Impact of varying channel model mixtures on radio resource management for the OFDMA downlink Sivridis, Leonidas, Wang, Xinheng and Choi, Jinho 2011, Impact of varying channel model mixtures on radio resource management for the OFDMA downlink, International Journal of Communication Networks and Information Security, vol. 3, no. 2, pp. 186-192. Attached Files Name Description MIMEType Size Downloads Title Impact of varying channel model mixtures on radio resource management for the OFDMA downlink Author(s) Sivridis, Leonidas Wang, Xinheng Choi, Jinho orcid.org/0000-0002-4895-6680 Journal name International Journal of Communication Networks and Information Security Volume number 3 Issue number 2 Start page 186 End page 192 Total pages 7 Publisher Kohat University of Science and Technology, Institute of Information Technology Place of publication Kohat, Pakistan Publication date 2011-10-07 ISSN 2076-0930 2073-607X Keyword(s) OFDMA CSI power delay profile radio resource management Summary Adaptive resource allocation can drastically increase the throughput of an Orthogonal Frequency Division Multiple Access (OFDMA) system when the Channel State Information (CSI) is accurately known. Unfortunately, in practice, perfect CSI is rarely possible. In this paper, we study the efficiency of the OFDMA downlink for different vehicular user densities. In order to do so we assume that the transmitter knows the instantaneous CSI (ICSI) of the pedestrian users but only the statistical CSI (SCSI) of the users that exhibit high mobility (vehicular). We then address the problem of maximizing the sum-capacity of the system subject to user minimum Quality of Service (QoS) requirements. It is shown that when only the user SCSI is known loading channels with a rate equal to the Lambert W function of the average SNR leads to optimal channel utilization and important system throughput gains. Moreover, the impact of different channel models on the system throughput is investigated. The results show that the vehicular users can highly benefit from adaptive resource allocation under the assumption that their CSI is known by the transmitter. Language eng HERDC Research category C1.1 Refereed article in a scholarly journal Copyright notice ©2011, The Authors Persistent URL http://hdl.handle.net/10536/DRO/DU:30115887 Document type: Journal Article Collections: Faculty of Science, Engineering and Built Environment School of Information Technology Related Links Link Description Connect to Elements publication management system Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Tue, 04 Dec 2018, 10:30:27 EST Tue, 04 Dec 2018, 10:32:21 EST Wed, 05 Dec 2018, 14:28:39 EST Wed, 05 Dec 2018, 15:30:18 EST Wed, 05 Dec 2018, 15:32:50 EST Wed, 05 Dec 2018, 15:35:32 EST Filtered Full Citation counts:   Cited 0 times in TR Web of Science Cited 1 times in Scopus Search Google Scholar Access Statistics: 201 Abstract Views, 0 File Downloads  -  Detailed Statistics Created: Tue, 04 Dec 2018, 10:30:27 EST