A 2-D Subcarrier Allocation Scheme for Capacity Enhancement in a Clustered OFDM System

Youngok KIM
Jaekwon KIM

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B    No.7    pp.1880-1883
Publication Date: 2007/07/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.7.1880
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
OFDM,  subcarrier allocation,  capacity,  complexity,  

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Summary: 
An adaptive subcarrier allocation (SA) algorithm is proposed for both the enhancement of system capacity and the practical implementation in a clustered OFDM system. The proposed algorithm is based on the two dimensional comparison of the channel gain in both rows and columns of the channel matrix to achieve higher system capacity. Simulation results demonstrate that the proposed algorithm outperforms the SA algorithm based on only one dimensional comparison in terms of system capacity, and furthermore, it performs as well as the optimal SA algorithm at relatively low computational cost.