Coordinated Beamforming user scheduling based on Differential Evolution

In Coordinated Beamforming system, user scheduling should take all users in coordinated cells into account, and optimal user set could be selected based on the traditional scheduling criterions. As the large amount of active users in coordinated cells, the exhaustive search is too complex to accomplish. As a result, user scheduling is done in each cell in real system. However, user scheduling in each cell could not make the most of multi-user gain. A modified proportional fairness algorithm based on Differential Evolution is studied here, which considers all the active users. The algorithm selects the optimal user set based on proportional fairness factor by Differential Evolution algorithm with its excellent optimizing performance. Simulation result shows that the algorithm could achieve favorable system performance in sum rate and user fairness.