Mobile station, RF front-end module for mobile station, and front-end integrated circuit
A mobile station includes: a baseband processor; and an RF front-end module connected to the baseband processor and including a plurality of antenna modules and a controller. The plurality of antenna modules each include an antenna element and a variable phase shifter connected to the antenna element. The baseband processor is configured to output a beam control signal indicating a direction of an antenna beam formed by the plurality of antenna elements. The controller is configured to receive the beam control signal from the baseband processor, determine a phase control amount for each variable phase shifter on the basis of the beam control signal, and control each variable phase shifter on the basis of the determined phase control amount.
1. A mobile station comprising:
a baseband processor; and
an RF front-end module connected to the baseband processor and including a plurality of antenna modules and a controller, wherein
the plurality of antenna modules each include an antenna element and a variable phase shifter connected to the antenna element,
the baseband processor is configured to determine a direction of an antenna beam formed by the plurality of antenna elements and to output a beam control signal indicating the direction of the antenna beam to the controller, and
the controller is configured to receive the beam control signal from the baseband processor, determine a phase control amount for each variable phase shifter on the basis of the beam control signal, and output, to each variable phase shifter, a phase control signal based on the determined phase control amount.
2. The mobile station according to claim 1 , wherein the controller selects one or a plurality of antenna modules to be used for communication, from among the plurality of antenna modules, on the basis of the beam control signal, and controls the variable phase shifters of the one or the plurality of antenna modules.
3. The mobile station according to claim 1 , wherein the controller determines the phase control amount by referring to a table in which a direction of an antenna beam with a phase control amount for each variable phase shifter are associated with each other.
4. The mobile station according to claim 1 , wherein the RF front-end module receives the beam control signal by only one terminal.
5. The mobile station according to claim 1 , wherein the controller corrects the phase control amount by monitoring a phase of a signal transmitted or received by the antenna element.