Mobile communication terminal apparatus
AssigneeKabushiki Kaisha Toshiba
InventorShuichi Obayashi
Life of this patent
Estimating the term…
Abstract
A mobile communication terminal apparatus which performs radio communication with base stations using an adaptive array antenna which obtains an antenna output by multiplying output signals from the respective antenna elements of an array antenna by weighting factors using multipliers, and adding the resultant data using an adder estimates the arrival direction of radio waves from the base station, and starts adaptive control on the adaptive array antenna, at the time of handover from the one base station to the other base station, by using as initial values the weighting factors obtained in accordance with the arrival direction estimation result obtained prior to the handover.
Claims2
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.
2-19. (canceled)
Dependencies are inferred from the claim text.