A method (MET_TA) for composing a transmit signal, said method comprising the step (M1/1) of composing said transmit signal characterized by: - comprising in a first fraction of a frequency range of a first radio resource element (RRE2, RRE5, RRE7) a first fraction of a first reference signal superimposed with a data signal (DS2, DS5, DS6), in a first fraction of a frequency range of at least a second radio resource element at least a second fraction of said first reference signal, in at least a second fraction of said frequency range of said first radio resource element (RRE2, RRE5, RRE7) a first fraction of at least a second reference signal (P2, P3, P4) superimposed with said data signal (DS2, DS5, DS6) and in at least a second fraction of said frequency range of said at least second radio resource element at least second fraction of said at least second reference signal (P2, P3, P4), wherein said first and said at least second fraction of said first radio resource element and said at least second radio resource element are non-overlapping and tangent, and wherein a frequency bandwidth of said first and said at least second fractions of said first and said at least second reference signal (P1, P2, P3, P3) is equal to or smaller than a frequency bandwidth of said first and said at least second radio resource element (RRE2, RRE5, RRE6, RRE7) divided by said number of said first and said at least second reference signal (P1, P2, P3, P4) superimposed to said data signal (DS2, DS5, DS6); or by - comprising in a first fraction of a time range of a first radio resource element (RRE2, RRE5, RRE7) a first fraction of a first reference signal superimposed with a data signal (DS2, DS5, DS6), in a first fraction of a time range of at least a second radio resource element at least a second fraction of said first reference signal, in at least a second fraction of said time range of said first radio resource element (RRE2, RRE5, RRE7) a first fraction of at least a second reference signal (P2, P3, P4) superimposed with said data signal (DS2, DS5, DS6) and in at least a second fraction of said time range of said at least second radio resource element at least a second fraction of said at least second reference signal (P2, P3, P4), wherein said first and said at least second fraction of said first radio resource element and said at least second radio resource element are non-overlapping and tangent, and wherein a time range of said first and said at least second fractions of said first and said at least second reference signal (P1, P2, P3, P3) is equal to or smaller than a time range of said first and said at least second radio resource element (RRE2, RRE5, RRE6, RRE7) divided by said number of said first and said at least second reference signal (P1, P2, P3, P4) superimposed to said data signal (DS2, DS5, DS6). - comprising in a first fraction of a frequency range of a first radio resource element (RRE2, RRE5, RRE7) a first fraction of a first reference signal superimposed with a data signal (DS2, DS5, DS6), in a first fraction of a frequency range of at least a second radio resource element at least a second fraction of said first reference signal, in at least a second fraction of said frequency range of said first radio resource element (RRE2, RRE5, RRE7) a first fraction of at least a second reference signal (P2, P3, P4) superimposed with said data signal (DS2, DS5, DS6) and in at least a second fraction of said frequency range of said at least second radio resource element at least second fraction of said at least second reference signal (P2, P3, P4), wherein said first and said at least second fraction of said first radio resource element and said at least second radio resource element are non-overlapping and tangent, and wherein a frequency bandwidth of said first and said at least second fractions of said first and said at least second reference signal (P1, P2, P3, P3) is equal to or smaller than a frequency bandwidth of said first and said at least second radio resource element (RRE2, RRE5, RRE6, RRE7) divided by said number of said first and said at least second reference signal (P1, P2, P3, P4) superimposed to said data signal (DS2, DS5, DS6); - comprising in a first fraction of a time range of a first radio resource element (RRE2, RRE5, RRE7) a first fraction of a first reference signal superimposed with a data signal (DS2, DS5, DS6), in a first fraction of a time range of at least a second radio resource element at least a second fraction of said first reference signal, in at least a second fraction of said time range of said first radio resource element (RRE2, RRE5, RRE7) a first fraction of at least a second reference signal (P2, P3, P4) superimposed with said data signal (DS2, DS5, DS6) and in at least a second fraction of said time range of said at least second radio resource element at least a second fraction of said at least second reference signal (P2, P3, P4), wherein said first and said at least second fraction of said first radio resource element and said at least second radio resource element are non-overlapping and tangent, and wherein a time range of said first and said at least second fractions of said first and said at least second reference signal (P1, P2, P3, P3) is equal to or smaller than a time range of said first and said at least second radio resource element (RRE2, RRE5, RRE6, RRE7) divided by said number of said first and said at least second reference signal (P1, P2, P3, P4) superimposed to said data signal (DS2, DS5, DS6).