740 citations · 3.8k across the 111 of their papers we have counts for
13 papers · 2 filters
Interference Alignment and a Noisy Interference Regime for Many-to-One Interference Channels
Viveck R. Cadambe, Syed A. Jafar
We study the capacity of discrete memoryless many-to-one interference channels, i.e., K user interference channels where only one receiver faces interference. For a class of many-t…
On Feasibility of Interference Alignment in MIMO Interference Networks
Cenk M. Yetis, Tiangao Gou, Syed A. Jafar +1
We explore the feasibility of interference alignment in signal vector space -- based only on beamforming -- for K-user MIMO interference channels. Our main contribution is to relat…
Degrees of Freedom of Multi-Source Relay Networks
Sang-Woon Jeon, Sae-Young Chung, Syed A. Jafar
We study a multi-source Gaussian relay network consisting of source--destination pairs having unicast sessions. We assume layers of relays between the sources and the d…
Exploiting Channel Correlations - Simple Interference Alignment Schemes with no CSIT
Syed A. Jafar
We explore 5 network communication problems where the possibility of interference alignment, and consequently the total number of degrees of freedom (DoF) with channel uncertainty…
On the Degrees of Freedom of Finite State Compound Wireless Networks - Settling a Conjecture by Weingarten et. al
Tiangao Gou, Syed A. Jafar, Chenwei Wang
We explore the degrees of freedom (DoF) of three classes of finite state compound wireless networks in this paper. First, we study the multiple-input single-output (MISO) finite st…
On Degrees of Freedom Region of MIMO Networks without CSIT
Chiachi Huang, Syed A. Jafar, Shlomo Shamai +1
In this paper, we study the effect of the absence of channel knowledge for multiple-input-multiple-output (MIMO) networks. Specifically, we assume perfect channel state information…
On the Beamforming Design for Efficient Interference Alignment
Sang Won Choi, Syed A. Jafar, Sae-Young Chung
An efficient interference alignment (IA) scheme is developed for -user single-input single-output frequency selective fading interference channels. The main idea is to steer the…
The Diversity Multiplexing Tradeoff for Interference Networks
Aydin Sezgin, Syed Ali Jafar, Hamid Jafarkhani
The diversity-multiplexing tradeoff (DMT) for interference networks, such as the interference channel, the X channel, the Z interference channel and the Z channel, is analyzed. In…
Capacity of a Class of Symmetric SIMO Gaussian Interference Channels within O(1)
Tiangao Gou, Syed A. Jafar
The N+1 user, 1 x N single input multiple output (SIMO) Gaussian interference channel where each transmitter has a single antenna and each receiver has N antennas is studied. The s…
Feasibility Conditions for Interference Alignment
Cenk M. Yetis, Syed A. Jafar, Ahmet H. Kayran
The degrees of freedom of MIMO interference networks with constant channel coefficients are not known in general. Determining the feasibility of a linear interference alignment sol…
Interference Alignment with Asymmetric Complex Signaling - Settling the Host-Madsen-Nosratinia Conjecture
Viveck R. Cadambe, Syed A. Jafar, Chenwei Wang
It has been conjectured by Host-Madsen and Nosratinia that complex Gaussian interference channels with constant channel coefficients have only one degree-of-freedom regardless of t…
The Ergodic Capacity of Phase-Fading Interference Networks
Syed A. Jafar
We identify the role of equal strength interference links as bottlenecks on the ergodic sum capacity of a user phase-fading interference network, i.e., an interference network…
Ergodic Interference Alignment
Bobak Nazer, Michael Gastpar, Syed A. Jafar +1
This paper develops a new communication strategy, ergodic interference alignment, for the K-user interference channel with time-varying fading. At any particular time, each receive…