Low complexity resource allocation algorithm by multiple attribute weighing and user ranking for OFDMA systems

Maduranga Liyanage, Iwao Sasase

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

In this paper, we propose an effective subcarrier allocation scheme for multiuser orthogonal frequency division multiple access (OFDMA) system in the downlink transmission with low computational complexity. In the proposed scheme, by taking multiple attributes of a user channel, such as carrier gain decrease rate and variation from the mean channel gain of the system, to determine a rank for the user, subcarriers are then allocated depending on the individual users' rank. Different channel characteristics are used to better understand a users' need to subcarriers and hence determine a priority to user. We also adopt an attribute weighing scheme to enhance the performance of the proposed scheme. The scheme is efficiently computational, by avoiding using iterations for the algorithm convergence and also common water-filling calculations which might become complex with increasing system parameters. Low complexity is achieved by allocating subcarriers to users depending on their determined rank. Our proposed scheme is simulated in comparison with other mathematically efficient subcarrier allocation schemes as well as with a conventional greedy allocation scheme. It is shown that proposed method demonstrates better results than the simulated schemes.

本文言語English
ホスト出版物のタイトルHUT-ICCE 2006 1st International Conference on Communications and Electronics, Proceedings
ページ213-218
ページ数6
DOI
出版ステータスPublished - 2006 12 1
イベントHUT-ICCE 2006 1st International Conference on Communications and Electronics - Hanoi, Viet Nam
継続期間: 2006 10 102006 10 11

出版物シリーズ

名前HUT-ICCE 2006 First International Conference on Communications and Electronics, Proceedings
PART 1

Other

OtherHUT-ICCE 2006 1st International Conference on Communications and Electronics
国/地域Viet Nam
CityHanoi
Period06/10/1006/10/11

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学

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