Interference alignment in MIMO interference relay channels

Xiang Chen, S. H. Song, Khaled Ben Letaief

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

The degrees of freedom (DoF) has been recognized as a powerful metric to characterize the capacity of interference channels in the high signal-to-noise (SNR) region. In this paper, by utilizing linear interference alignment, we investigate the DoF of multiple-input and multiple-output (MIMO) interference relay channels without symbol extensions. An innovative algorithm is presented to align the interference, where the filter matrices at the sources, relays and destinations are determined in an iterative manner. Based on the assumption that improperness of the alignment condition implies its unsolvability, an upper bound for the achievable DoF tuple by linear interference alignment is derived, and then utilized to examine the performance of the proposed alignment algorithm. Simulation results show that the iterative algorithm can achieve the upper bound in medium to high DoF regions.

Original languageEnglish
Title of host publication2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
Pages630-634
Number of pages5
DOIs
Publication statusPublished - 1 Aug 2012
Event2012 IEEE Wireless Communications and Networking Conference, WCNC 2012 - Paris, France
Duration: 1 Apr 20124 Apr 2012

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511

Other

Other2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
CountryFrance
CityParis
Period1/4/124/4/12

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Chen, X., Song, S. H., & Ben Letaief, K. (2012). Interference alignment in MIMO interference relay channels. In 2012 IEEE Wireless Communications and Networking Conference, WCNC 2012 (pp. 630-634). [6214445] (IEEE Wireless Communications and Networking Conference, WCNC). https://doi.org/10.1109/WCNC.2012.6214445