A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission

Cheong Yui Wong, C. Y. Tsui, Roger S. Cheng, Khaled Letaief

Research output: Chapter in Book/Report/Conference proceedingConference contribution

192 Citations (Scopus)

Abstract

In this paper, we propose sub-carrier allocation algorithms for a multiple access scheme in downlink OFDM transmission. Knowing the channel characteristics of all the users at the base station, the sub-carrier allocation algorithm assigns sub-carriers to the users in a way that the total transmit power is minimized. An optimal algorithm is presented to provide the hest sub-carrier assignment. The complexity of the optimal solution renders it impractical for real-time application. To deal with the frequently changing channel characteristic of a fast time-varying multipath fading channel, a heuristic algorithm based on constructive assignment and iterative improvement is proposed which can give out a valid solution In real time. Experimental results show that the performance of this real-time algorithm is close to that of the optimal allocation.

Original languageEnglish
Title of host publicationVTC 1999-Fall: IEEE VTS 50th Vehicular Technology Conference
Pages1124-1128
Number of pages5
Volume50
Edition2
DOIs
Publication statusPublished - 1999
Externally publishedYes
EventIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall - Amsterdam, Netherlands
Duration: 19 Sep 199922 Sep 1999

Other

OtherIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
CountryNetherlands
CityAmsterdam
Period19/9/9922/9/99

Fingerprint

Subcarrier Allocation
Multiple Access
Orthogonal Frequency Division multiplexing (OFDM)
Orthogonal frequency division multiplexing
Real-time
Assignment
Optimal Allocation
Multipath
Fading Channels
Optimal Algorithm
Heuristic algorithm
Assign
Multipath fading
Time-varying
Heuristic algorithms
Optimal Solution
Base stations
Fading channels
Valid
Experimental Results

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Wong, C. Y., Tsui, C. Y., Cheng, R. S., & Letaief, K. (1999). A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission. In VTC 1999-Fall: IEEE VTS 50th Vehicular Technology Conference (2 ed., Vol. 50, pp. 1124-1128). [798611] https://doi.org/10.1109/VETECF.1999.798611

A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission. / Wong, Cheong Yui; Tsui, C. Y.; Cheng, Roger S.; Letaief, Khaled.

VTC 1999-Fall: IEEE VTS 50th Vehicular Technology Conference. Vol. 50 2. ed. 1999. p. 1124-1128 798611.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wong, CY, Tsui, CY, Cheng, RS & Letaief, K 1999, A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission. in VTC 1999-Fall: IEEE VTS 50th Vehicular Technology Conference. 2 edn, vol. 50, 798611, pp. 1124-1128, IEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall, Amsterdam, Netherlands, 19/9/99. https://doi.org/10.1109/VETECF.1999.798611
Wong CY, Tsui CY, Cheng RS, Letaief K. A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission. In VTC 1999-Fall: IEEE VTS 50th Vehicular Technology Conference. 2 ed. Vol. 50. 1999. p. 1124-1128. 798611 https://doi.org/10.1109/VETECF.1999.798611
Wong, Cheong Yui ; Tsui, C. Y. ; Cheng, Roger S. ; Letaief, Khaled. / A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission. VTC 1999-Fall: IEEE VTS 50th Vehicular Technology Conference. Vol. 50 2. ed. 1999. pp. 1124-1128
@inproceedings{377d489405714ef4a94ca31fc00f2739,
title = "A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission",
abstract = "In this paper, we propose sub-carrier allocation algorithms for a multiple access scheme in downlink OFDM transmission. Knowing the channel characteristics of all the users at the base station, the sub-carrier allocation algorithm assigns sub-carriers to the users in a way that the total transmit power is minimized. An optimal algorithm is presented to provide the hest sub-carrier assignment. The complexity of the optimal solution renders it impractical for real-time application. To deal with the frequently changing channel characteristic of a fast time-varying multipath fading channel, a heuristic algorithm based on constructive assignment and iterative improvement is proposed which can give out a valid solution In real time. Experimental results show that the performance of this real-time algorithm is close to that of the optimal allocation.",
author = "Wong, {Cheong Yui} and Tsui, {C. Y.} and Cheng, {Roger S.} and Khaled Letaief",
year = "1999",
doi = "10.1109/VETECF.1999.798611",
language = "English",
isbn = "0780354354",
volume = "50",
pages = "1124--1128",
booktitle = "VTC 1999-Fall: IEEE VTS 50th Vehicular Technology Conference",
edition = "2",

}

TY - GEN

T1 - A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission

AU - Wong, Cheong Yui

AU - Tsui, C. Y.

AU - Cheng, Roger S.

AU - Letaief, Khaled

PY - 1999

Y1 - 1999

N2 - In this paper, we propose sub-carrier allocation algorithms for a multiple access scheme in downlink OFDM transmission. Knowing the channel characteristics of all the users at the base station, the sub-carrier allocation algorithm assigns sub-carriers to the users in a way that the total transmit power is minimized. An optimal algorithm is presented to provide the hest sub-carrier assignment. The complexity of the optimal solution renders it impractical for real-time application. To deal with the frequently changing channel characteristic of a fast time-varying multipath fading channel, a heuristic algorithm based on constructive assignment and iterative improvement is proposed which can give out a valid solution In real time. Experimental results show that the performance of this real-time algorithm is close to that of the optimal allocation.

AB - In this paper, we propose sub-carrier allocation algorithms for a multiple access scheme in downlink OFDM transmission. Knowing the channel characteristics of all the users at the base station, the sub-carrier allocation algorithm assigns sub-carriers to the users in a way that the total transmit power is minimized. An optimal algorithm is presented to provide the hest sub-carrier assignment. The complexity of the optimal solution renders it impractical for real-time application. To deal with the frequently changing channel characteristic of a fast time-varying multipath fading channel, a heuristic algorithm based on constructive assignment and iterative improvement is proposed which can give out a valid solution In real time. Experimental results show that the performance of this real-time algorithm is close to that of the optimal allocation.

UR - http://www.scopus.com/inward/record.url?scp=79952127762&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952127762&partnerID=8YFLogxK

U2 - 10.1109/VETECF.1999.798611

DO - 10.1109/VETECF.1999.798611

M3 - Conference contribution

SN - 0780354354

SN - 9780780354357

VL - 50

SP - 1124

EP - 1128

BT - VTC 1999-Fall: IEEE VTS 50th Vehicular Technology Conference

ER -