CN106597488B - A kind of relay type pseudo satellite, pseudolite clock synchronization system and method based on pilot signal - Google Patents
A kind of relay type pseudo satellite, pseudolite clock synchronization system and method based on pilot signal Download PDFInfo
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- CN106597488B CN106597488B CN201611114647.2A CN201611114647A CN106597488B CN 106597488 B CN106597488 B CN 106597488B CN 201611114647 A CN201611114647 A CN 201611114647A CN 106597488 B CN106597488 B CN 106597488B
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- signal
- high band
- pseudolite
- pilot signal
- frequency
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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
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses a kind of pseudo satellite, pseudolite pilot signal application method, system of the invention includes pseudolite transmitter, multiple high band directional transmitting antennas, multiple high band directional receiving antennas, multiple signal repeaters and the multiple L frequency range directional transmitting antenna for being located at ground；Pseudolite transmitter includes high band navigation signal generation module and pilot signal generation module, and the signal directional transmissions that high band directional transmitting antenna generates pseudolite transmitter give corresponding signal converter；High band directional receiving antenna receives the signal of pseudolite transmitter transmitting；The high band navigation signal received is down-converted to L-band navigation signal simultaneously by multiple signal adapters；The L-band navigation signal that signal adapter exports is emitted to service area by L frequency range directional transmitting antenna, improves the timing tracking accuracy and positioning accuracy of entire relay type pseudolite systems.
Description
Technical field
The present invention relates to outdoor navigation signal enhancing positioning and signal communication field, especially one is a kind of based on pilot signal
Relay type pseudo satellite, pseudolite time synchronization implementation system.
Background technique
Pseudo satellite, pseudolite is a kind of transmitter for emitting space-like navigation signal positioned at ground, can be overcome in high mountain, gorge
The outdoor area such as paddy and built-up city, space navigation signal by serious are blocked that receiver is made to cannot achieve navigation
And orientation problem, but pseudolite systems timing tracking accuracy is not high all the time, causes pseudolite positioning precision lower, Wu Faman
The demand of sufficient high accuracy positioning.Pilot signal transmission principle is by desired signal by launching after certain modulation system,
Realize the wireless transmission and use of signal.
For these reasons, a kind of relay type pseudo satellite, pseudolite time synchronization implementation system based on pilot signal is needed, is forwarded
High band navigation signal and clock signal are emitted to multiple transponders of eminence by the ground transmitter of formula pseudo satellite, pseudolite, wherein clock
Signal is emitted by way of pilot tone, realizes that multiple transponders share the same clock signal,
Entire relay type pseudolite systems timing tracking accuracy is improved, guarantees receiver fast Acquisition.
Summary of the invention
The relay type pseudo satellite, pseudolite time synchronization implementation system based on pilot signal that the object of the present invention is to provide a kind of is realized
The quick obtaining of clock signal improves relay type pseudolite systems timing tracking accuracy, and some areas is overcome to believe because of space navigation
Number serious shielding and the problem of can not position, and receiver acquisition speed can be improved.
In order to achieve the above object, the technical scheme of the present invention is realized as follows:
A kind of relay type pseudo satellite, pseudolite clock synchronization system based on pilot signal, the pseudo satellite, pseudolite for being located at ground including one are sent out
Penetrate machine and multiple high band directional transmitting antennas, which is characterized in that further include multiple high band directional receiving antennas, multiple signals
Transponder and multiple L frequency range directional transmitting antennas；Pseudolite transmitter generate multiple channels high band navigation signal and one
It is loaded with the pilot signal of clock information, high band navigation signal and pilot signal is same by multiple high band directional transmitting antennas
When emit；All signal repeaters receive high band navigation signal simultaneously by respective high band directional receiving antenna and lead
Frequency signal, extracts clock signal from pilot signal, will be under the high band navigation signal that received under clock signal driving
It is converted to L frequency range navigation signal, service area is sent by respective L frequency range directional transmitting antenna by L frequency range navigation signal.
Wherein, the signal repeater includes frequency-variable module and frequency track module, pilot signal of the frequency track module from input
In extract clock signal, be conveyed to frequency-variable module；Frequency-variable module is driven by the clock signal to turn high band navigation signal
It is down-converted to L frequency range navigation signal.
Wherein, the pseudolite transmitter includes high band navigation signal generation module and pilot signal generation module,
High band navigation signal generation module is used to generate the high band navigation signal in multiple channels；Pilot signal generation module is for producing
The raw pilot signal for being loaded with clock information.
Wherein, each high band directional transmitting antenna respectively between each corresponding high band directional receiving antenna away from
From equal.
A kind of relay type pseudo satellite, pseudolite method for synchronizing time based on pilot signal, which comprises the steps of:
Step 1: the pseudolite transmitter positioned at ground generates the high band navigation signal and a pilot tone letter in multiple channels
Number, high band navigation signal and pilot signal are emitted simultaneously by multiple high band directional transmitting antennas；
Step 2: all signal repeaters receive high band navigation by respective high band directional receiving antenna simultaneously
Signal and pilot signal, extract clock signal from pilot signal, lead the high band received under clock signal driving
Boat signal is down-converted to L frequency range navigation signal；
Step 3: all signal repeaters emit L frequency range navigation signal by respective L frequency range directional transmitting antenna
To service area.
Wherein, step 2 specifically includes the following steps:
(201) all signal repeaters receive high band navigation letter by respective high band directional receiving antenna simultaneously
Number and pilot signal, high band navigation signal and pilot signal are exported to the frequency track module and frequency-variable module of signal repeater；
(202) the frequency track module of signal repeater extracts clock signal from pilot signal, is conveyed to frequency-variable module；
(203) frequency-variable module completes high band navigation signal to the conversion of L frequency range navigation signal under clock signal driving.
Wherein, each high band directional transmitting antenna respectively between each corresponding high band directional receiving antenna away from
From equal.
The technology of the present invention has the advantages that
(i) the relay type pseudo satellite, pseudolite time synchronization implementation system based on pilot signal that the invention proposes a kind of, by ground
Clock signal is wirelessly distributed to multiple transponders, ensure that transponder to the quick obtaining and relay type of clock signal
Pseudolite systems are total to the same clock signal, improve the timing tracking accuracy of relay type pseudolite systems, and then improve and turn
Hairdo pseudolite positioning precision and service ability.
(ii) the relay type pseudo satellite, pseudolite time synchronization implementation system based on pilot signal that the invention proposes a kind of, in high frequency
Section directional receiving antenna is away from corresponding high band directional receiving antenna, it can be achieved that all transponders while work under same case
Make, guarantees entire pseudolite systems time consistency.
Detailed description of the invention
Fig. 1 is relay type pseudolite systems structure and operation principle schematic diagram of the present invention；
Fig. 2 is that a kind of relay type pseudo satellite, pseudolite transponder high band of the present invention navigates to L frequency range navigation signal transition diagram；
Fig. 3 is a kind of relay type pseudo satellite, pseudolite pilot signal extracting mode schematic diagram of the present invention；
Fig. 4 is a kind of relay type pseudo satellite, pseudolite pilot signal implementation method flow chart of the present invention.
Specific embodiment
The present invention will be further described with attached drawing combined with specific embodiments below:
Fig. 1 is a kind of relay type pseudo satellite, pseudolite time synchronization implementation system schematic based on pilot signal of the present invention, including
One is located at the pseudolite transmitter on ground, multiple high band directional transmitting antennas, multiple high band directional receiving antennas, multiple
Signal repeater and multiple L frequency range directional transmitting antennas；Pseudolite transmitter generate multiple channels high band navigation signal and
One is loaded with the pilot signal of clock information, and high band navigation signal and pilot signal are passed through multiple high band directional transmissions day
Line emits simultaneously；All signal repeaters receive high band navigation signal by respective high band directional receiving antenna simultaneously
And pilot signal, clock signal is extracted from pilot signal, and the high band received navigates under clock signal driving and believes
Number it is down-converted to L frequency range navigation signal, service is sent by respective L frequency range directional transmitting antenna by L frequency range navigation signal
Area.And each high band directional transmitting antenna is equal with the distance between each corresponding high band directional receiving antenna respectively.
The pseudolite transmitter includes high band navigation signal generation module and pilot signal generation module, high band
Navigation signal generation module is used to generate the high band navigation signal in multiple channels；Pilot signal generation module is loaded with for generating
The pilot signal of clock information.
Fig. 2 is signal repeater operation principle schematic diagram, and the signal repeater includes frequency-variable module and frequency track module,
Frequency track module extracts clock signal from the pilot signal of input, is conveyed to frequency-variable module；Frequency-variable module is in clock signal
High band navigation signal is turned under driving to be down-converted to L frequency range navigation signal.
Fig. 3 is signal repeater frequency track modular structure and working principle diagram, and the frequency track module is by phase discriminator, low pass filtered
Wave device (LF), voltage controlled oscillator (VCO) and frequency multiplier are constituted, and are modulated with clock signal high band pilot signal through phase discriminator and LF
An error signal is generated afterwards, and error signal inputs VCO, and the clock signal of modulation clock signal, output is fed back through frequency multiplication to mirror
In phase device, when error signal is 0, loop-locking obtains stable clock signal.
Fig. 4 is a kind of relay type pseudo satellite, pseudolite time synchronization implementation working-flow figure based on pilot signal of the present invention,
Steps are as follows:
Step 1: the pseudolite transmitter positioned at ground generates the high band navigation signal and a pilot tone letter in multiple channels
Number, high band navigation signal and pilot signal are emitted simultaneously by multiple high band directional transmitting antennas；
Step 2: all signal repeaters receive high band navigation by respective high band directional receiving antenna simultaneously
Signal and pilot signal, extract clock signal from pilot signal, lead the high band received under clock signal driving
Boat signal is down-converted to L frequency range navigation signal；
Specifically includes the following steps:
(201) all signal repeaters receive high band navigation letter by respective high band directional receiving antenna simultaneously
Number and pilot signal, high band navigation signal and pilot signal are exported to the frequency track module and frequency-variable module of signal repeater；
(202) the frequency track module of signal repeater extracts clock signal from pilot signal, is conveyed to frequency-variable module；
(203) frequency-variable module completes high band navigation signal to the conversion of L frequency range navigation signal under clock signal driving.
Step 3: all signal repeaters emit L frequency range navigation signal by respective L frequency range directional transmitting antenna
To service area.
The above, a specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto, at this
It invents in the technical scope disclosed, it will be appreciated that the transformation expected should all be covered in scope of the invention.
Claims (7)
1. a kind of relay type pseudo satellite, pseudolite clock synchronization system based on pilot signal, the pseudo satellite, pseudolite for being located at ground including one emits
Machine and multiple high band directional transmitting antennas, which is characterized in that further include multiple high band directional receiving antennas, multiple signals turn
Send out device and multiple L frequency range directional transmitting antennas；Pseudolite transmitter generates the high band navigation signal and a load in multiple channels
There is the pilot signal of clock information, simultaneously by multiple high band directional transmitting antennas by high band navigation signal and pilot signal
Transmitting；All signal repeaters receive high band navigation signal and pilot tone by respective high band directional receiving antenna simultaneously
Signal extracts clock signal from pilot signal, will become under the high band navigation signal received under clock signal driving
Frequency arrives L frequency range navigation signal, sends service area by respective L frequency range directional transmitting antenna for L frequency range navigation signal.
2. a kind of relay type pseudo satellite, pseudolite clock synchronization system based on pilot signal according to claim 1, feature
Be: the signal repeater includes frequency-variable module and frequency track module, and frequency track module is extracted from the pilot signal of input
Clock signal is conveyed to frequency-variable module；Frequency-variable module is driven by the clock signal to be turned high band navigation signal to be down-converted to L
Frequency range navigation signal.
3. a kind of relay type pseudo satellite, pseudolite clock synchronization system based on pilot signal according to claim 1, feature
Be: the pseudolite transmitter includes high band navigation signal generation module and pilot signal generation module, and high band is led
Boat signal generation module is used to generate the high band navigation signal in multiple channels；When pilot signal generation module is loaded with for generating
The pilot signal of clock information.
4. a kind of relay type pseudo satellite, pseudolite clock synchronization system based on pilot signal according to claim 1, feature
Be: each high band directional transmitting antenna is equal with the distance between each corresponding high band directional receiving antenna respectively.
5. a kind of relay type pseudo satellite, pseudolite method for synchronizing time based on pilot signal, which comprises the steps of:
Step 1: the pseudolite transmitter positioned at ground generates the high band navigation signal and a pilot signal in multiple channels, will
High band navigation signal and pilot signal are emitted simultaneously by multiple high band directional transmitting antennas；
Step 2: all signal repeaters receive high band navigation signal by respective high band directional receiving antenna simultaneously
And pilot signal, clock signal is extracted from pilot signal, and the high band received navigates under clock signal driving and believes
Number it is down-converted to L frequency range navigation signal；
Step 3: L frequency range navigation signal is emitted to clothes by respective L frequency range directional transmitting antenna by all signal repeaters
Be engaged in area.
6. a kind of relay type pseudo satellite, pseudolite method for synchronizing time based on pilot signal according to claim 5, feature
Be, step 2 specifically includes the following steps:
(201) all signal repeaters by respective high band directional receiving antenna simultaneously receive high band navigation signal and
Pilot signal exports high band navigation signal and pilot signal to the frequency track module and frequency-variable module of signal repeater；
(202) the frequency track module of signal repeater extracts clock signal from pilot signal, is conveyed to frequency-variable module；
(203) frequency-variable module completes high band navigation signal to the conversion of L frequency range navigation signal under clock signal driving.
7. a kind of relay type pseudo satellite, pseudolite method for synchronizing time based on pilot signal according to claim 5, feature
Be: each high band directional transmitting antenna is equal with the distance between each corresponding high band directional receiving antenna respectively.
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| CN201611114647.2A CN106597488B (en) | 2016-12-07 | 2016-12-07 | A kind of relay type pseudo satellite, pseudolite clock synchronization system and method based on pilot signal |
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|---|---|---|---|
| CN201611114647.2A CN106597488B (en) | 2016-12-07 | 2016-12-07 | A kind of relay type pseudo satellite, pseudolite clock synchronization system and method based on pilot signal |
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| CN106597488A CN106597488A (en) | 2017-04-26 |
| CN106597488B true CN106597488B (en) | 2019-02-15 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110221318A (en) * | 2019-03-18 | 2019-09-10 | 上海微小卫星工程中心 | A kind of satellite antenna and satellite navigation signal enhancement method |
| CN111245502B (en) * | 2020-01-17 | 2022-10-04 | 中国科学院国家授时中心 | Multimode pseudolite system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062895A (en) * | 2014-06-26 | 2014-09-24 | 桂林电子科技大学 | Pseudolite time synchronization method and positioning method thereof |
| CN104035068B (en) * | 2014-06-26 | 2016-09-14 | 桂林电子科技大学 | A kind of indoor locating system based on pseudo satellite, pseudolite and method |
-
2016
- 2016-12-07 CN CN201611114647.2A patent/CN106597488B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062895A (en) * | 2014-06-26 | 2014-09-24 | 桂林电子科技大学 | Pseudolite time synchronization method and positioning method thereof |
| CN104035068B (en) * | 2014-06-26 | 2016-09-14 | 桂林电子科技大学 | A kind of indoor locating system based on pseudo satellite, pseudolite and method |
Non-Patent Citations (1)
| Title |
|---|
| 基于伪卫星的变形监测系统研究;伍秋;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20150115(第01期);第C038-119页 |
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