Patent ID: 7242937
Filing Date: 2007-07-10
Classification: H04B

Abstract:
1. A method of operating 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 method comprising: outputting, by an array antenna, a plurality of signals; multiplying, by a plurality of multipliers, the signals output from the array antenna by weighting factors, and outputting multiplication result signals; generating, by a reception device, a reception signal based on the multiplication result signals output from the multipliers; performing, by a control device, a calculation for the weighting factors based on the reception signal, and adaptively controlling the multipliers by supplying the calculated weighting factors thereto; and calculating, by an initial value calculating device, at least one initial value for the weighting factors prior to the handover, wherein in said performing, the calculation for the weighting factors is started by the control device, using the initial value when the handover is performed and said calculating includes: estimating an arrival direction of radio waves radiated from the second base station and arrived at the mobile communication terminal apparatus; and storing the initial value of the weighting factors that is calculated with regard to the arrival direction.