Experimental evaluation of Interference Alignment under imperfect channel state information

Author

Garcia-Naya, J.A. ; Castedo, L. ; Gonzalez, O. ; Ramirez, D. ; Santamaria, I.

Author_Institution

Dept. of Electron. & Syst., Univ. of A Coruna, Coruna, Spain

fYear

2011

fDate

Aug. 29 2011-Sept. 2 2011

Firstpage

1085

Lastpage

1089

Abstract

Interference Alignment (IA) has been revealed as one of the most attractive transmission techniques for the K-user interference channel. In this work, we employ a multiuser Multiple-Input Multiple-Output (MIMO) testbed to analyze, in realistic indoor scenarios, the impact of channel state information errors on the sum-rate performance of IA. We restrict our study to a 3-user interference network in which each user transmits a single data stream using two transmit and two receive antennas. For this MIMO interference network, only two different IA solutions exist. We also evaluate the performance gain obtained in practice by using the IA solution that maximizes the sum-rate.

Keywords

MIMO communication; antenna arrays; indoor radio; radio receivers; radio transmitters; radiofrequency interference; receiving antennas; transmitting antennas; wireless channels; 3-user interference network; IA evaluation; MIMO testbed; data streaming; imperfect channel state information; indoor radio; interference alignment evaluation; k-user interference channel; multiuser multiple-input multiple-output testbed; receiving antenna; sum-rate performance; transmitting antenna; Channel estimation; Data communication; Decoding; Interference channels; MIMO; Receivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2011 19th European

Conference_Location

Barcelona

ISSN

2076-1465

Type

conf

Filename

7074244