# Degrees of freedom (DoF) of locally connected interference channels with coordinated multi-point (CoMP) transmission

@article{Gamal2012DegreesOF, title={Degrees of freedom (DoF) of locally connected interference channels with coordinated multi-point (CoMP) transmission}, author={A. E. Gamal and V. Annapureddy and V. Veeravalli}, journal={2012 IEEE International Conference on Communications (ICC)}, year={2012}, pages={2293-2297} }

The degrees of freedom (DoF) available for communication provides an analytically tractable way to characterize the information-theoretic capacity of interference channels. In this paper, the DoF of a K-user interference channel is studied under the assumption that the transmitters can cooperate via coordinated multi-point (CoMP) transmission. In [1], the authors considered the linear asymmetric model of Wyner, where each transmitter is connected to its own receiver and its successor, and is… Expand

#### 16 Citations

On optimal message assignments for interference channels with CoMP transmission

- Computer Science, Mathematics
- 2012 46th Annual Conference on Information Sciences and Systems (CISS)
- 2012

This work relaxes the cooperation constraint such that each message can be assigned to M transmitters without imposing further constraints on their location and studies properties for different message assignments in terms of the gain in the per user DoF number over that achieved without cooperation. Expand

Degrees of freedom (DoF) of locally connected interference channels with cooperating multiple-antenna transmitters

- Mathematics, Computer Science
- 2012 IEEE International Symposium on Information Theory Proceedings
- 2012

This work shows that a simple linear strategy employing zero forcing transmit beams achieves min {2MN/M(N+1)+L, 1} per user degrees of freedom, and generalizes the upper bound proved for Wyner's asymmetric channel model. Expand

Interference Channels With Coordinated Multipoint Transmission: Degrees of Freedom, Message Assignment, and Fractional Reuse

- Computer Science, Mathematics
- IEEE Transactions on Information Theory
- 2014

The capacity gain achieved through CoMP transmission is studied in various models of wireless networks that have practical significance and the capacity gain is analyzed through the degrees of freedom (DoF) criterion. Expand

Interference Channels with CoMP: Degrees of Freedom, Message Assignment, and Fractional Reuse

- Computer Science
- ArXiv
- 2012

The capacity achieved through CoMP is studied in various models of wireless networks that have practical significance, and the asymptotic per user DoF is shown to be at least max. Expand

Cellular interference alignment

- Computer Science, Mathematics
- 2014 IEEE International Symposium on Information Theory
- 2014

This work designs an alignment scheme which is topologically robust and still achieves the same optimum DoFs, and considers a message-passing network architecture, in which nearby sectors can exchange already decoded messages and propose an alignment solution that can achieve the optimal DoFs. Expand

Cellular Interference Alignment

- Mathematics, Computer Science
- IEEE Trans. Inf. Theory
- 2015

This paper provides a decoding order and a one-shot interference alignment scheme able to achieve optimal per-sector DoFs, up to an additive gap due to boundary effects, that vanishes as the size of the network becomes large. Expand

The role of transmitter cooperation in linear interference networks with block erasures

- Mathematics, Computer Science
- 2017 51st Asilomar Conference on Signals, Systems, and Computers
- 2017

The key idea to the results is to understand that the role of cooperation shifts from increasing the probability of delivering a message to its intended destination at high values of p, to interference cancellation at lowvalues of p. Expand

Degrees of Freedom of Wyner's linear asymmetric channel

- Computer Science
- 2012 1st IEEE International Conference on Communications in China (ICCC)
- 2012

This paper investigates the Degrees of Freedom (DoF) of Wyner's linear asymmetric channel where each transmitter connects to its own receiver and one successive receiver and the conditions with and without channel state information at transmitters. Expand

On Uplink-Downlink Duality for Cellular IA

- Mathematics, Computer Science
- ArXiv
- 2014

This work provides the dual framework for the downlink of cellular networks with the same backhaul architecture, and shows that for every "one-shot" IA scheme that can achieve $d$ DoFs per user in the uplink, there exists a dual IA scheme which can achieve the same DoFs in the down link. Expand

On the limitations of cooperation in wireless networks

- Computer Science
- 2012 Information Theory and Applications Workshop
- 2012

It is shown that even perfect cooperation cannot in general change an interference-limited network to a noise-limited one, and the existence of a spectral efficiency upper bound that does not grow with P is shown. Expand

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