Aligned Interference Neutralization and the Degrees of Freedom of the 2x2x2 Interference Channel

Abstract

We show that the 2x2x2 interference channel, i.e., the multihop interference channel formed by concatenation of two 2-user interference channels achieves the min-cut outer bound value of 2 DoF, for almost all values of channel coefficients, for both time-varying or fixed channel coefficients. The key to this result is a new idea, called aligned interference neutralization, that provides a way to align interference terms over each hop in a manner that allows them to be cancelled over the air at the last hop.

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Cited by in corpus (4)

• Aligned Interference Neutralization and the Degrees of Freedom of the 2 User Interference Channel with Instantaneous Relay
• Multiple Unicast Capacity of 2-Source 2-Sink Networks
• On Achievable Schemes of Interference Alignment in Constant Channels via Finite Amplify-and-Forward Relays
• Degrees of Freedom of Multi-hop MIMO Broadcast Networks with Delayed CSIT