METHOD AND DEVICE FOR SIMULTANEOUS RF TRANSMISSION OF A SET OF MESSAGES FROM A PLURALITY OF INDEPENDENT SENDERS TO A SINGLE RECEIVER COMPRISING A PLURALITY OF ANTENNAS

摘要

The invention relates to a method of simultaneous RF transmission of a set of messages from a plurality of N senders to a single receiver comprising a plurality of M antennas such that M is greater than or equal to N1 characterized in that it comprises steps consisting in: at the level of each sender: decomposing (1) each message into at least two submessages, the submessages being such that their linear combination gives the original message and that their scalar product gives the null signal; modulating (2) with the aid of each submessage of a message, a corresponding subcarrier, the frequencies of the subcarriers being common from one message to another, and sending the signals of the submessages thus carried in subchannels, by means of suitably adapted electromagnetic antennas; at the level of each receiving antenna: operating (3) a change of frequency of the signal received so as to obtain a set of signals received in base band, linear combinations of the various submessages; digitizing (4) in a synchronous manner the set of base band signals provided by the set of receivers, so as to obtain a set of digitized signals of the set of receiving antennas; digitally processing (5) said set of digitized signals with the aid of an algorithm able to construct estimations of the separating matrices associated with the subchannels of transmissions specific to the submessages, so as to obtain estimations of the separating matrices associated with the subchannels specific to the submessages.