通信学报2018，Vol.39Issue(1)：137-146,10.DOI:10.11959/j.issn.1000-436x.2018017
基于分布式空时干扰对齐的MIMO干扰信道自由度研究
Degrees of freedom of MIMO interference channel with distributed space-time interference alignment
摘要
Abstract
In the context of K-user MIMO interference channel (IC),achievable degrees of freedom (DoF) were investigated with distributed space-time interference alignment (DSTIA).By precoding with distributed current and outdated channel state information at the transmitters (CSIT),new tradeoff regions between achievable DoF and CSI feedback delay/frequency were achieved for MISO system.The impact of the number of transmit antennas on achievable DoF in the MISO system was analyzed,revealing that DoF results approach to the outer bound as the number of transmit antennas increases.Further,the impact of the number of receive antennas on achievable DoF was characterized,deriving the range of CSI feedback delay that preserves achievable DoF in the MIMO system.Theoretical and numerical analyses show that,the proposed DSTIA scheme can achieve better sum-DoFs by eliminating inter-user interference perfectly,tighten the gap between achievable DoF and outer bound,as well as improve the achievable rate of the system.关键词
自由度/分布式空时干扰对齐/MIMO干扰信道/CSI有限反馈Key words
degree of freedom/distributed space-time interference alignment/MIMO interference channel/limited CSI feedback分类
信息技术与安全科学引用本文复制引用
应腾达,冯文江,蒋卫恒,刘国岭,姚楚楠,包涛涛..基于分布式空时干扰对齐的MIMO干扰信道自由度研究[J].通信学报,2018,39(1):137-146,10.基金项目
中央高校基本科研业务费基金资助项目(No.106112016CDJXY500002) （No.106112016CDJXY500002）
重庆市基础科学与前沿技术研究重点基金资助项目(No.cstc2017jcyjBX0047,No.cstc2015jcyjA40021)The Fundamental Research Funds for the Central Universities (No.106112016CDJXY500002),The Key Project of Chongqing Basic Science and Advanced Technology Research (No.cstc2017jcyjBX0047,No.cstc2015jcyjA40021) （No.cstc2017jcyjBX0047,No.cstc2015jcyjA40021）
