双层异构网络下多用户干扰对齐算法  

Multiple-users interference alignment base on two-tired heterogeneous networks

作　　者：杨敬文[1] 李莉[1] 邱昊[1] 

机构地区：[1]上海师范大学信息与机电工程学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2016年第2期150-154,共5页Journal of Shanghai Normal University(Natural Sciences)

基　　金：国家自然科学基金项目(61503251)

摘　　要：针对多个毫微微蜂窝网络与宏蜂窝网络共存的网络环境,基于干扰对齐技术,提出了一种双层预编码方案,首先定义宏蜂窝网络对毫微微蜂窝网络造成的干扰为跨层干扰,毫微微蜂窝网络之间的干扰为同层干扰,分别对毫微微蜂窝用户和宏蜂窝用户进行预编码,宏蜂窝用户的预编码使得跨层干扰最小,使之可比拟于背景噪声,毫微微蜂窝用户的预编码与毫微微蜂窝基站的后置编码进行迭代,以最小均方误差（MMSE）准则输出,仿真结果表明所提算法使得毫微微蜂窝网络的吞吐量相较于单层MMSE算法在信噪比为0～30 d B区间内平均提高了3 bps/Hz.Interference alignment is a novel interference alignment way,which is popular in interference management of two-tiered heterogeneous networks. Based Interference alignment technique,a two level precoding scheme has been presented to solve the interference in the case of muti-femtocell network coexist with macrocell network. First we define co-layer interference as the interference between femtocell and femtocell,correspondingly,we define cross-layer interference as the interference between macrocell and femtocell,and use precoders at macrocell users and femtocell users respectively. The precoders of macrocell users minimize the cross-layer interference,and output of iteration between precoders of femtocell users and post code of base station bases on mean square error minimization algorithm,which would be used to handle co-layer interference,thus it will reduce interference of femtocell at last and ensure the Qo S of femtocell users.

关 键 词：干扰对齐 双层异构网络 毫微微蜂窝 最小均方误差 

分 类 号：TN929.5[电子电信—通信与信息系统]