Frequency management system

DETAILED DESCRIPTION OF THE EMBODIMENT Before going into a detailed description of the figures a brief overview will be given describing the environment and general features of the system.
The operational situation typically assumes a network of HF radio users generally structured using a net controlling station in association with a plurality of widely scattered controlled stations, including relay stations.
Each controlled net station is expected to continuously monitor the net traffic and to respond if polled by the controlling net station.
Only one station at a time would then be transmitting, with transmit discipline being maintained by the controlling station.
Centralized frequency management and control, with full frequency assignment authority would normally be the responsibility of the controlling station, within the single-net or the multi-net configuration.
Operational configurations, however, using one-way transmissions only, utilize the capability of the present invention to assign the selection of optimal HF frequencies to the controlled terminal.
The system according to the invention, can be used for the real-time management of HF communication networks having one controlling station and one or more controlled (or remote) stations.
The system is adapted to provide a frequency management capability for any predetermined number of frequencies.
Practical considerations show that generally, a number of from about 50 to about 150 frequencies provides a suitable system, depending on the conditions of use and the required speed and reliability.
The operating sub-bands are chosen to have an adequate width for accomodating the predetermined number of frequencies, with an adequate spacing between the frequencies used.
In the following, the invention is illustrated in an entirely arbitrary manner with reference to a system of 125 channels.
It ought to be understood that this is by way of example only, and that any reasonable and practical number of channels can be managed by such systems