Journal ArticleDOI
Effective capacity of delay-constrained cognitive radio in Nakagami fading channels
Leila Musavian,Sonia Aissa +1 more
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This paper considers coexistence of secondary and primary users who share particular portions of the spectrum and proposes a delay-constrained power and rate allocation scheme for the secondary user link, and derives the optimal rate and power adaptation policy that maximizes the effective capacity of the channel.Abstract:
In this paper, we consider coexistence of secondary and primary users who share particular portions of the spectrum and propose a delay-constrained power and rate allocation scheme for the secondary user link. Secondary users are allowed to access the spectrum occupied by a primary user subject to satisfying interference-power limitations imposed by the primary user. Applying this limitation, we obtain the maximum arrival-rate supported by the secondary channel in Nakagami-m block-fading environment subject to satisfying a given statistical delay quality-of-service (QoS) constraint. In this respect, we derive the optimal rate and power adaptation policy that maximizes the effective capacity of the channel, and provide closed-form expressions for the power allocation and the effective capacity. In addition, we obtain closed-form expressions for the expenditure-power that is required at the secondary transmitter to achieve the above-mentioned capacity metric. Moreover, for comparison purposes, we consider two widely deployed power allocation strategies, namely, optimal power and rate allocation (opra) and channel inversion with fixed rate (cifr), and investigate the effective capacity of the channel under these power transmission techniques. Numerical simulations are conducted to corroborate our theoretical results.read more
Citations
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Journal ArticleDOI
Cognitive radio in 5G: a perspective on energy-spectral efficiency trade-off
TL;DR: It is shown how EE-SE trade-off studies can be performed systematically with respect to different architectures, levels of analysis, and capacity metrics, to lead to important insights and useful design guidelines for future cognitive cellular networks.
Journal ArticleDOI
A Hybrid Underlay/Overlay Transmission Mode for Cognitive Radio Networks with Statistical Quality-of-Service Provisioning
TL;DR: This paper develops a hybrid underlay/overlay transmission mode for cognitive radio networks, through which the cognitive users' QoS requirements can be better guaranteed and network throughput can be further improved.
Journal ArticleDOI
Effective Capacity in Wireless Networks: A Comprehensive Survey
TL;DR: This paper provides a comprehensive survey on existing works, that use the Effective capacity (EC) model in various wireless networks, and summarizes the work related to EC for different networks, such as cognitive radio networks (CRNs), cellular networks, relay networks, adhoc Networks, and mesh networks.
Journal ArticleDOI
Throughput of Cognitive Radio Systems with Finite Blocklength Codes
Gozde Ozcan,M. Cenk Gursoy +1 more
TL;DR: Throughput achieved in cognitive radio channels with finite blocklength codes under buffer limitations is studied, characterizing the maximum constant arrival rates that can be supported by the cognitive radio channel while satisfying certain limits on buffer violation probabilities.
Journal ArticleDOI
Wireless Throughput and Energy Efficiency With Random Arrivals and Statistical Queuing Constraints
Mustafa Ozmen,M. Cenk Gursoy +1 more
TL;DR: Overall, the impact of source characteristics, QoS requirements, and channel fading correlations on the throughput and energy efficiency of wireless systems is identified.
References
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Journal ArticleDOI
Handbook of Mathematical Functions
Book
Table of Integrals, Series, and Products
TL;DR: Combinations involving trigonometric and hyperbolic functions and power 5 Indefinite Integrals of Special Functions 6 Definite Integral Integral Functions 7.Associated Legendre Functions 8 Special Functions 9 Hypergeometric Functions 10 Vector Field Theory 11 Algebraic Inequalities 12 Integral Inequality 13 Matrices and related results 14 Determinants 15 Norms 16 Ordinary differential equations 17 Fourier, Laplace, and Mellin Transforms 18 The z-transform
Journal ArticleDOI
Cognitive radio: brain-empowered wireless communications
TL;DR: Following the discussion of interference temperature as a new metric for the quantification and management of interference, the paper addresses three fundamental cognitive tasks: radio-scene analysis, channel-state estimation and predictive modeling, and the emergent behavior of cognitive radio.
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Digital Communication over Fading Channels
TL;DR: The book gives many numerical illustrations expressed in large collections of system performance curves, allowing the researchers or system designers to perform trade-off studies of the average bit error rate and symbol error rate.
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