| 主权项 |
1. A method for adaptive communications in a High Frequency (HF) frequency band, comprising:
determining, at a receiver, a frequency band S that is available for a transmission by a transmitter in the HF band, depending on at least one of the following two criteria:
a number of frequencies allocated to a user included in the frequency band S according to a frequency allocation plan, anda physical availability of the frequency band S evaluated as a function of a prediction of an interference induced on a signal by reflections off ionospheric layers; selecting, dynamically at the receiver, in the frequency band S, a set of n frequency channels of identical width according to the frequency allocation plan and according to a quality score of a link of each of said n frequency allocation channels; determining, dynamically at the receiver, a number of frequency channels in the set of n frequency channels for which the quality score of the link is greater than a minimum threshold required for the transmission on the determined number of frequency channels, if said determined number of frequency channels having the quality score is less than a minimum number of the frequency channels required for the transmission, determining, dynamically in real time at the receiver, another available frequency band; and communicating, from the receiver, results of said determining the number of frequency channels to the transmitter for simultaneously transmitting on the determined number of frequency channels, a signal complying with an HF waveform, if the determined number of frequency channels is equal to or more than the minimum number of the frequency channels meeting the quality score. |
