On Degrees of Freedom Region of MIMO Networks without CSIT

Abstract

In this paper, we study the effect of the absence of channel knowledge for multiple-input-multiple-output (MIMO) networks. Specifically, we assume perfect channel state information at the receivers, no channel state information at the transmitter(s), and independent identically distributed (i.i.d.) Rayleigh fading across antennas, users and time slots. We provide the characterization of the degrees of freedom (DoF) region for a 2-user MIMO broadcast channel. We then provide a DoF region outer bound for a 2-user MIMO interference channel. This bound is shown to be tight for all possible combinations of the number of antennas at each node except for one case. As a byproduct of this analysis we point out the potential of interference alignment in the 2-user MIMO interference channel with no CSIT.

14 pages, 5 figures

References in corpus (1)

• On the Capacity of Fading MIMO Broadcast Channels with Imperfect Transmitter Side-Information

Cited by in corpus (7)

• On the Degrees of Freedom of Finite State Compound Wireless Networks - Settling a Conjecture by Weingarten et. al
• The Generalized Degrees of Freedom Region of the MIMO Interference Channel
• Isotropic MIMO Interference Channels without CSIT: The Loss of Degrees of Freedom
• The DoF Region of the Multiple-Antenna Time Correlated Interference Channel with Delayed CSIT
• A New Outer-Bound via Interference Localization and the Degrees of Freedom Regions of MIMO Interference Networks with no CSIT
• Degrees of Freedom Regions of Two-User MIMO Z and Full Interference Channels: The Benefit of Reconfigurable Antennas
• On the Degrees of Freedom Regions of Two-User MIMO Z and Full Interference Channels with Reconfigurable Antennas