A Two-Stage Precoding Method Based on Interference Alignment for Interference Channel Systems

Author

Sung, Hakjea ; Park, Seok-Hwan ; Lee, Kyoung-Jae ; Lee, Inkyu

Author_Institution

Sch. of Electr. Eng., Korea Univ., Seoul, South Korea

fYear

2009

Firstpage

1

Lastpage

6

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.

Keywords

channel coding; decoding; interference (signal); precoding; wireless channels; decoding matrix; degrees of freedom; interference alignment; interference channel systems; optimization process; precoder design problem; precoding matrix; two-stage optimization; two-stage precoding method; Decoding; Design optimization; Information technology; Information theory; Interference channels; Optimization methods; Signal processing algorithms; Signal to noise ratio; Space technology; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE

Conference_Location

Honolulu, HI

ISSN

1930-529X

Print_ISBN

978-1-4244-4148-8

Type

conf

DOI

10.1109/GLOCOM.2009.5425263

Filename

5425263