Degrees of Freedom of Interference Channels With Hybrid Beamforming

ADDENDUM to “Degrees of Freedom in Vector Interference Channels”

Degrees of freedom of wireless interference network

The degrees of freedom (DoF) concept is very useful for studying the multi-user communications system at high signal-to-noise ratio region. The research on DoF leads to an important technology advancement in wireless communications, the interference alignment. The idea of interference alignment is to design the transmit signals structurally such that the interference signals from multiple inter...

On the Capacity and Degrees of Freedom Regions of MIMO Interference Channels with Limited Receiver Cooperation

This paper gives the approximate capacity region of a two-user MIMO interference channel with limited receiver cooperation, where the gap between the inner and outer bounds is in terms of the total number of receive antennas at the two receivers and is independent of the actual channel values. The approximate capacity region is then used to find the degrees of freedom region. For the special ca...

The Degrees of Freedom Regions of MIMO Broadcast, Interference, and Cognitive Radio Channels with No CSIT

The degrees of freedom (dof) regions are characterized for the multiple-input multipleoutput (MIMO) broadcast channel (BC), the interference channel (IC), and the cognitive radio channel (CRC) when there is perfect and no channel state information at the receivers and the transmitter(s) (CSIR and CSIT), respectively. For the K-user MIMO BC, the exact characterization of the dof region is obtain...

Relay-Assisted Interference Channel: Degrees of Freedom

This paper investigates the degrees of freedom of the interference channel in the presence of a dedicated MIMO relay. The relay is used to manage the interference at the receivers. It is assumed that all nodes including the relay have channel state information only for their own links and that the relay has M ≥ K antennas in a K-user network. We pose the question: What is the benefit of exploit...