$(n,K)$-User Interference Channels: Degrees of Freedom

On the Secure Degrees of Freedom of the K-user MAC and 2-user Interference Channels

We investigate the secure degrees of freedom (SDoF) of the K-user MIMO multiple access (MAC) and the two user MIMO interference channel. An unknown number of eavesdroppers are trying to decode the messages sent by the transmitters. Each eavesdropper is equipped with a number of antennas less than or equal to a known value NE . The legitimate transmitters and receivers are assumed to have global...

Secure Degrees of Freedom of K-User Gaussian Interference Channels: A Unified View

We determine the exact sum secure degrees of freedom (d.o.f.) of the K -user Gaussian interference channel. We consider three different secrecy constraints: 1) K -user interference channel with one external eavesdropper (IC-EE); 2) K -user interference channel with confidential messages (IC-CM); and 3) K -user interference channel with confidential messages and one external eavesdropper (IC-CM-...

ADDENDUM to “Degrees of Freedom in Vector Interference Channels”

The Expected Achievable Distortion of Two-User Decentralized Interference Channels

This paper concerns the transmission of two independent Gaussian sources over a two-user decentralized interference channel, assuming that the transmitters are unaware of the instantaneous CSIs. The availability of the channel state information at receivers (CSIR) is considered in two scenarios of perfect and imperfect CSIR. In the imperfect CSIR case, we consider a more practical assumption of...

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

For the fully connected K user wireless interference channel where the channel coefficients are time-varying and are drawn from a continuous distribution, the sum capacity is characterized as C(SNR) = K 2 log(SNR) + o(log(SNR)). Thus, the K user time-varying interference channel almost surely has K=2 degrees of freedom. Achievability is based on the idea of interference alignment. Examples are ...