INFORMATION TRANSFER FROM TELECOMMUNICATION CONTROL UNITS TO COMPENSATORS WITH TIME-KEYING TRANSMIT/RECEIVE SWITCHING SIGNALS
Methods, systems, and computer programs are presented for time-keying a transmit/receive switching signal. One method includes an operation for receiving, by a compensator, an input signal comprising a pilot tone signal and an operating signal. Further, the method includes operations for detecting a transmit period based on the pilot tone signal, and measuring a pilot tone gap within the transmit period where the pilot tone signal is off. The method further includes generating an internal transmit-on signal based on the pilot tone signal. The internal transmit-on signal is active during the pilot tone gap to keep the compensator in transmit mode during the pilot tone gap. Further, the output power level of the compensator is adjusted based on the pilot tone gap.
1 . A method comprising:
receiving, by a compensator, an input signal comprising a pilot tone signal and an operating signal;
detecting a transmit period based on the pilot tone signal;
measuring a pilot tone gap within the transmit period where the pilot tone signal is off;
generating an internal transmit-on signal based on the pilot tone signal, the internal transmit-on signal being active during the pilot tone gap to keep the compensator in transmit mode during the pilot tone gap; and
adjusting an output power level of the compensator based on the pilot tone gap.
2 . The method as recited in claim 1 , wherein a duration of the pilot tone gap is proportional to the output power level requested from the compensator.
3 . The method as recited in claim 1 , wherein the pilot tone gap is measured by a timer in the compensator, wherein an input power received by the compensator is measured by a measuring unit in the compensator, wherein the internal transmit-on signal is generated by a reconstructor in the compensator.
4 . The method as recited in claim 3 , wherein a comparator in the compensator regulates the output power level based on the input power measured by the measuring unit and a requested output power based on a duration of the pilot tone gap.
5 . The method as recited in claim 4 , wherein an output signal from the comparator is sent to a low pass filter that is part of a power-control loop used to adjust an output of an attenuator in a transmit/receive path.
6 . The method as recited in claim 1 , wherein a maximum duration of the pilot tone gap is less than a duration of a shortest possible transmit frame.
7 . The method as recited in claim 1 , further comprising:
detecting a first subgap and a second subgap, within the pilot tone gap, separated by a period where the pilot tone signal is on; and
detecting an error in transmission based on the durations of the first subgap and the second subgap being different by a value that exceeds a predetermined threshold.
8 . The method as recited in claim 7 , wherein the first subgap and the second subgap are measured by a timer in a control unit of the compensator in real time.
9 . The method as recited in claim 1 , wherein the compensator comprises a vehicle-to-everything (V2X) communication compensator or a cellular to V2X compensator.
10 . The method as recited in claim 1 , wherein the input signal further comprises a direct current (DC) phantom supply, wherein the pilot tone signal has a frequency of 125 megahertz, wherein the operating signal has a frequency of 5.9 gigahertz.
11 . A compensator comprising:
a signal splitter configured to receive an input signal comprising a pilot tone signal and an operating signal;
a receive/transmit configured to detect a transmit period based on the pilot tone signal;
a timer configured to measure a pilot tone gap within the transmit period where the pilot tone signal is off;
a reconstructor configured to generate an internal transmit-on signal based on the pilot tone signal, the internal transmit-on signal being active during the pilot tone gap to keep the compensator in transmit mode during the pilot tone gap; and
a comparator configured to adjust an output power level of the compensator based on the pilot tone gap.
12 . The compensator as recited in claim 11 , wherein a duration of the pilot tone gap is proportional to the output power level requested from the compensator.
13 . The compensator as recited in claim 11 , further comprising:
a measuring unit configured for measuring an input power received by the compensator.
14 . The compensator as recited in claim 13 , wherein the comparator regulates the output power level based on an input power measured by the measuring unit and a requested output power based on a duration of the pilot tone gap.
15 . The compensator as recited in claim 11 , further comprising:
a low pass filter configured to receive an output signal from the comparator, the low pass filter being part of a power-control loop used to adjust an output of an attenuator in a transmit/receive path.
16 . The compensator as recited in claim 11 , wherein a maximum duration of the pilot tone gap is less than a duration of a shortest possible transmit frame.
17 . The compensator as recited in claim 11 , wherein the comparator is configured for:
detecting a first subgap and a second subgap, within the pilot tone gap, separated by a period where the pilot tone signal is on; and
detecting an error in transmission based on the durations of the first subgap and the second subgap being different by a value that exceeds a predetermined threshold.
18 . The compensator as recited in claim 17 , wherein the first subgap and the second subgap are measured by a timer in a control unit of the compensator in real time.
19 . The compensator as recited in claim 11 , wherein the compensator comprises a vehicle-to-everything (V2X) communication compensator or a cellular to V2X compensator.
20 . The compensator as recited in claim 11 , wherein the input signal further comprises a direct current (DC) phantom supply, wherein the pilot tone signal has a frequency of 125 megahertz, wherein the operating signal has a frequency of 5.9 gigahertz.