Degrees of Freedom of the MIMO Z-Interference Channel With Delayed CSIT

被引：9
|
作者：
Mohanty, Kaniska [1 ]
Varanasi, Mahesh K. [1 ]
机构：
[1] Univ Colorado, Dept Elect Comp & Energy Engn, Boulder, CO 80309 USA
来源：
IEEE COMMUNICATIONS LETTERS | 2015年 / 19卷 / 12期
基金：
美国国家科学基金会;
关键词：
Channel state information; degrees of freedom; interference channel; MIMO;
D O I：
10.1109/LCOMM.2015.2483584
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
The degrees of freedom region is established for the 2-user multiple-inputmultiple-output Z-interference channel with an arbitrary number of antennas at each node, under the assumption of delayed channel state information at the transmitters. A new interference alignment scheme is obtained and is shown to be optimal in the degrees of freedom (DoF) metric. When used over an interference channel with one cross-link being statistically weaker than the other three links, this scheme, by explicitly recognizing the relative weakness of that link, can lead to a DoF improvement over the DoF-optimal scheme designed for the fully connected interference channel, while also requiring no feedback of the weak link's channel state information.
引用
收藏
页码：2282 / 2285
页数：4
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