CN110149562A - Optical fiber single channel temporal frequency high-precision transmitting intermediate node device - Google Patents
Optical fiber single channel temporal frequency high-precision transmitting intermediate node device Download PDFInfo
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- CN110149562A CN110149562A CN201910318707.XA CN201910318707A CN110149562A CN 110149562 A CN110149562 A CN 110149562A CN 201910318707 A CN201910318707 A CN 201910318707A CN 110149562 A CN110149562 A CN 110149562A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0037—Operation
- H04Q2011/0045—Synchronisation
Abstract
The present invention provides a kind of optical fiber single channel temporal frequency high-precision transmitting intermediate node device, the single-channel intermediate node of optical fiber of local side and the communication of remote ground terminal is set, coupling detects second pulse signal and frequency signal that single-channel local side is sent to remote ground terminal, and remote ground terminal is sent to the second pulse signal and frequency signal of local side.Above-mentioned intermediate node device can accurately recover the frequency time signal of connection local side and the single-channel intermediate node of remote ground terminal.
Description
Technical field
The present invention relates to temporal frequency transmitting simultaneous techniques fields to be more specifically related to a kind of optical fiber single channel time
High-Accuracy Frequency transmits intermediate node device.
Background technique
In usual temporal frequency high-precision transmitting, the transmitting of time-ofday signals and the transmitting of frequency signal are carried out separately.
Pulse per second (PPS) transmitting, which synchronizes, accounts for a channel；Frequency signal transmitting accounts for two channels, and a channel is for transmitting local side to far
The frequency signal at end, one other channel is used to transmit the frequency signal that remote ground terminal returns to local side, to eliminate route Delay Variation
Influence.
Label of the second pulse signal as time-ofday signals is usually only used, therefore the accuracy of Time Transmission is difficult to improve,
It is generally difficult to more than 20ps.
In order to save channel resource, has second pulse signal, time-code are believed simultaneously using a wavelength channel in the prior art
Number and 10MHz signal transmitted, and realize that multi-site optical fiber time is synchronous with the mode of purifying regeneration using time division multiple acess
The method of transmission, specifically: the remote port of each website all has respectively only device address, and local side uses time division multiple acess
Mode is realized and is polled synchronization to each remote port, second pulse signal is synchronous for Time Transmission, and 10MHz signal is for interior
Portion keeps time module.
Compared with the above method synchronizes with pulse per second (PPS) transmitting and accounts for a channel, frequency signal transmitting accounts for the method for two channels,
Both the accuracy of pulse per second (PPS) transmitting and stability are almost the same, but the several orders of magnitude of penalty of Frequency Transfer, serious to damage
Hurt the short-term frequency stability of the atomic clock signal obtained.Therefore frequency signal generally only as Time Transmission system and device inside
Supplementary means uses, and does not export and uses to user.
Summary of the invention
In view of the above problems, connection local side and remote ground terminal single channel are accurately recovered the object of the present invention is to provide a kind of
Intermediate node frequency time signal optical fiber single channel temporal frequency high-precision transmitting intermediate node device, standard can be exported
Exactness can export up to ps grades, the time synchronizing signal of ps grades of Asia of shake and meet user demand, not reduce source microwave atomic clock
The frequency signal of index.
To achieve the goals above, optical fiber single channel temporal frequency high-precision transmitting intermediate node device of the present invention,
The single-channel intermediate node of optical fiber of local side and the communication of remote ground terminal is set, and the intermediate node device includes:
Signal detection demodulation module detects the second that single-channel local side is sent to remote ground terminal from the coupling of optical fiber single channel
Pulse signal and frequency signal, and remote ground terminal are sent to the second pulse signal and frequency signal of local side, will be from optical fiber single channel
Second pulse signal and frequency signal is demodulated in the carrier wave of modulation to be exported respectively to pulse per second (PPS) receiving processing module and down coversion mould
Block；
Multiple down conversion modules, the frequency signal of the local side that signal detection demodulation module is demodulated to remote ground terminal and remote
The crystal oscillator frequency signal that the frequency signal and crystal oscillator module of ground terminal to local side export carries out down coversion, is sent at signal acquisition
Manage control module；
Crystal oscillator module generates crystal oscillator frequency signal, is sent to down conversion module；Signal acquisition process control module will be passed through
Standard-frequency signal of the crystal oscillator frequency signal of processing as output, and it is sent to pulse per second (PPS) receiving processing module；
Signal acquisition process control module, A/D acquisition unit and D/A unit including multichannel, A/D acquisition unit are adopted
The frequency of frequency signal, crystal oscillator frequency signal and remote ground terminal to local side for collecting local side after down coversion to remote ground terminal is believed
Number, it obtains the relative phase between above-mentioned each signal, with the crystal oscillator frequency signal of D/A unit control crystal oscillator module output, makes crystal oscillator
Frequency signal phase is consistent with the phase for the frequency signal that remote ground terminal exports；
Pulse per second (PPS) receiving processing module, the second of the local side that reception identification signal detection demodulation module demodulates to remote ground terminal
The second pulse signal of pulse signal, remote ground terminal to local side measures the time interval between two second pulse signal rising edges, will
Being delayed when sending and receiving divided by 2 of remote ground terminal is deducted at this time interval, obtains optical fiber single channel intermediate node to remote ground terminal
The time delay value of signal one way transmitting, the second pulse signal of the local side received to remote ground terminal deduct intermediate node and remote ground terminal
After reception delay, in addition obtaining the pulse per second (PPS) letter of intermediate node after the time delay value that intermediate node is transmitted to remote ground end signal one way
Number be used as reference signal, from crystal oscillator module through signal acquisition process control module control output crystal oscillator frequency signal zero-crossing make
For multiple second pulse signals that rising edge generates, the second with the immediate second pulse signal of the reference signal as output is selected
Pulse signal.
Preferably, further includes:
Data receiver processing module, the data for receiving local side to remote ground terminal that signal detection demodulation module demodulates are believed
Number, remote ground terminal is received to local side data-signal, extracts the characteristic information of data-signal.
Preferably, the local side and remote ground terminal frequency of use signal and second pulse signal carry out time-ofday signals characterization, institute
It states second pulse signal and slightly marks use as the moment, the frequency signal phase finely marks use, the frequency as the moment
Signal phase and second pulse signal are kept fixed alignment relation, at the time of the moment slightly marks to be accurate to tens picoseconds
Signal label, signal marks at the time of the moment finely marks to be accurate to subpicosecond.
It is further preferred that the local side includes:
First timesharing module, so that local side timesharing in optical fiber single channel sends and receives second pulse signal and frequency letter
Number；
First signal synthesis modulation module, local side send period second pulse signal to be sent and frequency signal into
Row is modulated on single-channel carrier wave according to the instruction of the first timesharing module in different time to be sent to remote ground terminal；
First signal detection demodulation module receives the period in local side, demodulates far from the carrier wave that single channel is modulated
The second pulse signal sent and frequency signal are held, exports send processing module and the first down conversion module to pulse per second (PPS) respectively；
Pulse per second (PPS) sends processing module, obtains the time delay lead of second pulse signal, wherein pass through the first signal synthesis tune
Molding block sends initial second pulse signal to remote ground terminal, receives the first signal detection demodulation module of process that remote ground terminal is sent back to and demodulates
Second pulse signal, measure the time interval between two second pulse signal rising edges, by this time interval deduct local side and
Remote ground terminal delays the time delay value for obtaining that signal one way is transmitted in single channel divided by 2 when sending and receiving, along with the hair of local side
The reception delay of time delay and remote ground terminal is sent to send second pulse signal as next time delay lead；
First crystal oscillator module generates crystal oscillator frequency signal, is sent to the first down conversion module；The first signal acquisition will be passed through
The crystal oscillator frequency signal of processing and control module processing sends period frequency signal to be sent as local side, is sent to first
Signal synthesis modulation module；
Multiple first down conversion modules carry out down coversion to the standard-frequency signal of input, are sent to the first signal acquisition
Processing and control module；Down coversion is carried out to the crystal oscillator frequency signal that the first crystal oscillator module generates, and is sent to the first signal acquisition
Processing and control module；The frequency signal after the first signal detection demodulation module that remote ground terminal is returned carries out down coversion, hair
Give the first signal acquisition process control module；
First signal acquisition process control module, the first A/D acquisition unit and the first D/A unit including multichannel, the
Crystal oscillator frequency signal and standard-frequency signal and reception remote ground terminal of the one A/D acquisition unit acquisition after down coversion return
By the frequency signal of first signal detection demodulation module demodulation the first down conversion module down coversion, obtain between above-mentioned each signal
Relative phase, with D/A unit control the first crystal oscillator module output crystal oscillator frequency signal, make crystal oscillator frequency signal through single channel
Signal phase is consistent with the phase of standard-frequency signal after one way transmission.
Moreover it is preferred that the remote ground terminal includes:
Second timesharing module, so that remote ground terminal timesharing in optical fiber single channel sends and receives second pulse signal and frequency letter
Number；
Second signal detects demodulation module, terminates time receiving section in distant, demodulates a second arteries and veins from the carrier wave that single channel is modulated
Signal and frequency signal are rushed, is exported respectively to the second pulse per second (PPS) receiving processing module and the second down conversion module；
Second crystal oscillator module generates crystal oscillator frequency signal, is sent to the second down conversion module；It will be acquired by second signal
The frequency signal that the crystal oscillator frequency signal of processing and control module processing will be returned as the remote ground terminal transmission period, is sent to second
Signal synthesis modulation module；Crystal oscillator frequency signal by the processing of second signal acquisition process control module is fine as the moment
The standard-frequency signal of label exports, and is sent to pulse per second (PPS) receiving processing module；
Multiple second down conversion modules, to the frequency signal and the second crystal oscillator by second signal detection demodulation module demodulation
The crystal oscillator frequency signal of module output carries out down coversion, is sent to second signal acquisition process control module；
Second signal acquisition process control module, the 2nd A/D acquisition unit and the 2nd D/A unit including multichannel, the
Crystal oscillator frequency signal of the two A/D acquisition units acquisition after down coversion and the frequency by second signal detection demodulation module demodulation
Rate signal obtains the relative phase between above-mentioned crystal oscillator frequency signal and frequency signal, controls the second crystal oscillator mould with the 2nd D/A unit
The crystal oscillator frequency signal of block output makes the phase of the phase of the crystal oscillator frequency signal of output with the standard-frequency signal of input local side
Position is consistent；
Second pulse per second (PPS) receiving processing module receives local side and sends the second arteries and veins through second signal detection demodulation module demodulation
Signal is rushed, using the second pulse signal as the reference signal for generating second pulse signal, is believed from the second crystal oscillator module output frequency
Number rising edge of the zero crossing as pulse per second (PPS), generates multiple second pulse signals, selects from multiple pulses and the reference signal
Immediate pulse per second (PPS) is exported as the second pulse signal of remote ground terminal；
Second signal integrates modulation module, and end sends period second pulse signal to be sent, data encoding arteries and veins in distant
Signal and frequency signal is rushed to be modulated on single channel carrier wave in different time to local side hair according to the instruction of the second timesharing module
It sees off.
Preferably, the standard-frequency signal is sine wave signal, and the zero crossing of the sine wave signal and pulse per second (PPS) are believed
Number rising edge alignment, the frequency of the sine wave signal is integer.
Optical fiber single channel temporal frequency high-precision transmitting intermediate node device of the present invention is in local side and remote ground terminal
On the basis of single channel temporal frequency high-precision transmitting has been established in a fiber, the channel is coupled out in the intermediate node of optical fiber
Optical signal is demodulated by detection and obtains pulse per second (PPS) and frequency signal (sine wave letter that local end device is sent to remote ground end device
Number) and remote ground end device be sent to the second pulse signal and frequency signal (sine wave signal) of local end device, by further
Processing recovers correct time frequency signal in intermediate node, realizes in single channel temporal frequency high-precision transfer device sheet
It is synchronous that it is completed at the same time pulse per second (PPS), frequency, the accurate transfer of phase in ground terminal and one channel of intermediate node of remote ground terminal, both saved
Resource, and realize that split-second precision Frequency Transfer is synchronous.
Detailed description of the invention
Fig. 1 is the signal that optical fiber single channel temporal frequency high-precision transmitting intermediate node device of the present invention constitutes block diagram
Figure；
Fig. 2 is the schematic diagram that local side of the present invention constitutes block diagram；
Fig. 3 is the schematic diagram that remote ground terminal of the present invention constitutes block diagram.
Specific embodiment
In the following description, for purposes of illustration, it in order to provide the comprehensive understanding to one or more embodiments, explains
Many details are stated.It may be evident, however, that these embodiments can also be realized without these specific details.
Fig. 1 is that optical fiber single channel temporal frequency high-precision transmitting intermediate node device 10 of the present invention constitutes showing for block diagram
It is intended to, as shown in Figure 1, optical fiber single channel temporal frequency high-precision transmitting intermediate node device 10, is arranged in local side 20
With the single-channel intermediate node of optical fiber of remote ground terminal 30 communication, coupling detects single-channel local side 20 and is sent to remote ground terminal 30
Second pulse signal and frequency signal, and remote ground terminal 30 is sent to the second pulse signal and frequency signal of local side 20.
Preferably, as shown in Figure 1, the intermediate node device 10 includes:
Signal detection demodulation module 11 detects single-channel local side from the coupling of optical fiber single channel and is sent to remote ground terminal
Second pulse signal and frequency signal, and remote ground terminal are sent to the second pulse signal and frequency signal of local side, will believe from optical fiber list
Second pulse signal and frequency signal is demodulated in the carrier wave of road modulation to be exported respectively to pulse per second (PPS) receiving processing module and down coversion
Module；
Multiple down conversion modules 12, the frequency of the local side 20 that signal detection demodulation module 11 is demodulated to remote ground terminal 30
The crystal oscillator frequency signal that the frequency signal and crystal oscillator module of signal and remote ground terminal 30 to local side 20 export carries out down coversion, sends
To signal acquisition process control module 14；
Crystal oscillator module 13 generates crystal oscillator frequency signal, is sent to down conversion module 12；It will be controlled by signal acquisition process
The crystal oscillator frequency signal of the processing of module 14 as the standard-frequency signal exported and is sent to pulse per second (PPS) receiving processing module 15；
Signal acquisition process control module 14, A/D acquisition unit and D/A unit including multichannel, A/D acquisition unit
Local side 20 after down coversion is acquired to the frequency signal, crystal oscillator frequency signal and remote ground terminal 30 of remote ground terminal 30 to local side
20 frequency signal obtains the relative phase between above-mentioned each signal, is believed with the crystal oscillator frequency of D/A unit control crystal oscillator module output
Number, the phase of frequency signal for exporting crystal oscillator frequency signal phase with remote ground terminal 30 is consistent；
Pulse per second (PPS) receiving processing module 15 receives the identification signal local side 20 that demodulates of detection demodulation module 11 to remote
30 second pulse signal of ground terminal, remote ground terminal 30 to 20 second pulse signal of local side, measure between two second pulse signal rising edges
This time interval is deducted being delayed when sending and receiving divided by 2 of remote ground terminal, obtains optical fiber single channel intermediate node by time interval
The time delay value transmitted to the signal one way of remote ground terminal 30, the local side 20 received to remote 30 second pulse signal of ground terminal deducts intermediate
After the reception delay of node and remote ground terminal, in addition after the time delay value that intermediate node is transmitted to remote 30 signal one way of ground terminal, obtain
Crystal oscillator of the second pulse signal of intermediate node as reference signal, from crystal oscillator module through the control output of signal acquisition process control module
Multiple second pulse signals that frequency signal zero crossing is generated as rising edge are selected with the reference signal closest to (error is most
It is small) the second pulse signal that is exported as intermediate node of second pulse signal.
Above-mentioned intermediate node device can measure the time delay that signal at intermediate node returns again to intermediate node to remote ground terminal
Value to obtain, the one way time delay value of intermediate node signal to remote ground terminal, therefore receives signal and is delayed again an one way time delay
Amount, is exactly remote ground terminal signal location.
Further, it is preferable that further include:
Data receiver processing module 16, the local side 20 that reception signal detection demodulation module 11 demodulates to remote ground terminal 30
Data-signal receives remote ground terminal 30 to 20 data-signal of local side, the characteristic information of data-signal is extracted, for example, extracting source
The valuable informations such as head atomic clock feature, the amendment of route asymmetry time delay.
Preferably, the local side 20 and 30 frequency of use signal of remote ground terminal and second pulse signal carry out time-ofday signals table
Sign, the second pulse signal slightly mark use as the moment, and the frequency signal phase finely marks use as the moment, described
Frequency signal phase and second pulse signal are kept fixed alignment relation, and the moment slightly marks to be accurate to tens picoseconds
Time-ofday signals label, signal marks at the time of the moment finely marks to be accurate to subpicosecond.
Further, it is preferable that as shown in Fig. 2, the local side 20 includes:
First timesharing module 21, so that the timesharing in optical fiber single channel of local side 20 sends and receives second pulse signal and frequency
Rate signal；
First signal synthesis modulation module 22 sends period second pulse signal to be sent and frequency letter in local side 20
Number be modulated on single-channel carrier wave in different time to remote ground terminal 30 and send according to the instruction of the first timesharing module；
First signal detection demodulation module 23 receives the period in local side 20, demodulates from the carrier wave that single channel is modulated
Second pulse signal and frequency signal export send processing module and the first down conversion module to pulse per second (PPS) respectively；
Pulse per second (PPS) sends processing module 24, obtains the time delay lead of second pulse signal, wherein pass through the first signal synthesis
Modulation module sends initial second pulse signal to remote ground terminal 30, receives the first signal detection solution mode transfer of process that remote ground terminal 30 is sent back to
The second pulse signal that block 23 demodulates, measures the time interval between two second pulse signal rising edges, this time interval is deducted
Local side and remote ground terminal delay the time delay value for obtaining that signal one way is transmitted in single channel divided by 2 when sending and receiving, along with this
The reception delay of the transmission delay of ground terminal 20 and remote ground terminal 30 sends second pulse signal as next time delay lead；
First crystal oscillator module 25 generates crystal oscillator frequency signal, is sent to the first down conversion module；It will be adopted by the first signal
The crystal oscillator frequency signal for collecting processing and control module processing sends period frequency signal to be sent as local side 20, is sent to
First signal synthesis modulation module；
Multiple first down conversion modules 26 carry out down coversion to the standard-frequency signal of input, are sent to the first signal and adopt
Collect processing and control module；Down coversion is carried out to the crystal oscillator frequency signal that the first crystal oscillator module generates, and is sent to the first signal and adopts
Collect processing and control module；The frequency signal after the first signal detection demodulation module 23 that remote ground terminal 30 is returned carries out lower change
Frequently, it is sent to the first signal acquisition process control module；
First signal acquisition process control module 27, the first A/D acquisition unit and the first D/A unit including multichannel,
Crystal oscillator frequency signal and standard-frequency signal and reception remote ground terminal 30 of the first A/D acquisition unit acquisition after down coversion return
The frequency signal Jing Guo 23 demodulation the first down conversion module down coversion of the first signal detection demodulation module returned obtains above-mentioned each
Relative phase between signal controls the crystal oscillator frequency signal of the first crystal oscillator module output with D/A unit, passes through crystal oscillator frequency signal
Signal phase is consistent with the phase of standard-frequency signal after the transmission of single channel one way.
Preferably, the standard-frequency signal is sine wave signal, and the zero crossing of the sine wave signal and pulse per second (PPS) are believed
Number rising edge alignment, the frequency of the sine wave signal is integer.
Moreover it is preferred that as shown in figure 3, the remote ground terminal 30 includes:
Second timesharing module 31, so that the remote timesharing in optical fiber single channel of ground terminal 30 sends and receives second pulse signal and frequency
Rate signal；
Second signal detects demodulation module 32, holds 30 to receive the period in distant, demodulates from the carrier wave that single channel is modulated
Second pulse signal and frequency signal are exported respectively to the second pulse per second (PPS) receiving processing module and the second down conversion module；
Second crystal oscillator module 33 generates crystal oscillator frequency signal, is sent to the second down conversion module；It will be adopted by second signal
The frequency signal that the crystal oscillator frequency signal that collection processing and control module 37 is handled will be returned as the remote ground terminal 30 transmission period, sends
Give second signal comprehensive modulation module；Using the crystal oscillator frequency signal handled by second signal acquisition process control module 37 as
The standard-frequency signal output that moment finely marks, and it is sent to the second pulse per second (PPS) receiving processing module 36；
Multiple second down conversion modules 34, to the frequency signal and second demodulated by second signal detection demodulation module 32
The crystal oscillator frequency signal of crystal oscillator module output carries out down coversion, is sent to second signal acquisition process control module；
Second signal acquisition process control module 37, the 2nd A/D acquisition unit and the 2nd D/A unit including multichannel,
2nd A/D acquisition unit acquires the crystal oscillator frequency signal after down coversion and demodulates by second signal detection demodulation module 32
Frequency signal, obtain the relative phase between above-mentioned crystal oscillator frequency signal and frequency signal, it is brilliant with the control second of the 2nd D/A unit
The crystal oscillator frequency signal of module of shaking output detects the phase of the crystal oscillator frequency signal of output with the process second signal received
The frequency signal phase that 20 device of local side that demodulation module 32 demodulates is sent is consistent；
Second pulse per second (PPS) receiving processing module 36 receives local side 20 and sends through the second signal detection demodulation of demodulation module 32
Second pulse signal, using the second pulse signal as generate second pulse signal reference signal, from the second crystal oscillator module export
Rising edge of the frequency signal zero crossing as pulse per second (PPS), generates multiple second pulse signals, selects from multiple pulses and the ginseng
The second pulse signal that the immediate pulse per second (PPS) of signal is examined as remote ground terminal 30 exports；
Second signal integrates modulation module 35, holds 30 to send period second pulse signal to be sent in distant, data are compiled
Code pulse signal and frequency signal are modulated on single channel carrier wave in different time to local according to the instruction of the second timesharing module
End 20 is sent.
The frequency signal phase and local side reference standard frequency signal of above-mentioned remote ground terminal output (believe by most quasi- atomic clock
Number) phase is consistent, so as to also achieve local side reference standard frequency signal phase consistent for intermediate node.
Above-mentioned local side and remote ground terminal and apparatus of the present invention use thick label of the second pulse signal rising edge as the moment, just
Fine label of the string wave phase as the moment is measured processing to sine wave phase, is significantly subtracted using digital observation and control technology
The synchronous performance of Time Transmission is greatly improved in the small biggish analog device link of temperature coefficient.
In one particular embodiment of the present invention, in the local side of optical fiber single channel temporal frequency high-precision transmitting and far
On the intermediate node of ground terminal, the optical signal of the channel for temporal frequency transmitting is coupled out with fiber splitter and interleaver.In
Intermediate node device detects second pulse signal, data information and the frequency signal that local side is sent to remote ground terminal with photodetector
(phase) and remote ground terminal are sent to second pulse signal, data information and the frequency signal (phase) of local side.Intermediate node device
Interior intervalometer part measures the second pulse signal for receiving local side transmission and the second for receiving remote ground terminal passback
Pulse signal interval deducts the reception delay of the pulse per second (PPS) of remote ground terminal extended in intermediate node device when sending and receiving
Afterwards, the route time delay of intermediate node device to remote ground terminal can be calculated.Because the pulse per second (PPS) rising edge time of remote ground terminal has realized standard
Exactness is better than 1ns, and intermediate node can also handle to obtain the pulse per second (PPS) of the nearly 1ns of accuracy.Intermediate node device, which is measured, to be received
The phase of the frequency signal of crystal oscillator module output in the frequency signal (sine wave signal) and intermediate node device that local side is sent
Difference, and receive the phase difference of the frequency signal and crystal oscillator module output frequency signal in intermediate node device of remote ground terminal passback.
After the reception delay extended in intermediate node device when sending and receiving for deducting remote ground terminal frequency signal, middle node can be calculated
The line Phases of point device to remote ground terminal are delayed.Because of the frequency signal phase of remote ground terminal and the standard-frequency signal phase of local side
Stringent synchronization can control crystal oscillator module at intermediate node and realize accurate frequency signal phase output.Pulse per second (PPS) receiving area
It manages module 15 and the accurate frequency signal of phase (sine wave signal) zero crossing that crystal oscillator module exports is converted into the upper of pulse per second (PPS)
Edge is risen, the pulse per second (PPS) that the accuracy that reception is handled reaches nearly 1ns is switched as new accurate pulse per second (PPS) selection is generated,
A large amount of zero crossing is that the immediate pulse of pulse per second (PPS) of 1ns close with accuracy is selected in the pulse of rising edge as pulse per second (PPS),
Recover accurate second pulse signal.
Although content disclosed above shows exemplary embodiment of the present invention, it should be noted that without departing substantially from power
Under the premise of benefit requires the scope of the present invention limited, it may be many modifications and modify.In addition, although element of the invention
It can describe or require in the form of individual, it is also contemplated that it is multiple, it is unless explicitly limited odd number.
Claims (6)
1. a kind of optical fiber single channel temporal frequency high-precision transmitting intermediate node device, which is characterized in that setting in local side and
The single-channel intermediate node of optical fiber of remote ground terminal communication, the intermediate node device include:
Signal detection demodulation module detects the pulse per second (PPS) that single-channel local side is sent to remote ground terminal from the coupling of optical fiber single channel
Signal and frequency signal, and remote ground terminal are sent to the second pulse signal and frequency signal of local side, will modulate from optical fiber single channel
Carrier wave in demodulate second pulse signal and frequency signal and exported respectively to pulse per second (PPS) receiving processing module and down conversion module；
Multiple down conversion modules, frequency signal and remote ground terminal of the local side that signal detection demodulation module is demodulated to remote ground terminal
The crystal oscillator frequency signal exported to the frequency signal and crystal oscillator module of local side carries out down coversion, is sent to signal acquisition process control
Molding block；
Crystal oscillator module generates crystal oscillator frequency signal, is sent to down conversion module；It will be handled by signal acquisition process control module
Standard-frequency signal of the crystal oscillator frequency signal as output, and be sent to pulse per second (PPS) receiving processing module；
Signal acquisition process control module, A/D acquisition unit and D/A unit including multichannel, the acquisition of A/D acquisition unit are passed through
Local side after down coversion to remote ground terminal frequency signal, crystal oscillator frequency signal and remote ground terminal to the frequency signal of local side, obtain
Relative phase between above-mentioned each signal out believes crystal oscillator frequency with the crystal oscillator frequency signal of D/A unit control crystal oscillator module output
Number phase is consistent with the phase for the frequency signal that remote ground terminal exports；
Pulse per second (PPS) receiving processing module, the pulse per second (PPS) of the local side that reception identification signal detection demodulation module demodulates to remote ground terminal
The second pulse signal of signal, remote ground terminal to local side measures the time interval between two second pulse signal rising edges, will at this time
Between interval deduct remote ground terminal and delayed when sending and receiving divided by 2, obtain the signal of optical fiber single channel intermediate node to remote ground terminal
The time delay value of one way transmitting, the second pulse signal of the local side received to remote ground terminal deduct the reception of intermediate node and remote ground terminal
Shi Yanhou, in addition the second pulse signal for obtaining intermediate node is made after the time delay value that intermediate node is transmitted to remote ground end signal one way
For reference signal, the crystal oscillator frequency signal zero-crossing from crystal oscillator module through the control output of signal acquisition process control module is as upper
Rise the pulse per second (PPS) selected along the multiple second pulse signals generated with the immediate second pulse signal of the reference signal as output
Signal.
2. optical fiber single channel temporal frequency high-precision transmitting intermediate node device according to claim 1, which is characterized in that
Further include:
Data receiver processing module, the local side that reception signal detection demodulation module demodulates connect to the data-signal of remote ground terminal
Remote ground terminal is received to local side data-signal, extracts the characteristic information of data-signal.
3. optical fiber single channel temporal frequency high-precision transmitting intermediate node device according to claim 1, which is characterized in that
The local side and remote ground terminal frequency of use signal and second pulse signal carry out time-ofday signals characterization, the second pulse signal conduct
Moment slightly marks use, and the frequency signal phase finely marks use, the frequency signal phase and pulse per second (PPS) as the moment
Signal is kept fixed alignment relation, and signal marks at the time of the moment slightly marks to be accurate to tens picoseconds, when described
Fine label is carved to mark for signal at the time of being accurate to subpicosecond.
4. according to optical fiber single channel temporal frequency high-precision transmitting intermediate node device according to claim 3, feature
It is, the local side includes:
First timesharing module, so that local side timesharing in optical fiber single channel sends and receives second pulse signal and frequency signal；
First signal synthesis modulation module, local side send period second pulse signal to be sent and frequency signal carry out by
Instruction according to the first timesharing module is modulated on single-channel carrier wave in different time and sends to remote ground terminal；
First signal detection demodulation module receives the period in local side, and remote ground terminal hair is demodulated from the carrier wave that single channel is modulated
The second pulse signal and frequency signal sent export send processing module and the first down conversion module to pulse per second (PPS) respectively；
Pulse per second (PPS) sends processing module, obtains the time delay lead of second pulse signal, wherein modulates mould by the first signal synthesis
Block sends initial second pulse signal to remote ground terminal, receives the second for process the first signal detection demodulation module demodulation that remote ground terminal is sent back to
Pulse signal measures the time interval between two second pulse signal rising edges, by this time interval deduction local side and far
The time delay value for obtaining that signal one way is transmitted in single channel divided by 2 is delayed at end when sending and receiving, along with local side transmission when
Prolong with the reception delay of remote ground terminal as next time delay lead transmission second pulse signal；
First crystal oscillator module generates crystal oscillator frequency signal, is sent to the first down conversion module；The first signal acquisition process will be passed through
The crystal oscillator frequency signal of control module processing sends period frequency signal to be sent as local side, is sent to the first signal
Comprehensive modulation module；
Multiple first down conversion modules carry out down coversion to the standard-frequency signal of input, are sent to the first signal acquisition process
Control module；Down coversion is carried out to the crystal oscillator frequency signal that the first crystal oscillator module generates, and is sent to the first signal acquisition process
Control module；The frequency signal after the first signal detection demodulation module that remote ground terminal is returned carries out down coversion, is sent to
First signal acquisition process control module；
First signal acquisition process control module, the first A/D acquisition unit and the first D/A unit including multichannel, the first A/D
The process that crystal oscillator frequency signal and standard-frequency signal and reception remote ground terminal of the acquisition unit acquisition after down coversion return
The frequency signal of first signal detection demodulation module demodulation the first down conversion module down coversion, obtains the phase between above-mentioned each signal
To phase, the crystal oscillator frequency signal of the first crystal oscillator module output is controlled with D/A unit, makes crystal oscillator frequency signal through single channel one way
Signal phase is consistent with the phase of standard-frequency signal after transmission.
5. according to optical fiber single channel temporal frequency high-precision transmitting intermediate node device according to claim 3, feature
It is, the remote ground terminal includes:
Second timesharing module, so that remote ground terminal timesharing in optical fiber single channel sends and receives second pulse signal and frequency signal；
Second signal detects demodulation module, terminates time receiving section in distant, and pulse per second (PPS) letter is demodulated from the carrier wave that single channel is modulated
Number and frequency signal, exported respectively to the second pulse per second (PPS) receiving processing module and the second down conversion module；
Second crystal oscillator module generates crystal oscillator frequency signal, is sent to the second down conversion module；Second signal acquisition process will be passed through
The frequency signal that the crystal oscillator frequency signal of control module processing will be returned as the remote ground terminal transmission period, is sent to second signal
Comprehensive modulation module；It is finely marked by the crystal oscillator frequency signal of second signal acquisition process control module processing as the moment
Standard-frequency signal output, and be sent to the second pulse per second (PPS) receiving processing module；
Multiple second down conversion modules, to the frequency signal and the second crystal oscillator module by second signal detection demodulation module demodulation
The crystal oscillator frequency signal of output carries out down coversion, is sent to second signal acquisition process control module；
Second signal acquisition process control module, the 2nd A/D acquisition unit and the 2nd D/A unit including multichannel, the 2nd A/D
Crystal oscillator frequency signal of the acquisition unit acquisition after down coversion and the frequency letter by second signal detection demodulation module demodulation
Number, obtain the relative phase between above-mentioned crystal oscillator frequency signal and frequency signal, it is defeated to control the second crystal oscillator module with the 2nd D/A unit
Crystal oscillator frequency signal out makes the phase one of the phase of the crystal oscillator frequency signal of output and the standard-frequency signal of input local side
It causes；
Second pulse per second (PPS) receiving processing module receives local side and sends the pulse per second (PPS) letter through second signal detection demodulation module demodulation
Number, using the second pulse signal as the reference signal for generating second pulse signal, from the second crystal oscillator module output frequency signal mistake
Rising edge of the zero point as pulse per second (PPS), generates multiple second pulse signals, selects from multiple pulses and most connects with the reference signal
Second pulse signal of the close pulse per second (PPS) as remote ground terminal；
Second signal integrates modulation module, and end sends period second pulse signal to be sent, data encoding pulse letter in distant
Number and frequency signal be modulated on single channel carrier wave according to the instruction of the second timesharing module in different time and sent out to local side
It goes.
6. according to optical fiber single channel temporal frequency high-precision transmitting intermediate node device according to claim 4, feature
It is, the standard-frequency signal is sine wave signal, the zero crossing of the sine wave signal and the rising edge of second pulse signal
Alignment, the frequency of the sine wave signal are integer.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110989327A (en) * | 2019-12-26 | 2020-04-10 | 中国计量科学研究院 | Distributed high-precision time frequency real-time integrated system |
| CN112671464A (en) * | 2020-12-10 | 2021-04-16 | 中国计量科学研究院 | Double-channel time frequency high-precision transmission intermediate node device |
| CN112688753A (en) * | 2020-12-10 | 2021-04-20 | 中国计量科学研究院 | High-precision transmission device for looped network double-channel time frequency |
| CN112688734A (en) * | 2020-12-10 | 2021-04-20 | 中国计量科学研究院 | Looped network single-channel time frequency transmission device |
| CN112713981A (en) * | 2020-12-10 | 2021-04-27 | 中国计量科学研究院 | Double-channel time frequency high-precision transmission device and method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1357683A2 (en) * | 2002-04-25 | 2003-10-29 | Samsung Electronics Co., Ltd. | Hybrid fibre-radio system |
| WO2013148986A1 (en) * | 2012-03-30 | 2013-10-03 | Corning Cable Systems Llc | Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (mimo) configuration, and related components, systems, and methods |
| CN104506297A (en) * | 2014-12-16 | 2015-04-08 | 北京大学 | Frequency transmission system based on digital compensation systems, and transmission method of frequency transmission system |
| CN106603158A (en) * | 2016-11-11 | 2017-04-26 | 上海交通大学 | High-precision distributed optical fiber frequency transfer method |
| CN107911173A (en) * | 2017-08-03 | 2018-04-13 | 上海交通大学 | High-precision optical fiber microwave frequency transmission system |
| CN108011667A (en) * | 2017-11-28 | 2018-05-08 | 中国科学院国家授时中心 | Frequency conversion compensation microwave frequency transmission system and method |
| CN108988948A (en) * | 2018-08-20 | 2018-12-11 | 中国科学院上海光学精密机械研究所 | Coherent light, which is kept pouring in, passs relay system and trunking method |
| CN109257097A (en) * | 2018-07-13 | 2019-01-22 | 中国电子科技集团公司第四十四研究所 | High-precision distribution type fiber-optic wideband frequency transmission system and method |
| CN109547115A (en) * | 2018-09-21 | 2019-03-29 | 上海交通大学 | High efficiency far end radio frequency signal down conversion system and method based on sideband light locking phase |
-
2019
- 2019-04-19 CN CN201910318707.XA patent/CN110149562B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1357683A2 (en) * | 2002-04-25 | 2003-10-29 | Samsung Electronics Co., Ltd. | Hybrid fibre-radio system |
| WO2013148986A1 (en) * | 2012-03-30 | 2013-10-03 | Corning Cable Systems Llc | Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (mimo) configuration, and related components, systems, and methods |
| CN104506297A (en) * | 2014-12-16 | 2015-04-08 | 北京大学 | Frequency transmission system based on digital compensation systems, and transmission method of frequency transmission system |
| CN106603158A (en) * | 2016-11-11 | 2017-04-26 | 上海交通大学 | High-precision distributed optical fiber frequency transfer method |
| CN107911173A (en) * | 2017-08-03 | 2018-04-13 | 上海交通大学 | High-precision optical fiber microwave frequency transmission system |
| CN108011667A (en) * | 2017-11-28 | 2018-05-08 | 中国科学院国家授时中心 | Frequency conversion compensation microwave frequency transmission system and method |
| CN109257097A (en) * | 2018-07-13 | 2019-01-22 | 中国电子科技集团公司第四十四研究所 | High-precision distribution type fiber-optic wideband frequency transmission system and method |
| CN108988948A (en) * | 2018-08-20 | 2018-12-11 | 中国科学院上海光学精密机械研究所 | Coherent light, which is kept pouring in, passs relay system and trunking method |
| CN109547115A (en) * | 2018-09-21 | 2019-03-29 | 上海交通大学 | High efficiency far end radio frequency signal down conversion system and method based on sideband light locking phase |
Non-Patent Citations (4)
| Title |
|---|
| HAOYUAN LU: "《Two-Way Optical Time and Frequency Transfer Over a 20-km Fiber Link Based on Optical Frequency Combs》", 《IEEE PHOTONICS JOURNAL》 * |
| JIE ZHANG: "《High Precision Time Transfer Using Low Cost Optical Transceiver Module》", 《2018 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM (IFCS)》 * |
| 曹群: "《基于本地测量的双向光学相位比对方法》", 《中国激光》 * |
| 白龙: "《基于光纤的标准频率信号传输技术研究》", 《第七届中国卫星导航学术年会论文集——S06 原子钟与时频技术中国卫星导航学术年会组委会会议论文集》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110989327A (en) * | 2019-12-26 | 2020-04-10 | 中国计量科学研究院 | Distributed high-precision time frequency real-time integrated system |
| CN110989327B (en) * | 2019-12-26 | 2021-03-30 | 中国计量科学研究院 | Distributed high-precision time frequency real-time integrated system |
| CN112671464A (en) * | 2020-12-10 | 2021-04-16 | 中国计量科学研究院 | Double-channel time frequency high-precision transmission intermediate node device |
| CN112688753A (en) * | 2020-12-10 | 2021-04-20 | 中国计量科学研究院 | High-precision transmission device for looped network double-channel time frequency |
| CN112688734A (en) * | 2020-12-10 | 2021-04-20 | 中国计量科学研究院 | Looped network single-channel time frequency transmission device |
| CN112713981A (en) * | 2020-12-10 | 2021-04-27 | 中国计量科学研究院 | Double-channel time frequency high-precision transmission device and method |
| CN112688734B (en) * | 2020-12-10 | 2022-03-15 | 中国计量科学研究院 | Looped network single-channel time frequency transmission device |
| CN112688753B (en) * | 2020-12-10 | 2023-02-24 | 中国计量科学研究院 | High-precision transmission device for looped network double-channel time frequency |
| CN112713981B (en) * | 2020-12-10 | 2023-03-14 | 中国计量科学研究院 | Double-channel time frequency high-precision transmission device and method |
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