Degrees of Freedom of the MIMO Interference Channel with Cooperation and Cognition
Chiachi Huang, Syed A. Jafar

TL;DR
This paper analyzes the degrees of freedom in a MIMO interference channel, showing that cognitive message sharing can increase DOF while cooperation alone cannot, with implications for system design.
Contribution
It derives the DOF for MIMO interference channels with cooperation and cognitive sharing, revealing that only cognitive sharing can enhance DOF.
Findings
Cognitive message sharing increases the DOF of the channel.
Cooperation alone does not increase the DOF.
Having a cognitive transmitter is more beneficial than a cognitive receiver.
Abstract
In this paper, we explore the benefits, in the sense of total (sum rate) degrees of freedom (DOF), of cooperation and cognitive message sharing for a two-user multiple-input-multiple-output (MIMO) Gaussian interference channel with , antennas at transmitters and , antennas at receivers. For the case of cooperation (including cooperation at transmitters only, at receivers only, and at transmitters as well as receivers), the DOF is , which is the same as the DOF of the channel without cooperation. For the case of cognitive message sharing, the DOF is where when transmitter is (is not) a cognitive transmitter and is defined in the same…
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Taxonomy
TopicsWireless Communication Security Techniques · Advanced MIMO Systems Optimization · Molecular Communication and Nanonetworks
