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

作者：Sun Qiaoyun; Tian Hui^*; Wang Shuang; Dong Kun; Zhang Ping

来源：Progress in Natural Science, 2009, 19(9): 1141-1146.

DOI：10.1016/j.pnsc.2009.01.002

• Adaptive modulation and coding
• Dynamic resource allocation
• Eigen beamforming
• MIMO-OFDMA

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.

• 出版日期2009-9-10
• 单位北京邮电大学