Multiobjective optimized subchannel allocation for wireless OFDM systems
13 September 2009
In this paper, we investigate the problem of dynamic subchannel assignments in the downlink of OFDM (Orthogonal Frequency Division Multiplexing) systems. The Kuhn-Munkres algorithm can provide the maximum weighted bipartite matching for assignment problems. In this paper, we formulate the multiobjective optimization (MO) problem in bipartite matching, and propose a modified bipartite matching algorithm(MBM) for assignments with MO requirements. This algorithm can be used to solve the weighted bipartite matching problem with multiobjective optimization. We illustrate the application of MBM to subchannel assignments in wireless OFDM systems. The simulation results show that MBM enjoys low computational complexity and maximizes the system capacity, while keeping the fairness among mobile users.