Patent ID: 8275337
Filing Date: 2012-09-25
Classification: H01Q,H04B

Abstract:
1. An adaptive array wireless communication apparatus having an array antenna configured by a plurality of antenna elements, comprising an array weight generating unit generating weight coefficients for received signals received at the plurality of antenna elements, an antenna element determining unit determining antenna elements used for transmission/reception based on the weight coefficients generated at the array weight generating unit, a weighting unit weighting each received signal or/and each transmission signal of the antenna elements determined by the antenna element determining unit, a directionality controlling unit controlling the directionality of the array antenna by the weighting by the weighting unit, and a controlling unit of an antenna element determination period controlling the antenna element determining unit so that the determination of the antenna element is intermittently carried out, and adjusting the period of determination at the antenna element determining unit based on information of the antenna elements determined by the antenna element determining unit, wherein the controlling unit of the antenna element determination period calculates the inner product of a present array weight vector in an antenna elements determined by the antenna element determining unit and a previous array weight vector and controls the antenna element determining unit so that all antenna elements are used at the next generation of weight coefficients when the inner product is smaller than a threshold value.