Improved Subcarrier Allocation in Multi-User OFDM Systems
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概要
- 論文の詳細を見る
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.
- (社)電子情報通信学会の論文
- 2008-12-01
著者
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Lee Won
Dept. Of Chem. Eng. Sogang University
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LEE Jaeyoon
Hanyang University
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PARK Sang
Hanyang University
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Park Sang
Hanyang Univ. Seoul Kor
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LEE Jaeyoon
Dept. of Electronics and Computer Engineering, Hanyang University
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YOON Dongweon
Dept. of Electronics and Computer Engineering, Hanyang University
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Lee Jaeyoon
Dept. Of Electronics And Computer Engineering Hanyang University
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Yoon Dongweon
Hanyang Univ. Seoul Kor
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Yoon Dongweon
Dept. Of Electronics And Computer Engineering Hanyang University
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PARK Sang
Dept. of Electronics and Computer Engineering, Hanyang University
-
Park Sang
Dept. Of Electronics And Computer Engineering Hanyang University
-
Lee Won
Hanyang Univ. Seoul Kor
-
Yoon Dongweon
Dept. Of Electronics And Communications Engineering Hanyang University
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