基于最大化信干噪比的广播信道干扰消除算法

An interference mitigation algorithm for broadcast channels based on Max-SINR

研究了广播信道分布式干扰消除算法的性能,提出了一种基于动态功率分配的多天线广播干扰信道对齐算法。该算法利用多用户多天线干扰信道相关矩阵的迹来计算分配功率,并采用最大化码流信干噪比的方法来得到预编码矩阵和接收滤波器矩阵。数值仿真表明,该动态功率分配算法与等功率分配算法相比,尽管低负荷下干扰对齐后的平均信干噪比增益不明显,但中、高负荷下其干扰对齐后的平均信干噪比大幅提高,特别是高负荷下可以解决等功率方法存在的信干噪比瓶颈效应。由于低负荷的应用需求并不强烈,因而该算法是一种实用的广播信道干扰消除方法。

The performance of distributed interference mitigation algorithms for broadcast channels was studied, and a new interference mitigation algorithm based on dynamic power allocation for multi-user multi-antenna broadcast channels was proposed. The new algorithm uses the trace of the channel correlation matrix to calculate the power allocation, and uses the method of maximizing the signal interference noise ratio （SINR） to obtain the precoding ma- trix and the receiving filter matrix. The numerical simulation showed that the proposed dynamic power allocation al- gorithm outperformed the equal power allocation algorithm in medium/high load scenario, and solved the bottleneck effect; the proposed algorithm gave no obvious gain compared to the prior art in low load scenario. However, the needs for low load application are not strong, the proposed scheme is a practical method for channel interference mitigation.