Title :
A vector perturbation based transmit diversity scheme for multiuser MIMO systems
Author :
Park, Jungyong ; Shim, Byonghyo
Author_Institution :
Sch. of Inf. & Commun., Korea Univ., Seoul, South Korea
Abstract :
In this paper, we propose a transmit diversity scheme based on the vector perturbation for a multiuser multiple-input multiple-output (MIMO) broadcasting system. Our method is inspired by the fact that precoding process of the vector perturbation designed to suppress the multiuser interference causes a reduction of the transmitted signal power. In order to boost up the transmit power, we employ a non-integer based vector perturbation together with temporal transmit diversity. We show from the simulation on 10 Ã 10 multiuser MIMO system with 16-QAM modulation that the proposed method outperforms the repetition scheme as well as the vector perturbation.
Keywords :
MIMO communication; multiuser detection; perturbation techniques; quadrature amplitude modulation; QAM modulation; multiuser interference; multiuser multiple-input multiple-output broadcasting system; repetition scheme; transmit diversity scheme; vector perturbation; AWGN; Broadcasting; Covariance matrix; Interference suppression; MIMO; Mobile antennas; Receiving antennas; Signal design; Signal processing; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
DOI :
10.1109/PIMRC.2009.5449968