Dynamic resource allocation for downlink multi-user MIMO-OFDMA/SDMA systems

Authors:
Chongxian Zhong;Chunguo Li;Rui Zhao;Luxi Yang;Xiqi Gao
Affiliations:
School of Information Science and Engineering, Southeast University, Nanjing, China;School of Information Science and Engineering, Southeast University, Nanjing, China;School of Information Science and Engineering, Southeast University, Nanjing, China;School of Information Science and Engineering, Southeast University, Nanjing, China;National Mobile Communications Research Lab., Southeast University, Nanjing, China
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

Citing 4
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Abstract

In this paper, new dynamic resource allocation algorithms are presented for the downlink of multi-user MIMO-OFDMA/SDMA systems. Since it is difficult to obtain the optimal solution to the joint optimization problem, the whole procedure is divided into two steps, namely, the subcarrier-user scheduling and the resource allocation. In the first step, a new metric is proposed to measure the spatial compatibility of multiple users each with multiple receive antennas, based on which a new subcarrier-user scheduling algorithm is designed. In the second step, two dynamic resource allocation algorithms are developed to assign radio resources to the scheduled users accordingly. Simulation results demonstrate the superiority of the proposed algorithms in terms of the system throughput.