The Influence of Subchannel Diversity on the Performance of OFDMA Systems Based on IEEE 802.16

The performance of a mobile radio system based on OFDMA is determined by the type of mapping of logical subchannels, which are allocated for data transmissions, onto the frequency channel. The mapping scheme affects the diversity both within and between the OFDMA subchannels. This paper provides a performance comparison of different subchannel mappings from MAC point of view by means of stochastic event- driven simulations. The tradeoff between the effects of mapping subchannels onto distributed and adjacent subcarrier sets are investigated in detail. The effects are robust SNR estimation and possible throughput gains due to frequency adaptive scheduling, respectively.

[1]  Hassan Yaghoobi,et al.  Scalable OFDMA Physical Layer in IEEE 802.16 WirelessMAN , 2004 .

[2]  W. C. Jakes,et al.  Microwave Mobile Communications , 1974 .

[3]  B. Sklar,et al.  Rayleigh fading channels in mobile digital communication systems Part I: Characterization , 1997, IEEE Commun. Mag..

[4]  Bernhard Walke,et al.  MAC Level Performance Comparison of Distributed and Adjacent OFDMA Subchannels , .

[5]  John M. Cioffi,et al.  Increase in capacity of multiuser OFDM system using dynamic subchannel allocation , 2000, VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026).

[6]  Stefan Parkvall,et al.  Technical solutions for the 3G long-term evolution , 2006, IEEE Communications Magazine.

[7]  Patrick A. Hosein.  On the Optimal Allocation of Downlink Resources in OFDM-Based Wireless Networks , 2006, WWIC.

[8]  Patrick Hosein,et al.  Quantifying the Diversity of OFDMA Subchannels , 2007, 2007 IEEE Wireless Communications and Networking Conference.

[9]  John G. Proakis,et al.  Digital Communications , 1983 .

[10]  Abbas Jamalipour,et al.  Wireless communications , 2005, GLOBECOM '05. IEEE Global Telecommunications Conference, 2005..

[11]  Angeliki Alexiou,et al.  Link performance models for system level simulations of broadband radio access systems , 2005, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications.

[12]  Andrea Goldsmith,et al.  Wireless Communications , 2005, 2021 15th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS).

[13]  V. Roman,et al.  Broadband wireless access solutions based on OFDM access in IEEE 802.16 , 2002 .