A two-stage precoding method based on interference alignment for interference channel systems

Authors:
Hakjea Sung;Seok-Hwan Park;Kyoung-Jae Lee;Inkyu Lee
Affiliations:
Korea University, Seoul, Korea;Korea University, Seoul, Korea;Korea University, Seoul, Korea;Korea University, Seoul, Korea
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 5
Cited 0

On achievable rate regions for the Gaussian interference channel

IEEE Transactions on Information Theory
Limited feedback unitary precoding for spatial multiplexing systems

IEEE Transactions on Information Theory
Degrees of Freedom for the MIMO Interference Channel

IEEE Transactions on Information Theory
Interference Alignment and Degrees of Freedom of the -User Interference Channel

IEEE Transactions on Information Theory
Gaussian Interference Channel Capacity to Within One Bit

IEEE Transactions on Information Theory

Quantified Score

Hi-index	0.00

Visualization

Abstract

It was shown by Cadambe and Jafar that the interference alignment (IA) algorithm achieves the theoretical bound on degrees of freedom (DOF) for interference channel systems. However, since this method addresses the precoder design problem from the DOF point of view, some optimization processes are additionally needed in order to improve the sum rate performance. In this paper, based on the IA method, we propose a two-stage optimization of the precoding and decoding matrices in the interference channels. Simulation results show that the proposed method significantly improves the sum rate of the conventional IA scheme while maintaining the optimality of the DOF.