| 摘要 |
An optical subscriber system according to the present invention has an adaptive antenna having a plurality of antenna elements, for controlling the weighting on the antenna elements thereby to radiate beams that are adapted to radio wave environments, a position estimator for estimating the position of a mobile unit, a beam combiner for weighting signals received from the mobile unit by the antenna elements and combining beams, and a weighting coefficient generator for correcting weighting coefficients adapted to radio wave environments, which give initial weights as weights to form nulls in bearings other than the mobile unit based on the position of the mobile unit which has been estimated by the position estimator, for thereby reducing a time required for convergence.
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