基于级联预编码的蜂窝下行机会干扰对齐

摘要

Aiming at MIMO cellular interfering broadcast channel,using the cascaded precoding and random beam-forming that based on interference alignment user scheduling rules,this paper proposed an opportunist interference alignment algorithm.The cascaded precoding could respectively process the interference that comes from intra-cell and inter-cell in the downlink network between base station and the chosen user.Meanwhile the proposed method significantly outperformed the classic random beam-forming in terms of sum capacity of system and average energy efficiency.The simulation results verify the effectiveness of the proposed method.%针对多天线蜂窝网络下行干扰信道,利用级联预编码思想和以干扰对齐为用户调度准则的随机波束赋形方法,提出了一种机会式干扰对齐算法.在基站与被选中用户的下行链路中,双层预编码的设计可以同时处理小区内和小区间干扰.与普通的随机波束赋形算法相比,方法使得系统具有更大和容量且有更高的能量效率,仿真验证了算法的优越性.