Patent ID: 7062273
Filing Date: 2006-06-13
Classification: H04B

Abstract:
1. A mobile communication terminal apparatus which communicates with either a first base station or a second base station and performs a handover from one to another of the base stations, the mobile communication terminal apparatus comprising: an array antenna which outputs a plurality of signals; a plurality of multipliers that multiply the signals output from the array antenna by weighting factors, and output multiplication result signals; a reception device configured to generate a reception signal based on the multiplication result signals output from the multipliers; a control device configured to perform a calculation for the weighting factors based on the reception signal, and adaptively control the multipliers by supplying the calculated weighting factors thereto; and an initial value calculating device configured to calculate at least one initial value for the weighting factors prior to the handover, wherein the control device starts the calculation for the weighting factors using the initial value when the handover is performed and the initial value calculating device includes: an estimation device configured to estimate an arrival direction of radio waves radiated from the second base station and arrived at the mobile communication terminal apparatus; and a storing device configured to store the initial value of the weighting factors that is calculated with regard to the arrival direction.