Patent ID: 9155072
Filing Date: 2015-10-06
Classification: H04B,H04L,H04W

Abstract:
1. A radio base station of an adaptive array scheme applying an antenna weight to a plurality of antennas, comprising: a control unit that sets a reference signal transmission frequency band available in a transmission of a reference signal from a serving radio terminal, the reference signal being referenced in a calculation of the antenna weight, wherein the control unit sets a first reference signal transmission frequency band that is used by the serving radio terminal for the transmission of the reference signal at a first time within a predetermined period and sets a second reference signal transmission frequency band that is used by the serving radio terminal for the transmission of the reference signal at a second time within the predetermined period when the reference signal transmission frequency band is narrower than a frequency band that can be assigned to the serving radio terminal, and in a circumstance where a transmission frequency band assigned to the serving radio terminal is not included in a frequency band of a currently received reference signal, the control unit responds by calculating the antenna weight for the serving radio terminal based on a received most recently reference signal including the transmission frequency band.