Adaptive OFDM system for multi-rate multi-user services in wireless communications

Jaekyoung Moon, Soon Yong Park, Sangjin Hong

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

This paper investigates performance and throughput of an adaptive bit allocation and variable rate algorithm depending on channel state information (CSI) and a transmit power in a multi-user OFDM transmission. The purpose of the presented multi-rate OFDM system using adaptive modulation is to increase bandwidth efficiency by controlling constellation size and to adapt proper service for each user according to channel conditions and the transmit power while maintaining transmission's quality of service (QoS) at the receiver. A fixed-rate adaptive OFDM system only exploits instantaneous channel state information by using several modulation levels, but it is inappropriate to a multi-rate multi-user services. On the contrary, multi-rate adaptive OFDM system is very efficient to multi-user system requiring various services, because this system exploits not only instantaneous channel state information but also the transmit power. Computer simulation results show that the capacity of the adaptive multi-rate OFDM system can be adoptively changed for various services. And performance and throughput analysis of this system in multipath fading channel with different RMS delay spread is also presented.

Original languageEnglish
Title of host publication5th International Symposium on Wireless Personal Multimedia Communications, WPMC 2002 - Proceedings
PublisherIEEE Computer Society
Pages1039-1043
Number of pages5
ISBN (Electronic)0780374428
DOIs
StatePublished - 2002
Event5th International Symposium on Wireless Personal Multimedia Communications, WPMC 2002 - Honolulu, United States
Duration: 27 Oct 200230 Oct 2002

Publication series

NameInternational Symposium on Wireless Personal Multimedia Communications, WPMC
Volume3
ISSN (Print)1347-6890

Conference

Conference5th International Symposium on Wireless Personal Multimedia Communications, WPMC 2002
Country/TerritoryUnited States
CityHonolulu
Period27/10/0230/10/02

Keywords

  • Adaptive OFDM modulation
  • Multi-rate Multi-user Services

Fingerprint

Dive into the research topics of 'Adaptive OFDM system for multi-rate multi-user services in wireless communications'. Together they form a unique fingerprint.

Cite this