虚拟小区干扰均衡的波束形成算法

Beamforming for virtual cell with balanced interference

针对下一代无线通信系统(5G)超密网络场景中复杂的干扰问题,给出了以用户为中心的虚拟小区波束形成算法。采用利己利他的波束形成算法,对迫零算法进行利他松弛,以及系统效用拉格朗日函数最大化求解,得到波束形成矢量矩阵,实现了小区内部和小区之间干扰的动态平衡。通过与单纯利己或利他算法的仿真比较,结果表明利己利他波束形成算法可以提高系统吞吐量,获得更大的系统和速率。

Aiming at alleviating the interference which is much complex in the ultra-dense network scenario of next generation communication system（5G）,user centric virtual beamforming is used to suppress the inter-cell interference effect.To obtain the virtual beamforming vector with an egoistic and altruistic strategy in nature,the Zero Forcing algorithm is relaxed andsystem utility isoptimized with maximizing the Lagrange function of sum-rate respectively.By comparing with algorithm with pure egoistic or altruistic strategy,the results show that the egoistic and altruistic beamforming can get the best balance for eliminating both the inter and intro interference between virtual cells,resulting in improved system sum-rateperformance.