A linear transceiver design for multiuser MIMO relay downlink systems

doi:10.7523/j.issn.2095-6134.2015.03.013

Abstract

Abstract:

A linear transceiver optimization design based on the regularized block diagonalization (RBD) algorithm is proposed for the multiuser multiple-input multiple-output (MU-MIMO) relay downlink system. Considering that the source can not obtain the channel state information (CSI) of the second hop and the user can not obtain the CSI of the first hop, we optimize the transceiver design for the source-relay link and the relay-multiuser link, respectively. We use RBD algorithm at the relay to reduce the multiuser interference and noise, and then joint the receiver matrix to design an improved iterative algorithm based on the minimum mean square error (MMSE) criterion. Simulation results show that the proposed algorithm converges to a fixed value in a few iterations and it has a good bit error rate (BER) performance within the low signal-to-noise ratio (SNR) region.

Key words: MU-MIMO, relay, RBD, MMSE

CLC Number:

TN929.5

WANG Chuan, QIU Ling. A linear transceiver design for multiuser MIMO relay downlink systems[J]. , 2015, 32(3): 378-383.

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