the ns doa estimators 50 have been replaced with a single doa estimator 50 in doa estimation operation executed in the first time slot of each reception frame the controller 9 outputs ns pulses 4 pulses in this example as a slot sync signal ss u2032 at such an interval as enables the doa estimator 50 to form an doa estimation by using a subarray 39 s worth of signals responsively the ns by ne i e ns sets of ne frequency converted base band signals are selected by the subarray selector 42 and output in four times in other words ne signals of a selected subarray is passed at a time to the doa estimator 50 in response to each of ns pulses of the ss u2032 signal in response to each ss u2032 pulse the doa estimator 50 uses the received ne signals for the doa estimation this arrangement reduces the complexity of the antenna control system 3 c though the reduced number of signals is used for the doa estimation the full ns by ne base band signals are used for actual communications this enables the array antenna 10 a to have a sharp directivity permitting power saved communications without influencing on other base stations or other ones than the mobile telephone with which the base station incorporating the antenna control system 3 c is currently communicating fig1 is a schematic diagram showing an exemplary arrangement of an antenna control system 3 d provided with an array antenna dedicated to the direction of arrival estimation in accordance with a fifth illustrative embodiment of the invention in.