NDLI: Performance study of opportunistic scheduling in dual-hop multi-user underlay cognitive network

Content Provider	IET Digital Library
Author	Hussein, Jamal Ikki, Salama Boussakta, Said Tsimenidis, Charalampos
Abstract	In this study, the authors investigate the performance of opportunistic scheduling for the dual-hop amplify-and-forward multi-user cognitive relaying network. Expressions are derived for the cumulative distribution function (CDF) and probability density function of the equivalent signal-to-noise ratio (SNR). From the derived CDF, the outage performance of the cognitive network is investigated. Then, an expression for average error probability is derived. Furthermore, simple and generic asymptotic expressions for the outage and error probabilities are obtained and discussed. In addition, a closed-form expression for the system's ergodic capacity is derived. Their asymptotic results show that opportunistic scheduling has no impact on diversity gain. It is confirmed that the array gain determines the SNR advantage of opportunistic scheduling over the single-user scenario. Moreover, they study adaptive power allocation under the total transmit power constraint in order to minimise the average error probability. As expected, the results show that optimum power allocation improves system performance compared with uniform power allocation. Finally, numerical results and Monte Carlo simulations are also provided to support the correctness of the analytical calculations.
Starting Page	558
Ending Page	566
Page Count	9
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 5, Mar (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0906
Journal	IET Communications
Publisher Date	2016-03-24
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Power Allocation Amplify And Forward Communication Average Error Probability Minimization CDF Closed-form Expression Cognitive Radio Cumulative Distribution Function Diversity Gain Dual-hop Amplify-and-forward Multiuser Cognitive Relaying Network Error Statistics Generic Asymptotic Expressions Monte Carlo Simulation Method Opportunistic Scheduling Outage Probability Probability Probability Density Function Radio Link And Equipment Relay Network Signal to Noise Ratio SNR Statistics System Ergodic Capacity Telecommunication Telecommunication Scheduling Total Transmit Power Constraint
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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