频率选择性高斯干扰信道中的时频联合干扰对齐方案  

Joint time-frequency interference alignment in the frequency-selective Gaussian interference channel

作　　者：景振海[1,2] 白宝明[1] 马啸[3] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071 [2]中国电子科技集团公司第36研究所,浙江嘉兴314000 [3]中山大学信息科学与技术学院,广东广州510275

出　　处：《通信学报》2011年第9期161-166,173,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(60972046;U0635003);国家科技重大专项基金资助项目(2009ZX03003-011;2010ZX03003-003)~~

摘　　要：为了弥补传统干扰对齐方案只在一维域上对齐的不足,提出了一种时频联合干扰对齐方案。通过把频率选择性高斯干扰信道分割成多个并行的高斯干扰信道后引入时频联合干扰对齐矩阵,对这些并行信道在时域和频域同时进行干扰对齐。基于最优化方法,提出了一种计算时频联合干扰对齐矩阵的算法。数值仿真表明该方案和传统干扰对齐方案获得相同性能的条件下,能大幅度地缩短译码延时或减少频带资源的使用,所提方案是传统一维域算法在二维域的扩展,能够提供更加灵活的时频资源分配手段。To make up for the limitation that the traditional interference alignment can only align the signal in one dimensional domain,a novel joint time-frequency interference alignment scheme was put forward in the frequency-selective Gaussian interference channel（GIC）.After the frequency-selective GIC was changed into a set of parallel GICs,a set of time-frequency alignment matrices were employed which aligned the interference signal not only in time domain but also in frequency domain.An algorithm for calculating the time-frequency alignment matrices was presented based on the convex optimization.Computer simulations show that the joint time-frequency interference alignment can obtain the same performance as the traditional interference alignment while the joint time-frequency interference alignment can shorten the decoding time or reduce the occupation of the frequency resource.The joint time-frequency interference alignment scheme is an extension of the traditional interference alignment and provides a more flexible resource allocation approach between time domain and frequency domain.

关 键 词：干扰信道 干扰对齐 最优化方法 自由度 

分 类 号：TN911.2[电子电信—通信与信息系统]