Patent ID: 8374132
Filing Date: 2013-02-12
Classification: H04B

Abstract:
1. A base station device which includes an array antenna, and which communicates with a plurality of mobile station devices including a first mobile station device and a second mobile station device in accordance with Space-Division Multiple Access scheme that uses the array antenna, the base station device comprising: a first weight calculator configured to calculate weight of each antenna element of the array antenna to be used in communications with the first mobile station device, by using a reference signal transmitted from the first mobile station device; a second weight calculator configured to calculate weight of each antenna element of the array antenna to be used in communications with the second mobile station device, so that null is directed to an arriving direction of the reference signal transmitted from the first mobile station device, wherein the second weight calculator determines the arriving direction of the reference signal transmitted from the first mobile station device on the basis of the weight calculated by the first weight calculator; an adaptive controller; and an antenna element number controller configured to control the number of antenna elements that receive a receiving wave, depending on whether the adaptive controller uses a spatial component suppressing type algorithm that suppresses spatial components in descending order of power among spatial components forming the receiving wave, wherein the adaptive controller uses the spatial component suppressing type algorithm when a ratio of a power level indicated by undesired wave power information to a power level indicated by desired wave power information is greater than a predetermined value, and the number of spatial components corresponds to the number of antenna elements that receive the receiving wave.