Title :
Block Diagonalization with user antenna selection for multiuser MIMO systems
Author :
Nishimori, Kentaro ; Kataoka, Ryohei ; Makino, Hiroaki
Author_Institution :
Fac. of Eng., Niigata Univ., Niigata, Japan
Abstract :
Multi-user MIMO (MU-MIMO) improves the system channel capacity by employing the transmission between a base station and multiple user terminals (UT). Block Diagonalization (BD) has been proposed in order to realize MU-MIMO broadcast. The BD algorithm cancels inter-user interference by creating the weights so that the channel matrixes for the other users are set to be zero matrixes. However, when the number of transmit antennas is equals to the total number of received antennas, the transmission rate by the BD algorithm is decreased. In this paper, we propose the antenna selection method to reduce the number of nulls for the other users except an intended user by the BD algorithm. It is verified that the proposed method is effective compared to the conventional BD algorithm, especially, when the number of users is increased with a low bit rate.
Keywords :
MIMO communication; interference; matrix algebra; receiving antennas; transmitting antennas; wireless channels; BD algorithm; MU-MIMO); UT; antenna selection method; antenna transmitters; base station; block diagonalization; channel capacity; channel matrixes; interuser interference; multiple user terminals; multiuser MIMO systems; received antennas; user antenna selection; zero matrixes; Bit error rate; Eigenvalues and eigenfunctions; Interference; Receiving antennas; Signal to noise ratio; Transmitting antennas;
Conference_Titel :
Antennas and Propagation (EuCAP), 2013 7th European Conference on
Conference_Location :
Gothenburg
Print_ISBN :
978-1-4673-2187-7
Electronic_ISBN :
978-88-907018-1-8
