| 摘要 |
A method and system of communication in a wide band high frequency HF communication system is disclosed. The system includes at least n communication channels, an interleaver common to the n communication channels, a means for determining the quality of communication of each of the n communication channels. At least the following information is introduced into the structure of the frame of the data at the level of an autobaud: an item of information about the modulation employed on each of the n communication channels chn, an item of information about the interlever common to the n communication channels, the corrector code FEC employed, the number of communication channels employed (n) as well as for each one its identifier idn. The modulation is chosen on channel n, a common coding and interleaving are operated on the n channels, and the information introduced in the shared autobaud is transmitted. |
| 主权项 |
1. 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, the system determining a communication quality Qn from measured signals provided by each of the n communication channels chn, data being transmitted in a form of a frame comprising an initial synchronization preamble and a standard autobaud followed by a block of data, wherein the method allows a 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 information pertaining to coding, interleaving, and modulation by channel, the method comprising:
introducing, into a 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, andthe 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 a basis of a link quality of said communication channel, operating a common coding and interleaving on the n communication channels, and transmitting the information introduced into a shared autobaud at the receiver. |
