基于MIMO-D2D异构网络的干扰抑制算法  

Interference suppression algorithm based on MIMO-D2D heterogeneous networks

作　　者：薛建彬[1,2] 梁艳慧 Xue Jianbin;Liang Yanhui(School of Computer and Communication, Lanzhou University of Technology, Lanzhou 730050, China;National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China)

机构地区：[1]兰州理工大学计算机与通信学院,甘肃兰州730050 [2]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《华中科技大学学报（自然科学版）》2017年第12期66-72,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61461026);东南大学移动通信国家重点实验室开放研究基金资助项目(2014D13)

摘　　要：将多输入多输出(MIMO)技术引入到蜂窝用户和端到端(D2D)用户构成的异构网络中,提出了一种基于最大信干噪比因子的资源分配算法,实现了多个D2D用户复用一个蜂窝用户的下行资源.在此基础上联合最大信漏噪比(SLNR)的预编码算法,在基站到蜂窝用户信号功率最大化的同时,降低了泄漏到D2D用户组的功率,大幅减少了用户之间的同频干扰.结果表明:当平均信噪比为35dB时,相比于单天线异构网络,基于联合干扰抑制算法的MIMO(4×2)异构网络容量可增大12.33bps/Hz;而针对多个用户复用一个资源提出的最大SLNR的预编码算法相比于最小均方误差(MMSE)和块对角化(BD)算法,容量最多可增大36.2%;并且无论是在高信噪比还是低信噪比下,所提出的联合算法均能使系统性能得到明显的增益.In the heterogeneous networks composed of cellular users and D2D （device-to-device）users where MIMO（multiple input multiple output）technology was introduced,a resource allocation algorithm based on signal to noise ratio factor was proposed that downlink resource of one cellular user was reused by more than one D2D user.And on this basis,aprecoding algorithm based on maximized signal to leakage and noise ratio（SLNR）was proposed,which reduced the power leaking to the D2D user group while maximizing the power of the base station to the cellular user,greatly reducing the interference between users.The results show that compared with the traditional single antenna heterogeneous networks,the capacity underlaying MIMO（4×2）heterogeneous networks increases by12.33 bps/Hz under the joint interference suppression algorithm with the 35 dB signal noise ratio.And aiming at the situation where multiple users reuse one resource,the proposed precoding algorithm based on maximized SLNR can increase the capacity by up to 36.2% compared to minimum mean squared error（MMSE）and block diagonalization（BD）algorithms.And in the case of high signal to noise ratio and low signal to noise ratio,the proposed joint algorithm makes the system performance obtain significant gains.

关 键 词：异构网络 多输入多输出 资源分配 预编码 干扰抑制 

分 类 号：TN929.5[电子电信—通信与信息系统]