Method and apparatus for beam forming adapted random perturbation in the mobile communication system

The present invention relates to a method of setting an analog beam forming coefficient and a device for supporting the same. A method for controlling an antenna in a base station according to an embodiment of the present invention is configured to comprise the steps of measuring an n-th received signal strength with respect to an n-th phase of at least one received antenna; measuring an n+1 th received signal strength with respect to an n+1 th phase to randomly change the n phase forward or backward; and comparing the received signal strength to set the beam forming coefficient to the phase having the maximum received signal strength. According to the present invention, the method enables to set the beam forming coefficient suitable for general cellular environments using multiple analog array antennas without an overhead associated with channel estimation.