A method for transmitting a beamformed data transmission transmitted from a radio base station to a user equipment over an unlicensed band in a mobile communication system, wherein the data transmission is transmitted by the radio base station within one or more resource blocks of a subframe where each resource block is composed of a plurality of resource elements, wherein the beamformed data transmission is generated by the radio base station by: applying a first precoding for generating a beam directionality towards the user equipment to a subset of all the resource elements used for transmitting the data transmission in the subframe, applying a second precoding, different from the first precoding, to the remaining resource elements used for transmitting the data transmission in the subframe so as to achieve a radiation pattern different from the beam directionality towards the user equipment, and characterized in that the subset of resource elements to which the first precoding is applied is composed of one or more resource elements of each resource block used for transmitting the data transmission in the subframe, and the remaining resource elements to which the second precoding is applied are composed of the remaining resource elements of each resource block used for transmitting the data transmission in the subframe, wherein the subset of resource elements to which the first precoding is applied is such that particular subcarriers of each resource block in the subframe are not included, and wherein the remaining resource elements of each resource block are composed of one or more resource elements of one or more OFDM, Orthogonal Frequency-Division Multiplexing, symbols that do not comprise resource elements used for transmitting a cell-specific reference signal with an omni-directional or sectorized radiation pattern. applying a first precoding for generating a beam directionality towards the user equipment to a subset of all the resource elements used for transmitting the data transmission in the subframe, applying a second precoding, different from the first precoding, to the remaining resource elements used for transmitting the data transmission in the subframe so as to achieve a radiation pattern different from the beam directionality towards the user equipment, and characterized in that the subset of resource elements to which the first precoding is applied is composed of one or more resource elements of each resource block used for transmitting the data transmission in the subframe, and the remaining resource elements to which the second precoding is applied are composed of the remaining resource elements of each resource block used for transmitting the data transmission in the subframe, wherein the subset of resource elements to which the first precoding is applied is such that particular subcarriers of each resource block in the subframe are not included, and wherein the remaining resource elements of each resource block are composed of one or more resource elements of one or more OFDM, Orthogonal Frequency-Division Multiplexing, symbols that do not comprise resource elements used for transmitting a cell-specific reference signal with an omni-directional or sectorized radiation pattern.