Transmitter to transmit data used by the Orthogonal Frequency Division Multiplexing, OFDM, including the transmitter a data processing apparatus (76) that can be operated to establish correspondence of input symbols, which are to be communicated, on a number predetermined carrier signals of a symbol Multiplexed by Orthogonal Frequency Division OFDM, according to a plurality of different modes of operation, each of which provides a different number of OFDM carriers, the data processing apparatus (76) comprising a Interleaving memory (100) that can be operated to write the predetermined number of data symbols for mapping on OFDM carrier signals, and for reading data symbols for OFDM carriers for the purpose of mapping , the reading being done in a different order from the writing, determining the order from a set of addresses, with the result that the data symbols are embedded in the carrier signals, an address generator (102) that can be operated to generate the set of addresses, generating an address for each of the input symbols in order to indicate one of the carrier signals on which the correspondence of the data symbol is to be established, the address generator (102) comprising a shift register with linear feedback (200.1, 200.2 , 200.3) that includes a predetermined number of recording stages, and that can be operated to generate a pseudo-random sequence of bits according to a generating polynomial, a permutation circuit (210.0, 210.2, 210.3) that can be operated to receive the contents of the stages of the shift register, and to permute the bits present in the stages of the register according to a perm order utation in order to form an address of one of the OFDM carriers, and a control unit (224.1, 224.2, 224.3) that can be operated in combination with an address checking circuit (216.1, 216.2, 216.3) to return to generate an address when a generated address exceeds the predetermined number of carriers, characterized in that the transmitter can be switched between operating modes 2k, 4k and 8k, and because for 4k mode the default number of OFDM carrier signals is a maximum of four thousand ninety-six, the displacement register with linear feedback (200.1, 200.2, 200.3) presents eleven stages of registration with a generator polynomial for the displacement register with linear feedback of Ri (10) = Ri-1 (0) ⊕ Ri-1 (2), and the permutation order forms an eleven bit address Ri (n) for the ith data symbol from the bit present in the nth register stage R i (n) according to the t abla: Ri (n) for n = 9 8 7 6 5 4 3 2 1 0 Ri (n) for n = 7 10 5 8 1 2 4 9 0 3 6