A method for transmitting data using a Space Frequency Block Code, SFBC, scheme for four transmission antennas, the method comprising the steps of: modulating data into a plurality of modulated symbols; and transmitting the plurality of modulated symbols through a plurality of frequency sub-carriers via the four transmission antennas based on an 4X4 output matrix, wherein the output matrix is generated by exchanging a second row and a third row of a combined SFBC + Frequency Switched Transmit Diversity, FSTD, scheme transmit matrix such that a first symbol and the conjugate of the first symbol are transmitted through a first frequency sub-carrier via a first antenna and a second frequency sub-carrier via a third antenna respectively, that a third symbol and the conjugate of the third symbol are transmitted through a third frequency sub-carrier via a second antenna and a fourth frequency sub-carrier via a fourth antenna respectively and that either the negative conjugate of a second symbol and the second symbol are transmitted through the second frequency sub-carrier via the first antenna and the first frequency sub-carrier via the third antenna respectively, with the negative conjugate of a fourth symbol and the fourth symbol being transmitted through the fourth frequency sub-carrier via the second antenna and the third frequency sub-carrier via the fourth antenna respectively, or that the negative conjugate of the second symbol and the second symbol are transmitted through the first frequency sub-carrier via the third antenna and the second frequency sub-carrier via the first antenna respectively, with the negative conjugate of the fourth symbol and the fourth symbol being transmitted through the third frequency sub-carrier via the fourth antenna and the fourth frequency sub-carrier via the second antenna respectively, the first to fourth rows of the output matrix are associated with the transmission antennas respectively and the first to fourth columns of the output matrix are associated with the frequency sub-carriers respectively; zero symbols are mapped to remaining elements except elements of the output matrix to which the first to fourth symbols are mapped; and using the generated output matrix for evening out a disparity of a density of pilot symbols. modulating data into a plurality of modulated symbols; and transmitting the plurality of modulated symbols through a plurality of frequency sub-carriers via the four transmission antennas based on an 4X4 output matrix, wherein the output matrix is generated by exchanging a second row and a third row of a combined SFBC + Frequency Switched Transmit Diversity, FSTD, scheme transmit matrix such that a first symbol and the conjugate of the first symbol are transmitted through a first frequency sub-carrier via a first antenna and a second frequency sub-carrier via a third antenna respectively, that a third symbol and the conjugate of the third symbol are transmitted through a third frequency sub-carrier via a second antenna and a fourth frequency sub-carrier via a fourth antenna respectively and that either the negative conjugate of a second symbol and the second symbol are transmitted through the second frequency sub-carrier via the first antenna and the first frequency sub-carrier via the third antenna respectively, with the negative conjugate of a fourth symbol and the fourth symbol being transmitted through the fourth frequency sub-carrier via the second antenna and the third frequency sub-carrier via the fourth antenna respectively, or that the negative conjugate of the second symbol and the second symbol are transmitted through the first frequency sub-carrier via the third antenna and the second frequency sub-carrier via the first antenna respectively, with the negative conjugate of the fourth symbol and the fourth symbol being transmitted through the third frequency sub-carrier via the fourth antenna and the fourth frequency sub-carrier via the second antenna respectively, the first to fourth rows of the output matrix are associated with the transmission antennas respectively and the first to fourth columns of the output matrix are associated with the frequency sub-carriers respectively; zero symbols are mapped to remaining elements except elements of the output matrix to which the first to fourth symbols are mapped; and using the generated output matrix for evening out a disparity of a density of pilot symbols.