一种平衡策略下网络多输入多输出系统的预编码方案

Equilibrium precoding scheme for network multiple-input multiple-output system

针对在多小区多输入多输出(MIMO)系统预处理中,最大化目标用户信干噪比与最小化干扰泄露之间存在的相互矛盾,提出一种基于平衡策略的预编码算法,构建预编码算法数学模型,引入干扰代价函数,并借助拉格朗日方程对所提算法的预编码向量进行求解,同时对算法的实现步骤进行了说明。最后在仿真中,对效用函数的收敛速度与迭代次数的关系进行了仿真,并基于系统最大和速率对该算法与现有算法的性能进行了比较,仿真结果验证了该算法在收敛速度与系统吞吐量方面的优越性能。

Maximizing the user＇s signal interference noise ratio and minimizing interference leakage is a contradiction in preprocessing for network Multiple-Input Multiple-Output （MIMO） system. Therefore, an equilibrium precoding algorithm based on equilibrium strategy was proposed. Mathematic model for precoding algorithm was constructed and interference pricing function was also introduced to obtain the precoding vector by Lagrange equation, Implementation procedure of the proposed algorithm was also summarized. Finally the proposed algorithm was compared with conventional algorithms and convergence of utility function was discussed by simulation. The results show that the proposed algorithm performs better than those existing schemes in convergence and throughput.