Patent ID: 8750934

Claim:
A system for communications between at least two telecommunications devices, at least one of these devices being onboard an aircraft, said devices comprising means for sending and/or receiving digital data, said data being classed in at least two categories, the first category corresponding to critical data, the second category corresponding to non-critical data, wherein the data are sent on M antennas and received on N antennas, a matrix H of dimension M×N representative of the multi-antenna propagation channel being estimated, the data being sent according to a mode of transmission selected from among at least two multi-antenna modes, a first robust mode using a scheme of Alamouti type, a second high-speed mode using a scheme of BLAST type, the critical data being transmitted using the robust mode, the non-critical data being transmitted using one of the two multi-antenna modes, the high-speed mode being selected when the rank RH of the matrix H exceeds a previously chosen threshold value SR.