Method and system of communication using dynamic modulation and coding schemes on wide band hf communication channels

A method for communication in a wideband high frequency HF communication system comprising a transmitter for an HF signal and a receiver, at least n communication channels chn, an FEC error correction code and an interleaver that are common to the n communication channels, a means for determining the communication quality Qn provided by each of the n communication channels chn, the data being transmitted in the form of a frame comprising an initial synchronization preamble and a standard autobaud followed by a block of data, wherein the method allows the use of n channels in parallel, sharing one and the same coder and one and the same interleaver to benefit from frequency diversity protection, while allowing use of different modulations on the n communication channels and providing redundancy on the information pertaining to coding, interleaving, modulation by channel, the method comprising:

• introducing, into the frame of the data in the transmitted HF signal, an autobaud extension preamble after the standard autobaud, said extension preamble having at least the following information:
• a piece of information about the modulation used on each of the n communication channels chn,
• a piece of information about the interleaver that is common to the n communication channels,
• the FEC correction code used, which is common to the n communication channels, and
• the number of communication channels used (n), and for each identifier idn thereof that allows them to be ordered,
• choosing the modulation on a communication channel n on the basis of the link quality of said communication channel,
• operating a common coding and interleaving on the n communication channels, and
• transmitting the information introduced into the shared autobaud at the receiver.