Degrees of freedom for the MIMO interference channel

被引：368

作者：

Jafar, Syed Ali ^{[1
]}

Fakhereddin, Maralle Jannal

机构：

[1] Univ Calif Irvine, Dept Elect Engn & Comp Sci, Irvine, CA 92697 USA

[2] CALTECH, Pasadena, CA 91125 USA

来源：

IEEE TRANSACTIONS ON INFORMATION THEORY | 2007年 / 53卷 / 07期

关键词：

broadeast; degrees of freedom (DOF); interference; multiple-input-multiple-output (MIMO); multiple access; zero forcing; OUTER BOUNDS; CAPACITY;

D O I：

10.1109/TIT.2007.899557

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this correspondence, we show that the exact number of spatial degrees of freedom (DOF) for a two user nondegenerate (full rank channel matrices) multiple-input-multiple-output (MIMO) Gaussian interference channel with M-1, M-2 antennas at transmitters 1, 2 and N-1, N-2 antennas at the corresponding receivers, and perfect channel knowledge at all transmitters and receivers, is min{M-1 + M-2, N-1 + N-2, max(M-1, M-2), max(M-2, N-1)}. A constructive achievability proof shows that zero forcing is sufficient to achieve all the available DOF on the two user MIMO interference channel. We also show through an example of a share-and-transmit scheme how the gains of transmitter cooperation may be entirely offset by the cost of enabling that cooperation so that the available DOF are not increased.

引用

页码：2637 / 2642

页数：6

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