Method for improving the hf band link establishment using a broadband capability

A method for improving the HF band link establishment in a communication system including one or more transmit terminals or calling terminals and one or more receive terminals or called terminals, at least one of the calling or called terminals having a broadband capability, comprising at least the following steps:

• creating call bands and listening bands according to the broadband transmit and/or receive capabilities, the number of frequencies being known, the minimum number of bands being suitable for covering the entire frequency plan,
• minimising the number of bands and then maximising the number of frequencies in each of these bands Bi of size B,
• distributing the bands Bi regularly in time in order to minimise the intermediate listening time between two frequencies, at available temporal positions close to a regular subdivision, and allocating a frequency fj to each band Bi in order to define a standard frequency plan for the operation of the system,
• transmitting/receiving in broadband mode, by checking that the selected transmit frequencies are not already in use.