A transmission method and an FBMC transmitter to transmit at least a first and a second block of symbols (X0, X1), each symbols block including a temporal sequence of L vectors with predetermined size N. It uses a first and a second FBMC modulation channel, each FBMC modulation channel being associated with an antenna. During a first use of the channel, the vectors of the first block and the vectors of the second block are input to the first and to the second FBMC modulation channels respectively, in the order of the temporal sequence. During a second use of the channel, the vectors of the first and second blocks are multiplied by a factor jL 1 respectively and −(jL 1) input to the second and to the first FBMC modulation channels respectively, in the inverse order of the temporal sequence.