Title :
Cooperative Precoding, Beamforming and Power Allocation in MU-MIMO Relay Networks
Author :
Aboutorab, Neda ; Hardjawana, Wibowo ; Vucetic, Branka
Author_Institution :
Sch. of Electr. & Inf. Eng., Univ. of Sydney, Sydney, NSW, Australia
Abstract :
In this paper, we investigate a cooperative transmission method employing precoding, beamforming and power allocation for a multi-user multiple-input multiple-output (MU-MIMO) relay network. In the proposed scheme, the interference is canceled by using the combination of beamforming weights and Tomlinson-Harashima precoding (THP). To achieve symbol error rate (SER) fairness among different users and further improve the performance of MU-MIMO relay networks, we propose a low-complexity power allocation (LC-PA) that allocates power to each user so that the signal-to-interference-and-noise-ratio (SINR) for all users are equal. The simulation results show that the SER performance of the proposed scheme considerably outperforms other existing schemes under the same configuration.
Keywords :
MIMO communication; array signal processing; cooperative communication; error statistics; interference suppression; precoding; MU-MIMO relay networks; Tomlinson-Harashima precoding; beamforming weights; cooperative precoding; cooperative transmission method; interference cancellation; low-complexity power allocation; multi-user multiple-input multiple-output relay network; signal-to-interference-and-noise-ratio; symbol error rate; Array signal processing; Interference; MIMO; Relays; Resource management; Signal to noise ratio; Vectors;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2011.6133600