Title :
User Resource Structure Design with Enhanced Diversity for OFDMA in Time-Varying Channels
Author :
Minn, Hlaing ; Chong, Chia-Chin
Author_Institution :
Univ. of Texas at Dallas, Richardson, TX
Abstract :
It is a significant challenge to support high data rate services at high mobile speeds. In this paper, an efficient diversity-exploiting user resource structure, namely evolving- type resource structure, for fast time-varying frequency-selective fading channel environments is designed. This newly proposed resource structure enjoys the advantages of both band-type and interleaved-type structures and avoids their disadvantages by exploiting both the multiuser diversity and the frequency diversity under fast time-varying channels. Simulation results corroborate the performance improvement of the new resource structure over the existing ones under various mobility scenarios.
Keywords :
OFDM modulation; diversity reception; fading channels; mobile radio; multiuser channels; resource allocation; time-varying channels; OFDMA; band-type structures; evolving-type resource structure; fast time-varying channel; frequency-selective fading channel environment; high-data rate services; interleaved-type structures; mobile radio; multiuser diversity; user resource structure design; Communications Society; Cultural differences; Diversity methods; Frequency diversity; Laboratories; Mobile communication; Performance gain; Resource management; Time-varying channels; USA Councils;
Conference_Titel :
Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE
Conference_Location :
Budapest
Print_ISBN :
978-1-4244-2947-9
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2009.4918014
