Title :
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
fDate :
Aug. 29 2011-Sept. 2 2011
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;
Conference_Titel :
Signal Processing Conference, 2011 19th European
Conference_Location :
Barcelona
