基于混合CSI的非均匀分布随机波束形成方案研究
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摘要
提出基于混合CSI的非均匀分布随机波束形成方案,通过设定阈值并不断选择匹配波束用户数最多的权重矢量作为发射权重矢量,使波束总是指向用户密度最大的区域,从而更好地利用了多用户系统所带来的分集效应,同时在最大化系统容量方面采用长期相关性CSI进行优化设计,不仅使系统大大减少了反馈量,也使方案在空间相关的广播衰落信道中更加实用有效。
In this paper,a non-uniform distribution random beamforming scheme based on hybrid CSI is proposed.It can make beams point to the area having the largest user density all the time by setting a threshold to select weight vectors that have the most effective users as transmitting weight vectors, which can achieve a better diversity gain brought by multi-user system.What's more, long-term CSI is adopted to maximize the capacity in this system, which saves mass precious feedback costs and makes this scheme more efficient in spatial correlating broadcast fading channels.
In this paper,a non-uniform distribution random beamforming scheme based on hybrid CSI is proposed.It can make beams point to the area having the largest user density all the time by setting a threshold to select weight vectors that have the most effective users as transmitting weight vectors, which can achieve a better diversity gain brought by multi-user system.What's more, long-term CSI is adopted to maximize the capacity in this system, which saves mass precious feedback costs and makes this scheme more efficient in spatial correlating broadcast fading channels.
引文
[1]Viswanath P,Tse D N C,Laroia R.Opportunistic beamforming using dumb antennas.IEEE Transactions on Information Theory,2002,48(6):1277-1294.
[2]Senst A,Schulz-Rittich P,Krause U et al.Random beamforming in correlated MISO channels for multiuser systems.IEEE International Conference on Communications,2004,5:2909-2913.
[3]Ko J Y,Lee Y H.Beamforming with hybird channel information in spatially correlated MISO channels.IEEE International Conference on Communications(ICC),Beijing,China,2008,5128-5132.
[4]李婧.MIMO系统中随机波束成形算法的研究[J].光通信研究,2008(5):64-66.
[5]林森.伪随机码加权的自适应多波束形成新方法[J].无线电通信技术,2015(1):35-37.
[6]郑芳.多用户系统的数字波束形成技术[D].重庆:重庆大学,2011.
[7]Yu W.Competition and cooperation in multiuser communication environments.[dissertation].Stanford University,2002.
[8]朱翠涛.吕兴茹.一种基于单调优化的多小区分布式波束成形算法[J].中国民族大学学报,2016(8):85-90.
[2]Senst A,Schulz-Rittich P,Krause U et al.Random beamforming in correlated MISO channels for multiuser systems.IEEE International Conference on Communications,2004,5:2909-2913.
[3]Ko J Y,Lee Y H.Beamforming with hybird channel information in spatially correlated MISO channels.IEEE International Conference on Communications(ICC),Beijing,China,2008,5128-5132.
[4]李婧.MIMO系统中随机波束成形算法的研究[J].光通信研究,2008(5):64-66.
[5]林森.伪随机码加权的自适应多波束形成新方法[J].无线电通信技术,2015(1):35-37.
[6]郑芳.多用户系统的数字波束形成技术[D].重庆:重庆大学,2011.
[7]Yu W.Competition and cooperation in multiuser communication environments.[dissertation].Stanford University,2002.
[8]朱翠涛.吕兴茹.一种基于单调优化的多小区分布式波束成形算法[J].中国民族大学学报,2016(8):85-90.