@inproceedings{24e8418fff0e430388dd0904c9bbd8e5,
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 Letaief, \{K. B.\}",
year = "1999",
doi = "10.1109/VETECF.1999.798611",
language = "English",
isbn = "0780354354",
series = "IEEE Vehicular Technology Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2",
pages = "1124--1128",
booktitle = "VTC 1999-Fall",
edition = "2",
}