Title :
Autonomic Coordinated Beamforming for Multi-user MIMO-BC
Author :
He, Jin ; Salehi, Masoud
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA
Abstract :
We propose a novel linear transmit beamforming technique for multi-user MIMO broadcast channels (BC). We lower bound the product of all users´ received SINRs when MMSE receivers are employed by all users. The proposed closed-form solution for transmit beamforming maximizes the lower bound of the product SINRs in an autonomic way. Unlike the zero-forcing beamforming (ZFBF), which can completely cancel the interference but is not concerned with the signal strength, the autonomic beamforming (ABF) makes a balance between canceling the interference and maintaining the signal strength. Additionally, ABF loosens the constraint on the number of transmit antennas in ZFBF.
Keywords :
MIMO communication; array signal processing; broadcast channels; interference suppression; least mean squares methods; multiuser detection; radio receivers; transmitting antennas; MMSE receiver; closed-form solution; interference cancellation; linear transmit beamforming technique; minimum mean square error; multiple input multiple output system; multiuser MIMO broadcast channel; transmit antenna; zero-forcing beamforming; Array signal processing; Broadcasting; Communication systems; Interference cancellation; Interference constraints; MIMO; Receiving antennas; Signal to noise ratio; Transmitters; Transmitting antennas;
Conference_Titel :
Information Sciences and Systems, 2006 40th Annual Conference on
Conference_Location :
Princeton, NJ
Print_ISBN :
1-4244-0349-9
Electronic_ISBN :
1-4244-0350-2
DOI :
10.1109/CISS.2006.286448
