Improved Subcarrier Allocation in Multi-User OFDM Systems
Summary :
In a multi-user orthogonal frequency division multiplexing (OFDM) system, efficient resource allocation is required to provide service to more users. In this letter, we propose an improved subcarrier allocation algorithm that can increase the spectral efficiency and the number of total transmission bits even if the number of users is too large. The proposed algorithm is divided into two stages. In the first stage, a group of users who are eligible for services is determined by using the bit error rate (BER), the users' minimum data rate requirement, and channel information. In the second stage, subcarriers are first allocated to the users on the basis of channel state, and then the reallocation is performed so that resource waste is minimized. We show that the proposed algorithm outperforms the conventional one on the basis of outage probability, spectral efficiency, and the number of total transmission bits through a computer simulation.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E91-B No.12 pp.4030-4033
- Publication Date
- 2008/12/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1093/ietcom/e91-b.12.4030
- Type of Manuscript
- LETTER
- Category
- Wireless Communication Technologies
Authors
Keyword
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Won Joon LEE, Jaeyoon LEE, Dongweon YOON, Sang Kyu PARK, "Improved Subcarrier Allocation in Multi-User OFDM Systems" in IEICE TRANSACTIONS on Communications,
vol. E91-B, no. 12, pp. 4030-4033, December 2008, doi: 10.1093/ietcom/e91-b.12.4030.
Abstract: In a multi-user orthogonal frequency division multiplexing (OFDM) system, efficient resource allocation is required to provide service to more users. In this letter, we propose an improved subcarrier allocation algorithm that can increase the spectral efficiency and the number of total transmission bits even if the number of users is too large. The proposed algorithm is divided into two stages. In the first stage, a group of users who are eligible for services is determined by using the bit error rate (BER), the users' minimum data rate requirement, and channel information. In the second stage, subcarriers are first allocated to the users on the basis of channel state, and then the reallocation is performed so that resource waste is minimized. We show that the proposed algorithm outperforms the conventional one on the basis of outage probability, spectral efficiency, and the number of total transmission bits through a computer simulation.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e91-b.12.4030/_p
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@ARTICLE{e91-b_12_4030,
author={Won Joon LEE, Jaeyoon LEE, Dongweon YOON, Sang Kyu PARK, },
journal={IEICE TRANSACTIONS on Communications},
title={Improved Subcarrier Allocation in Multi-User OFDM Systems},
year={2008},
volume={E91-B},
number={12},
pages={4030-4033},
abstract={In a multi-user orthogonal frequency division multiplexing (OFDM) system, efficient resource allocation is required to provide service to more users. In this letter, we propose an improved subcarrier allocation algorithm that can increase the spectral efficiency and the number of total transmission bits even if the number of users is too large. The proposed algorithm is divided into two stages. In the first stage, a group of users who are eligible for services is determined by using the bit error rate (BER), the users' minimum data rate requirement, and channel information. In the second stage, subcarriers are first allocated to the users on the basis of channel state, and then the reallocation is performed so that resource waste is minimized. We show that the proposed algorithm outperforms the conventional one on the basis of outage probability, spectral efficiency, and the number of total transmission bits through a computer simulation.},
keywords={},
doi={10.1093/ietcom/e91-b.12.4030},
ISSN={1745-1345},
month={December},}
Copy
TY - JOUR
TI - Improved Subcarrier Allocation in Multi-User OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 4030
EP - 4033
AU - Won Joon LEE
AU - Jaeyoon LEE
AU - Dongweon YOON
AU - Sang Kyu PARK
PY - 2008
DO - 10.1093/ietcom/e91-b.12.4030
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E91-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 2008
AB - In a multi-user orthogonal frequency division multiplexing (OFDM) system, efficient resource allocation is required to provide service to more users. In this letter, we propose an improved subcarrier allocation algorithm that can increase the spectral efficiency and the number of total transmission bits even if the number of users is too large. The proposed algorithm is divided into two stages. In the first stage, a group of users who are eligible for services is determined by using the bit error rate (BER), the users' minimum data rate requirement, and channel information. In the second stage, subcarriers are first allocated to the users on the basis of channel state, and then the reallocation is performed so that resource waste is minimized. We show that the proposed algorithm outperforms the conventional one on the basis of outage probability, spectral efficiency, and the number of total transmission bits through a computer simulation.
ER -
English
