Title :
Effect of spatial correlation on MMSE-based interference alignment in a multiuser MIMO MB-OFDM system
Author :
Le, Chung ; Dimitrov, Emil ; Anggraini, Anggia ; Peissig, Jiirgen ; Kuchenbecker, Hans-Peter
Author_Institution :
Inst. of Commun. Technol., Leibniz Univ. of Hannover, Hannover, Germany
Abstract :
In this paper, we investigate the impact of antenna spatial correlation on the performance of K-user MIMO interference channel, in which interference alignment technique is employed to align all interferences at receivers. In order to improve the sum-rate and BER performances of the system in low SNR regimes the MMSE-based interference alignment algorithm is deployed. This paper considers a multiuser MIMO UWB system based on MB-OFDM (Multiband-Orthogonal Frequency Division Multiplexing) with two independent data streams per user and focuses mainly on spatial correlation among transmit and receive antennas. The simulation results confirm the superior BER performance of the MMSE-based interference alignment in the MIMO channels with less spatial correlation.
Keywords :
MIMO communication; OFDM modulation; antenna arrays; correlation methods; error statistics; least mean squares methods; multiuser channels; radiofrequency interference; receiving antennas; transmitting antennas; BER performances; MB-OFDM; MIMO channels; MMSE-based interference alignment technique; antenna spatial correlation effect; k-user MIMO interference channel; multiband-orthogonal frequency division multiplexing; multiuser MIMO MB-OFDM system; receive antennas; receivers; transmit antennas; Bit error rate; Correlation; Heating; Interference; MIMO; Nickel; Signal to noise ratio; Interference Alignment; MMSE; Multiuser MIMO MB-OFDM; Spatial Correlation; UWB;
Conference_Titel :
Wireless and Mobile Computing, Networking and Communications (WiMob), 2012 IEEE 8th International Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4673-1429-9
DOI :
10.1109/WiMOB.2012.6379158
