接收矢量估计辅助的协调波束赋形算法

Coordinated beamforming algorithm assisted by receive beamforming vector estimation

针对下行蜂窝无线通信系统,提出了一种基于接收矢量估计辅助优化的分布式协调波束赋形方案。该方案通过在发射端间共享少量信息,并基于MVDR准则对接收端的接收矢量进行估计,从而优化发送波束赋形矢量设计。仿真结果和分析表明,该分布式方案能以较低的开销和算法复杂度获得接近于集中式方案的性能。此外,还提出了一种简化方案,该方案可进一步降低系统开销。

A distributed coordinated beamforming optimization scheme with the assistance of receive beamformer esti- mation was proposed for downlink cellular wireless communication systems. By sharing a small amount of information among cooperated base stations（BSs）, the proposed algorithm estimates the receive vectors of related users at the BSs based on MVDR criterion, which are then utilized to optimize the design of transmit beamforming vectors. The simula- tion results and analysis show that the proposed distributed scheme can achieve the performance close to that in the cen- tralized scheme with lower overhead and complexity. In addition, a simplified scheme was also proposed which further reduces the system overhead.