Title :
WiMAX subchannelization modes: Performance analysis and spectrum efficiency enhancement
Author :
Melki, Mohamed ; Hamouda, Soumaya ; Mohamed, Sidi Ould ; Tabbane, Sami
Author_Institution :
Res. Unit MEDIATRON, Commun. Eng. Sch. (Sup´´Com), Tunis, Tunisia
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.
Keywords :
WiMax; channel allocation; cochannel interference; telecommunication standards; IEEE 802.16d standard; WiMAX subchannelization modes; cochannel interference; downlink communications; performance analysis; spectrum efficiency enhancement; water-filling algorithm; Bandwidth; Communication standards; Downlink; Fading; Interchannel interference; Media Access Protocol; Performance analysis; System performance; Throughput; WiMAX; AMC; FUSC; IEEE 802.16d; OFDMA; PUSC; WiMAX; water filling;
Conference_Titel :
Information Infrastructure Symposium, 2009. GIIS '09. Global
Conference_Location :
Hammemet
Print_ISBN :
978-1-4244-4623-0
Electronic_ISBN :
978-1-4244-4624-7
DOI :
10.1109/GIIS.2009.5307062
