计算机技术与发展2017，Vol.27Issue(4)：108-112,5.DOI:10.3969/j.issn.1673-629X.2017.04.024
基于联合QR分解的干扰对齐算法
Interference Alignment Algorithm Based on Joint QR Decomposition
摘要
Abstract
With the increasing scarcity of spectrum resource,the full frequency reusing technique has been taken more seriously.However,the inter-cell and intra-cell interference become the bottleneck of the system capacity in that scenario.System capacity can be sharply improved with the interference management scheme named distributed iteration interference alignment,meanwhile,with the drawback of high complexity.For three cells and two users in each cell MIMO broadcast interference channel,a linear interference alignment algorithm is proposed that can align the inter-cell and intra-cell interference.According to the characteristics of the equivalent channel model based on the QR decomposition of the joint channel matrix,each user can achieve Degree of Freedom (DoF) that is one-third of the channel space dimension with minimizing the interference leakage and zero-forcing.Moreover,just one pre-coding is processed in the receiver which can greatly reduce the complexity.The simulation results show that compared to the distributed iteration interference alignment algorithm with the same DoF for each user,the proposed algorithm can significantly decrease the complexity and guarantee system performance,even better in lower DoF situation.关键词
干扰对齐/小区间干扰/小区内干扰/QR分解/自由度Key words
interference alignment/inter-cell interference/intra-cell interference/QR decomposition/degree of freedom分类
信息技术与安全科学引用本文复制引用
纪辉,董恒..基于联合QR分解的干扰对齐算法[J].计算机技术与发展,2017,27(4):108-112,5.基金项目
国家自然科学基金资助项目(61471202,61271234) （61471202,61271234）
