Performance Analysis for Cognitive Radio Networks PDF Download

Author: Shuyu Ping
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Preston Marshall
Publisher: Artech House
ISBN: 1608070980
Category : Science
Languages : en
Pages : 479

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Book Description
Cognitive radio – a paradigm for wireless communication in which either a network or a wireless node changes its transmission or reception parameters to communicate more efficiently and avoid interference -- is one of the most exciting emerging fields in communications technology. Taking an integrated development approach, this cutting-edge book provides you with clear methods for performing quantitative analysis of cognitive radio techniques in a variety of environments. This detailed reference presents a quantitative structure that helps you determine the capability of cognitive radio to address a number of constraints of current radio design. Critical to understanding the operation of cognitive radio, the book develops an analytic model for a range of spectrum environments. Moreover, this unique resource offers you unique insight into the application of dynamic spectrum access (DSA) to improve the performance of all classes of wireless devices. DVD Included! Contains sample cognitive radio environments and closed form approximations of these environments in MATLAB file format. This data enables you to reproduce the analysis provided in the book, perform the exercises in each chapter, and extend the work through independent investigation and research.

Author: Kamal Chapagain
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659610707
Category :
Languages : en
Pages : 64

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Book Description
In cognitive radio system, secondary users are queued when primary users are utilizing its own channel. In that case secondary transmitters are idle and waiting for that channel to be freed. If so, why not use that idle secondary transmitter for primary users as helping hands by transmitting primary's data. This book explore the scarcity and management of current spectrum issue and proper management in three distinct methodologies. Firstly, Field surveying of spectrum within the range of 0.1 GHz to 3 GHz is done for finding white space. Secondly, white space is managed using user friendly graphical environment programmed in Matlab. Finally, performance is increased by reducing waiting delay in queue for secondary users. Sharing 50% of primary users' data by secondary transmitter, performance is increased up to 41% based on traffic load of incoming data on server and better on high traffic. Wireless Regional Area Network IEEE 802.22 parameters with data rate 24 Mbps is used for simulation in Matlab.

Author: Yanxiao Zhao
Publisher:
ISBN:
Category : Cognitive radio networks
Languages : en
Pages : 216

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Author:
Publisher:
ISBN: 9789172952492
Category :
Languages : en
Pages : 180

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Author: Paul A. Potier
Publisher:
ISBN:
Category : Cognitive radio networks
Languages : en
Pages : 196

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Book Description

Author: Ajay Singh
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659397349
Category :
Languages : en
Pages : 124

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Book Description
The book in hand is the result of converting the idea of cognitive radio in satellite communications. A major part of the book has resulted from the outcome of the research done by author. This book covers many aspects of cognitive radio based satellite communications, specially issues related to spectrum sensing. This book starts with introduction of satellite communications and the role of cognitive radio for spectrum sensing in satellite communications. We introduce a framework to study the probability of error in sensing the spectrum. We also discuss cooperative spectrum sensing along with throughput and energy consumption in a cognitive radio based satellite network. The derived analytical results in this book will help in the study of performance of cognitive wireless systems, which have found useful applications in spectrum sensing in satellite communications. This book will be useful to academicians and researchers who want to explore the ideas of cognitive radios in satellite communications.

Author: Ahmed Khattab
Publisher: Springer Science & Business Media
ISBN: 1461440335
Category : Technology & Engineering
Languages : en
Pages : 125

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Book Description
This book describes a communication paradigm that could shape the future of wireless communication networks, Opportunistic Spectrum Access (OSA) in Cognitive Radio Networks (CRN). While several theoretical OSA approaches have been proposed, they are challenged by the practical limitations of cognitive radios: the key enabling technology of OSA. This book presents an unprecedented formulation of the OSA problem in CNR that takes into account the practical limitations encountered due to existing technologies. Based on such a problem formulation, this book presents a framework and protocol details implementing the analytically-optimized solution of this problem. Unlike the state-of-the-art of CRN implementations that typically target software define radios which are not suitable for real systems, this book describes the implementation of distributed OSA, using practical radio transceiver technologies. It provides a thorough characterization of the gains available to theoretical OSA approaches if the practical limitations are taken into consideration. Tackles the cognitive radio networks performance optimization problem, taking into account the practical limitations of today’s technologies; Provides thorough performance evaluation in arbitrary, large-scale networks, as well as microscopic, small-scale performance evaluation, using realistic hardware implementation; Presents an empirical study of the gains available over existing techniques by adopting practical approaches; Tackles the cognitive radio networks performance optimization problem, taking into account the practical limitations of today’s technologies; Provides thorough performance evaluation in arbitrary, large-scale networks, as well as microscopic, small-scale performance evaluation, using realistic hardware implementation; Presents an empirical study of the gains available over existing techniques by adopting practical approaches;

Author: Sepehr Khodadadi
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Cognitive radio technology is to improve the inefficient usage of limited spectrum resources when wireless networks coexist. Using this technology, the unlicensed users (secondary users) can opportunistically access the frequency band of licensed users (primary users). There are different kinds of cognitive radio networks. This thesis focuses on the interweave cognitive radio network, where the secondary users are only allowed to access the spectrum holes, i.e., the idle parts of the licensed spectrum band. The main task is to analyze the opportunistic dynamic spectrum allocation method based on selecting the largest available spectrum hole, where the goal is to have the maximum possible transmission rate for secondary users. The objective of this work is to give the service provider an estimation about the load of secondary users in different numbers of channels and various kinds of traffics in primary networks. The work starts with the investigation on the spectrum allocation for secondary users in a network of single-channel primary users. In our analysis, we propose a theoretical model to calculate the probability distribution of the length of the largest available spectrum hole. The contribution of this part is the modeling and performance analysis of the existing conventional method, which selects the largest available spectrum hole. The main contribution is the calculation of the conditional probability of having maximum consecutive idle channels under the condition of a given number of total channels and various number of busy channels. For any given number of channels, this conditional probability gives us the number of consecutive idle channels the secondary user can have, if we know the probability distribution of busy channels taken by primary users. The theoretical model works for any given number of total channels in the licensed frequency band, with numerical and simulation results confirming the precision of the proposed model. Later, we continue our study on the spectrum allocation in a cognitive radio network of multichannel primary users, where the secondary user temporarily takes the largest available spectrum hole. For the performance analysis, we basically need to solve two problems. First, we need to find the probability distribution of busy channels taken by primary users. Second, we need to determine the length of the largest available spectrum hole under the condition of primary users taking different channels. In the case of primary users taking multiple channels, the calculation of the conditional probability of having maximum consecutive idle channels under the condition of a given number of total channels and various number of busy channels, is approximately valid, especially in low-traffic networks. As such, the main contribution in this part is finding the probability distribution of busy channels taken by primary users. The solution scenario is based on a multidimensional Markov chain, with numerical and simulation results verifying the accuracy of the proposed model. Finally, an approximate one-dimensional Markov chain is also proposed to simplify the complicated multidimensional solution. We provide an approximate estimation for the load of the secondary user to avoid the calculation of the complex multidimensional Markov chain. The procedure significantly decreases the complexity, although we lose some information. The main concern in the one-dimensional approximation is to find the departure rates from each state of busy channels. It is actually the main challenge of this part and by approximation we provide the solution. At the end, the performance of the proposed model was validated by numerical and simulation results.

Author: Wei Zhang
Publisher: Springer
ISBN: 9789811013935
Category : Technology & Engineering
Languages : en
Pages : 0

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Book Description
This major reference work provides the most up-to-date research advances and theories in cognitive radio technology, from cognitive radio principles and theory to cognitive radio standards and systems, from fundamental limits of cognitive radio channels to cognitive radio networks, from the current cognitive radio practices and examples to future 5G cognitive cellular networks. This handbook will include some emerging applications of cognitive radio in areas such as smart grid, internet-of-things, big data, small cell/heterogeneous networks, and in 5G. The potential readers include postgraduate students, academic staff, telecommunications engineering, spectrum policy makers, and industry entrepreneurs.