cognitive radio research papers 2013
RESEARCH PAPERS

cognitive radio research papers 2013




Exploiting Orthogonally Dual-Polarized Antennas in Cooperative Cognitive Radio Networking
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ABSTRACT This work is concerned with enhancement of spec-trum utilization by using polarization enabled two-phase cooperation between primary users (PUs) and secondary users (SUs) in cooperative cognitive radio networking (CCRN). The use of orthogonally 

A Formal Mathematical Model of Cognitive Radio
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ABSTRACT Cognitive Radio (CR) has caught a lot of attention lately due to its unprecedented capabilities, and its potential to enhance the user's radio experience. CR, as introduced by Mitola, adds a new dimension in the radio domain; that's the incorporation of the 

A New Fuzzy Logic Rule Based Power Management Technique for Cognitive Radio
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ABSTRACT The limited available spectrum and the ineffiffiffifficient use of spectrum necessitate a new communication paradigm to exploit the existing wireless spectrum opportunistically. Cognitive radio is a wireless communication system in which either a 

The Performance Evaluation of AODV-based and DSR-based Multi-radio Routing Protocols inCognitive Radio Ad Hoc Network
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ABSTRACT Due to the huge advancement of wireless technologies, the radio spectrum is one of the most heavily used and costly natural resources. Cognitive Radio (CR) is a promising technology to solve the problem of radio spectrum shortage and spectrum underutilization 

Power Minimization Through Relay Subset Selection Inunderlay Cognitive Radio Networks
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ABSTRACT In this paper, we consider a dual-hop Cognitive Radio Networkthat consists of a secondary sourcedestination pair assisted by cognitive relays in their communication. The whole network is operating in an underlay mode near a primary user. Underlay networks 

Effective Performance Evaluation of On-Demand Routing Protocol for Cognitive Radio Ad Hoc Network
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ABSTRACT To solve Spectrum decision and route selection problem which have vital role in cognitive radio ad hoc network (CRAHN), many researchers developed different methodology how efficiently select the proper route between source and destination. In 

Channel quality prediction based on bayesian inference in cognitive radio networks
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ABSTRACT The problem of channel quality prediction in cognitive radio networks is investigated in this paper. First, the spectrum sensing process is modeled as a Non- Stationary Hidden Markov Model (NSHMM), which captures the fact that the channel state 

Utility-based cooperative spectrum sensing scheduling in cognitive radio networks
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ABSTRACT In this paper, we consider the problem of cooperative spectrum sensing scheduling (C3S) in a cognitive radio network when there exist multiple primary channels. Deviated from the existing research our work focuses on a scenario in which each 

An Effective Dynamic Spectrum Access Method for Use in Cognitive Radio
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ABSTRACT Due to huge demand for radio spectrum in wireless communication networks, fixed spectrum access policy is a major problem in solving spectrum crisis. Dynamic spectrum access is a method which gives the solution by allocating the available limited 

Cooperative multi-hop relaying via network formation games in cognitive radio networks
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ABSTRACT The cooperation between the primary and the secondary users has attracted a lot of attention in cognitive radio networks. However, most existing research mainly focuses on the single-hop relay selection for a primary transmitter-receiver pair, which might not be 

On Optimal Communication Strategies for Cooperative Cognitive Radio Networking
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ABSTRACT This work is concerned with enhancement of spectrum-energy efficiency whereby a primary user (PU) engages secondary users (SUs) to relay its transmission in an energyaware cognitive radio network, ie, forming a cooperative cognitive radio network ( 

Advances in spectrum sensing and cross-layer design for cognitive radio networks
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ABSTRACT Spectrum sensing is the key task for cognitive radio (CR) networks with significant challenges that have attracted a flux of research and innovation in recent years. Various signal processing, learning and optimization techniques have been employed to tackle 

Game Theoretic Analysis of Orthogonal Modulation Based Cooperative Cognitive RadioNetworking
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ABSTRACT An orthogonal modulation enabled two-phase energy-efficient framework is presented for active cooperation between secondary users (SUs) and primary users (PUs) in a cognitive radio network. Since the PU has higher priority, and SUs compete for spectrum 

Cooperative relay selection in cognitive radio networks
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ABSTRACT The benefits of cognitive radio networks have been well recognized with the dramatic development of the wireless applications in recent years. While many existing works assume that the secondary transmissions are negative interference to the primary 

FMAC: A Fair MAC Protocol for Coexisting Cognitive Radio Networks
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ABSTRACT Cognitive radio is viewed as a disruptive technology innovation to improve spectrum efficiency. The deployment of coexisting cognitive radio networks, however, raises a great challenge to the medium access control (MAC) protocol design. While there have 

A Cooperative Spectrum Sensing Scheme Based on Trust and Fuzzy Logic for Cognitive Radio Sensor Networks
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ABSTRACT This paper proposes a cooperative spectrum sensing scheme based on trust and fuzzy logic for Cognitive Radio Sensor Networks (CRSN). The CRSN nodes use the TS fuzzy logic to make local decisions on the presence or absence of the primary user's (PU) 

Energy Detection Using Min-Max Technique in Uncertain Noise Environment in Cognitive Radio Network
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ABSTRACT This paper considers the detection of presence or absence of signals in low SNR medium with uncertainty in noise spectral density. In traditional energy detector, we have assumed that the channel and noise power should be constant during sensing period. 

ENERGY DETECTION BASED SPECTRUM SENSING FOR COGNITIVE RADIO
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ABSTRACT Cognitive Radio is an emerging technology which avoids the congestion in wireless communication by exploiting unused radio spectrum. The Spectrum sensing plays a fundamental requirement of CR which finds an unused free spectrum and detects the 

The Life Cycle of the Rendezvous Problem of Cognitive Radio Ad Hoc Networks: A Survey
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ABSTRACT In cognitive radio or dynamic spectrum access networks, a rendezvous represents meeting two or more users on a common channel, and negotiating to establish data communication. The rendezvous problem is one of the most challenging tasks in cognitive 

Sense in Order: Channel Selection for Sensing in Cognitive Radio Networks
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ABSTRACT This paper considers a pre-phase of spectrum sensing in cognitive radio networks (CRNs), which is about how to choose a channel for spectrum sensing. We take the time dimension, spectrum dimension, and spacial dimension into account and propose a 

Virtual Backbone Construction for Cognitive Radio Networks without Common Control Channel
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ABSTRACT The advantages of virtual backbones have been proven in wireless networks. In cognitive radio networks (CRNs), virtual backbones can also play a critical role in both routing and data transport. However, the virtual backbone construction for CRNs is more 

Performance Improved Graph Based Scheduling Algorithm for Infrastructure based Cognitive Radio Networks
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ABSTRACT This paper focuses on cognitive radio network (CRN), in which a group of nodes communicate over a shared wireless medium with a limited bandwidth. Here frequency channel for transmission of primary radio network (PRN) which is the legacy network will 

Reconfigurable Channel Selection Technique for Cognitive Radio Network with Heterogeneous Primary Bands
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ABSTRACT Recently FCC has mandated the usage of database to observe the spectral opportunity at a given place over time along with the usage of spectrum sensing. It is arduous to obtain the database for spectral opportunity for all places and since spectral 

Signal Uncertainty in Spectrum Sensing for Cognitive Radio
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ABSTRACT The inability to perfectly know the system noise properties to infinite precision, referred to as noise uncertainty, results in noise power calibration errors that have been proven to impose fundamental limitations on the detection performance of any spectrum 

Anomaly Spectrum Usage Detection in Multihop Cognitive Radio Networks: A Cross-Layer Approach
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ABSTRACT awareness of their environment and internal state, fulfills the need of dynamic spectrum access for higher spectrum utilization. However, at the same time, the use of cognitive radios further complicates the security problems in wireless networks and 

Genetic Algorithm-Based Approach to Spectrum Allocation and Power Control with Constraints in Cognitive Radio Networks
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ABSTRACT This study presents a genetic algorithm for spectrum allocation and power control, both with constraints, in cognitive radio networks. The models for spectrum allocation and power control with constraints are formulated in a partially distributed manner, then the 

Spectrum Sensing Time Optimization Algorithm for Spectrum Efficiency Maximization in the Low-power Cognitive Radio Ultra Wideband System
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ABSTRACT For energy detection in a cognitive radio (CR) system, the spectrum sensing time required to successfully detect a primary user (PU) is inversely proportional to the PU's signal strength. When the PU operates in low-SNR regime, the effective transmission time 

Minimum-latency broadcast scheduling for cognitive radio networks
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ABSTRACT Cognitive Radio Networks (CRNs) introduce a new communication paradigm which enable unlicensed users to opportunistically access spectrum bands assigned to licensed users. Interestingly, the broadcast problem, which is one of the most fundamental 

Communication Mechanisms for Cognitive Radio Networks
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ABSTRACT Comprehensive communication in cognitive radio networks is an important research topic within the scope of empowering cognitive radio functionality in beyond-4G mobile networks. Providing communication for secondary users without interference with 

Matched Filter Based Spectrum Sensing on Cognitive Radio for OFDM WLANs
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ABSTRACT For the unlicensed users to use the licensed spectrum, unused frequency bands called white spaces need to be detected. Cognitive radio does this task by dynamic spectrum access. This requires intelligent spectrum sensing techniques. In this paper such 

Power Allocation Scheme for Secondary User under Primary Full Duplex Relay System inCognitive Radio Network
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ABSTRACT A power allocation scheme for the secondary user when the primary user employs the full duplex relay (FDR) is proposed in cognitive radio system. When the FDR is deployed in primary system, the primary relay and receiver suffers the interference from the 

A Management Architecture for Multihop Cognitive Radio Communication
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ABSTRACT Cognitive radio technology is a key concept suggested to be part of the so-called 5th generation mobile networks. The basic idea is to allow unlicensed users access to licensed spectrum, under the condition that the interference perceived by the licensed 

WAVELET AND S-TRANSFORM BASED SPECTRUM SENSING IN COGNITIVE RADIO
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ABSTRACT Cognitive Radio is an intellectual radio having the ability of recognizing the vacant spectrum to transmit the data to avoid spectrum inefficiently usage problem. Here CR uses the spectrum policies technique, to spot the existence of user in particular frequency band. 

A Cross-layer Scheduling Algorithm Based on Cognitive Radio Network
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ABSTRACT Cognitive radio network users have different QoS requirements. In order to provide different QoS requirements to users as well as increase the capacities of the cognitive radio networks, this paper presents a first in-depth comparative study on different factors effect 

Efficient Discovery and Recovery of Common Control Channel in Cognitive Radio Wireless Ad-hoc Networks
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ABSTRACT The most important aspect of cognitive radio (CR) networks is to search, scan, and access the control channel to advertise the free channel list (FCL) amongst the participating CR nodes. Subsequent communication could not take place until there is an access to a 

Reconfigurable Microstrip Antennas for Cognitive Radio
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An increasing demand for radio spectrum has resulted from the emergence of feature-rich and high-data-rate wireless applications. The spectrum is scarce, and the current radio spectrum regulations make its use inefficient. This necessitates the development of new 

A Novel Parallel Joint Channel Allocation Algorithm on Cognitive Radio System?
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ABSTRACT Large amounts of channels will be allocated to the individual user if only one rule is used when calculating labels in existing parallel algorithm. Aiming at this condition, we propose a novel algorithm, named as parallel joint channel allocation algorithm on 

An Improved Fractal Box Dimension Extraction Method of Signals in Cognitive Radio under Low Signal-to-noise Ratio?
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ABSTRACT Fractal box dimension as a feature is widely used in many fields such as spectrum sensing in cognitive radio, image processing, modulation recognition of signals, parameter estimation of signals, and so on. In order to improve the estimation accuracy of it, an 

Digital Modulation Classification in Cognitive Radio Using Hybrid Particle Swarm Optimization Algorithm-support Vector Machines: PSO-SVM?
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ABSTRACT Automatic modulation classification (AMC) plays an important role in cognitive radio. This paper investigates the design of an accurate system for recognition of digital modulations. First higher-order cumulant is extracted as feature vector. The Cramer-Rao 

Sensing-throughput Tradeoff for Cognitive Radio Networks with Additional Primary Transmission Protection?
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ABSTRACT In cognitive radio networks, the accuracy of spectrum sensing is crucial for protection of primary users, which is proportional to its sensing time. For fixed-duration frame, the longer sensing time can lead to the lower throughput, thus under the constraint 

An Improved Algorithm for Blind Modulation Recognition of Signals in Cognitive Radio?
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ABSTRACT An improved algorithm for blind modulation recognition of signals in cognitive radio (CR) is proposed in this paper, which uses the number of sinusoid component as a feature to classify FSK, BPSK, MSK and QPSK modulation schemes. Firstly, the received signal is 

Research on the Buffer-mechanism-based Dynamic Spectrum Access in Cognitive Radio?
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ABSTRACT How to improve the performance for the secondary users in cognitive radio networks is a hot spot in current research. This paper proposes a Random-Dynamic Spectrum Access strategy with buffer mechanism to the services which are insensitive to 

Performance Analysis of Dynamic Spectrum Access and a New Admission Control Mechanism in Cognitive Radio Networks?
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ABSTRACT The problem of spectrum scarcity can be effectively solved with cognitive radio technology, which can lead to the full utilization of spectrum holes. Most previous researches of cognitive radio were focus on the analysis of access performance under some special 

A Cooperative Game-based Spectrum Allocation Approach in Cognitive Radio Networks?
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ABSTRACT With cognitive radio technology, secondary users may use the spectrum holes unused by primary users, and as a result the efficiency of spectrum utilization can be improved. In order to maximize the total profit of all secondary users, a Nash bargaining 

A Novel Spectrum Prediction Algorithm for Cognitive Radio System Based on Chaotic Neural Network?
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ABSTRACT In the cognitive radio system, the rationalization of spectrum allocation can be improved by the spectrum prediction algorithm. In recent years, the researches of spectrum prediction focus on how to predict channel status. In order to improve spectrum utilization 

Management and Sensing of Spectrum in Cognitive Radio
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ABSTRACT Under the contemporary spectrum usage regulations, radio frequency bands are allocated statically to licensed users in a large geographical area and over a long period of time. Recent investigations revealed that such static spectrum allocation has led to very 

Network and Economic Trade-Off Performance Regions of Cognitive Radio Systems with Power Control
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ABSTRACT Cognitive radio will enable terminals with access to licensed and unlicensed portions of the spectrum. This feature is expected to solve bandwidth scarcity problems in future wireless networks. However, different parts of the spectrum will be subject not only 

Cognitive Radio Spectrum Sensing Algorithms based on Eigenvalue and Covariance methods
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ABSTRACT Spectrum sensing method is the fundamental factor when we are working with cognitive radio systems. Main aim and fundamental problem of cognitive radio is to identify weather primary users in authorized or licensed spectrum is presented or not. Paper deals 

Wireless spectrum sharing and routing in cognitive radio network
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Today's wireless networks are characterized by a fixed spectrum assignment policy. The limited available spectrum and the inefficiency in the spectrum usage necessitate a new communication paradigm to exploit the existing wireless spectrum opportunistically. This 

An efficient Synchronization Aspects in Cognitive Radio Systems
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D Beohar, VB Baru ,theaccents.org ABSTRACT In this paper we discuss the synchronization problems in cognitive radio systems and suggested an efficient synchronization aspect. For this type of system the secondarytransmitter is well aware of the transmission timing of the primary transmitter 

Cognitive radio Multi-Channel routing based on an modified PCNN model
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Hong CAI, Dongming Zhou (Information College, Yunnan University, Kunming 650091) ABSTRACT The core idea of cognitive radio teconology is to realize the dynamic spectrum allocation and spectrum sharing through spectrum sensing and system learning. This 

COGNITIVE RADIO TECHNIQUES PROPOSED TO IMPLEMENT OPPORTUNISTIC SPECTRUM SHARING
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ABSTRACT The point in which wireless personal digital assistants (PDAs) and the related networks are sufficiently computationally intelligent about radio resources and related computer-to-computer communications to detect user communications needs as a 

Interference mitigation of microwave oven signalwifi system by using cognitive radiosystem
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VR Dahake ,irdindia.in ABSTRACT The MicroWave Oven (MWO) is a commonly available appliance that does not transmit data, but still radiates signals in the unlicensed 2.4 GHz Industrial, Scientific and Medical (ISM) band. The MWO thus acts as an unintentional interferer for IEEE 802.11 

Two Stage Spectrum Sensing for Cognitive Radio using Cyclostationarity detection and Energy Detection
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ABSTRACT Dynamic spectrum access (DSA) is a promising approach for the more effective use of existing spectrum. Of fundamental importance to DSA is the need for fast and reliable spectrum sensing over a wide bandwidth. Cognitive radio is an intelligent wireless 

Routing Strategies in Cognitive Radio Network: A Comprehensive Review
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MK Nasir, MT Rahman, MK Sohel, AKMK Islam ,rspublication.com ABSTRACT Routing is a very challenging task in a dynamic, large-scale wireless radio network. We have tried to review some of the routing strategies in cognitive radio network. We have studied the different routing technique in cognitive radio network and provide a 

Investigation of Multicarrier Modulation Schemes in Cognitive Radio Applications
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In parallel with the spreading of wireless communications, the users' need for higher data rates also increases. The amount of available frequency bands, however, is limited. Mitola attempts to resolve this contradiction in his paper published in 1999 , in which he 

BER Performance Maintenance in TURBO coded OFDM in Cognitive Radio
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N Shribala, BC Jinaga, V Nagar ,warse.org ABSTRACT Spectrum measurements show that wide ranges of the spectrum are rarely used most of the time while other bands are heavily used. However, those unused portions of the spectrum are licensed and thus cannot be utilized by users other than the license owners. 

Two-stage Detectors with Multiple Energy Detectors and Adaptive Double-Threshold inCognitive Radio Networks
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A BAGWARI, GS TOMAR ,downloads.hindawi.com ABSTRACT Cognitive Radio (CR) is a regulated technique for opportunistic access of idle resources. In CR, Spectrum sensing is one of the key functionalities. It is used to sense the unused spectrum in an opportunistic manner. In this paper, we have proposed two-stage 

An Approach to Spectrum Sensing in Cognitive Radio
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ABSTRACT Recent research shows that more than 70% of the available spectrum is not utilized efficiently. The bandwidth becomes expensive due to a shortage of frequencies. Therefore for efficient utilization of spectrum, we need to sniff the spectrum to determine whether it is 

SPECTRUM SENSING OF COGNITIVE RADIO
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ABSTRACT Spectrum sensing is an important step of multistep process of cognitive radio. Accuracy and Speed of estimation of operational parameters are the key indicators to select the appropriate spectrum sensing method to sense the spectrum hole. There are mainly 

Opportunistic Spectrum access for Dynamic Channel Selection and location estimation usingCognitive Radio
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AK Singh, P Kumar ,conference.aimt.edu.in ABSTRACT Cognitive radio is an enabling technology for direct spectrum access (DSA). It has capability to sense the spectrum for fallow licensed spectrum. Unlicensed users equipped with cognitive radios can use the band of incumbent users without interference. CR 

A Robust Power Allocation Algorithm in Cognitive Radio Networks?
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ABSTRACT Traditional distributed resources allocation algorithms are based on the hypothesis of perfect channel in cognitive radio networks. In fact, the parameters of the channel are variable, uncertain in some degree or even turbulent. Considering an ellipsoidal 

Construction of Cognitive Radio Based Emergency Communication System and Application Scenario Analysis
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H Wang, H Chen, S Zhu, L Song ABSTRACT Cognitive Radio (CR) can optimize system objects by dynamically assigning network resource and adjusting network operations in terms of network environments and conditions. So CR technology is very suitable for building emergency communication 

A Novel Spectrum Detection Algorithm in Cognitive Radio Networks?
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Y Lia, H Huanga, F Yea, Z Gaob ABSTRACT In view of the deficiencies of the traditional spectrum detection algorithms, a novel signal detection algorithm-spectrum detection based on two-dimensional features in cognitive radio networks is proposed. It puts forward a new instantaneous characteristics 

Cognitive Radio Decision Engine Based on Binary Chaotic Particle Swarm Optimization?
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Y Yu, X Tan, Y Xie, J Chen ABSTRACT A novel Cognitive Radio (CR) decision engine based on Binary Chaotic Particle Swarm Optimization (BCPSO) is presented to enable robust and spectrally-efficient transmission in this paper. The BCPSO algorithm is used to adjust transmitter parameters 

A SURVEY OF WIDEBAND LOW NOISE AMPLIFIERS DESIGN TECHNIQUES FOR COGNITIVE RADIO
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Amplifier (LNA) design for Cognitive Radios (CR). Design challenges and requirements of CR are discussed and recent advances in topologies and design techniques are presented, compared and summarized. The classical trade-offs of linearity, gain, input impedance 

Throughput Analysis of Spectrum in Cognitive Radio Ad Hoc Network
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ABSTRACT Cognitive Radio Ad Hoc Network (CRAHN) is a self-organized temporary network in which unlicensed users can access the spectrum of Primary Users in Primary Network during ideal time period of Primary Users. For this environment spectrum sensing 

Cyclostationary Feature Detection in Cognitive Radio for Ultra-Wideband Communication Using Cooperative Spectrum Sensing
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ABSTRACT Almost 80 to 90 percent of the radio spectrum is left unutilized at any period of time, while at the same time some other regions of spectrum experience overcrowding. A cognitive radio is a smart radio that can identify the idle frequencies (also termed as 

Signal Classification in Heterogeneous OFDM-based Cognitive Radio Systems
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ABSTRACT In this paper, we propose to study the spectrum awareness also called classification of various signals enabling the OFDM-based cognitive radio systems (CRS). In order to do so, some key properties relevant to the detection of the OFDM-based third- 

Performance of Polarized Sensing in Real-World Cognitive Radio Scenarios
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ABSTRACT The sensing performance of a cognitive radio system using a tri-polarized antenna at the secondary terminal is investigated in a real-world scenario. The analysis is based on an outdoor-to-indoor measurement campaign, where the secondary network is deployed 

A Simple Greedy Algorithm for Cognitive Radio Networks
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ABSTRACT The dearth in spectrum usage has become more vigorous since the demand for wireless applications has increased. Cognitive radio networks provide the opportunity to fully utilize the spectrum and decrease the demand for more spectrum for wireless 

Channel Allocation and Power Control Algorithm of Joint Resource Evaluation in Cognitive Radio Networks?
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W Feng, P Li, T Huang, C Zhou ABSTRACT For the open spectrum sharing and centralized cognitive network, a channel allocation and power control algorithm of joint resource evaluation based on non- cooperative game is proposed. The utility function considers both the users' receiving 

GA optimized SVD based signal detector for Cognitive radio Networks
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Genetic Algorithm (GA) optimized Singular Value Decomposition (SVD) method to detect the presence of wireless signal. We simulated the algorithm using common digital signal in wireless communication namely rectangular pulse, raised cosine and root-raised cosine 

BER Analysis of FSK Transceiver for Cognitive Radio Applications
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N Nagarathna, PG Biradar, H Budhiraja, SK Rao ABSTRACT In modern wireless communication, the radio spectrum is the most vital resource for a mobile operator. Most of the prime spectrums (licensed bands) are already allocated for license users for exclusive use. Few, unlicensed bands are left open for unlicensed users. 

Performance Analysis of Energy Efficient Power allocation for Secure OFDMA basedCognitive Radio Networks
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ABSTRACT In this paper, we are analyzing the performance of energy efficient power allocation for secure orthogonal frequency division multiple access (OFDMA) based cognitive radio networks (CRN? s). The power allocation schemes are optimized for 

Compressive Spectrum Sensing in Centralized Vehicular Cognitive Radio Networks
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JQ Duan, S Li, G Ning ABSTRACT Cognitive radio enabled vehicular networks (CR-VNETs) is a new communication paradigm that enables moving vehicles to identify spectrum opportunities along busy streets and freeways. This detected spectrum may possibly lie in licensed frequency bands, and 

Implementation and Analysis of Cognitive Radio System using MATLAB
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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. If scanning of a radio spectrum including revenue rich urban areas, shows that some frequency bands in 

Spectrum Occupancy Survey In HULL-UK For Cognitive Radio Applications: MeasurementAnalysis
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M Mehdawi, N Riley, K Paulson, A Fanan, M Ammar ABSTRACT Efficient use of the radio spectrum is a necessity for future wireless systems. Cognitive Radio (CR) systems promise large increases in spectral efficiency. An important design constraint for systems is understanding of the current use of frequency bands 

ADAPTIVE EIGENVALUE-BASED SPECTRUM SENSING FOR MULTI-ANTENNA COGNITIVE RADIO SYSTEMS
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ABSTRACT In this paper adaptive Eigenvalue-Based Spectrum Sensing (EBSS) techniques are proposed for multi-antenna cognitive receivers. In cases where fading channels are involved, and hence real-time processing is required, the adaptive techniques offer lower 

FMAC for Coexisting Ad Hoc Cognitive Radio Networks
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ABSTRACT Media access control plays a critical role in cognitive radio networks (CRNs). In our previous work, we have proposed a fairnessoriented media access control (FMAC) protocol to achieve fair and efficient coexistence of infrastructure-based CRNs. In this paper, we 

Wireless Regional Area Network (IEEE Standard 802.22) and WiMAX and Coverage Planning of a Wireless Regional Area Network Using Cognitive Radio 
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S Rahman, MN Hossain, MN Sayeed, ML Palash ABSTRACT The first worldwide application of cognitive radio (CR) networks in unlicensed television broadcast bands is IEEE 802.22 wireless regional area network (WRAN). This paper introduces the implementation of IEEE 802.22 Wireless Regional Area Network ( 

Interference Modeling and Analysis in Cognitive Radio Networks
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ABSTRACT Cognitive radio networks (CRNs) have received considerable attention and viewed as a promising paradigm for future wireless networking. Its major difference from the traditional wireless networks is that secondary users are allowed to access the channel if 

Cognitive Radio Enabled Telemedicine System
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AZ Shaikh, L Tamil ,downloads.hindawi.com ABSTRACT Appropriate pre-hospital-diagnostic, consultative and therapeutic facilities are important to improve deteriorating health conditions of patients especially those in transit such as an accident victim or a patient who had chest pain and being transported to a 

On Prioritized Spectrum Access in Cognitive Radio Networks with Imperfect Sensing
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ABSTRACT Cognitive Radio networks allow the unlicensed users to share the available spectrum opportunities. However, this demands for solving the problem of contention among multiple unlicensed user packets for transmission. In our paper, we consider the 

Cognitive Radio Systems: Realization and Technical Aspects
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ABSTRACT The rising number of communication technology has meet the need for very high data link speeds and provides very enhancing network throughput but this enhancement in speed has led to the increasing demands for frequency spectrum which has led to its 

Outage Performance Enhancement of Cognitive Radio UnderNakagami Fading
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BL Priya, G Thavaseelan ,academia.edu ABSTRACT The cognitive network allows the unlicensed user to access the licensed spectrum to enhance spectrum utilization. In this paper we make an attempt to enhance the outage performance of the cognitive user by incorporating multiple antenna and maximal ratio 

Cooperative Learning and Coordination for Cognitive Radio Networks
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ABSTRACT The raison d'etre for cognitive radio is that the radio spectrum is a scarce resource. Cognitive radio stretches this resource by enabling secondary users to operate in portions of the spectrum that are reserved for primary users but not currently used by the primary 

Spectrum Sensing Techniques and Issues in Cognitive Radio
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ABSTRACT In present day communication wireless communication has become the most popular communication. Because of this growing demand on wireless applications has put a lot of constraints on the available radio spectrum which is limited and precious. In fixed 

FULLY DISTRIBUTED SIGNAL DETECTION: APPLICATION TO COGNITIVE RADIO
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ABSTRACT Cooperative detection without fusion center has many applications such as spectrum sensing in cognitive radio or intrusion detection in ad hoc network. In this paper, we propose a new asynchronous fully-distributed cooperative algorithm which does not 

System Design Considerations for an Analog Frontend Receiver in Cognitive RadioApplications
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Radio technology and applications, focusing in the Standard IEEE 802.22 as well as in an extension of the frequency band application to the range of 54 MHz to 4 GHz. A direct conversion strategy is proposed and the receiver scenery is taken into account in order to 

A Layered Approach to Cognitive Radio Network Security: A Survey
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ABSTRACT Cognitive radios have been identified as a solution to the crowded spectrum issue. With the realization of cognitive radio networks came the recognition that both new and old security threats are relevant. The cognitive radio network is still vulnerable to 

SNE-ISMTV: VESNA wireless sensor node expansion for cognitive radio experiments
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T olc ,sensorlab.ijs.si ABSTRACT This demonstration shows how VESNA wireless sensor nodes can be used for cognitive radio experiments involving wireless sensor networks. SNE-ISMTV is a radio frontend that has been developed for this purpose. Spectrum sensing capability in the TV 

Theoretical Specification of a Spectrum Sensing Receiver for Cognitive Radio
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Spectrum Sensing Receiver used for Cognitive Radios. Its system level design is intended to comply with IEEE 802.22, IEEE 802.16 (Wimax) and LTE standards altogether. The operation frequency band is very wide, from 50MHz to 3.8 GHz. Calculated specifications 

An Improved Centralized Cognitive Radio Network Spectrum Allocation Algorithm based on the Allocation Sequence
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J Zhao ,downloads.hindawi.com The demand of the w ireless communications service is increasing in recent years, and the demand of the w ireless communication rate is increasing, too. How ever, the static spectrum allocation mechanism results in lots of free spectrum resources in space, and the 

Analytical Interference Model in CSMA-based Cognitive Radio Networks
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ABSTRACT In a typical cognitive radio network (CRN), secondary users can only access the channel when they do not harmfully interfere with the primary users. Therefore, an accurate estimation or prediction of interference from secondary users to primary users is essential. 

Throughput Optimal Multi-slot Sensing Procedure for a Cognitive Radio
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ABSTRACT We consider a cognitive radio system with M primary channels where users' data transmissions follow a slotted structure. We consider the scenario where the primary free statistics are correlated across channels as well as across time slots. In each slot, the 

Performance Analysis and Comparative Study of Cognitive Radio Spectrum Sensing Schemes
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ABSTRACT In cognitive radio, spectrum sensing is an emergent technology to find available and unused spectrum for increasing spectrum utilization and to overcome spectrum scarcity problem without harmful interference to licensed users. Cooperative spectrum sensing is 

Throughput Maximization Based on Optimal Access Probabilities in Cognitive Radio System
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M Elalem, L Zhao ,ee.ryerson.ca ABSTRACT Well-established fact shows that the fixed spectrum allocation policy conveys to the low spectrum utilization. The cognitive radio technique promises to improve the low efficiency. This paper proposes an optimized access strategy combining overlay scheme 

AN EFFICIENT COMMUNICATION AND SECURITY FOR COGNITIVE RADIO NETWORKS
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ABSTRACT A cognitive radio (CR) is a transceiver which automatically detects available channels in wireless spectrum and accordingly changes its transmission or reception parameters. In this paper, it proposes an algorithm for the energy-efficient and spectrum- 

Energy-Efficient Resource Allocation in Cognitive Radio Systems
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ABSTRACT In this paper, we investigate the energy consumption issue of Cognitive Radio (CR) systems. We aim to maximize the energy efficiency of the considered CR system with practical constraints, such as the power budget of the CR system, the interference 

Opportunistic Cognitive MAC (OCMAC) Protocol for Cognitive Radio Network
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S Gupta, A Kumar ,kietijce.org ABSTRACT Cognitive radio is being intensively researched as the enabling technology for license-exempt access to the so-called White Spaces (WS), large portions of spectrum in the UHF/VHF bands which become available on a geographical basis. We are proposing an 

Strategic Learning of Cross-layer Design for Channel Access and Transmission Rate Adaptation in Energy-constrained Cognitive Radio Networks?
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H He, J Wang, S Li ABSTRACT In this paper, we investigate the cross-layer strategic design of joint channel access and transmission rate adaptation in Cognitive Radio (CR) networks. Our target is minimizing the cost function which jointly considers the energy consumption in physical layer and the 

Adaptive Rate and Power Transmission for OFDM-based Cognitive Radio Systems
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ABSTRACT This paper studies the joint rate and power allocation problem for OFDM-based cognitive radio systems where secondary users (SUs) can opportunistically access the spectrum of primary users (PUs). We propose a novel algorithm that jointly maximizes the 

Enhanced Cognitive Radio Resource Management for LTE Systems
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ABSTRACT The explosive growth in mobile Internet and related services has increased the need for more bandwidth in cellular networks. The Long-Term Evolution (LTE) technology is an attractive solution for operators and subscribers to meet such need since it provides 

ANALYSIS OF PROTOCOLS FOR SPECTRUM SENSING IN COGNITIVE RADIO NETWORKS
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ABSTRACT Cognitive Radio allows opportunistic spectrum access (OSA) of licensed frequency bands by unlicensed users so as to reduce spectrum scarcity led by the increasing market demands. Spectrum sensing is an essential mechanism for a cognitive 

CORASMA Program on Cognitive Radio for Tactical Networks: High Fidelity Simulator and First Results on Dynamic Frequency Allocation
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L ROSE, R MASSIN, L VIJAYANDRAN, M DEBBAH ,flexible-radio.com ABSTRACT This paper reports some preliminary results of the cognitive radio for dynamic spectrum management(CORASMA) program that is dedicated to the evaluation of cognitive solutions for tactical wireless networks. It presents two main aspects of the program: the 

A practical approach of DoS/Jamming attack of Cognitive Radio Network
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ABSTRACT In the wireless communication, DoS attack is general attack. DoS (Denial of Service) attack is an attempt in which an attacker makes a network resource unavailable to the licensed user. In this paper we focus on the DoS attack of CRN (Cognitive Radio 

Distributed Decision Making in Cognitive Radio Networks Through Argumentation
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ABSTRACT We have developed a multi-agent negotiation system to distribute decision making in cognitive radio networks through argumentation. The challenge in wireless network negotiation is to efficiently exchange information to facilitate a deal without


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