CN109188477A - A kind of spatially distributed phase-locked system - Google Patents

A kind of spatially distributed phase-locked system Download PDF

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Publication number
CN109188477A
CN109188477A CN201810951936.0A CN201810951936A CN109188477A CN 109188477 A CN109188477 A CN 109188477A CN 201810951936 A CN201810951936 A CN 201810951936A CN 109188477 A CN109188477 A CN 109188477A
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China
Prior art keywords
frequency
unit
radio
phase
master unit
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810951936.0A
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Chinese (zh)
Inventor
王韬
万其昌
蔺鑫
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Chongqing University
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Chongqing University
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Priority to CN201810951936.0A priority Critical patent/CN109188477A/en
Publication of CN109188477A publication Critical patent/CN109188477A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • G01S19/43—Determining position using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry

Abstract

The invention discloses a kind of spatially distributed phase-locked systems.It is f that master unit 1, which generates frequency,R1Radio-frequency carrier signal, it is f that frequency is obtained after relevant frequency converterR2Radio-frequency carrier signal；Master unit 1 to from 2 tranmitting frequency of unit be fR1Radio-frequency carrier signal, receive the signal from unit 2, by the frequency converter that is concerned with, the first adjustable phase shifter, it is f that carrier frequency is obtained after the second adjustable phase shifter and modulatorR2Radio frequency modulated signal, be transmitted to master unit 1；1 comparison frequency of master unit is fR2Radio-frequency carrier signal and from unit 2 forward carrier frequency be fR2Radio frequency modulated signal between carrier phase difference, which is emitted to from unit 2, is adjusted from the first adjustable phase shifter and the second adjustable phase shifter of unit 2, the phase difference is made to level off to 0；Frequency caused by master unit 1 is fR2Radio-frequency carrier signal with to obtain frequency after relevant frequency converter and the first adjustable phase shifter from unit 2 be fR2Radio-frequency carrier signal with the same phase of frequency.

Description

A kind of spatially distributed phase-locked system
Technical field
The invention belongs to Satellite observation technical fields, are related to a kind of spatially distributed phase-locked system.
Background technique
Although every satellite is independent from each other in structure, without physical connection, multi-satellite shape after forming into columns At distributed networked research center can be equivalent to a virtual super large satellite system, the remote super every satellite of the function of being played It is simple to be added.
Distributed networked research center has a lot of advantages, most typical advantage be to solve super large satellite launch problem and Large scale structure Space configuration problem, thus in multistation/multistatic SARS, the systems such as distributed satellites solar power station In have extremely important application value.But distributed networked research center also brings the technical problem of urgent need to resolve, multi-satellite It needs to cooperate, it is desirable that wirelessly realize long-range Phase synchronization, generate on each satellite micro- with being concerned with for phase with frequency Wave source.Mostly use atomic clock system at this stage to solve this problem, but atomic clock system involves great expense, unsuitable high-volume makes With.
Summary of the invention
In view of this, the present invention proposes a kind of spatially distributed phase-locked system, provide the following technical solutions:
The invention discloses a kind of spatially distributed phase-locked systems.A kind of spatially distributed phase-locked system is by leading Unit 1 and it is multiple constituted from unit 2, master unit 1 and be located on every satellite from unit 2；It is f that master unit 1, which generates frequency,R1 Radio-frequency carrier signal, it is f that frequency is obtained after relevant frequency converterR2Radio-frequency carrier signal；Master unit 1 is sent out to from unit 2 Radio frequency rate is fR1Radio-frequency carrier signal, receiving the frequency that launches of master unit 1 from unit 2 is fR1Radio-frequency carrier signal, By the frequency converter that is concerned with, the first adjustable phase shifter, it is f that carrier frequency is obtained after the second adjustable phase shifter and modulatorR2Radio frequency Modulated signal is transmitted to master unit 1；It is f that master unit 1, which compares its frequency,R2Radio-frequency carrier signal and from unit 2 forward carrier wave Frequency is fR2Radio frequency modulated signal between carrier phase difference, which is emitted to from unit 2, is constantly regulate from unit 2 the first adjustable phase shifter and the second adjustable phase shifter makes the phase difference level off to 0 always；Frequency caused by master unit 1 is fR2Radio-frequency carrier signal with to obtain frequency after relevant frequency converter and the first adjustable phase shifter from unit 2 be fR2Radio frequency Carrier signal is the same as the same phase of frequency.
The beneficial effects of the present invention are: (1) of the present invention master unit from from unit hair receipts signal frequency different, realize hair Channel isolation is received, hair is reduced and receives crosstalk；(2) the phase difference adjusting between master-slave unit of the present invention is automatically performed, the phase difference Do not change with distance change between distributed satellites；(3) invention introduces signal modulation function, realize it is multiple from unit with Master unit Phase synchronization；(4) master-slave unit of the present invention is not necessarily to connect by coaxial cable or optical fiber, can be not only used for spatial distribution Formula communication/radar system can also be used for ground distributor cloth communication/radar system.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out Illustrate:
Fig. 1 is circuit system structural block diagram of the invention；
Specific embodiment
Below in conjunction with attached drawing, a preferred embodiment of the present invention will be described in detail.
Fig. 1 is circuit structure block diagram of the invention.As shown in Figure 1, a kind of spatially distributed phase-locked system is by main list Member 1 and it is multiple constituted from unit 2, master unit 1 and be located on every satellite from unit 2, the output 18 of master unit 1 and from list The radio-frequency carrier signal that the output 211 of member 2 is exported is the same as the same phase of frequency.
Master unit 1 by RF local oscillator source 11, circulator 12, first antenna 13, relevant frequency converter 14, phase comparator 15, Wireless sending module 16, the second antenna 17 are constituted.
From unit 2 by first antenna 21, circulator 22, relevant frequency converter 23, the first adjustable phase shifter 24, the second adjustable shifting Phase device 25, modulator 26, from unit marks signal source 27, the second antenna 28, wireless receiving module 29,210 structure of loop filter At.
It is f that RF local oscillator source 11, which generates frequency,R1Radio-frequency carrier signal s11(t) are as follows:
s11(t)=cos (2 π fR1t+φR1) (formula 1)
Generating frequency using relevant frequency converter 14 is fR2Radio-frequency carrier signal s14(t) are as follows:
s14(t)=cos (2 π fR2t+φR2) (formula 2)
Define frequency conversion ratio are as follows:φR2=k φR1.Relevant frequency converter can be locking phase frequency converter or frequency multiplier.
The radio-frequency carrier signal s of master unit 111(t) it after circulator 12, is radiated using first antenna 13 to from unit 2, Assuming that master unit 1 and from the distance between unit 2 be di；The signal s then received from the first antenna 21 of unit 221(t) it is
C is propagation velocity of electromagnetic wave in above formula.
From the relevant frequency converter 23 of unit 2 to received signal s21(t) the signal s obtained after relevant frequency conversion is carried out23(t) Are as follows:
Assuming that the phase-shift phase of the first adjustable phase shifter 24 and the second adjustable phase shifter 25 is φai, the first adjustable phase shifter 24 output signal s24(t) are as follows:
The output signal s of second adjustable phase shifter 2525(t) are as follows:
The id signal s generated from unit marks signal source 2727It (t) can be the low frequency sine wave signal of different frequency, or The orthogonal pseudo noise code signal of person, it is different from unit 2 for distinguishing identifier.
Assuming that id signal s27(t) it is low frequency sine wave signal:
s27(t)=cos (2 π fit+φi) (formula 7)
Use id signal s27(t) to the output signal s of the second adjustable phase shifter 2525(t) it is modulated, obtains radio frequency Modulated signal s26(t) are as follows:
This modulated signal s26(t) first antenna 21 is given by circulator 22 to radiate to master unit 1.
The signal s that the slave unit 2 that the first antenna 13 of master unit 1 receives forwards13(t) are as follows:
The phase comparator 15 of master unit 1 compares s14(t) and s13(t), the phase difference of radio-frequency carrier signal is obtained12Are as follows:
This phase difference is sent to the second antenna 17 by wireless transmitter module 16 to radiate to from unit 2.From the second of unit 2 Antenna 28 receives this signal, recovers phase difference by wireless receiving module 2912, generated by loop filter 210 adjustable The control voltage signal of phase shifter constantly regulate the amount of phase shift phi of the first adjustable phase shifter 24 and the second adjustable phase shifter 25ai, make Phase difference12Always 0 is leveled off to.
The output signal s of master unit 118(t) are as follows:
s18(t)=s14(t)=cos (2 π fR2t+φR2) (formula 11)
From the output signal s of unit 2211(t) are as follows:
Phase difference between the two are as follows:
φ12Level off to 0,Also 0 is leveled off to.The output signal s of master unit 118(t) with output signal s from unit 2211 (t) the long-range Phase synchronization between spatially distributed unit is realized for the microwave source that is concerned with the same phase of frequency.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention rather than limits, although logical It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be Various changes are made to it in form and in details, without departing from claims of the present invention limited range.

Claims (3)

1. a kind of spatially distributed phase-locked system, it is characterised in that: a kind of spatially distributed phase-locked system is by main list It is first (1) and multiple from unit (2) composition, it master unit (1) and is located on every satellite from unit (2)；Master unit (1) generates Frequency is fR1Radio-frequency carrier signal, it is f that frequency is obtained after relevant frequency converterR2Radio-frequency carrier signal；Master unit (1) To from unit (2) tranmitting frequency be fR1Radio-frequency carrier signal, receiving master unit (1) frequency for launching from unit (2) is fR1Radio-frequency carrier signal, by the frequency converter that is concerned with, the first adjustable phase shifter is carried after the second adjustable phase shifter and modulator Wave frequency rate is fR2Radio frequency modulated signal, be transmitted to master unit (1)；It is f that master unit (1), which compares its frequency,R2Radio-frequency carrier letter Number and from unit (2) forward carrier frequency be fR2Radio frequency modulated signal between carrier phase difference, by the phase difference to from Unit (2) transmitting, constantly regulate the first adjustable phase shifter and the second adjustable phase shifter from unit (2), makes the phase difference always Level off to 0；Frequency caused by master unit (1) is fR2Radio-frequency carrier signal with from unit (2) by relevant frequency converter and the It is f that frequency is obtained after one adjustable phase shifterR2Radio-frequency carrier signal with the same phase of frequency, realize long-range Phase synchronization.
2. a kind of spatially distributed phase-locked system according to claim 1, it is characterised in that: the master unit (1) by RF local oscillator source (11), circulator (12), first antenna (13), relevant frequency converter (14), phase comparator (15), nothing Line sending module (16), the second antenna (17) are constituted.
3. a kind of spatially distributed phase-locked system according to claim 1, it is characterised in that: described from unit (2) by first antenna (21), circulator (22), relevant frequency converter (23), the first adjustable phase shifter (24), the second adjustable phase shifter (25), modulator (26), from unit marks signal source (27), the second antenna (28), wireless receiving module (29), loop filter (210) it constitutes.
CN201810951936.0A 2018-08-21 2018-08-21 A kind of spatially distributed phase-locked system Pending CN109188477A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111756446A (en) * 2020-05-19 2020-10-09 清华大学 Phase absolute synchronization system and method based on optical fiber transmission

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CN103533632A (en) * 2013-10-09 2014-01-22 清华大学 Free space frequency signal transmission system based on phase compensation
WO2014083725A1 (en) * 2012-11-29 2014-06-05 日本電気株式会社 Synchronization apparatus, synchronization system, wireless communication apparatus and synchronization method
CN104022990A (en) * 2014-06-20 2014-09-03 哈尔滨工业大学 Distributed beam forming carrier phase synchronization method based on sea wireless sensor network
CN104038245A (en) * 2013-02-04 2014-09-10 优倍快网络公司 Radio devices for transmitting wireless signal
CN104168017A (en) * 2014-08-14 2014-11-26 浙江大学 Phase synchronous system between uniform-motion wireless systems
CN105577352A (en) * 2015-12-11 2016-05-11 浙江大学 Digitalization remote phase synchronization method and system achieved based on phase domains
CN106357320A (en) * 2015-07-16 2017-01-25 中兴通讯股份有限公司 Satellite ground station transceiver and satellite communication system
CN106597362A (en) * 2016-11-28 2017-04-26 北京无线电测量研究所 Signal phase synchronization apparatus and method for radar base station
CN209102911U (en) * 2018-08-21 2019-07-12 重庆大学 A kind of spatially distributed phase-locked system

Patent Citations (10)

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Publication number Priority date Publication date Assignee Title
WO2014083725A1 (en) * 2012-11-29 2014-06-05 日本電気株式会社 Synchronization apparatus, synchronization system, wireless communication apparatus and synchronization method
CN104038245A (en) * 2013-02-04 2014-09-10 优倍快网络公司 Radio devices for transmitting wireless signal
CN103384194A (en) * 2013-07-11 2013-11-06 浙江大学 Phase synchronization system of spatial distribution unit
CN103533632A (en) * 2013-10-09 2014-01-22 清华大学 Free space frequency signal transmission system based on phase compensation
CN104022990A (en) * 2014-06-20 2014-09-03 哈尔滨工业大学 Distributed beam forming carrier phase synchronization method based on sea wireless sensor network
CN104168017A (en) * 2014-08-14 2014-11-26 浙江大学 Phase synchronous system between uniform-motion wireless systems
CN106357320A (en) * 2015-07-16 2017-01-25 中兴通讯股份有限公司 Satellite ground station transceiver and satellite communication system
CN105577352A (en) * 2015-12-11 2016-05-11 浙江大学 Digitalization remote phase synchronization method and system achieved based on phase domains
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CN209102911U (en) * 2018-08-21 2019-07-12 重庆大学 A kind of spatially distributed phase-locked system

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Publication number Priority date Publication date Assignee Title
CN111756446A (en) * 2020-05-19 2020-10-09 清华大学 Phase absolute synchronization system and method based on optical fiber transmission

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