FIELD: data transmission technique.
SUBSTANCE: invention relates to data transmission equipment and is intended for users of mobile communication systems. System includes one or more energy-independent computer-readable media containing instructions, which, in response to their execution by user device (UE), cause UE to perform the channel status information (CSI-RS) reference signal reception by the UE; determining channel state information (CSI) based on CSI-RS; selecting a first index, a second index and a third CSI-based index, wherein the first index, the second index and the third index comprise a precoding matrix indicator for the three-dimensional codebook; and generating a report for transmission to a base station, wherein the report includes an indication of a first index, a second index and a third index.
EFFECT: technical result consists in increase of information volume and quality of transmission channels.
25 cl, 8 dwg
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