Transmission technique for a downlink multiuser MIMO system operating under imperfect CSI at transmitter

The knowledge of channel state information (CSI) at the receiver or transmitter is the key factor in devising a suitable transmission technique for a multiple input multiple output (MIMO) system. This paper investigates an impact of imperfect CSI at transmitter on the performance of a downlink multiuser MIMO system. A new transmission technique is proposed to enhance the system performance under such a condition. The simulation results confirm the advantageous of the proposed technique over the other techniques presented in the MIMO literature.

[1]  Aylin Yener,et al.  MMSE transmitter design for correlated MIMO systems with imperfect channel estimates: power allocation trade-offs , 2006, IEEE Transactions on Wireless Communications.

[2]  Ross D. Murch,et al.  A transmit preprocessing technique for multiuser MIMO systems using a decomposition approach , 2004, IEEE Transactions on Wireless Communications.

[3]  Martin Haardt,et al.  Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels , 2004, IEEE Transactions on Signal Processing.

[4]  Yongle Wu,et al.  Linear transmitter precoding design for downlink of multiuser MIMO systems , 2005 .

[5]  Alex B. Gershman,et al.  Training-based MIMO channel estimation: a study of estimator tradeoffs and optimal training signals , 2006, IEEE Transactions on Signal Processing.

[6]  Bhaskar D. Rao,et al.  Whitening-rotation-based semi-blind MIMO channel estimation , 2006, IEEE Transactions on Signal Processing.

[7]  Charles R. Johnson,et al.  Matrix analysis , 1985, Statistical Inference for Engineers and Data Scientists.

[8]  Chan-Soo Hwang,et al.  A random beamforming technique in MIMO systems exploiting multiuser diversity , 2003, IEEE International Conference on Communications, 2003. ICC '03..