An adaptive MQAM modulator for fixed wireless ATM networks

Author

Mohammadi, Abbas ; Kumar, Surinder

Author_Institution

EE Dept., Amirkabir Univ. of Technol., Tehran, Iran

Volume

5

fYear

2001

fDate

2001

Firstpage

1391

Abstract

This paper discusses various challenges to realize a fixed wireless ATM network and provides solutions to these challenges. The capacity allocation in wireless ATM, wireless link impact on ATM traffic, and optimum utilisation of the wireless network resources for a LOS wireless ATM link are studied. An adaptive MQAM modulator is introduced to provide an optimum solution to these problems. The modulator level is adjusted using a unique QoS metric in a wireless ATM network. The metric, termed modified effective bandwidth, takes into account the bandwidth demand, QoS requirements, and outage conditions of the wireless ATM link. A performance study using VBR MPEG-1 video traffic in a fixed wireless channel (Ricean channel) demonstrates the advantages of the proposed system

Keywords

Rician channels; adaptive modulation; asynchronous transfer mode; quadrature amplitude modulation; quality of service; radio links; visual communication; ATM traffic; LOS wireless ATM link; QoS metric; QoS requirements; Ricean channel; VBR MPEG-1 video traffic; adaptive MQAM modulator; bandwidth demand; capacity allocation; fixed wireless ATM networks; fixed wireless channel; modified effective bandwidth; modulator level; optimum utilisation; outage conditions; wireless link impact; Asynchronous transfer mode; Bandwidth; Broadband communication; Design optimization; Loss measurement; Quality of service; Telecommunication traffic; Traffic control; Transmitters; Wireless networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2001. ICC 2001. IEEE International Conference on

Conference_Location

Helsinki

Print_ISBN

0-7803-7097-1

Type

conf

DOI

10.1109/ICC.2001.937149

Filename

937149