Feedback Can Increase the Degrees of Freedom of the Rank-Deficient Interference Channel

被引：0

作者：

Chae, Sung Ho ^{[1
]}

Suh, Changho ^{[1
]}

Chung, Sae-Young ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea

来源：

2013 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS (ISIT) | 2013年

关键词：

CAPACITY;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

We characterize the total degrees of freedom (DoF) of the two-user rank-deficient interference channel with feedback, in which transmitter i and receiver j use M-i and N-j antennas, respectively, and the rank of the channel matrix between transmitter i and receiver j is given by D-ji <= min(M-i, N-j) for all i, j - 1, 2. One consequence of this result is that feedback can increase the DoF when the number of antennas at each node is large enough as compared to the ranks of channel matrices. This finding is in contrast to the full-rank interference channel where feedback provides no DoF gain. The gain comes from using feedback to provide alternative signal paths, thereby effectively increasing the ranks of desired channel matrices.

引用

页码：36 / 40

页数：5

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