Patent ID: 11898440
Assignee: RAPTOR DATA LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E  G  H | IPC E  G  H

Claim 10:
11. An apparatus for determining a suitability of a frequency band for data communication with a node by way of a communication channel, the apparatus comprising:
a receiver;
a transmitter; and
processing circuitry communicatively coupled to the receiver and the transmitter, the processing circuitry being configured to cause the transmitter to transmit to the node, by way of the communication channel, first and second signals each comprising frequencies in the said frequency band, the first signal comprising a calibration signal and the second signal comprising predetermined reference data, and wherein the receiver is configured to receive, by way of the communication channel, an indication from the node of the suitability of the frequency band for data communication with the node;
wherein the receiver is configured to receive the indication of the said suitability of the frequency band for data communication with the node by being configured to receive from the node, by way of the communication channel, third and fourth signals having frequencies within a respective frequency band, wherein the third signal comprises a calibration signal and the fourth signal contains the said indication of the suitability of the frequency band for data communication with the node by way of the communication channel; and
wherein the processing circuitry is configured to: determine a calibration function depending on the third signal; process the fourth signal depending on the calibration function; and determine the indication of the suitability of the frequency band for data communication with the node depending on the processed fourth signal.