Patent ID: 6559799
Filing Date: 2003-05-06
Classification: H01Q,H04B

Abstract:
An array antenna radio communication apparatus comprising:an array antenna that comprises a plurality of antenna elements; a generator that generates a known signal; a receiver that performs reception processing on signals received by the respective antenna elements and on said known signal; a calculator that, by using the known signal processed by said receiver, obtains an amount of correction to a phase rotation caused by said receiver; a recorder that records the amount of correction obtained by said calculator before commencement of communication; a measurer that, during communication, measures an error between the amount of correction obtained by said calculator before commencement of communication and an amount of correction obtained by said calculator during communication; and a renewer that, during communication, obtains a new amount of correction based on the error and renews the amount of correction recorded in said recorder with the new amount of correction, wherein: said generator makes the number of times the known signal is generated during communication smaller than the number of times the known signal is generated before commencement of communication.