Abstract: A resilient HF linking approach can include an HF transmitting device sending an HF connection request to an HF receiving device over an HF channel. Upon receiving an acknowledgement of the request, the HF transmitting device can transmit a predefined data load to the HF receiving device. The predefined data load can be known to the HF receiving device. The HF receiving device can use the predefined data load to estimate one or more parameters of the HF channel, and send estimates of the parameter(s) back to the transmitting device. The transmitting device can use the estimates of the one or more parameters to determine a data rate for use to transmit data to the receiving device aver the HF channel. The HF channel can be a wideband HF channel. The resilient HF linking approach allows of improvement of the performance and resilience of established HF links.

Abstract: A system may include a first full duplex split site system and a second full duplex split site system. The first full duplex split site system may include a first transmitter and a first receiver. The second full duplex split site system may include a second transmitter and a second receiver. The first transmitter may be configured to transmit a data payload to the second receiver via a high frequency (HF) link on a first frequency. The first receiver may be configured to: instruct the first transmitter to send a command to the second receiver to instruct the second transmitter to establish a maintenance link with the first receiver on a frequency different from the first frequency; and command the first transmitter to begin transmitting the data payload to the second receiver.

Abstract: A method includes monitoring, by a receiver of a first node, a portion of a spectrum. The method also includes receiving, by the receiver of the first node, a signal on a first frequency within a range of frequencies. The method additionally includes determining that the received signal is a link request from another node. The method further includes decoding a proposed link configuration from the link request. The proposed link configuration includes a proposed transaction frequency for a transaction to be sent to the first node from the other node. The proposed transaction frequency may be the same as or different from the first frequency. The method may also include determining, by a processor of the first node, whether the proposed link configuration is suitable. The method may additionally include receiving, by the receiver, at least one signal indicative of the transaction from the other node.