A method for transmitting at least a group of Kd data samples in a radio signal to be transmitted over a communication system, said radio signal being intended to be emitted by an emitter comprising at least one transmission module configured for transmitting on at least a number of K different sub-carriers, K and Kd being strictly positive integers, Kd being strictly smaller than K, said radio signal being provided by: - determining a first position J1 and a second position J2 in a block of K samples (Ao;...; A K-1), such that the block of K samples comprises: ∘ Kd data samples to be transmitted; ∘ and K0 consecutive samples (A J1;...; A J2); ∘ with J 2 - J 1 + 1 = K 0 and Kd + K 0 = K; - applying a DFT-spread-OFDM-type scheme to the block of K samples A = (Ao;...; A K-1), and obtaining an output signal representing a symbol comprising N complex samples S n in the radio signal, with n = 0 to N-1; - determining, in the output signal, a first position T1 and a second position T2 based on J1, J2, K and N such that: ∘ T 2 - T1 = R, with R being a strictly positive integer; - setting, in the output signal, the values of the R complex samples (S T1;...; S T2) between the first position T1 and the second position T2 to zero to obtain an updated output signal; the method being characterized by: - inserting, between the first position T1 and the second position T2 of the updated output signal, S reference samples, S being a strictly positive integer and R = S + L, with L being a positive or null integer, to obtain a subsequent signal representing a hybrid symbol comprising: ∘ for each of n = [0; T1 - 1] ∪[ T 2 + 1; N - 1], a complex sample S n in the radio signal, the complex samples forming a data section of the hybrid symbol; ∘ for each of n = [T1 + L; T2], a reference sample RS n in the radio signal, the reference samples forming a reference section of the hybrid symbol; - appending, to the hybrid symbol, G samples forming a cyclic prefix of at least part of the hybrid symbol to obtain a signal representing the hybrid symbol appended with the cyclic prefix; in view of transmitting the radio signal corresponding to the signal representing the hybrid symbol appended with the cyclic prefix. - determining a first position J1 and a second position J2 in a block of K samples (Ao;...; A K-1), such that the block of K samples comprises: ∘ Kd data samples to be transmitted; ∘ and K0 consecutive samples (A J1;...; A J2); ∘ with J 2 - J 1 + 1 = K 0 and Kd + K 0 = K; ∘ Kd data samples to be transmitted; ∘ and K0 consecutive samples (A J1;...; A J2); ∘ with J 2 - J 1 + 1 = K 0 and Kd + K 0 = K; - applying a DFT-spread-OFDM-type scheme to the block of K samples A = (Ao;...; A K-1), and obtaining an output signal representing a symbol comprising N complex samples S n in the radio signal, with n = 0 to N-1; - determining, in the output signal, a first position T1 and a second position T2 based on J1, J2, K and N such that: ∘ T 2 - T1 = R, with R being a strictly positive integer; ∘ T 2 - T1 = R, with R being a strictly positive integer; - setting, in the output signal, the values of the R complex samples (S T1;...; S T2) between the first position T1 and the second position T2 to zero to obtain an updated output signal; - inserting, between the first position T1 and the second position T2 of the updated output signal, S reference samples, S being a strictly positive integer and R = S + L, with L being a positive or null integer, to obtain a subsequent signal representing a hybrid symbol comprising: ∘ for each of n = [0; T1 - 1] ∪[ T 2 + 1; N - 1], a complex sample S n in the radio signal, the complex samples forming a data section of the hybrid symbol; ∘ for each of n = [T1 + L; T2], a reference sample RS n in the radio signal, the reference samples forming a reference section of the hybrid symbol; ∘ for each of n = [0; T1 - 1] ∪[ T 2 + 1; N - 1], a complex sample S n in the radio signal, the complex samples forming a data section of the hybrid symbol; ∘ for each of n = [T1 + L; T2], a reference sample RS n in the radio signal, the reference samples forming a reference section of the hybrid symbol; - appending, to the hybrid symbol, G samples forming a cyclic prefix of at least part of the hybrid symbol to obtain a signal representing the hybrid symbol appended with the cyclic prefix; in view of transmitting the radio signal corresponding to the signal representing the hybrid symbol appended with the cyclic prefix.