Interference alignment aided by relays for the quasi-static X channel

Author

Jin, Dong-Sup ; No, Jong-Seon ; Shin, Dong-Joon

Author_Institution

Dept. of EECS, Seoul Nat. Univ., Seoul, South Korea

fYear

2011

fDate

July 31 2011-Aug. 5 2011

Firstpage

2637

Lastpage

2641

Abstract

In this paper, two relay-aided interference alignment (IA) schemes are proposed for the quasi-static M×2 X channel. The first scheme utilizes one full-duplex relay and the second scheme utilizes two half-duplex relays. In the proposed schemes, transmitters transmit in every time slot and relays operate in amplify-and-forward (AF) mode. By confirming the linear independence between the desired signals and interference and also among the desired signals, it is shown that the proposed schemes can achieve 2M/(M + 1) degrees of freedom (DoF) which is the maximum DoF of M × 2 X channel.

Keywords

amplify and forward communication; radio transmitters; radiofrequency interference; wireless channels; AF mode; DoF; amplify-and-forward mode; degree of freedom; full-duplex relay; half-duplex relays; quasi-static X channel; radio transmitters; relay-aided IA schemes; relay-aided interference alignment scheme; Equations; Interference channels; Random variables; Receivers; Relays; Transmitters; Full-duplex relaying; X channel; half-duplex relaying; interference alignment (IA); relay-aided interference alignment;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory Proceedings (ISIT), 2011 IEEE International Symposium on

Conference_Location

St. Petersburg

ISSN

2157-8095

Print_ISBN

978-1-4577-0596-0

Electronic_ISBN

2157-8095

Type

conf

DOI

10.1109/ISIT.2011.6034048

Filename

6034048