Adaptive modulation and coding techniques for OFDMA systems

Author

Fantacci, Romano ; Marabissi, Dania ; Tarchi, Daniele ; Habib, Ibrahim

Author_Institution

Dept. of Electron. & Telecommun., Univ. of Florence, Firenze, Italy

Volume

8

Issue

9

fYear

2009

fDate

9/1/2009 12:00:00 AM

Firstpage

4876

Lastpage

4883

Abstract

The demand for high-speed services and multimedia applications anywhere and anytime has led to the rise of wireless communications. In particular, WiMAX technology is nowadays considered one of the most prominent solutions capable to provide a Broadband Wireless Access (BWA) in metropolitan areas with a simpler installation and lower cost than traditional wired alternatives. This paper deals with the proposal of efficient adaptive modulation and coding techniques to be used in WiMAX based wireless networks, that allow to improve network performance in the case of Non Line-of-Sight communications, which are typical in urban environments. Through these techniques it is possible to switch the modulation order and coding rate in order to better match the channel conditions, and, hence, obtaining better performance both in terms of error probability and data throughput.

Keywords

WiMax; adaptive modulation; encoding; frequency division multiple access; radiocommunication; OFDMA systems; WiMAX based wireless networks; WiMAX technology; adaptive coding; adaptive modulation; broadband wireless access; error probability; high-speed services; metropolitan areas; multimedia applications; non line-of-sight communications; wireless communications; Communication switching; Costs; Error probability; Modulation coding; Proposals; Switches; Urban areas; WiMAX; Wireless communication; Wireless networks; IEEE 802.16; OFDMA; WiMAX; adaptive modulation and coding; broadband wireless access;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2009.090253

Filename

5285209