MIMO-FBMC transmitter for transmitting a plurality U of data streams on a transmission channel using a plurality N T of transmission antennas characterised in that it comprises: - a plurality U of OQAM modulators (510 1,...,510 u) associated with the U data streams, each modulator receiving a stream data vector and supplying a vector of N alternating real and imaginary components for N sub-channels; - a plurality U of filtering and spectral spreading modules (520 1,...,520 U) associated with the U modulators, each filtering and spectral spreading module spreading each component over 2 K -1 adjacent sub-carriers and filtering them using the prototype filter transfer function, where K is the overlap factor, in order to supply KN spread and filtered components; - a plurality KN of linear precoders, (525 1,...,520 KN), associated respectively with the KN sub-carriers, each linear precoder multiplying the spread and filtered components relating to a sub-carrier ( j) by a precoding matrix ( P j) in order to supply a plurality KN of precoded vectors; - a plurality ( N T,N B) of IFFT modules (530 1,...,530 NT) each receiving elements with the same index as the precoded vectors, where each IFFT module supplies a time signal which represents an FBMC symbol; - a plurality ( N T,N B) of FBMC symbol combination modules in the time domain (540 1,...,540 NT), associated respectively with the IFFT modules in order to supply combined time signals; - a plurality ( N T, N B) of modules for translation of frequency to RF band to generate, from said combined time signals, a plurality N T of antenna signals destined to be transmitted by said transmission antennas; said plurality of IFFT modules, said plurality of FBMC symbol combination modules and said plurality of translation to RF band modules being all equal to the plurality N B of beams, said combined time signals translated to RF band by said modules for translation to RF band (920 1,...,920 NB) each being multiplied by a phase-shift vector (920 1,...,920 NB), the antenna signals being generated by summing (940 1,...,940 NT) the components of the vectors thus obtained. - a plurality U of OQAM modulators (510 1,...,510 u) associated with the U data streams, each modulator receiving a stream data vector and supplying a vector of N alternating real and imaginary components for N sub-channels; - a plurality U of filtering and spectral spreading modules (520 1,...,520 U) associated with the U modulators, each filtering and spectral spreading module spreading each component over 2 K -1 adjacent sub-carriers and filtering them using the prototype filter transfer function, where K is the overlap factor, in order to supply KN spread and filtered components; - a plurality KN of linear precoders, (525 1,...,520 KN), associated respectively with the KN sub-carriers, each linear precoder multiplying the spread and filtered components relating to a sub-carrier ( j) by a precoding matrix ( P j) in order to supply a plurality KN of precoded vectors; - a plurality ( N T,N B) of IFFT modules (530 1,...,530 NT) each receiving elements with the same index as the precoded vectors, where each IFFT module supplies a time signal which represents an FBMC symbol; - a plurality ( N T,N B) of FBMC symbol combination modules in the time domain (540 1,...,540 NT), associated respectively with the IFFT modules in order to supply combined time signals; - a plurality ( N T, N B) of modules for translation of frequency to RF band to generate, from said combined time signals, a plurality N T of antenna signals destined to be transmitted by said transmission antennas;