Interference Alignment and Spatial Degrees of Freedom for the K User Interference Channel

By Viveck R. Cadambe, Syed Ali Jafar. IEEE International Conference on Communications, 2007

447 citations recorded by the source corpus.

We show that the sum capacity of the K user frequency selective (or time-varying) interference channel is C(SNR) = (K/2) log(SNR) +o(log(SNR)) meaning that the channel has a total of K/2 degrees of freedom per orthogonal time and frequency dimension. Linear schemes of interference alignment and zero forcing suffice to achieve all the degrees of freedom and multi-user detection is not required.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/194d887403448293d7f917351199efe971a8df50

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Electrical and Electronic Engineering

1. Changho Suh
2. David Tse
3. Pavel Mach
4. Tomas Vanek
5. Zdenek Becvar
6. Syed Ali Jafar
7. Rui Zhang
8. Robert W. Heath

Citations in the corpus

• Optimal Exact-Regenerating Codes for Distributed Storage at the MSR and MBR Points via a Product-Matrix Construction (2010, background): “The concept of interference alignment was introduced in [21] and [22] in the context of wireless communication.”
• In-Band Device-to-Device Communication in OFDMA Cellular Networks: A Survey and Challenges (2015, methodology): “to improve spectral efficiency, the interference alignment (IA) method can be used [98].”
• Interference Alignment for Cellular Networks (2008, methodology): “The idea of the achievable scheme is interference alignment [5], [ 2 ].”