Title :
Guaranteed QoS in dynamic resource allocation with adaptive beamforming for multiuser multi-antenna OFDM systems
Author :
Xiaoxiao ; Zhu, Guangxi ; Hu, Zhenping ; Deng, Tianping
Author_Institution :
Dept. of Electron. & Inf. Eng., Huazhong Univ. of Sci. & Technol., China
Abstract :
In this paper, subcarrier and power allocation problems for multiuser multi-antenna OFDM systems are investigated. With the goal of minimizing the total transmit power required and guaranteeing each user´s QoS requirements, a low complexity dynamic resource allocation scheme is proposed. It involves adaptive subcarrier assignment, adaptive power control and beamforming. Mathematical analyses and numerical simulations show that the presented algorithm can exploit multiuser diversity to offer significant system-level performance improvement and guarantee different users´ QoS requirements effectively.
Keywords :
OFDM modulation; adaptive control; antenna arrays; array signal processing; diversity reception; numerical analysis; power control; quality of service; resource allocation; telecommunication control; OFDM systems; QoS; adaptive beamforming; adaptive power control; adaptive subcarrier assignment; dynamic resource allocation; multiuser diversity; multiuser multiantenna systems; power allocation; subcarrier allocation; Adaptive control; Array signal processing; Base stations; Bit error rate; Diversity reception; Downlink; OFDM; Power system modeling; Programmable control; Resource management;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9335-X
DOI :
10.1109/WCNM.2005.1544034
