RESEARCH PAPERS

COGNITIVE RADIO SPECTRUM SENSING AND SHARING




Cooperative spectrum sensing and spectrum sharing in cognitive radio: A review
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ABSTRACT Cognitive radio is a transforming and revolutionary technology that represents a paradigm shift in the design of wireless systems, as it allows agile and efficient utilization of the radio spectrum by offering the ability of radio sensing, self-adaptation, and dynamic 

Spectrum Sensing and Sharing for Cognitive Radio and Advanced Spectrum Management
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ABSTRACT In recent years, cognitive radios have been introduced as a new paradigm for enabling much higher spectrum utilization, providing more personal and reliable radio services, reducing harmful interference, and facilitating the interworking or convergence of 

Joint rate allocation, routing and spectrum sharing for multi-hop Cognitive Radio Networks with imperfect spectrum sensing
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ABSTRACT In this paper we study the joint rate allocation, routing and spectrum sharing policy for multi-hop Cognitive Radio Networks (CRNs). We formulate this cross layer optimization problem as a sequential decision process which aims to minimize the average total power 

 Sensing Architecture and Use Case Study: Distributed Sensing over Rayleigh Fading ChannelsRobust Spectrum Sensing Algorithms for Cognitive Radio Application
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PAPER-Spectrum Sensing A Side lobe Suppression Technique by  Modulator Employing Self Current Controlled Mixer for Cognitive Radio Shintaro SHINJO  Wireless Communication Technologies Efficient Frequency Sharing of Baseband and Subcarrier Coding 

Spectrum sensing and sharing in cognitive radio networks
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ABSTRACT The scarcity of bandwidth has always been the burden of high-speed wireless communication whose demand has been tremendously increasing over the years. Spectrum utilization and efficiency can be improved by making a secondary or unlicensed user to 

Spectrum Sharing and Sensing for Future Broadband Networks: The Cognitive Radio Technology
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A Complete Spectrum Sensing and Sharing Model for Cognitive Radio Ad Hoc Wireless Networks Using Markov Chain State Machine
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ABSTRACT an unlimited number of secondary users. It includes the sharing aspect of Cognitive Radio. Power-law distribution of node degree in scale-free networks is important for considering the traffic distribution and resource management thus we consider the effect 

Spectrum Sensing and Sharing for Cognitive Radio
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The de?nitions of CR are still being developed by industry and academia. At one extreme, a Full CR is assumed to be a fully re-con?gurable radio device that can cognitively adapt itself to both users' needs and its local environment. For example, a mobile handset may 

 Cognitive Radio Systems Based on Prediction Considering Cross-Layer OptimizationPotential Game Approach for Spectrum Sharing in Distributed Cognitive Radio 
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LETTER A Censor-Based Cooperative Spectrum Sensing Scheme Using Fuzzy Logic for Cognitive Radio Sensor Networks Thuc  pp.3501-3504 LETTER Analysis of Primary Signal Detection Period in Cognitive Wireless Communications Chang-Woo PYO 

Capacity and power allocation for spectrum sharing in cognitive radio systems under unknown channel state information and imperfect spectrum sensing
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Cognitive radio is a technology with tremendous potential for more efficient utilisation of the radio spectrum. Based on the available network side information to the secondary user, three transmission models are proposed in the literature: the 'underlay'method, the ' 

COGNITIVE RADIO SPECTRUM MANAGEMENT–SENSING AND SHARING
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Due to the significant growth of the wireless users number, and of the wireless multimedia applications (which require an increasingly larger bandwidth), the radio spectrum has become overloaded. The solution proposed by Joseph Mitola III, in order to provide 

Performance of Cooperative Spectrum Sharing and Dynamic Sensing Strategies for EfficientSpectrum Utilization in Cognitive Radio
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PK Srivastava, TR Sontakke ,International Journal of Engineering ,doaj.org ABSTRACT Due to crowd in the spectrum, interference protection is guaranteed through policy spectrum licensing. Cognitive radio and mesh network can facilitate spectrum sharing that improves spectral efficiency, provided spectrum policies are in place that supports these 

A survey of spectrum sensing algorithms for cognitive radio applications
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 This new dimension also creates new opportunities for spectral estimation where not only the frequency spectrum but also the angle of arrivals (AoAs  Hence, cognitive radio should be able to capture and analyze a relatively larger band for identifying spectrum opportunities. 

Implementation issues in spectrum sensing for cognitive radios
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 Section V presents the results from a cooperative sensing scheme, achievable gains and implementation issues. Finally, conclusions are presented in Section VI. II. SPECTRUM SENSING A Cognitive Radio is a radio that is able to sense the spectral environment over a 

NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
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 Although these projects have shown significant potential for increasing spectral efficiency, the reconfigurable system implementation for  a standalone cognitive sensing unit is developed to emulate the spectrum sensing capabilities of the cognitive radio. 4. Spectrum sensing. 

A survey on spectrum management in cognitive radio networks
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This feature can be detected by analyzing a spectral correlation function [7]. The main advantage of feature detection is its robustness to uncertainty in noise power.  Figure 3. Spectrum management framework for cognitive radio networks.  Link layer delay Spectrum sharing 

A Survey of Spectrum Sensing Algorithms for Cognitive Radio Applications.
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 This new dimension also creates new opportunities for spectral estimation where not only the frequency spectrum but also the angle of arrivals (AoAs  Hence, cognitive radio should be able to capture and analyze a relatively larger band for identifying spectrum op- portunities. 

A cognitive radio approach for usage of virtual unlicensed spectrum
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 Spectrum sensing is best addressed as a cross-layer design problem since sensitivity can be improved by enhancing radio RF front-end sensitivity, exploiting  Cognitive Radios are capable of sensing their spectral environment and locating free spectrum resources. 

Robust distributed spectrum sensing in cognitive radio networks
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 This method of sharing is often called Dynamic Spectrum Access (DSA).  The Cognitive Radio (CR) [4], [7] is seen as the enabling technology for DSA.  To avoid interfering with incumbents, a CR needs to carry out accurate spectrum sensing. 

Optimal linear cooperation for spectrum sensing in cognitive radio networks
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OPTIMAL LINEAR COOPERATION FOR SPECTRUM SENSING IN COGNITIVE RADIO NETWORKS 29 limited. The scheme based on voting rules [12] is one of the sim- plest suboptimal solutions, which counts the number of sensor nodes that vote for the presence 

Toward secure distributed spectrum sensing in cognitive radio networks
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NeXt Generation/Dynamic Spectrum Access/Cognitive  5] R. Chen and J.-M. Park, Ensuring Trustworthy Spec- trum Sensing in Cognitive  His current research interests are radio resource management and networking for cognitive radio wireless networks, opti 

Cooperative communications for cognitive radio networks
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By employing a wavelet transform of the power spectral density (PSD) of the observed signal Cooperative Communications for Cognitive Radio Networks  In [38], a dual-stage spectrum sensing technique is proposed for wide-band CR systems, in which a 

Sensing-based spectrum sharing in cognitive radio networks
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ABSTRACT In this paper, a new spectrum-sharing model called sensing-based spectrum sharing is proposed for cognitive radio networks. This model consists of two phases: In the first phase, the secondary user (SU) listens to the spectrum allocated to the primary user ( 

Efficient discovery of spectrum opportunities with MAC-layer sensing in cognitive radio networks
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 Recent studies have shown that the use of static spectrum allocation has degraded spectral effi- ciency significantly [1  KIM AND SHIN: EFFICIENT DISCOVERY OF SPECTRUM OPPORTUNITIES WITH MAC-LAYER SENSING IN COGNITIVE RADIO NETWORKS 535 Fig. 

A wavelet approach to wideband spectrum sensing for cognitive radios
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 Current wireless systems are characterized by wasteful cognitive network of interest concerns spectrum  mobile devices, resulting in a Thus, many traditional spectral estimation techniques become surprisingly large portion of the radio spectrum goes unused. 

Sharing spectrum through spectrum policy reform and cognitive radio
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 than on area or population [51].) Giving each public safety agency its own dedicated communications channel leads to tremendous spectral inefficiencies.  The latter can be seen as a forerunner of cognitive radio, in that systems dynamically access spectrum after sensing its 

Eigenvalue-based spectrum sensing algorithms for cognitive radio
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INTRODUCTION A Cognitive Radio" senses the spectral environment over a wide range of frequency  the FCC issued a Notice of Proposed Rule Making that identifies cognitive radio as the candidate for implementing negotiated/opportunistic spectrum sharing [4]. In 

Design and Analysis of Opportunistic MAC Protocols for Cognitive Radio Wireless Networks
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 We propose various spectrum sharing schemes , opportunistic packet scheduling schemes , and spectrum sensing schemes in the MAC and physical (PHY ) layers for different types of cognitive radio networks , allowing the SUs to opportunistically utilize the licensed spectrum 

Self-organization paradigms and optimization approaches for cognitive radio technologies: a survey
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 radio environment in CRNs, new challenges may arise in designing cognitive routing algorithms  spectrum, and the frequency/space- domain characteristics of the radio environment  requirements by utilizing a single spectrum band, multiple noncontiguous spectrum bands can 

Dynamic spectrum access: from cognitive radio to network radio
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 require a PU change the existing tech- nology and infrastructure to facilitate spectrum sensing, as the  hence spectrum sharing can be more flexible, eg, SUs can access spectrum simultaneously as  To support the future DSA model, the cognitive radio is expected to have several 

Spectrum Sharing Method for Cognitive Radio in TV White Spaces
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1894-1912; Spectrum Sharing Method for Cognitive Radio in TV White Spaces; - Enhancing Spectrum Sensing and Geolocation Database; 

Improved Bandwidth Allocation in Cognitive Radio Networks Based on Game Theory
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 [2] Yucek T., Arslan H. A survey of spectrum sensing algorithms for cognitive radio applications Management in Cognitive Radio Networks IEEE Journal of Selected 

Cooperative relay techniques for cognitive radio systems: spectrum sensing and secondary user transmissions
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 Differing from [3], cognitive radio typically exploits the spectrum sensing to detect spectrum holes for secondary transmissions so that the primary and secondary users can share spectrum resources without harmful interference. 

Exploiting Rogue Signals to Attack Trust-based Cooperative Spectrum Sensing in Cognitive Radio Networks
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 Otherwise, these cognitive radios can unknowingly transmit signals  in more than one path. In other words, wireless radio signals bounce off physical obstructions, prop-  collaboration of sensors, called Cooperative Spectrum Sensing (CSS) has been proposed as an effective 

EE360 Project Proposal: Cooperative Spectrum Sensing for Cognitive Radio in Flat-Fading Environment
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 As presented in [3], one of the challenges in spectrum sensing is the hardware requirement since spectrum sensing needs high sampling rate, high resolution Analog-to  This challenge becomes more explicit in the cognitive radio applications of sensor network and 

Attack prevention for collaborative spectrum sensing in cognitive radio networks
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Model and Assumptions We consider an infrastructure-based secondary CRN, which consists of a single fusion center and a set of SUs (or sensors).  DUAN et al.: ATTACK PREVENTION FOR COLLABORATIVE SPECTRUM SENSING IN COGNITIVE RADIO NETWORKS 

Experimental evaluation of multiantenna spectrum sensing detectors using a cognitive radiotestbed
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 The availability of spectral resources is being limited by a growing demand of wireless services [1  Gredilla, D. Ramirez, J. Via, and I. San- tamaria, Bayesian multiantenna sensing for cognitive radio, GLRT-based spectrum sensing for cog 

cognitive radio spectrum sensing



Cyclostationary Detection Based Spectrum Sensing for Cognitive Radio Networks
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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

Literature Review of Cognitive Radio Spectrum Sensing EE 359 Project
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Due to the increased usage of wireless communications in personal, commercial, and governmental capacities, efficient spectrum utilization has become a prime topic of interest. The Federal Communications Commission (FCC) governs spectrum usage and allocates

Dynamic Spectrum Sensing Techniques For Cognitive Radio-Based Wireless Communication
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Abstract: Cognitive radio (CR) is a new paradigm wireless communication system which is use for efficient utilization of radio frequency (RF) spectrum or RF channel for future wireless communication. The motivation behind cognitive radio is the insufficiency of the existing Spectrum sensing is critically important for cognitive radio, an emerging solution to the spectrum congestion and low usage of licensed spectrum. Energy detection is a promising low-complexity and low-cost spectrum sensing technique. Its performance analysis has

Improving the Existing Spectrum Sensing Techniques for Cognitive Radio using Modulation Techniques
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Abstract: Cognitive Radio plays an important role in wireless communication. With the ever increasing demand for wireless communications, the spectrum has become a scarce resource. It is becoming a major obstacle for the development of new wireless

A Cooperative Spectrum Sensing Scheme Based on Extension Theory for Cognitive Radio Sensor Networks
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Abstract: This paper proposes a cooperative censoring spectrum sensing scheme based on dependent function of extension theory for Cognitive Radio Sensor Networks (CRSN). The scheme uses the dependent function of Extension theory to identify the presence or

Boosted Energy Detector Based Spectrum Sensing Methodology For Cognitive Radio
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Abstract: Proliferation of spectrum-based service, in the recent years have forced the human society to become highly dependent on the radio spectrum. It is therefore not surprising that we are facing a difficult situation in wireless communications. Cognitive radio, a novel

Novel Technique of Spectrum Sensitarget detection probability constraint
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Abstract Cognitive radio has attracted an increasing amount of interest over the past few years as an effective method of alleviating the spectrum scarcity problem in wireless communications. One of the most promising approaches in cognitive radio is the

Performance Evaluation of the Energy detection Using different Wavelet family for Spectrum Sensing in Cognitive radio
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Abstract: Cognitive radio is one of the novel concepts from conventional exclusive spectrum assignment to dynamic spectrum assign. They provide the spectrum for efficient and sufficient utilization of the radio electromagnetic resources. The cognitive Radio built on a

Performance Analysis of Energy Detection and Cooperative Spectrum Sensing Technique for Cognitive Radio over AWGN and Fading Channels
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Abstract:Spectrum sensing is the basic and important operation in Cognitive Radio (CR) to find the unused spectrum. This paper focuses on Energy detection because of ease in implementation and Cooperative Spectrum sensing because it doesn't require transmitted

Spectrum Sensing for Cognitive Radio Users using Constant Threshold Range in Energy Detector
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Abstract Spectrum Sensing has an important role in Cognitive Radio Network (CRN). Different methodologies have been proposed in the literature for spectrum sensing. Energy detector method is more practical and less in complexity. This paper presents analysis of

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

Optimization of Collaborative Spectrum Sensing Mechanism for Cognitive Radio
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Abstract: Cognitive radio (CR) is an enabling technology that helps efficiently use spectrum. In this paper, a collaborative spectrum sensing mechanism is proposed which combines passive detection and sensing service compensation. Theoretical analysis and

An Energy Approximation Model Based on Restricted Isometry Property in CompressiveSpectrum Sensing for Cognitive Radio
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BZ Li1, JH Shao2, and GN Wang1 1 Nanjing Normal University, Nanjing 210023, China 2 Optoelectronics Key Laboratory of Jiangsu Province, Nanjing 210023, China Email: 131002040@ stu. njnu. edu. cn; shaojianhua@ njnu. edu. cn; creation2010@ sina. cn

Performance Analysis of Distributed Coordinated Spectrum Sensing in Cognitive RadioNetworks
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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

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

Robust Multiband Spectrum Sensing in Cognitive Radio Networks via Exponentially Embedded Family Criterion
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Abstract:This paper proposes a robust spectrum sensing scheme for cognitive radio networks. The proposal performs spectrum sensing simultaneously over the total channels rather than a single channel at a time. It first estimates the number of occupied channels

Adaptive Double Threshold based Spectrum Sensing for Cognitive Radio Networks
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Abstract Rapid growth of wireless communication and limited spectrum availability to support the applications and services, has led to the development of cognitive radio as promising solution to address the problem of spectrum scarcity. Spectrum sensing is one

Iterative Second-Order Moment-Based Spectrum Sensing Algorithm in a Cognitive RadioContext
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Abstract:This paper deals with a second-order moment-based spectrum sensing algorithm in a cognitive radio context. Based on a joint and iterative channel and noise variance estimator for OFDM systems, the method accurately estimates the noise variance when

Random Matrix Theory Based Cognitive Radio Spectrum Sensing
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Abstract: A cognitive radio system allows higher data transmission rates due to the efficient spectrum utilization. Spectrum sensing plays a substantial role in such a cognition scenario. In this paper, a novel multiple antenna sensing algorithm is proposed for detecting the

Matched filter based spectrum sensing for cognitive radio at low signal to noise ratio
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ABSTRACT Custom usage of a Cognitive Radio is administrated by the essential utilization aspect of the radio spectrum the natural resource. Cognitive radio trying to resourcefully share the radio spectrum along with potential primary users in the spectrum that must be

Cooperative Spectrum Sensing over Correlated Rayleigh Fading Channels in Cognitive Radio using Factor Graph
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(CR) environments is generally modelled as a distributed binary hypothesis testing problem. However, modelling of the system in presence of correlated multipath-fading is an important issue. It deals with complex dependencies of large number of random variables. Earlier

EVALUATION OF DIFFERENT SPECTRUM SENSING TECHNIQUES FOR REALISTIC IMPLEMENTATION ORIENTED MODEL IN COGNITIVE RADIO
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ABSTRACT In this paper, the performance assessment of five different detection techniques from spectrum sensing perspective in cognitive radio networks is proposed and implemented using the realistic implementation oriented model (R-model) with signal

Super-allocation and Cluster-based Cooperative Spectrum Sensing in Cognitive RadioNetworks
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Abstract An allocation of sensing and reporting times is proposed to improve the sensing performance by scheduling them in an efficient way for cognitive radio networks with cluster- based cooperative spectrum sensing. In the conventional cooperative sensing scheme, all

Matched-Filter-based Spectrum Sensing for Secure Cognitive Radio Network Communications
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ABSTRACT The increasing demand for wireless communication introduces efficient spectrum utilization challenge. To address this challenge, Cognitive Radio (CR) has emerged as the key technology, which enables opportunistic access to the spectrum.

An Algorithm for Spectrum Sensing in Cognitive Radio under Noise Uncertainty
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Abstract With increasing demand of new wireless applications and increasing number of wireless user's problem of spectrum scarcity arises. Cognitive Radio technology supports dynamic spectrum access to address spectrum scarcity problem. Reliability of cognitive

A Survey on Data and Decision Fusion Strategies on Spectrum Sensing in Cognitive Radio Networks
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Abstract:Cognitive radio is a promising technology which provides a novel way to improve utilization of available spectrum. Spectrum sensing is a fundamental problem for cognitive radio. Cooperative spectrum sensing is an efficient way to detect spectrum holes in

Efficient Spectrum Sensing and Testbed Development for Cognitive Radio Based Wireless Sensor Networks
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Abstract Problem of spectrum scarcity has not only affected cellular communication bands but is continuously pushing freely available ISM bands to its limits. Devices which work in ISM band were developed without the consideration of co-existence and interoperability.

An Enhanced Cooperative Spectrum Sensing with Wavelet Denoising and Softened Hard Decision for Cognitive Radio Networks
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Abstract Cognitive Radio (CR) is a novel technology that can improve the utilization efficiency of the radio spectrum and also address the spectrum scarcity problem by opportunistically using the unused channels (spectrum holes/white spaces) in the

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

Spectrum Sensing, Access, and Leasing in Cognitive Radio Networks
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Abstract Cognitive radio has been considered as a promising way to deal with the overcrowded wireless spectrum. In cognitive radio, when licensed users (primary users) do not use their licensed spectrum, they may lease the spectrum to unlicensed users (

Adaptive Retry Time Based MAC Layer Spectrum Sensing for Cognitive Radio Networks
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ABSTRACT Spectrum sensing is an important issue for dynamic spectrum sharing in cognitive radio networks. The physical layer senses the availability of the primary users channels whereas the MAC layer decides how often, at which time duration and in which

Study of Cognitive Radio Spectrum Sensing Algorithm Based on Compressed Sensing
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Sensing of Spectrum Holes in Cognitive Radio Networks: A Survey
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Abstract:Cognitive Radio (CR) has risen as a tempting solution to the problem of spectral inefficiency as it performs sensing of the radio environment, sharing it without harmful interference to Primary Users (PU) and quickly quitting the frequency band if the

Spectrum Sensing and Interference Mitigation in Cognitive Radio Networks
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Abstract One concept to increase spectral efficiency is dynamic spectrum access (DSA). The secondary users coexist with the primary users in the same radio-frequency spectrum. Such shared usage demands for an interference avoidance or interference mitigation at the

Efficient Spectrum Sensing Pattern Using Intelligent Matrix in Cognitive Radio Network
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Abstract Cognitive radio (CR) can successfully deal with the growing demand and scarcity of the wireless spectrum. To exploit limited spectrum efficiently, CR technology allows unlicensed users to access licensed spectrum bands. Since licensed users have priorities

Spectrum Sensing in Cognitive Radio Networks
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Abstract Given the ever-growing demand for radio spectrum, cognitive radio has recently emerged as an attractive wireless communication technology. To put cognitive radio technology into practice, the cognitive radios need to monitor the spectrum activities

Performance EvaluationBased on Energy Detection and Operational Interval of Spectrum Sensing In Cognitive Radio
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Abstract Cognitive radio is an intelligent communication system which focus on dynamic spectrum usage rather than fixed spectrum assignment. Cooperative spectrum sensing is a technique for detecting the primary user accurately based on information collected from

NOVEL SPECTRUM SENSING AND ALLOCATION USING COGNITIVE RADIO AD HOC NETWORKS
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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
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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

Statistical Test based Comparison of Spectrum Sensing Techniques in Cognitive RadioNetwork
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Abstract Cognitive radio is an intelligent wireless technology that increases the spectrum efficiency for its usage. CR enriches wireless technology by utilizing the spectrum holes in order to provide high order quality service to users and to minimize the interference that


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