多小区多用户无线网络下行链路协同波束成形设计

Coordinated beamforming design in downlink multi-cell multi-user wireless networks

在频率复用的多小区多用户无线网络中,为了获得较好的和速率性能,研究了降低同频干扰的协同波束成形设计问题。博弈论分析结果表明,性能最优的协同波束成形矢量是自私和利他策略的线性组合。提出了一种最大化和速率的波束成形矢量迭代算法,给出了基于信道状态统计量的组合系数的估计方法。最后,仿真评估了波束成形算法的性能,表明了所提迭代算法的收敛性。

To obtain the good sum-rate performance in multi-cell multi-user wireless networks with frequency reuse, co- ordinated beamforming design problem of co-channel interference mitigation was studied. Theoretical analysis results with the game theory show that, the collaborative beamforming vector of the optimal performance is a linear combination of selfishness and altruism strategy. A beamforming vector iteration algorithm to maximize sum-rate was presented, and estimation method about composite coefficient based on the statistic of channel state information was proposed. Finally, the results of simulation assess the performance of the algorithm and show convergence of the proposed algorithm.