CN106533529A - Modulation and demodulation system and method for two-way time comparison of satellite - Google Patents
Modulation and demodulation system and method for two-way time comparison of satellite Download PDFInfo
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- CN106533529A CN106533529A CN201610856703.3A CN201610856703A CN106533529A CN 106533529 A CN106533529 A CN 106533529A CN 201610856703 A CN201610856703 A CN 201610856703A CN 106533529 A CN106533529 A CN 106533529A
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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
- H04B7/18513—Transmission in a satellite or space-based system
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
Abstract
The invention discloses a modulation and demodulation system for the two-way time comparison of a satellite. The system comprises a frequency reference module used for converting a received external frequency reference signal into a local oscillator frequency signal and a clock signal; a signal receiving module used for receiving a reception signal transferred from a comparison station, and processing the signal to obtain a low-medium-frequency signal; a signal processing module used for receiving a second pulse signal and the low-medium-frequency signal to obtain a synthesized low-medium-frequency signal; a signal transmitting module used for processing the synthesized low-medium-frequency signal to obtain a transmission signal, and sending the transmission signal to the comparison station; a master control module used for controlling the signal processing module to track the reception signal and the transmission signal so as to obtain the pseudorange measurement information. In this way, the two-place clock correction is obtained. The invention also discloses a modulation and demodulation method for the satellite two-way time comparison of the system. According to the technical scheme of the invention, on the premise that the high measurement accuracy is ensured, the miniaturization and the portability of the system are realized.
Description
Technical field
The present invention relates to Two Way Satellite Time Transfer is to field.More particularly, to a kind of tune of Two Way Satellite Time Transfer pair
Demodulating system processed and method.
Background technology
Two Way Satellite Time Transfer is a kind of high-precision Time Transmission technology to method, and it utilizes Syncom satellite
Timing modulation information between forwarding time transmission earth station, realizes the interaction of each station temporal information and high precision time difference measurement, in recent years
Carry out the progress with Pseudo Code Spread Spectrum technology with satellite communication so that the precision of satellite two-way time transfer system is further lifted,
Satellite two-way time transfer has become the Main Means that International Atomic Time is calculated, the standard time traces to the source at present, and in high accuracy
Between standing, the field such as synchronization, radionavigation is extensively applied.
To system typically by two or more station collaborative works, each station owner will include Time Transmission to Two Way Satellite Time Transfer
Modem, defend logical transceiver and defend the equipment such as exceedingly high line, which is eliminated during path using the symmetry of bi-directional link
Prolong, the time difference measurement of nanosecond order is realized with this.Traditional Two Way Satellite Time Transfer is atom to modem operation principle
The 10MHz frequency standard signals and pps pulse per second signal of clock, is input into satellite communication ground by modem modulation to after 70MHz intermediate frequencies
Face station, while modem receives the 70MHz intermediate-freuqncy signals of the output of satellite communication earth station, therefrom demodulates data message
With pps pulse per second signal, the measurement of two places clock correction is finally realized.But as the signal input of traditional two-way Time transfer receiver device is exported
All it is 70MHz, therefore, heaviness big using volume and can only be on the verge of superseded when two-way Time transfer receiver system is set up
Transceiver is used as frequency conversion equipment, and the up-conversion power amplifier that directly small volume and performance can not be used more excellent
Equipment, or one-level frequency conversion equipment can only be further added by.Two Way Satellite Time Transfer be this strongly limits to system to miniaturization, portable
Change the development in direction, the application to two-way Time transfer receiver technology generates adverse effect.
The content of the invention
In order to solve at least one problem above, the invention provides a kind of modulation /demodulation system of Two Way Satellite Time Transfer pair
System and method, can make system compact, portability while high measurement precision is ensured.
For reaching above-mentioned purpose, the present invention adopts following technical proposals：
One aspect of the present invention discloses a kind of modulation demodulation system of Two Way Satellite Time Transfer pair, it is characterised in that described
System includes：
Frequency reference module, for being converted to local oscillation frequency signal and clock letter by the foreign frequency reference signal of reception
Number；
Signal receiving module, for as reference, receiving the reception signal for comparing station transmission, place with the local oscillation frequency signal
Reason obtains low intermediate frequency signal；
Signal processing module, for receiving pps pulse per second signal and the low intermediate frequency signal, with the clock signal as reference,
Obtain the low intermediate frequency signal for synthesizing；
Signal transmitting module, as reference the low intermediate frequency signal of the synthesis is processed for the local oscillation frequency signal
Sending signal is obtained, and is sent to the comparison station；
Main control module, for controlling the signal processing module tracking reception signal and the sending signal, obtains
Pseudo range measurement information, so that obtain two places clock correction.
Preferably, the frequency reference module includes multichannel frequency synthesizer, and the multichannel frequency synthesizer is used for
Foreign frequency reference signal is received, the reference frequency signal is converted to into local oscillation frequency signal and clock signal.
Preferably, the signal receiving module includes low-converter and automatic gain controller, and the low-converter is used for
The reception signal for comparing that station sends is received, the reception signal is down-converted to into low intermediate frequency signal, the automatic gain controller
For receiving the low intermediate frequency signal, export to the signal processing module after entering line level adjustment to the low intermediate frequency signal.
Preferably, the signal processing module includes modulation /demodulation combination function unit and time service unit, the modulatedemodulate
Adjust combination function unit to be used for receiving the low intermediate frequency signal and outside pps pulse per second signal, obtain the low intermediate frequency signal for synthesizing, institute
Time service unit is stated for standard time stamp information being provided for the modulation /demodulation combination function unit.
Preferably, the signal transmitting module includes frequency mixer, and the frequency mixer is used for receiving the signal processing module
The low intermediate frequency signal of the synthesis of transmission, and the low intermediate frequency signal up-conversion of the synthesis is obtained into sending signal, and by institute
State sending signal to send to comparison station.
Preferably, the main control module includes main control computer and display, and the main control computer is used for tracking the reception signal
With the sending signal, pseudo range measurement information is obtained, so as to obtain two places clock correction, the display is used for showing the main control computer
Running status.
Preferably, the frequency reference module is for the foreign frequency reference signal of reception is converted to by integer, decimal
The clock signal of the group of frequencies of clock signal composition and local oscillation frequency signal.
Preferably, the signal receiving module and signal transmitting module are used for receiving and sending the reception letter of L-band
Number and the sending signal.
Preferably, the frequency reference module and the signal processing module are used for receiving the frequency base of homologous coherent
Calibration signal and the pps pulse per second signal.
Another aspect of the present invention also discloses a kind of modulation-demo-demodulation method of Two Way Satellite Time Transfer pair, and its feature exists
In the method comprising the steps of：
S1：The reference frequency signal of reception is converted to into local oscillation frequency signal and clock signal；
S2：With the local oscillation frequency signal as reference, the reception signal for comparing station transmission is received, process obtains Low Medium Frequency letter
Number；
S3：Receive pps pulse per second signal and the low intermediate frequency signal, with the clock signal as reference, obtain synthesizing it is low in
Frequency signal；
S4：With the local oscillation frequency signal as reference, the low intermediate frequency signal of the synthesis is processed and obtains sending signal, and
Send to described and compare station；
S5：The tracking reception signal and the sending signal, obtain pseudo range measurement information, so as to obtain two places clock correction.
Beneficial effects of the present invention are as follows：
A kind of two-way Time transfer receiver modulation demodulation system disclosed by the invention and method, can overcome using conventional modulated solution
The satellite two-way pumping station systems bulky of device, heavy problem is adjusted, while high measurement accuracy is ensured, two-way time ratio is made
To modulation demodulation system miniaturization, portability.
Description of the drawings
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in further detail.
Fig. 1 illustrates a kind of structural representation of the modulation demodulation system of Two Way Satellite Time Transfer pair disclosed by the invention.
Fig. 2 illustrates a kind of structure of the modulation demodulation system preferred embodiment of Two Way Satellite Time Transfer pair disclosed by the invention
Schematic diagram.
Specific embodiment
In order to be illustrated more clearly that the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.In accompanying drawing, similar part is indicated with identical reference.It will be appreciated by those skilled in the art that institute is concrete below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
As shown in figure 1, one aspect of the present invention discloses a kind of modulation demodulation system of Two Way Satellite Time Transfer pair, the system
System includes：Frequency reference module, signal receiving module, signal processing module, signal transmitting module and main control module.
The frequency reference module is for being converted to local oscillation frequency signal and clock by the foreign frequency reference signal of reception
Signal.The reference frequency signal is preferably 10MHz, and the clock signal may include integer clock signal and decimal clock letter
Number；The preferred multichannel frequency synthesizer of the frequency reference module 1.
The signal receiving module is believed for as reference, receiving the reception for comparing station transmission with the local oscillation frequency signal
Number, process obtains low intermediate frequency signal, and the low intermediate frequency signal is sent to the signal processing module, and the reception signal can
For L-band signal, the signal receiving module may include low-converter 3 and automatic gain controller 4；
The signal processing module is used for receiving pps pulse per second signal and the low intermediate frequency signal, with the clock signal as ginseng
Examine, obtain the low intermediate frequency signal for synthesizing, wherein described pps pulse per second signal and the reference frequency signal are homologous coherent, the letter
Number processing module may include modulation /demodulation combination function unit 5 and NTP/GNSS time service units 8；
The signal transmitting module for the local oscillation frequency signal as reference, at the low intermediate frequency signal of the synthesis
Reason obtains sending signal, and sends to the comparison station, and the signal transmitting module may include frequency mixer 2, the sending signal
It can be L-band signal；
The main control module is used for controlling the signal processing module tracking reception signal and the sending signal mistake
Journey simultaneously obtains pseudo range measurement information, and so as to obtain two places clock correction, the main control module may include main control computer 6 and display 7.
As shown in Fig. 2 in a preferred embodiment of the present invention, the system includes：It is multichannel frequency synthesizer 1, mixed
Frequency device 2, low-converter 3, automatic gain controller 4, modulation /demodulation combination function unit 5, main control computer 6, display 7 and NTP/
GNSS time service units 8.The annexation of wherein each part can be：1 local frequency outfan of multichannel frequency synthesizer and mixing
The reference frequency input radio-frequency cable connection of device 2, low-converter 3；1 clock signal of multichannel frequency synthesizer and modulation /demodulation
The reference frequency input radio-frequency cable connection of combination function unit 5；The signal output part and automatic growth control of low-converter 3
The signal input part radio-frequency cable connection of device 4；The signal output part of automatic gain controller 4 and modulation /demodulation combination function unit
5 low intermediate frequency signal input radio-frequency cable connection；The low intermediate frequency signal outfan of the synthesis of modulation /demodulation combination function unit 5
It is connected with the signal input part radio-frequency cable of frequency mixer 2；The data output end of modulation /demodulation combination function unit 5 and main control computer 6
Connected by data/address bus；The control end of modulation /demodulation combination function unit 5 is connected by controlling bus with main control computer 6；Master control
Machine 6 is connected by holding wire with display 7；8 timestamp information outfan of NTP/GNSS time service units combines work(with modulation /demodulation
The data output end of energy unit 5 is connected by data/address bus.
Operationally, external time frequency reference is that multichannel frequency synthesizer 1 provides 10MHz frequencies to the preferred embodiment
Rate reference signal, multichannel frequency synthesizer 1 carry out local frequency after frequency synthesis in output system needed for each module, integer
Clock signal and decimal clock signal, the integer clock signal and decimal clock signal are used as modulation /demodulation combination function unit
The phase noise performance of 5 Time and frequency standard, the integer clock signal and decimal clock signal requires higher, the local oscillator
Frequency is L-band frequency, is that frequency mixer 2 and low-converter 3 are used；The system needs to receive the up-conversion power amplification for comparing station
The L-band satellite two-way pumping station signal of device output, while the L-band signal two-way pumping station sending signal for itself producing is sent to
Up-conversion power amplifier, after system is initial, passes through NTP/GNSS time service lists using ntp server or GNSS
First 8 pairs of systems carry out time service, provide the timestamp information of standard for system, make our station and to compare realize that level time second is same between station
Step, modulation /demodulation combination function unit 5 receive pps pulse per second signal and synthesize low intermediate frequency signal, by the low intermediate frequency signal transmission of synthesis
To frequency mixer 2, the low intermediate frequency signal of the synthesis is upconverted to local L-band signal by frequency mixer 2, used as sending signal transmission
To the up-conversion power amplifier for comparing station；Meanwhile, low-converter 3 receives the L of the up-conversion power amplifier output for comparing station
Band signal is simultaneously down-converted to low intermediate frequency signal, then its output level is adjusted by automatic gain controller 4
Being sent to modulation /demodulation combination function unit 5 afterwards carries out the demodulation of signal and the resolving of information.Modulation /demodulation combination function unit 5 exists
Two-way pumping station signal to sending and receiving calculates pseudo-range information after a series of activities such as carrying out capturing, tracking, measure, so
Afterwards by which is with our station and compares the pseudo range measurement information at station by system bus while issuing main control computer 6；Main control computer 6 is used as system
Control and data processing centre, on the one hand the working condition of control and monitoring system, on the other hand combines work(to modulation /demodulation
Can the data of the transmission of unit 5 carry out the calculating that rough error is picked out, carries out clock correction data after filtering, obtain two places clock correction, and show
Show in the user interface of display 7.
Another aspect of the present invention also discloses a kind of Two Way Satellite Time Transfer using the system to modulation /demodulation side
Method, in preferred embodiment as shown in Figure 2, the method comprising the steps of：
S1：The reference frequency signal of reception is converted to into local oscillation frequency signal and clock signal.Multichannel frequency synthesizer 1
The 10MHz reference frequency signals that external time frequency reference is provided are received, each module institute in output system is carried out after frequency synthesis
Local frequency, integer clock signal and the decimal clock signal for needing, the integer clock signal and decimal clock signal are used as tune
The phase place of the Time and frequency standard signal of system demodulation combination function unit 5, the integer clock signal and decimal clock signal is made an uproar
Acoustic performance requirement is higher, and the local frequency is L-band frequency, is that frequency mixer 2 and low-converter 3 are used.
S2：With the local oscillation frequency signal as reference, the reception signal for comparing station transmission is received, process obtains Low Medium Frequency letter
Number.The low-converter 3 receives the L-band satellite two-way pumping station signal of the up-conversion power amplifier output for comparing station, and will
Which is down-converted to low intermediate frequency signal, is sent to modulatedemodulate after being then adjusted to its output level by automatic gain controller 4
Combination function unit 5 is adjusted to carry out the demodulation of signal and the resolving of information.
S3：Receive pps pulse per second signal and the low intermediate frequency signal, with the clock signal as reference, obtain synthesizing it is low in
Frequency signal.After system is initial, pass through NTP/GNSS time service units 8 to system using ntp server or GNSS
Time service is carried out, the timestamp information of standard is provided for system, make our station and compare to realize second level time synchronized between station, receive the second
Pulse signal simultaneously synthesizes low intermediate frequency signal, then, the Low Medium Frequency data signal transmission that modulation /demodulation combination function unit 5 will synthesize
To frequency mixer 2.
S4：With the local oscillation frequency signal as reference, the low intermediate frequency signal of the synthesis is processed and obtains sending signal, and
Send to described and compare station.The low intermediate frequency signal of the synthesis is upconverted to by local L by the frequency mixer 2 of signal transmitting module
Band signal, sends to contrast station.
S5：The tracking reception signal and the sending signal, obtain pseudo range measurement information, so as to obtain two places clock correction.
Modulation /demodulation combination function unit 5 a series of works such as carries out capturing, tracks, measures in the two-way pumping station signal to sending and receiving
Pseudo-range information is calculated after work, and the pseudo range measurement information of our station and comparison station is issued into master control simultaneously by system bus then
Computer；Control and data processing centre of the main control computer as system, on the one hand control the working condition with monitoring system,
On the other hand carry out rough error to pick out, carry out after filtering to the pseudo range measurement information of the transmission of modulation /demodulation combination function unit 5
The calculating of clock correction data, obtains two places clock correction, and is displayed in the user interface of display 7.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms, all of embodiment cannot be exhaustive here, it is every to belong to this
Bright technical scheme it is extended obvious change or change still in protection scope of the present invention row.
Claims (10)
1. a kind of modulation demodulation system of Two Way Satellite Time Transfer pair, it is characterised in that the system includes：
Frequency reference module, for being converted to local oscillation frequency signal and clock signal by the foreign frequency reference signal of reception；
Signal receiving module, as reference, receives the reception signal for comparing station transmission, processes for the local oscillation frequency signal
To low intermediate frequency signal；
Signal processing module, for receiving pps pulse per second signal and the low intermediate frequency signal, with the clock signal as reference, obtains
The low intermediate frequency signal of synthesis；
Signal transmitting module, as reference, the low intermediate frequency signal of the synthesis is processed and is obtained for the local oscillation frequency signal
Sending signal, and send to the comparison station；
Main control module, for controlling the signal processing module tracking reception signal and the sending signal, obtains pseudorange
Metrical information, so that obtain two places clock correction.
2. system according to claim 1, it is characterised in that the frequency reference module includes multichannel frequency synthesizer,
The multichannel frequency synthesizer is used for receiving foreign frequency reference signal, and the reference frequency signal is converted to local frequency
Signal and clock signal.
3. system according to claim 1, it is characterised in that the signal receiving module includes low-converter and automatic gain
Controller, the low-converter are used for receiving the reception signal for comparing that station sends, and the reception signal is down-converted to Low Medium Frequency
Signal, the automatic gain controller are used for receiving the low intermediate frequency signal, after entering line level adjustment to the low intermediate frequency signal
Export to the signal processing module.
4. system according to claim 1, it is characterised in that the signal processing module includes modulation /demodulation combination function list
Unit and time service unit, the modulation /demodulation combination function unit are used for receiving the low intermediate frequency signal and outside pps pulse per second signal,
The low intermediate frequency signal for synthesizing is obtained, and the time service unit is used for standard time stamp being provided for the modulation /demodulation combination function unit
Information.
5. system according to claim 1, it is characterised in that the signal transmitting module includes frequency mixer, the frequency mixer
For receiving the low intermediate frequency signal of the synthesis of the signal processing module transmission, and by the low intermediate frequency signal of the synthesis
Frequency conversion obtains sending signal, and the sending signal is sent to comparison station.
6. system according to claim 1, it is characterised in that the main control module includes main control computer and display, the master
Control machine is used for tracking the reception signal and the sending signal, obtains pseudo range measurement information, so as to obtain two places clock correction, described
Display is used for showing the running status of the main control computer.
7. system according to claim 1, it is characterised in that the frequency reference module is for the foreign frequency base that will receive
Calibration signal is converted to the clock signal of the group of frequencies being made up of integer, decimal clock signal and local oscillation frequency signal.
8. system according to claim 1, it is characterised in that the signal receiving module and signal transmitting module are used for receiving
With the reception signal and the sending signal for sending L-band.
9. system according to claim 1, it is characterised in that the frequency reference module and the signal processing module are used for
Receive the reference frequency signal and the pps pulse per second signal of homologous coherent.
10. a kind of modulation-demo-demodulation method of Two Way Satellite Time Transfer pair, it is characterised in that the method comprising the steps of：
S1：The reference frequency signal of reception is converted to into local oscillation frequency signal and clock signal；
S2：With the local oscillation frequency signal as reference, the reception signal for comparing station transmission is received, process obtains low intermediate frequency signal；
S3：Pps pulse per second signal and the low intermediate frequency signal is received, with the clock signal as reference, the Low Medium Frequency letter for synthesizing is obtained
Number；
S4：With the local oscillation frequency signal as reference, the low intermediate frequency signal of the synthesis is processed and obtains sending signal, and sent
Station is compared to described；
S5：The tracking reception signal and the sending signal, obtain pseudo range measurement information, so as to obtain two places clock correction.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707306A (en) * | 2017-08-24 | 2018-02-16 | 北京无线电计量测试研究所 | A kind of two-way time synchronism apparatus of high-precision optical fiber |
| CN108134625A (en) * | 2017-12-11 | 2018-06-08 | 北京无线电计量测试研究所 | A kind of two-way satellite time and frequency transfer method |
| CN109039496A (en) * | 2018-08-23 | 2018-12-18 | 北京无线电计量测试研究所 | A kind of two-way pumping station modem Delay Variation aided measurement device and method |
| CN110471094A (en) * | 2019-07-17 | 2019-11-19 | 中国电子科技集团公司第五十四研究所 | It is a kind of to digitize the time Compare System and comparison method handled in real time |
| CN111338204A (en) * | 2020-05-15 | 2020-06-26 | 北京无线电计量测试研究所 | Decentralized integrated atomic time system and establishing method thereof |
| CN113489509A (en) * | 2021-07-06 | 2021-10-08 | 阎镜予 | Time-frequency synchronization method and device among large-scale GNSS pseudolites |
| CN114640375A (en) * | 2022-03-18 | 2022-06-17 | 北京无线电计量测试研究所 | Modem system for determining clock phase and using method |
| CN114900247A (en) * | 2021-12-29 | 2022-08-12 | 北京无线电计量测试研究所 | Intelligent testing arrangement that two-way comparison of two pseudo-codes |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3808365A (en) * | 1970-12-08 | 1974-04-30 | Gretag Ag | Method and apparatus for encoding and decoding messages |
| CN101251594A (en) * | 2008-04-03 | 2008-08-27 | 北京航空航天大学 | Bidirectional ranging and time comparision process terminal |
| CN103454911A (en) * | 2013-09-16 | 2013-12-18 | 中国航天科工集团第二研究院二〇三所 | Rough synchronization method for satellite bidirectional time comparison |
| CN104181550A (en) * | 2014-08-19 | 2014-12-03 | 北京无线电计量测试研究所 | Common view time and frequency transmitting method based on BeiDou navigation satellite system |
| CN104579530A (en) * | 2014-11-28 | 2015-04-29 | 中国电子科技集团公司第五十四研究所 | High-accuracy time unification and communication integrated device |
| CN104954093A (en) * | 2015-06-29 | 2015-09-30 | 北京无线电计量测试研究所 | High-precision remote time transmission system and method based on optical fibers |
-
2016
- 2016-09-27 CN CN201610856703.3A patent/CN106533529B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3808365A (en) * | 1970-12-08 | 1974-04-30 | Gretag Ag | Method and apparatus for encoding and decoding messages |
| CN101251594A (en) * | 2008-04-03 | 2008-08-27 | 北京航空航天大学 | Bidirectional ranging and time comparision process terminal |
| CN103454911A (en) * | 2013-09-16 | 2013-12-18 | 中国航天科工集团第二研究院二〇三所 | Rough synchronization method for satellite bidirectional time comparison |
| CN104181550A (en) * | 2014-08-19 | 2014-12-03 | 北京无线电计量测试研究所 | Common view time and frequency transmitting method based on BeiDou navigation satellite system |
| CN104579530A (en) * | 2014-11-28 | 2015-04-29 | 中国电子科技集团公司第五十四研究所 | High-accuracy time unification and communication integrated device |
| CN104954093A (en) * | 2015-06-29 | 2015-09-30 | 北京无线电计量测试研究所 | High-precision remote time transmission system and method based on optical fibers |
Non-Patent Citations (1)
| Title |
|---|
| 梁前熠: "《试验任务卫星通信系统》", 31 July 2016, 国防工业出版社 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107707306A (en) * | 2017-08-24 | 2018-02-16 | 北京无线电计量测试研究所 | A kind of two-way time synchronism apparatus of high-precision optical fiber |
| CN108134625B (en) * | 2017-12-11 | 2020-09-01 | 北京无线电计量测试研究所 | Satellite bidirectional time frequency transmission method |
| CN108134625A (en) * | 2017-12-11 | 2018-06-08 | 北京无线电计量测试研究所 | A kind of two-way satellite time and frequency transfer method |
| CN109039496A (en) * | 2018-08-23 | 2018-12-18 | 北京无线电计量测试研究所 | A kind of two-way pumping station modem Delay Variation aided measurement device and method |
| CN109039496B (en) * | 2018-08-23 | 2021-06-29 | 北京无线电计量测试研究所 | Auxiliary measurement device and method for time delay change of bidirectional comparison modem |
| CN110471094A (en) * | 2019-07-17 | 2019-11-19 | 中国电子科技集团公司第五十四研究所 | It is a kind of to digitize the time Compare System and comparison method handled in real time |
| CN111338204A (en) * | 2020-05-15 | 2020-06-26 | 北京无线电计量测试研究所 | Decentralized integrated atomic time system and establishing method thereof |
| CN113489509A (en) * | 2021-07-06 | 2021-10-08 | 阎镜予 | Time-frequency synchronization method and device among large-scale GNSS pseudolites |
| CN113489509B (en) * | 2021-07-06 | 2023-05-26 | 上海方位角数据科技有限公司 | Time-frequency synchronization method and device between large-scale GNSS pseudolites |
| CN114900247A (en) * | 2021-12-29 | 2022-08-12 | 北京无线电计量测试研究所 | Intelligent testing arrangement that two-way comparison of two pseudo-codes |
| CN114900247B (en) * | 2021-12-29 | 2024-03-29 | 北京无线电计量测试研究所 | Intelligent testing device for double pseudo code bidirectional comparison |
| CN114640375A (en) * | 2022-03-18 | 2022-06-17 | 北京无线电计量测试研究所 | Modem system for determining clock phase and using method |
| CN114640375B (en) * | 2022-03-18 | 2023-12-26 | 北京无线电计量测试研究所 | Clock phase determination modem system and use method |
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