Array antenna system and weighting control technique used in array antenna system

摘要

An array antenna system comprises an array antenna unit including multiple antenna elements and multiple phase shifters for setting weighting coefficients of the associated antenna elements; and a weight controller that generates and outputs 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. The weight controller has a channel impulse response estimation unit that estimates 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 that outputs the control signal based on the estimated channel impulse responses.