Novel resource allocation algorithms for multiuser downlink MIMO-OFDMA of FuTURE B3G systems  

作　　者：Qiaoyun Sun Hui Tian Shuang Wang Kun Dong Ping Zhang 

机构地区：[1]Key Laboratory of Universal Wireless Communication, Ministry of Education, Wireless Technology Innovation Institute, Beijing University of Posts ＆ Telecommunications, Beijing 100876, China

出　　处：《Progress in Natural Science:Materials International》2009年第9期1141-1146,共6页自然科学进展·国际材料（英文版）

基　　金：supported by National High-Tech Program of China (Grant Nos. 2006AA01Z283 and2006AA01Z260);National Natural Science Foundation of China (Grant No. 60632030)

摘　　要：In this paper, subcarrier and power allocation problems for multiuser downlink MIMO-OFDMA of the FuTURE B3G TDD system are investigated. For the reciprocity of the TDD channel, the channel state information can be employed at the transmitter, thus eigen beamforming can be implemented efficiently. With the goal of minimizing the total transmit power under the condition that the QoS requirement of each user can be guaranteed, a novel dynamic resource allocation scheme is proposed to exploit the multiuser diversity gain. The proposed algorithm involves adaptive subcarrier allocation, adaptive modulation and eigen beamforming and achieves significant improvement in overall system performance. Based on the proposed scheme, a modified bit and power allocation is developed. The modified scheme reduces the computational complexity at little expense of system performance. Numerical simulations show that the proposed algorithm and the modified scheme can decrease the total transmit power effectively.In this paper, subcarrier and power allocation problems for multiuser downlink MIMO OFDMA of the FUTURE B3G TDD system are investigated. For the reciprocity of the TDD channel, the channel state information can be employed at the transmitter, thus eigen beamforming can be implemented efficiently. With the goal of minimizing the total transmit power under the condition that the QoS requirement of each user can be guaranteed, a novel dynamic resource allocation scheme is proposed to exploit the multiuser diversity gain. The proposed algorithm involves adaptive subcarrier allocation, adaptive modulation and eigen beamforming and achieves signif- icant improvement in overall system performance. Based on the proposed scheme, a modified bit and power allocation is developed. The modified scheme reduces the computational complexity at little expense of system performance. Numerical simulations show that the proposed algorithm and the modified scheme can decrease the total transmit power effectively.

关 键 词：Adaptive modulation and coding Dynamic resource allocation Eigen beamforming MIMO-OFDMA 

分 类 号：TN929.5[电子电信—通信与信息系统] TP338.8[电子电信—信息与通信工程]