Base station apparatus, terminal apparatus, wireless communication system and integrated circuit
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United States of America Patent
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Jan 3, 2023
Grant Date -
Aug 18, 2022
app pub date -
Apr 27, 2022
filing date -
Dec 6, 2012
priority date (Note) -
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Abstract
A base station apparatus is capable of adjusting antenna gains in a horizontal direction and a vertical direction of the plurality of antennas included in the base station apparatus, by adjusting a phase and an amplitude of a signal addressed and transmitted to a terminal apparatus, stores a codebook which is shared with the terminal apparatus and describes a plurality of linear filters associated with antenna gains in the horizontal direction and antenna gains in the vertical direction, acquires control information indicating at least one out of a plurality of linear filters described in the codebook, of which notification is sent from the terminal apparatus, performs precoding on the signal addressed to the terminal apparatus, based on the control information and the first codebook, and transmits the signal subjected to the precoding.
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