蜂窝D2D异构网络非对称干扰对齐算法

Asymmetric Interference Alignment for Device-to-Device Underlaying Cellular Networks

针对蜂窝D2D异构网络中蜂窝通信与D2D用户间的相互干扰问题,提出了一种基于分组的干扰对齐算法,通过对D2D用户进行分组,将蜂窝通信基站对D2D通信用户的干扰对齐到相同的信号空间,并根据蜂窝通信和D2D通信对传输速率的不同需求,设计相应的预编码矩阵和接收滤波矩阵,消除用户间干扰对通信的影响。仿真实验表明,在有限的天线配置条件下,提出的干扰对齐算法,能够满足蜂窝D2D异构网络中对系统传输容量的不同需求,具有良好的应用价值。

Aiming at the problem of mutual interference between cellular communication and D2D users in underlaying cellular networks, a novel group-based interference alignment scheme is proposed. By grouping D2D users, the interference from the cellular communication base station to D2D communication users is aligned to the same signal space. The corresponding pre-coding matrix and the receiver filter ma- trix are designed to eliminate the interference according to the different requirements of the transmission rate. The simulation results show that the proposed interference alignment algorithm can meet the different requirements of the transmission capacity of the underlaying cellular networks with limited antenna config- uration, and have important theoretical and practical significance.