WSEAS Transactions on Communications
Print ISSN: 1109-2742, E-ISSN: 2224-2864
Volume 12, 2013
LTE Optimal Transmission Mode Selection Guidelines over MIMO Channels
Authors: ,
Abstract: In LTE /LTE -advanced standards, the physical layer is mapped into multiple transmission modes(TM) and each TM should be dynamically selected depending on the time-varying MIMO channel. Besides the single antenna SISO transmission (TM1), multielement antenna (MIMO) technology such as Open Loop Spatial Multiplexing (OLSM) and Close Loop Spatial Multiplexing (CLSM) transmission are also specified by the 3GPP standard for LTE downlink transmission. In this paper, on the basis of study upon interaction between MIMO channel correlations through the correlation metric in terms of the amount of correlation with MIMO Diversity-Multiplexing Trade-off (DMT), we propose an optimal transmission mode switching method by delimiting wisely guards intervals of different correlation environment levels.
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Keywords: LTE, MIMO, Spatial Multiplexing, OLSM, DMT, Amount of Correlation, Transmission Mode, OSTBC