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Journal Article The Impact of Opportunistic User Scheduling on Outage Probability of CR-MIMO Systems
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Authors
Donghun LEE, Byung Jang JEONG
Issue Date
2014-03
Citation
IEICE Transactions on Communications, v.E97.B, no.3, pp.686-690
ISSN
1745-1345
Publisher
일본, 전자정보통신학회 (IEICE)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1587/transcom.E97.B.686
Project Code
13PR1200, Development of the Spectrum Super-highway Technology for Mobile Big-bang, Choi Jae Ick
Abstract
In this paper, we study the impact of opportunistic user scheduling on the outage probability of cognitive radio (CR) multiple-input multiple-output (MIMO) systems in the high power region where the peak transmit power constraint is higher than the peak interference constraint. The primary contributions of this paper are the derivation of exact closedform expressions of the proposed scheduled CR-MIMO systems for outage probability and asymptotic analysis to quantify the diversity order and signal to noise ratio (SNR) gain. Through exact analytical results, we provide the achievable outage probability of the proposed scheduled systems as a function of SNR. Also, through asymptotic analysis, we show that the scheduled CR-MIMO systems provide some diversity order gain over the non-scheduled CR-MIMO systems which comes from multi-user diversity (MUD). Also, the SNR gain of the proposed scheduled systems is identical to that of the non-scheduled CR-MIMO systems. Copyright © 2014 The Institute of Electronics, Information and Communication Engineers.
KSP Keywords
Asymptotic analysis, Diversity Order, High power, Information and communication, Multiple-input multiple-output (MIMO) systems, Multiuser diversity, Opportunistic user scheduling, Outage probability(OP), Peak interference constraint, Power Constraint, Signal noise ratio(SNR)