CN109039496A - A kind of two-way pumping station modem Delay Variation aided measurement device and method - Google Patents
A kind of two-way pumping station modem Delay Variation aided measurement device and method Download PDFInfo
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- CN109039496A CN109039496A CN201810964771.0A CN201810964771A CN109039496A CN 109039496 A CN109039496 A CN 109039496A CN 201810964771 A CN201810964771 A CN 201810964771A CN 109039496 A CN109039496 A CN 109039496A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/364—Delay profiles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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Abstract
This application discloses a kind of two-way pumping station modem Delay Variation aided measurement device and methods.Described device, comprising: emission switch, receives switch, main control unit: the emission switch at power control unit, for the signal of receiving modem output, switches to satellite two-way pumping station system or power control unit；The power control unit, the power for the output signal to the emission switch are adjusted by first threshold, export calibration signal；The reception switch generates modem and inputs intermediate-freuqncy signal for selecting the output signal and the calibration signal of satellite two-way pumping station system frequency conversion equipment；The main control unit, for controlling emission switch and receiving the Path selection of switch, setting first threshold.Present invention also provides a measurement methods using apparatus above.Compared with existing modem Delay Variation measuring device and method, the application has the advantages that be suitable for satellite two-way pumping station system, simple in structure, flexible in application removable.
Description
Technical field
The present invention relates to satellite time synchronization two-way pumping station field more particularly to a kind of satellite two-way pumping station modems
Delay Variation aided measurement device and method.
Background technique
Two Way Satellite Time Transfer is a kind of high-precision Time Transmission technology to method, it utilizes Syncom satellite
Forwarding time transmits the timing modulation information between earth station, realizes that each station temporal information is interactive and high precision time difference measures.
In practical applications, the variation of earth station's channel time delay is to influence Two Way Satellite Time Transfer to the main error of precision
Source, in general, can by Two Way Satellite Time Transfer to calibration system (mobile reference station) to entire satellite two-way pumping station system
System carries out whole evaluation of alignment, can also be realized by satellite simulator method from antenna end to the earth station of modem front end
Channel time delay calibration, but it is more difficult for the measurement in modem path delay of time itself, and the prior art can be by building
Peculiar system realizes the measurement in the modem path delay of time itself, but test method is complicated, is not suitable for satellite two-way pumping station
System.
Summary of the invention
Present applicant proposes a kind of two-way pumping station modem Delay Variation aided measurement device and methods, solve tradition
Measuring device and method are complicated, are not suitable for the problem of satellite two-way pumping station system.
The embodiment of the present application adopts the following technical solutions:
The embodiment of the present application provides a kind of two-way pumping station modem Delay Variation aided measurement device, comprising: transmitting
Switch, receives switch, main control unit: the emission switch at power control unit, the letter for receiving modem output
Number, switch to satellite two-way pumping station system or power control unit；The power control unit, for the emission switch
The power of output signal is adjusted by first threshold, exports calibration signal；The reception switch, for selecting the two-way ratio of satellite
Output signal and the calibration signal to system frequency conversion equipment generate modem and input intermediate-freuqncy signal；The master control list
Member, for controlling emission switch and receiving the Path selection of switch, setting first threshold, main control unit and emission switch, power
Control unit receives switch by control bus connection, and main control unit is connect by remote control interface with external equipment.
Preferably, further include temperature control unit, be used for control device internal temperature, temperature control unit is total by control
Line is connect with the main control unit, and the main control unit is for controlling temperature adjustment threshold value.
Most preferably, the emission switch, reception switch are the switches of high-isolation.
The embodiment of the present application also provides a kind of two-way pumping station modem Delay Variation auxiliary measuring method, more than use
Device, comprising the following steps: by the signal input end of intermediate frequency of modem and output end from satellite two-way pumping station system break
It opens；The power of modem output signal is adjusted by first threshold, exports calibration signal；The calibration signal is defeated
Enter the signal input end of intermediate frequency of modem；The self time-delay of different bit rate downward modulation modems is measured, is obtained
Delay measurements under different bit rates；Average value is calculated to the delay measurements under the different bit rates, obtains different codes
Time-delay calibration value under rate；The signal input end of intermediate frequency of modem and output end are accessed into satellite two-way pumping station system.
Preferably, the delay measurements under different bit rates calculate average value, obtain under different bit rates when
The step of prolonging calibration value further includes: retaining intermediate value to the delay measurements under the different bit rates and rejects two number of edges
Value, obtains the delay measurements optimized under different bit rates.
Preferably, first threshold is the normal IF input signals performance number for comparing mode downward modulation modem.
Preferably, the time of measuring that the self time-delay to different bit rate downward modulation modems measures is 3 points
Clock.
Preferably, the number for retaining intermediate value is 120.
At least one above-mentioned technical solution that the embodiment of the present application uses can reach following the utility model has the advantages that with existing modulation
Demodulator Delay Variation measuring device and method compare, the application be suitable for satellite two-way pumping station system, structure it is simple, using spirit
Work is removable.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of two-way pumping station modem Delay Variation aided measurement device embodiment；
Fig. 2 is the structural schematic diagram of another embodiment of two-way pumping station modem Delay Variation aided measurement device；
Fig. 3 is the flow chart of two-way pumping station modem Delay Variation auxiliary measuring method embodiment；
Fig. 4 is the flow chart of another embodiment of two-way pumping station modem Delay Variation auxiliary measuring method.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
Two Way Satellite Time Transfer is a kind of high-precision Time Transmission technology to method, it utilizes Syncom satellite
Forwarding time transmits the timing modulation information between earth station, realizes that each station temporal information is interactive and high precision time difference measures, in recent years
Carry out the progress with satellite communication and Pseudo Code Spread Spectrum technology, so that the precision of satellite two-way time transfer system is further promoted,
Satellite two-way time transfer has become the main means that International Atomic Time (TAI) is calculated, the standard time traces to the source at present, and in height
The fields such as synchronization, radionavigation are widely applied between precision station.
Two Way Satellite Time Transfer generally cooperates to system by two or more stations, and each station owner will include Time Transmission
Modem defends logical transceiver and defends the equipment such as exceedingly high line, using the symmetry of bi-directional link come when eliminating path
Prolong, the time difference measurement of nanosecond order is realized with this.But in practical application, the variation of earth station's channel time delay is that influence satellite is two-way
The main source of error of precision of time comparison in general can be (mobile to refer to calibration system by Two Way Satellite Time Transfer
Stand) whole evaluation of alignment is carried out to entire satellite two-way pumping station system, it can also be realized by satellite simulator method from antenna end
Earth station's channel time delay to modem front end is calibrated, but the absolute calibration for modem path delay of time itself,
Calibration especially for transmission channel and the absolute time delay of receiving channel seems extremely difficult, although can be by building peculiar system
System is realized, but test method is complicated, is not suitable for satellite two-way pumping station system.
Below in conjunction with attached drawing, the technical scheme provided by various embodiments of the present application will be described in detail.
Fig. 1 is the structural schematic diagram of two-way pumping station modem Delay Variation aided measurement device embodiment.The application
A kind of two-way pumping station modem Delay Variation aided measurement device that embodiment provides, comprising: emission switch 11, power control
Unit 12 processed receives switch 13, main control unit 14: the emission switch 11, for the signal that receiving modem exports, cuts
Shift to satellite two-way pumping station system or power control unit 12；The power control unit 12, for the emission switch
The power of output signal is adjusted by first threshold, exports calibration signal；The reception switch 13, for selecting satellite two-way
The output signal of Compare System frequency conversion equipment and the calibration signal generate modem and input intermediate-freuqncy signal；The master control
Unit 14, for controlling emission switch 11 and receiving the Path selection of switch 13, setting first threshold, main control unit 14 and transmitting
Switch 11, power control unit 12, receive switch 13 by control bus connect, main control unit 14 pass through remote control interface and
External equipment connection.
When modem needs to calibrate, emission switch 11 switches to 12 one end of power control unit, and modem is defeated
For signal out by 11 ingoing power control unit 12 of emission switch, power control unit 12 is usually attenuator or amplifier
Part is adjusted the power of the output signal of emission switch 11 by first threshold, and first threshold is by those skilled in the art's root
Allow input power and measurement convenient degree to determine according to modem signal input end of intermediate frequency, is e.g. equal to normal compare
The IF input signals power of mode downward modulation modem, is not specifically limited here.The output calibration letter of power control unit 12
Number, it receives switch 13 and switches to calibration signal one end, by the signal input end of intermediate frequency of the calibration signal incoming modem；
The measurement of modem completion time delay；After being measured, emission switch 11 and reception switch 13 switch to satellite two-way pumping station
System restores normal and compares mode.Main control unit 14 and emission switch 11, power control unit 12, reception switch 13 pass through control
Bus processed connection, and being connect by remote control interface with external equipment, for controlling normal comparison mode and calibration mode
Switching, the Path selection of emission switch 11 and reception switch 13, setting first threshold.The time delay of modem measurement contains
The time delay of modem itself and the time delay of route, other than power control unit 12, modem and sliver
Two-way pumping station system is all accessed under normal comparison mode in road, and the time delay of power control unit 12 can to the measurement of whole time delay
To ignore.The two-way pumping station modem Delay Variation aided measurement device accesses satellite under normal comparison mode
Two-way pumping station system, when modem needs to calibrate, latency measurement can be carried out by carrying out pattern switching by main control unit,
Normal comparison mode is switched back by main control unit after measurement, can restore to work normally.
Preferred embodiment: the emission switch 11, reception switch 13 are the switches of high-isolation as described above.
Fig. 2 is the structural schematic diagram of another embodiment of two-way pumping station modem Delay Variation aided measurement device.This
Apply for a kind of two-way pumping station modem Delay Variation aided measurement device that embodiment provides, comprising: emission switch 11, function
Rate control unit 12 receives switch 13, main control unit 14；Further include temperature control unit 25: the temperature control unit 25 is used
In control device internal temperature, temperature control unit 25 is connect by control bus with the main control unit 14, the master control list
Member 14 is for controlling temperature adjustment threshold value.
The temperature control unit 25 is connect by control bus with the main control unit 14, for temperature inside control device
Degree, to guarantee to measure calibrating installation self time-delay stability.Temperature control unit 25 adjusts adjusting thresholds system according to temperature
Internal temperature, described temperature adjustment threshold value those skilled in the art determine according to device performance and application environment, do not do herein
It is specific to limit.Temperature adjustment threshold value is arranged and is adjusted by main control unit 14.
Preferred embodiment: the emission switch 11, reception switch 13 are the switches of high-isolation as described above.
Fig. 3 is the flow chart of two-way pumping station modem Delay Variation auxiliary measuring method embodiment.The application is implemented
A kind of two-way pumping station modem Delay Variation auxiliary measuring method that example provides, comprising the following steps:
Step 101: the signal input end of intermediate frequency of modem and output end are opened from satellite two-way pumping station system break.
This step is to do the preparation of modem latency measurement, under normal comparison mode, the intermediate frequency of modem
Signal input part and output end are respectively connected to satellite two-way pumping station system, this step is to input the intermediate-freuqncy signal of modem
End and output end are opened from satellite two-way pumping station system break.
Step 102: the power of modem output signal being adjusted by first threshold, exports calibration signal.
This step is since the power of modem output signal may not be in modem signal input end of intermediate frequency
In the range of permission input power or it is unfavorable for measuring, it is therefore desirable to the power of modem output signal is adjusted,
Adjustment is carried out according to first threshold, and first threshold is allowed by those skilled in the art according to modem signal input end of intermediate frequency
Input power and the IF input signals for measuring convenient degree to determine, e.g. equal to normal comparison mode downward modulation modem
Power is not specifically limited here.Output signal adjusted is calibration signal.
Such as modem signal input end of intermediate frequency allows the range of input power to be -40dBm~0dBm, modulation /demodulation
The power of device output signal is -10dBm, and first threshold is set as -30dBm, then carries out modem output signal power
Decaying, the calibration signal performance number of output is -30dBm.
In step 102 as described above, first threshold is the normal IF input signals function for comparing mode downward modulation modem
Rate value.
First threshold is not specifically limited in step 102, it is preferred that be set as normally comparing by first threshold
The time-delay calibration value that the IF input signals performance number of mode downward modulation modem is obtained in the case and practical time delay value
It is more close.It should be noted that first threshold is also possible to other numerical value, it is not specially limited here.
Such as the normal IF input signals performance number for comparing mode downward modulation modem is -30dBm, then by first threshold
It is set as -30dBm.
Step 103: by the signal input end of intermediate frequency of the calibration signal incoming modem.
This step is by forming the signal input end of intermediate frequency of calibration signal incoming modem closed circuit, being
Measurement is prepared.
Step 104: the self time-delay of different bit rate downward modulation modems being measured, is obtained under different bit rates
Delay measurements.
This step is since the delay measurements of different bit rate downward modulation modems have difference, it is therefore desirable in advance about
It is fixed that the self time-delay of modem under different bit rates is measured.Measurement is completed and is stored by modem.
It should be noted that all needing when system is restarted or powered on every time to different bit rate downward modulation modems
Time delay is re-measured.
In step 104 as described above, it is preferable that the self time-delay to different bit rate downward modulation modems is surveyed
The time of measuring of amount is 3 minutes.
It should be noted that time of measuring is also possible to other numerical value, it is not specially limited here.
Step 105: average value is calculated to the delay measurements under the different bit rates, obtain under different bit rates when
Prolong calibration value.
This step is to be averaged the multiple measured value under different bit rates respectively, is respectively obtained under different bit rates
Time-delay calibration value, it is therefore an objective to improve precision.
Such as do 120 measurements respectively under different bit rates, the measured value under different bit rates is averaged respectively,
Respectively obtain the time-delay calibration value under different bit rates.
Step 106: the signal input end of intermediate frequency of modem and output end are accessed into satellite two-way pumping station system.
This step is to be measured, and the signal input end of intermediate frequency of modem and output end are taken back the two-way ratio of satellite
To system, restores normal and compare mode.
Fig. 4 is the flow chart of another embodiment of two-way pumping station modem Delay Variation auxiliary measuring method.The application
A kind of two-way pumping station modem Delay Variation auxiliary measuring method that another embodiment provides, comprising the following steps:
Step 201: the signal input end of intermediate frequency of modem and output end are opened from satellite two-way pumping station system break.
(with step 101)
Step 202: the power of modem output signal being adjusted by first threshold, exports calibration signal.It is (same
Step 102)
Step 203: by the signal input end of intermediate frequency of the calibration signal incoming modem.(with step 103)
Step 204: the self time-delay of different bit rate downward modulation modems being measured, is obtained under different bit rates
Delay measurements.(with step 104)
Step 205: intermediate value being retained to the delay measurements under the different bit rates and rejects both sides numerical value, is obtained not
With the delay measurements optimized under bit rate.
This step is that sequence arranges by size respectively by the delay measurements under different bit rates, both sides is deviateed biggish
Numerical value is rejected, and retains intermediate rest numerical value, then calculate average value, to improve the accuracy of time-delay calibration value.The number of measured value
With reject the number of numerical value by those skilled in the art rule of thumb and measurement convenient degree determines, do not do specific limit herein
It is fixed.
Such as 124 delay measurements have been obtained under some bit rate, by size sequentially by this 122 delay measurements
Arrangement weeds out both sides and deviates biggish 4 numerical value, retains remaining 120 delay measurements.
In step 205, it is preferable that the number for retaining intermediate value is 120.
It should be noted that the number for retaining intermediate value is also possible to other numerical value, it is not specially limited here.
Step 206: average value is calculated to the delay measurements under the different bit rates, obtain under different bit rates when
Prolong calibration value.(with step 105)
Step 207: the signal input end of intermediate frequency of modem and output end are accessed into satellite two-way pumping station system.It is (same
Step 106)
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described want
There is also other identical elements in the process, method of element, commodity or equipment.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (8)
1. a kind of two-way pumping station modem Delay Variation aided measurement device characterized by comprising emission switch, function
Rate control unit receives switch, main control unit:
The emission switch switches to satellite two-way pumping station system or power control for the signal of receiving modem output
Unit processed；
The power control unit, the power for the output signal to the emission switch is adjusted by first threshold, defeated
Calibration signal out；
The reception switch is produced for selecting the output signal and the calibration signal of satellite two-way pumping station system frequency conversion equipment
Raw modem inputs intermediate-freuqncy signal；
The main control unit, for control emission switch and receive switch Path selection, setting first threshold, main control unit with
Emission switch, power control unit, reception switch are connected by control bus, and main control unit passes through remote control interface and outside
Equipment connection.
2. two-way pumping station modem Delay Variation aided measurement device as described in claim 1, which is characterized in that also wrap
Temperature control unit is included, control device internal temperature is used for, temperature control unit is connected by control bus and the main control unit
It connects, the main control unit is for controlling temperature adjustment threshold value.
3. such as the described in any item two-way pumping station modem Delay Variation aided measurement devices of claim 1~2, feature
It is, the emission switch receives the switch that switch is high-isolation.
4. a kind of two-way pumping station modem Delay Variation auxiliary measuring method, described in any item using claims 1 to 33
Device, which comprises the following steps:
The signal input end of intermediate frequency of modem and output end are opened from satellite two-way pumping station system break；
The power of modem output signal is adjusted by first threshold, exports calibration signal；
By the signal input end of intermediate frequency of the calibration signal incoming modem；
The self time-delay of different bit rate downward modulation modems is measured, the delay measurements under different bit rates are obtained；
Average value is calculated to the delay measurements under the different bit rates, obtains the time-delay calibration value under different bit rates；
The signal input end of intermediate frequency of modem and output end are accessed into satellite two-way pumping station system.
5. method as claimed in claim 4, which is characterized in that the delay measurements under different bit rates calculate average
The step of being worth, obtaining the time-delay calibration value under different bit rates further includes:
Intermediate value is retained to the delay measurements under the different bit rates and rejects both sides numerical value, is obtained excellent under different bit rates
The delay measurements of change.
6. such as the described in any item two-way pumping station modem Delay Variation auxiliary measuring methods of claim 4~5, feature
It is, first threshold is the normal IF input signals performance number for comparing mode downward modulation modem.
7. such as the described in any item two-way pumping station modem Delay Variation auxiliary measuring methods of claim 4~5, feature
It is, the time of measuring that the self time-delay to different bit rate downward modulation modems measures is 3 minutes.
8. two-way pumping station modem Delay Variation auxiliary measuring method as claimed in claim 5, which is characterized in that described
The number for retaining intermediate value is 120.
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| CN201810964771.0A CN109039496B (en) | 2018-08-23 | 2018-08-23 | Auxiliary measurement device and method for time delay change of bidirectional comparison modem |
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Cited By (1)
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| CN111835440A (en) * | 2020-09-10 | 2020-10-27 | 翱捷科技(深圳)有限公司 | Automatic calibration method and system for chip radio frequency signal delay measurement parameters |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111835440A (en) * | 2020-09-10 | 2020-10-27 | 翱捷科技(深圳)有限公司 | Automatic calibration method and system for chip radio frequency signal delay measurement parameters |
| WO2022052428A1 (en) * | 2020-09-10 | 2022-03-17 | 翱捷科技(深圳)有限公司 | Automatic calibration method and system for chip radio frequency signal delay measurement parameters |
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