Cognitive Radio Networks
free download

Abstract:In this paper, we present an efficient downlink resource allocation algorithm with rate requirement consideration in multicarrier-based cognitive radio (CR) networks. The algorithm is divided into two steps aiming to maximize the downlink capacity of the

Analysis of Outage Performance in Cognitive Radio Networks
free download

CRNs with mutual interference between SUs and PUs under the underlay approach. We derive the outage probability expression of CRNs, and it is shown that the outage probability of CRNs with considering the interference to SU from PU is higher than that of CRNs

Novel Approach to reduce BER in Cognitive Radio
free download

Abstract:In this research paper a technique is introduced to improve Bit Error Rate in cognitive radio. In this paper the FHSS of 32-bit and DSSS of 16-bit is implemented in the network. After implementation of proposed technique results are produced which shown

A Self-Trust Detection Scheme against Cooperative Sensing Misbehavior in Cognitive RadioNetworks
free download

Abstract Cooperative sensing is one of the available technologies to increase access opportunity for unused spectrum and avoid interference to the primary users in cognitive radio networks. However, some secondary users (SUs), defined as attackers, can cause

Maximization of Throughput in Cognitive Radio using non-persistent CSMA combined with Reinforcement Learning
free download

Abstract: The Cognitive Radio project aims to develop radios that can sense the existing spectrum and identify and use free frequency bands. Primary users using time division multiple access (TDMA) are licensed users who are assigned with certain channels, and

End-to-End Delay Analysis in Cognitive Radio Ad Hoc Networks with Different Traffic Models
free download

Delay and throughput are important metrics for network performance. We analyze the end-to- end delay of cognitive radio ad hoc networks for two traffic models: backlogged and geometric, respectively. By modelling the primary users as a Poisson point process and

Two Stage Sensing Model for Optimizing Communication over Cognitive Radio
free download

Abstract:Cognitive radio provides the effective communication model for wireless network. This communication is shared by primary and secondary users. The primary users are the registered licensed users whereas the secondary users are free users. As the load over

Performance Evaluation of Computationally Efficient Energy Detection Based Spectrum Sensing for Cognitive Radio Networks
free download

The rapid growth of bandwidth demanding wireless technologies has led to the problem of spectrum scarcity. However, studies show that licensed spectrum is underutilized. Cognitive radio technology promises a solution to the problem by allowing unlicensed users, access

Design Approach for Cross Layer Attacks Defence in Cognitive Radio
free download

Abstract-A latest communication technology named CRN is a network in which an un- licensed user can use a freed channel in a spectrum band of licensed user without causing interference to the incumbent transmission. Cognitive Radio networks are vulnerable to

Effects of malicious users on the energy efficiency of cognitive radio networks
free download

Abstract:Multiple Cognitive Radio Users (CRUs) perform local spectrum sensing independently and makes a binary decision about the spectrum occupancy. The binary decision is forwarded to a Fusion Center (FC) for fusion which leads to more accurate

System Level Simulation and Radio Resource Management for Distributed Antenna Systems with Cognitive Radio and Multi-Cell Cooperation
free download

Abstract The performance of wireless networks will experience a considerable improvement by the use of novel technologies such as distributed antenna systems (DASs), multi-cell cooperation (MCC), and cognitive radio (CR). These solutions have shown considerable

Distributed Synchronization Protocol For Secondary Overlay Access In Cognitive RadioNetworks
free download

Abstract:A secondary distributed synchronization protocol in the Overlay based Hybrid Automatic Repeat request cognitive radio has been proposed. A detailed description for our protocol is given and simulation runs have been carried out. Our results show how

Interference Alignment and Fairness Algorithms for MIMO Cognitive Radio Systems
free download

Interference alignment (IA) is an effective technique to eliminate the interference among wireless nodes. In a multiinput multioutput (MIMO) cognitive radio system, multiple secondary users can coexist with the primary user without generating any interference by The aim of this book is to present, in a tutorial perspective, the visions and trends for future wireless networks and technologies based, inspired, and learned from Cognitive Radio (CR) investigations that have been carried out within the framework of the COST Action IC0902

Issues and Challenges in Spectrum management in Cognitive Radio Networks
free download

Abstract:Cognitive radio is a revolutionary technology that allows efficient, adaptable and intelligent use of spectrum without causing interference to the current licensed users. For cognitive radio adaptability, optimal usability and the power to evolve are the major factors Abstract This chapter examines the enabling role of cognitive radio technologies for unmanned aircraft systems to access more spectrum needed for flight operations. Analysis of stakeholders sets the requirements for cognitive radios. With these requirements, the

Application of Game Theory to Cognitive Radio Networks for Power Allocation: An Overview
free download

Abstract Due to continuously increasing demand of wireless communication technology, the problem of spectrum shortage arises. Cognitive radio technology enables efficient utilization of the existing wireless spectrum resources. CRN utilizes spectrum band by allowing

Decentralized Multiuser Cooperative Spectrum Sensing in Cognitive Radio System
free download

Abstract: Cooperative spectrum sensing (CSS) was proposed as one solution to overcome uncertainty noises in primary signal detection. It increases capability of primary signal detection and accuracy. This paper investigates the performance of decentralized CSS

Heterogeneous Cognitive Radio Sensor Networks for Smart Grid: Markov Analysis and Applications
free download

Cognitive radio sensor networks (CRSN) have the potential to vastly improve spectrum utilization among heterogeneous applications for smart grid. To date, there has been little queueing theoretic modeling conducted of such systems that provide a quantitative

An Energy Approximation Model Based on Restricted Isometry Property in Compressive Spectrum Sensing for Cognitive Radio
free download



Energy-Efficient, Learning-Inspired Channel Decision and Access Technique for Cognitive Radio-based Wireless Sensor Networks.
free download

Abstract Cognitive radio-based wireless sensor network is the next-generation sensor network paradigm. Important to this emerging sensor network is the need to reduce energy consumption, paving way for 'green'communication among sensor nodes. Therefore, in

Performance Analysis of Distributed Coordinated Spectrum Sensing in Cognitive RadioNetworks
free download

Abstract: This paper present the work on Cognitive Radio Networks (CRN) to improve the spectrum sensing performance. By using distributed coordinated spectrum sensing all the Secondary Users (SUs) are grouped into optimum number of clusters, selection of each

Optimal Hard Decision Fusion Rule for Centralized and Decentralized Cooperative Spectrum Sensing in Cognitive Radio Networks
free download

Abstract:Cognitive radio (CR) is the key technology for unlicensed secondary users (SUs) to exploit the unused spectrum of primary users (PUs) via opportunistic spectrum access. In CR networks, SUs can be coordinated to perform cooperative spectrum sensing (CSS) to

Resource Allocation in OFDMA-Based Cognitive Radio Networks via Cooperation with Primary Users
free download

Abstract:This paper considers an OFDMA-based cooperative cognitive radio network where the secondary users (SUs) act as the relay of the primary users (PUs) while guaranteeing the quality of service (QoS) of the PUs. In return, the SUs access the

ENERGY EFFICIENT ROUTING IN COGNITIVE RADIO NETWORKS: CHALLENGES AND EXISTING SOLUTIONS.
free download

Abstract Dynamic Spectrum Allocation using Cognitive Radio (CR) is a promising solution to the spectrum availability problem in wireless networks. Cognitive Radio, however, opens up certain new issues, mainly at the physical, medium access control and routing layer levels.

Proposed Optimization Technique for Maximization of Throughput under Using Different Multicarrier Systems in Cognitive Radio Networks
free download

ABSTRACT Beside the hard ware implementation problems in Cognitive Radio Networks (CRNs), some communication criteria's are considering to generate CRN with improvement, reliability and motivation communication system. One of these criteria's is how to maximize

Medium Access Probability of Cognitive Radio Network at 1900 MHz and 2100 MHz
free download

ABSTRACT Conventionally fading analysis of wireless LAN or MAN means small scale fading ie wide fluctuation of received signal with small variation of time and distance. In analysis of fading channel we consider the received signal in power, voltage or SNR as a

Analysis of Spectrum Sensing By Using Energy Detection Technique in Cognitive Radio
free download

Abstract: In wireless technologies the importance of spectrum is rapidly increases hence traffic of spectrum is also increases day by day. However, it seems that the current technologies do not utilize the licensed spectrum bands efficiently (6). So, energy

Cognitive Radio. Future of Wireless Communication
free download

This Paper describes the shortage of Radio Spectrum that the world is facing today. The solution to this problem is cognitive radio. Cognitive radio and its briefs are explained here. Increase in demand of something is good for mankind as it shows their economic

Performance Evaluation of Cognitive Radio Network Based on 2-D Markov Chain
free download

Abstract:The objective of cognitive radio network is to enhance the wireless network spectrum utilization. In such a network, two types of users are enlisted, namely primary user (PU) and secondary user (SU). The PU can access any channel in case of its availability,

Sensor Clustering and Sensing Technology for Optimal Throughput of Sensor-AidedCognitive Radio Networks Supporting Multiple Licensed Channels
free download

In cognitive radio networks, secondary users may not sense licensed channels efficiently due to problems of fading channel, shadowing, unfamiliar environment, and so forth. To cope with the limitation, a pervasive sensor network can cooperate with cognitive radio

Design of TV White Space Spectrum Sensing Receiver for Cognitive Radio
free download

Abstract In this paper, we present a TV white space spectrum sensing receiver for cognitive radio. It is implemented with super-heterodyne architecture including tunable bandpass filter to improve selectivity and linearity. Low noise amplifier module is designed to operate in

Social Cognitive Radio Networks
free download

Wireless spectrum is a scarce resource, and historically it has been divided into chunks and allocated to different government and commercial entities with longterm and exclusive licenses. This approach protects license users from harmful interferences from

Cognitive Radio Application for Smart Grid
free download

Abstract:The communication infrastructure between energy generation, transmission, distribution and utilization will require multi-way communications, interoperability between the advanced and existing system, and end-to-end reliable and secure communications

Analysis of Attacks in Cognitive Radio Networks
free download

Abstract: As the wireless communication greatly depends on spectrum utilization, the increase in demand for new wireless services and their application leads to the spectrum scarcity. To efficiently access the unavailable spectrum cognitive radio is used. The

Study of Different Performance Parameters of Prototype Filter for Filter Bank MulticarrierCognitive Radio
free download

Abstract Cognitive Radio has proven as an optimum technique for getting improved spectrum utilization by sharing the radio spectrum with licensed primary users opportunistically. The cognitive radio is a new paradigm to overcome the persisting

About Cognitive Radio Receiver under an Indoor Environment
free download

ABSTRACT This small note makes an analysis of the current situation of the Cognitive Radio (CR) performance under an indoor environment. As well as, measurements of the electromagnetic environment in the 800-900 MHz UHF Band are carried out in a specific

An Adjustable Channel Bonding Strategy in Centralized Cognitive Radio Networks and its Performance Optimization
free download

Abstract: One form of spectrum enhancement technologies for cognitive radio networks is a channel bonding strategy, with which a network user can utilize multiple idle channels as one bonding channel. In this paper, we propose an adjustable channel bonding strategy

Spectrum Sensing and Optimization Based on New Energy Detection Methods in Cognitive Radio
free download

Abstract: Development of new wireless applications and services, spectrum resources are facing unprecedented demand. Currently, spectrum allotment is done by providing each new service with its own fixed frequency band. With each passing day most of these

Parameter Optimization Based on Evolutionary Algorithms for Green Cognitive Radio
free download

Abstract: In this paper, we study parameter adjustments that maximize the energy efficiency of green cognitive radio. Because the problem of parameter adjustments for green cognitive radio can be looked at as a complex discrete optimization problem, evolutionary

Quantum Bacterial Foraging Optimization for Cognitive Radio Spectrum Allocation
free download

Abstract This paper proposes a novel swarm intelligence optimization method which integrates bacterial foraging optimization (BFO) with quantum computing, called quantum bacterial foraging optimization (QBFO) algorithm. In QBFO, a multi-qubit which can

Single Link Performance of UWB Systems Based on Cognitive Radio in the AWGN UWB Channel
free download

Abstract:The single link performance of UWB systems in the AWGN UWB channel is investigated. Based on Cognitive Radio (CR) spectrum allocation and the restriction of Federal Communications Commission (FCC) emission mask, the second derivative

Joint Beamforming and Power Allocation Cognitive Radio Networks under Imperfect CSI
free download

Abstract Traditional beamforming and power control algo-rithms in cognitive radio (CR) are based on the assumption of perfect channel state information (CSI) however; this may lead to performance degradation in realistic systems. In this paper, the problem of joint

Transmitter Detection Techniques for Spectrum Sensing in Cognitive Radio System
free download

Abstract The revolution in radio technology causes a lack of radio spectrum. Radio spectrum is a limited is a limited source which is becoming denser day by day. Some of the radio frequency bands bear heavy traffic and other bands are rarely used. Cognitive Cognitive radio (CR) is a revolutionary wireless communication paradigm which releases the spectrum from shackles of authorized licenses and enables secondary users (SUs) to opportunistically access the underutilized licensed spectrum. Due to the great economic

Cognitive Radio With Software Defined Radio and Mimo for Future Generation Wireless Communication
free download

Abstract Spectrum is a natural resource of communication path and it is main entity of wireless communication. At present maintain the spectrum secrecy is a big problem because of exponential growth of users and devices of wireless communication. Spectrum have

Performance Evaluation of Spectrum Sensing Techniques based on Eigenvalue in Cognitive Radio Networks
free download

Abstract:Spectrum management is required to control the transmission of radio waves to avoid interference and mixing among wireless users. Intelligent Transceiver ie Cognitive Radio is the key enabling technology to support spectrum management dynamically. To

Performance Analysis of Cognitive Radio Networks Adopting Packet Discarding or Buffering Policy
free download

Abstract In a cognitive radio network (CRN), a preempted secondary user (SU) is placed in a call level queue to wait for accessing another free channel. If the availability of channels is transparent to SUs, packets will be generated during their waiting time and the

Cognitive Radio: Issues and Challenges
free download

Abstract With the rapid growth in wireless communication, the available spectrum is being congested day by day. For the efficient utilization of the limited spectra, Cognitive Radio System (CRS) plays an important role that has ability to dynamically adapt its parameters

Energy efficiency in cognitive radio network: Study of cooperative sensing using different channel sensing methods
free download

ABSTRACT When cognitive radio (CR) operates, it starts by sensing spectrum and looking for idle bandwidth. There are several methods for CR to make a decision on either the channel is occupied or idle, for example, energy detection scheme, cyclostationary

Frequency Hopping CR MAC Protocol in Cognitive Radio Ad Hoc Network
free download

Abstract To insure the fairness for the Cognitive Radio (CR) nodes with various available channels, a frequency hopping CR MAC protocol based dynamic (named DCR-MAC) is proposed. In the case of uneven distribution of frequency spectrum in cognitive Ad Hoc

CENTRALIZED COOPERATIVE AND NON COOPERATIVE SPECTRUM SENSING USING ENERGY DETECTIONIN COGNITIVE RADIO
free download

In this paper we focus on spectrum sensing in cognitive radio to sense the presence of primary user and effectively use the available radio bandwidth. Cognitive users are allowed to share the licensed spectrum allotted to the primary user, when kept unutilized by it.

CRANs (Cognitive Radio Ad Hoc Network) a Survey
free download

A Survey of CRANs (Cognitive Radio Ad Hoc Network) has taken in this report. Cognitive Radio has been proposed in 1999s by Joseph Mitola III and Gerald Q. Maguire, since 1999s there are numerous Cognitive Radio MAC protocols have been proposed while only one

Enrichment of Adaptive Threshold in Cognitive Radio
free download

ABSTRACT Cognitive radio is the technology that helps overcome the problem of scarcity in a spectrum. It has its application in empowering a secondary user to gain entry into the spectrum. This admittance is because of detection of unoccupied part of the spectrum. It This book is focused on anti-jamming transmissions in cognitive radio networks (CRNs) and covers several recent research hot topics in this field. First, we present the transmissions based on uncoordinated spread spectrum to address smart jammers in CRNs. We also

Enhancing the Enabling Technologies: A TVWS and Cognitive Radio Scenario
free download

Abstract As the concern of effective utilization comes with any other resource, spectrum and its efficient usage has been an issue for quite some time. With the tremendous growth in number of wireless consumers, the problem of effective spectrum utilization (or spectrum

On the Capacity of Cognitive Radio Sensor Networks: From Physical Layer to Network Layer
free download

Abstract Cognitive Radio has stirred great interest recently, with its tremendous potential to further exploit the scarce spectrum resource. Among the diverse research topics, the fundamental capacity issue deserves a thorough study since it serves as a principle for

A Novel Slot Antenna with Reconfigurable Meander-Slot DGS for Cognitive RadioApplications
free download

Abstract- A new planar reconfigurable wideband slot antenna is proposed for cognitive radio (CR) applications in this paper. The wideband function is obtained by inserting a meander e-shaped slot in the rectangular radiation patch. The reconfigurable

A Novel Framework for Achievable Secrecy Throughput of Distributed Cognitive RadioWireless Networks
free download

Abstract:The achievable secrecy throughput of the distributed cognitive radio wireless networks (DCRWNs) is investigated in this paper. The related works on the secrecy performance mainly focus on the average value depending on nodes spatial distribution.

MAC Protocol for Quality-Aware Real-Time Voice Delivery in Cognitive Radio-Enabled WSNs
free download

We propose a quality-aware media access control (MAC) protocol for real-time voice delivery in cognitive radio-(CR-) enabled wireless sensor networks (WSNs). The temporal structure of the system model is addressed by using periodic timeslots in order to make

Performance Analysis of Cognitive Radio Networks with a Two-part Queue
free download

Abstract: In a cognitive radio network (CRN), a preempted secondary user (SU) is placed in a call level queue to wait for accessing another free channel. If the availability of channels is transparent to SUs, packets will be generated during their waiting time and the

Handbook of Research on Software-Defined and Cognitive Radio Technologies for Dynamic Spectrum Management
free download

ABSTRACT Machine to Machine (M2M) communications have been recently introduced as a viable paradigm for allowing low cost and efficient communications among devices mainly in an autonomous manner. Even if M2M protocols need dedicated resources, a new

A Trust Game Model and Algorithm for Cooperative Spectrum Sensing in Cognitive RadioNetworks
free download

Abstract The existence of malicious secondary users will bring damage to the performance of cooperative spectrum sensing and spectrum access in cognitive radio networks, so effectively curbing malicious behavior of secondary users become the key to success for

Cooperative Adaptive Threshold Based Energy and Matched Filter Detector in Cognitive Radio Networks
free download

Abstract: CR (cognitive radio) is the key technology for unlicensed SUs (secondary users) to exploit the unused spectrum of PUs (primary users) via opportunistic spectrum access. In this paper, we propose a new spectrum sensing method using cooperative adaptive

Histogram Stacking Based Non-Quite Period Sensing for Throughput Maximization inCognitive Radio Network
free download

Abstract: Cognitive Radio (CR) improves the spectrum efficiency by utilizing the spectrum holes of licensed channels for secondary transmission. In the traditional spectrum sensing techniques, during the sensing period, CR users do not transmit. The spectrum efficiency,

GROUP FORMATION SCHEME OF CELLS FOR BETTER SPECTRUM EFFICIENCY IN COGNITIVE RADIO NETWORK
free download

ABSTRACT A network is an interconnection of different users where different users exchange information with each other using transmitters and receivers. When the information are need to be transmitted automatically then in such cases cognitive radio

A New Protocol for Cooperative Spectrum Sharing in Mobile Cognitive Radio Networks
free download

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). The key challenge in a CRN is

A Survey on Routing Protocols for Cognitive Radio Networks
free download

(CR) has emerged as one of the most promising technology to overcome the inefficient spectrum utilization problem. The basic intention behind CR is to opportunistically allow unlicensed users to utilize the vacant licensed spectrum without causing much

Non-Cooperative Cognitive Radio Optimization using Fuzzy Logic and Monte-Carlo Algorithms
free download

Abstract: Cognitive Radio threshold optimization has been an on-going research concern. With mature energy detector algorithms, the CR implemented in this work uses an energy detector as the primary sensing module for the primary user signal. In order to achieve this

Control Channel Allocation in Cognitive Radio Networks using Clustering
free download

Abstract:The static allocation schemes have led to the problem of spectrum under- utilization. In many bands, spectrum access is a more significant problem than physical scarcity of spectrum, in large part due to legacy command-and-control regulation that

Enriched the Spectrum Sensing Performance of Estimated SNR Based Detector in Cognitive Radio Networks
free download

Abstract Spectrum sensing is one of the vital functions, plays an important role in cognitive radio networks (CRN). This paper discuss to enrich the sensing performance of propose estimated signal to noise ratio (SNR) based detector. Estimated SNR detector consists two

Cognitive Radio-Trends, Scope and Challenges in Radio Network Technology
free download

Abstract: Cognitive radio is a revolutionary technology that aims for remarkable improvements in efficiency of spectrum usage. It will change the way the radio spectrum is regulated, but also requires new enabling techniques such as improved spectrum sensing

Optimal Subcarrier Power Allocation in OFDM Based Cognitive Radio Networks by Using Gradient Based Methods
free download

Abstract The Power allocation in Orthogonal Frequency Division Multiplexing (OFDM)-based cognitive radio networks is designed by gradient based method. The gradient based method in which the power allocated between subcarriers by considering the interference

Performance analysis of Spectrum Sensing under Rayleigh and Nakagami Fading Channel inCognitive Radio
free download

Abstract:Cognitive radio technology is one of the innovative design concept in radio whose objective is to increase spectrum utilization. Spectrum sensing is the most appropriate method performed by cognitive radio for the efficient utilization of RF spectrum without any

An OFDM throughput analysis for cognitive radio application in contiguous or noncontiguous TV white spaces
free download

Abstract: Radio frequency spectrum is a finite and scarce resource. Efficient use of the radio frequency spectrum is a fundamental research issue. Since a large portion of the assigned radio frequency spectrum is used only sporadically, the bands currently allocated to TV

Cognitive radio systems in the land mobile service
free download

This Report addresses cognitive radio systems (CRSs) in the land mobile service (LMS) above 30 MHz (excluding IMT). This Report presents the existing, emerging and potential applications employing CRS capabilities and the related enabling technologies, including

Generalized Detector as Spectrum Sensor in Cognitive Radio Networks
free download

Abstract. The implementation of the generalized detector (GD) in cognitive radio (CR) systems allows us to improve the spectrum sensing performance in comparison with employment of the conventional detectors. We analyze the spectrum sensing performance

Improved Group Key Agreement for Emergency Cognitive Radio Mobile Ad hoc Networks
free download

Abstract Cognitive radio based networks can resolve the spectrum scarcity issues present in the current emergency communication networks. Establishing quick and secure communication between rescue team members in the disaster field is a significant task

Spectrum Aware Mobility Management In Cognitive Radio-A Survey
free download

Abstract Cognitive radio (CR) enables the efficient utilization of the limited radio spectrum, network resources and an unlicensed user can communicate in licensed spectrum without interfering a licensed user. In CR expected to address several operational challenges

Simulation study of Markov chain models with an application in Cognitive Radio Networks
free download

Abstract: Spectrum management is a crucial task in wireless networks. The research in cognitive radio networks by applying Markov is highly significant suitable model for spectrum management. This research work is the simulation study of variants of basic Markov

ON A METHOD OF FORMATION OF SIGNALS WITH HIGH SPECTRAL EFFICIENCY FORCOGNITIVE RADIO COMMUNICATION SYSTEM.
free download

ABSTRACT The paper presents results of the studies aimed at development of new method for formation of signals for cognitive radio communication systems, which would allow to increase spectral efficiency of systems for data transmission as compared to the existing

NeSAM: Negotiation based approach for Spectrum Access and Mobility management incognitive radio networks
free download

Abstract Throughout the last decade, cognitive radio systems received a lot of consideration for spectrum optimization and create huge opportunities for interesting research in a wide range of applications. Spectrum access and sharing tasks are widely studied for static

On the Optimal Set of Channels to Sense in Cognitive Radio Networks
free download

Abstract We study a channel selection problem in cognitive radio with imperfect spectrum sensing. In this problem, a secondary (unlicensed) user must select a subset of M channels out of N channels to sense. The user then accesses up to K= M channels that were

Video Transmission in Tactical Cognitive Radio Networks Under Disruptive Attacks
free download

In this chapter, I examine the performance of a cognitive radio system in a hostile environment where an intelligent adversary tries to disrupt communications by minimizing the system throughput. I analyze two modes of attack, spoofing and jamming, under slow

Cognitive Radio System Cross-layer Routing Algorithm Research
free download

Abstract This paper combines the link reliability and the shortest time delay and a joint strategy for cognitive route, the policy routing process combined with spectrum allocation, adopt cross-layer approach, in the process of routing implementation spectrum availability

Distortion mitigation in cognitive radio receivers
free download

Abstract The exponential increase of wireless communication increasingly leads to spectrum congestion. Attempts are being made to increase RF spectrum utilization efficiency by introducing Cognitive Radio (CR) concept. A CR tries to intelligently solve the congestion

A Review on Spectrum Sensing Techniques in Cognitive Radio Network
free download

In recent years cognitive radio is the emerging area in wireless communication. Because of the growing demand on the wireless application has put the lot of constraints

MULTI-HOP DISTRIBUTED COORDINATION IN COGNITIVE RADIO NETWORKS
free download

ABSTRACT Control Channel Dilemma (CCD) is still an open problem for Cognitive Radio Network (CRN). In this article, we investigate and present a novel solution of Distributed Coordination in CRN to mitigate the necessity for a common control channel. This scheme

A Note On: Cognitive Radio and It Performance Tools
free download

A Cognitive Radio (CR) is an adaptive and intelligent radio and also network technology that can automatically detect available channels in a wireless spectrum. It can

OPPORTUNISTIC SPECTRUM UTILIZATION BY COGNITIVE RADIO NETWORKS: CHALLENGES AND SOLUTIONS
free download

ABSTRACT Cognitive Radio Network (CRN) is an emerging paradigm that makes use of Dynamic Spectrum Access (DSA) to communicate opportunistically, in the un-licensed Industrial, Scientific and Medical bands or frequency bands otherwise licensed to

EFFICIENT DETECTION OF SELFISH ATTACKS IN COGNITIVE RADIO NETWORKS USING COOPON ALGORITHM
free download

Abstract: Cognitive radio is a solution for the spectral crowding problem by introducing opportunistic usage of frequency bands that are not occupied by licensed primary users. Cognitive radios determine vacancy portions of licensed spectrum, and utilize such

Mitigating Intrusion and Vulnerabilities in Cognitive Radio Networks
free download

Abstract The deployment of Cognitive Radio Networks has been greatly hindered in spite of its potentials by the rate at which intrusions and vulnerabilities replicate within every domain of the network. Cognitive Radio Network is expected to drive the next generation wireless

Design of an Adaptive Energy Detector based on Bi-Level Thresholding in Cognitive Radio
free download

Abstract: Cognitive radio communication has emerged as an efficient mean of utilization of spectrum for wireless communication. In cognitive radio communication the energy detector logic for spectrum estimation is the most eminent part for estimation of used spectrum over

NOVEL SPECTRUM SENSING AND ALLOCATION USING COGNITIVE RADIO AD HOC NETWORKS
free download

ABSTRACT: A cognitive radio is a radio that can change its transmitter parameters based on interaction with the environment in which it operates. If the primary base station is busy or it is in congestion, the spectrum sensing and allocation will become difficult to perform. In

Spectrum Sensing Techniques for Cognitive Radio Applications
free download

Abstract Cognitive Radio (CR) has received tremendous research attention over the past decade, both in the academia and industry, as it is envisioned as a promising solution to the problem of spectrum scarcity. A CR is a device that senses the spectrum for occupancy by

Implementation of Trust Modeling Scheme for Artificial Intelligence in Cognitive RadioNetworks
free download

Abstract: A Basic problem facing the future in wireless systems is where to find suitable spectrum bands to fulfill the demand of future services. To overcome this problem and improve the spectrum utilization cognitive radio concept has been evolved. Wireless

Adaptive Step Size and Weighting Factor Based Power Allocation in Cognitive RadioNetworks
free download

Abstract: The gradient-based method is used for power allocation in ofdm-based cognitive radio networks. Their arise resource allocation problem. For mutual interference constraint is considered. We use gradient decent approach for power allocation to subcarrier in CR

A Novel Approach to Reduce the Spectral Ping-Pong Effect for the Mobility Management Framework in a Cognitive Radio Cellular Network.
free download

Abstract Cognitive radio devices use the unutilized spectrum ie the unutilized frequency resource from the underlying technology in that region. When a primary user appears in a channel, the cognitive radio (CR) devices switch to a different channel which leads to



FREE IEEE PAPERS