Performance analysis of switch-based multiuser scheduling schemes with adaptive modulation in spectrum sharing systems
Type
ArticleKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
Date
2014-04-28Online Publication Date
2014-04-28Print Publication Date
2015-12-10Permanent link to this record
http://hdl.handle.net/10754/566145
Metadata
Show full item recordAbstract
This paper focuses on the development of multiuser access schemes for spectrum sharing systems whereby secondary users are allowed to share the spectrum with primary users under the condition that the interference observed at the primary receiver is below a predetermined threshold. In particular, two scheduling schemes are proposed for selecting a user among those that satisfy the interference constraint and achieve an acceptable signal-to-noise ratio level. The first scheme focuses on optimizing the average spectral efficiency by selecting the user that reports the best channel quality. In order to alleviate the relatively high feedback required by the first scheme, a second scheme based on the concept of switched diversity is proposed, where the base station (BS) scans the secondary users in a sequential manner until a user whose channel quality is above an acceptable predetermined threshold is found. We develop expressions for the statistics of the signal-to-interference and noise ratio as well as the average spectral efficiency, average feedback load, and the delay at the secondary BS. We then present numerical results for the effect of the number of users and the interference constraint on the optimal switching threshold and the system performance and show that our analysis results are in perfect agreement with the numerical results. © 2014 John Wiley & Sons, Ltd.Citation
Qaraqe, M., Abdallah, M., Serpedin, E., & Alouini, M.-S. (2014). Performance analysis of switch-based multiuser scheduling schemes with adaptive modulation in spectrum sharing systems. Wireless Communications and Mobile Computing, 15(17), 2095–2110. doi:10.1002/wcm.2480Publisher
WileyDOI
10.1002/wcm.2480ae974a485f413a2113503eed53cd6c53
10.1002/wcm.2480