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ThinkMind // ICWMC 2014, The Tenth International Conference on Wireless and Mobile Communications // View article icwmc_2014_2_30_20170


Performance Enhancement of Heterogeneous Networks via Dense Clusterization and Higher Order Modulation

Authors:
Ahmed Elhamy
Ahmed Ibrahim

Keywords: Heterogeneous Networks; Higher Order Modulation; Outdoor Small Cells; 256QAM; Transmitter & Receiver Impairments.

Abstract:
Heterogeneous Networks are introduced in LTE-Advanced in order to fulfill the demanding necessity for more network capacity by the deployment of small cell nodes. In this paper, we study the dense deployment of small cells in hotspot to cover the users’ data requests. The aim is to determine the optimum number of outdoor nodes per hotspot to achieve highest average user throughput. The results indicate that there is a range of optimum number of small cell nodes depending on the density of data traffic and the trade-off between available capacity and inter small cell interference. Introducing the small cells layer results in better channel conditions for some users that are close to small cells nodes. Thus, this encourages the usage of higher order modulation schemes like 256QAM. Adopting 256QAM infers that impairments caused by transmitter and receiver circuitry should be considered while evaluating the feasibility of 256QAM for outdoor small cells in heterogeneous networks. Results show that impairments have considerable negative effect on 256QAM throughput gains compared impairments-free system.

Pages: 37 to 42

Copyright: Copyright (c) IARIA, 2014

Publication date: June 22, 2014

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-347-6

Location: Seville, Spain

Dates: from June 22, 2014 to June 26, 2014

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