Patent ID: 7340277
Filing Date: 2008-03-04
Classification: H01Q,H04B

Abstract:
1. A mobile unit communication apparatus remote from a mobile unit comprising: an adaptive antenna having a plurality of antenna elements to which weighting coefficients are applied to radiate beams that are adapted to radio wave environments; a position estimator which performs position calculations for estimating a position to which said mobile unit will move based on transmitted signals which do not contain position information from said mobile unit received by said antenna; a beam combiner for weighting said received signals and for combining beams; and a weighting coefficient generator which reduces a time required for convergence of the position calculations, wherein said weighting coefficient generator corrects weighting coefficients adapted to radio wave environments, which give initial weights to said received signals to form nulls in bearings other than said mobile unit based on the position of the mobile unit which has been estimated by said position estimator.