相关天线下基于波束成型多用户MIMO-OFDM系统子载波分配研究

Subcarrier allocation algorithm of multiuser MIMO-OFDM systems with beamforming in correlated antennas

针对波束成型多用户MIMO-OFDM系统,以优化系统性能为目标,给出一种在天线具有相关性条件下基于部分信道状态信息的子载波分配算法.该算法采用克罗内克(Kronecker)模型作为相关天线的信道模型,并用信道状态统计信息来描述该模型的传递过程,从而得到相应的子载波分配原则.实验结果表明:系统性能不仅与收发两端的天线数量有关,也与天线相关矩阵中的相关系数以及延时反馈参数有关.

A subcarrier allocation algorithm based on partial channel state information under the condition of correlated antennas was explored to optimize the performance for the muhiuser MIMO-OFDM system with beamforming. The kronecker model was used as the correlated channel model, and the statistical channel state information was utilized to describe the transmitting process, then the corresponding subcarrier allocation criteria could be acquired. The experimental results showed that the system performance not only related to the number of antennas of base station （BS） and subscribed unit （SU）, but also related to the correlation coefficients of antenna correlation matrix and the parameters of delayed feedback.