Abstract: A transmission method based on multiple antennas with directivity at the information level. In this transmission system, the directivity is introduced in the transmitted information by an optimization of the constellation's symbols only in the desired direction, keeping at same time an isotropic radiation power pattern by the antenna array The method allows the transmission of modulations with multilevel constellations based on M-QAM (M-ary Quadrature Amplitude Modulation) constellations, Voronoi constellations or M-PSK (M-ary Phase Shift Keying), using a decomposition of multilevel modulation into a sum of M? polar or BPSK (Binary-PSK) constellations that are amplified and transmitted by separate antennas. Therefore it uses up to M? parallel modulators, each one followed by an amplifier connected to an antenna. This transmission scheme transmits up to M? uncorrelated BPSK signals, that are added in the transmission channel to form a multilevel constellation.

Abstract: A transmission method based on multiple antennas with directivity at the information level. In this transmission system, the directivity is introduced in the transmitted information by an optimization of the constellation's symbols only in the desired direction, keeping at same time an isotropic radiation power pattern by the antenna array The method allows the transmission of modulations with multilevel constellations based on M-QAM (M-ary Quadrature Amplitude Modulation) constellations, Voronoi constellations or M-PSK (M-ary Phase Shift Keying), using a decomposition of multilevel modulation into a sum of M? polar or BPSK (Binary-PSK) constellations that are amplified and transmitted by separate antennas. Therefore it uses up to M? parallel modulators, each one followed by an amplifier connected to an antenna. This transmission scheme transmits up to M? uncorrelated BPSK signals, that are added in the transmission channel to form a multilevel constellation.