Method for transmitting data constituted by a series of symbols, which are referred to as current, to a receiver, said method involving the generation of NE OFDM signals with N f subcarriers that are respectively transmitted by NE transmission entities (EE i), NE>1, N f =2xNE, characterized in that it comprises the steps of: - generation of NE successions of N f /2 symbol couples from N f current symbols, comprising the substeps of: - collection of a set of quality indices for propagation channels between the NE transmission entities and the receiver, - generation (E2-1) of N ortho ≥1 orthogonal symbol couples ([y 2k, y 2k+1]) for a current symbol couple ([s 2k, s k2+1]), - generation (E2-2) of N duplic ≥1 replicas by means of duplication of said current symbol couple, - the total number of symbol couples generated in the generation steps being such that N ortho + N duplic + 1 = NE, - allocation (E2-3) of said current symbol couple, of the N ortho orthogonal symbol couples and of the N duplic replicas to the NE transmission entities, - selection of the allocation of an orthogonal symbol couple to a set of transmission entities for which those values of the quality indices from the collected set of quality indices are at a maximum or at a minimum, said substeps being iterated for the N f /2 symbol couples, - generation (E2-4) of the NE OFDM signals from the respective NE successions of N f /2 symbol couples such that for a succession of N f /2 symbol couples the N f successive symbols modulate the respective N f subcarriers. - generation of NE successions of N f /2 symbol couples from N f current symbols, comprising the substeps of: - collection of a set of quality indices for propagation channels between the NE transmission entities and the receiver, - generation (E2-1) of N ortho ≥1 orthogonal symbol couples ([y 2k, y 2k+1]) for a current symbol couple ([s 2k, s k2+1]), - generation (E2-2) of N duplic ≥1 replicas by means of duplication of said current symbol couple, - collection of a set of quality indices for propagation channels between the NE transmission entities and the receiver, - generation (E2-1) of N ortho ≥1 orthogonal symbol couples ([y 2k, y 2k+1]) for a current symbol couple ([s 2k, s k2+1]), - generation (E2-2) of N duplic ≥1 replicas by means of duplication of said current symbol couple, - the total number of symbol couples generated in the generation steps being such that N ortho + N duplic + 1 = NE, - allocation (E2-3) of said current symbol couple, of the N ortho orthogonal symbol couples and of the N duplic replicas to the NE transmission entities, - selection of the allocation of an orthogonal symbol couple to a set of transmission entities for which those values of the quality indices from the collected set of quality indices are at a maximum or at a minimum, - allocation (E2-3) of said current symbol couple, of the N ortho orthogonal symbol couples and of the N duplic replicas to the NE transmission entities, - selection of the allocation of an orthogonal symbol couple to a set of transmission entities for which those values of the quality indices from the collected set of quality indices are at a maximum or at a minimum, - generation (E2-4) of the NE OFDM signals from the respective NE successions of N f /2 symbol couples such that for a succession of N f /2 symbol couples the N f successive symbols modulate the respective N f subcarriers.