MIMO-MLDマルチキャスト通信における伝送特性改善法の検討

概要

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In MIMO(Multiple Input-Multiple Out put)-MLD (Maximum Likelihood Detection) multicast communication systems, the communication quality at receivers varies depending on the channel status between the transmitter and the receiver. The subject of this paper to present an improvement technique of the MIMO multicast transmission system. We propose a new method of increasing transmission performance to multiple receivers by adopting precoding at the transmitters in the MIMO-MLD transmission system. In this research we propose two schemes, precoding selection scheme and precoding switching scheme. In the selection scheme, precoding weights are chosen according to the channel status of the receiver at the worst transmission state among multiple receivers, and in the precoding switching scheme, precoding weights are switched in time. The switching scheme is combined with error correction and interleaving techniques to effectively decrease the bit errors. We present the configurations of the proposed schemes and evaluate the transmission performance via computer simulations of wireless communication channels.
2013-07-00