Interference Alignment and Degrees of Freedom of the K-User Interference Channel

Date Added: Jan 2010
Format: PDF

Information theorists have pursued capacity characterizations of interference channels for over three decades. These efforts have produced an extensive array of interesting results that shed light on various aspects of the problem. Recently, a special case of the Han-Kobayashi scheme is to achieve the capacity of the two-user interference channel within one bit. It is also provides a generalized degrees of freedom characterization that identifies different operational regimes for the two-user interference channel. For optimal wireless network design, the natural question is whether the insights from the two-user interference channel generalize to interference channel scenarios with more than two users.