干扰泄漏最小的多小区MIMO干扰对齐算法

Multicell MIMO Interference Alignment Algorithm Based on Minimum Interference Leakage

在3小区多输入多输出(MIMO)干扰对齐通信系统中,提出一种基于系统总干扰泄漏最小的预编码矩阵组的选择算法.首先求出系统中所有变换矩阵,并基于干扰泄漏最小准则从中寻找出最优的变换矩阵;再依据干扰对齐的最大自由度选出一半的特征向量组成预编码矩阵.仿真结果表明:与现有干扰对齐预编码矩阵的设计方案相比,文中提出的算法在系统和速率性能上有明显的改善,而且该算法在统计信道状态信息下同样具有优势.

In 3-cell MIMO（multiple-input multiple-output） interference alignment communication systems, a precoding matrix group selection algorithm based on the minimum total system interference leakage was proposed. We first calculate all the transformation matrices in the system, and select the optimal transformation matrix according to the criteria of the minimum interference leakage. Then we select half of the eigenvectors from the set of eigenvectors of transformation matrix to constitute the precoding matrix according to the criteria of the maximum degrees of freedom. Simulation results show that, compared to the existing interference alignment precoding matrix design scheme, the proposed algorithm has great advantage in terms of the system sum-rate performance, and also has advantage with the statistical channel state information.