WiMAX subchannelization modes: performance analysis and spectrum efficiency enhancement

Authors:
Mohamed Melki;Soumaya Hamouda;Sidi Ould Mohamed;Sami Tabbane
Affiliations:
Communication Engineering School, Sup'Com, Tunis, Tunisia;Communication Engineering School, Sup'Com, Tunis, Tunisia;Communication Engineering School, Sup'Com, Tunis, Tunisia;Communication Engineering School, Sup'Com, Tunis, Tunisia
Venue:
GIIS'09 Proceedings of the Second international conference on Global Information Infrastructure Symposium
Year:
2009

Citing 3
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Abstract

In this paper, both distributed and adjacent subchannelization modes for WiMAX system based on IEEE 802.16d standard are investigated. Sensitivity to the co-channel interference is evaluated for each mode in downlink communications. We provide a comparative analysis in terms of spectrum efficiency and present a new scheme to enhance the system performance. Our solution proposes a joint deployment of the distributed subchannelization modes using the benefits of each mode. In case of adjacent subchannelization mode, a water-filling algorithm is suggested to increase the spectral efficiency of the system. Snapshots-based simulations show that our scheme can significantly improve the spectral efficiency as compared to common usage of these subchannelization modes.