Patent ID: 7126531

Claim:
An array antenna system comprising: an array antenna unit including a plurality of antenna elements and a plurality of phase shifters, each phase shifter being provided to one of the antenna elements to set a weighting coefficient for the associated antenna element; and a weight controller configured to generate and output a control signal for adjusting the weighting coefficient for each of the antenna elements, using a known signal received at each of the antenna elements and subjected to weighting and signal synthesis, the weight controller having a channel impulse response estimation unit configured to estimate a channel impulse response for each of the antenna elements based on a linear combination of a first received signal obtained from the known signal when a first set of weighting coefficients is set for the antenna elements and a second received signal obtained from the known signal when a second set of weighting coefficients is set for the antenna elements; and an output unit configured to output the control signal based on the estimated channel impulse response.