CN106125104A - GNSS receiver self adaptation catching method - Google Patents
GNSS receiver self adaptation catching method Download PDFInfo
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- CN106125104A CN106125104A CN201610723494.5A CN201610723494A CN106125104A CN 106125104 A CN106125104 A CN 106125104A CN 201610723494 A CN201610723494 A CN 201610723494A CN 106125104 A CN106125104 A CN 106125104A
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- satellite
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- capture
- star
- navigation system
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Classifications
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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
Abstract
The invention belongs to Satellite Navigation Technique, relate to a kind of GNSS receiver self adaptation catching method.The method is: arranges in the capture engine software system of system and selects star function, capture parameter to arrange function and signal intensity estimation function；Select star function to select satellite feeding capture parameter and function is set, capture parameter arranges function and design parameter is sent into the trapping module of system, being returned result to signal intensity estimation function by sheriff's module, signal intensity estimation function judges to continue capture, or star function is selected in return.The present invention, by the optimization to acquiring satellite algorithm, is effectively improved the blind speed caught of GNSS receiver, avoids the error capture under GNSS receiver height signal simultaneously.
Description
Technical field
The invention belongs to Satellite Navigation Technique, relate to a kind of GNSS receiver self adaptation catching method.
Background technology
GNSS receiver, according to its workflow, can be generally divided into three parts, RF front-end module, base band signal process
Module and positioning navigation module.The function of baseband signal processing module is: believe by processing the digital intermediate frequency of radio-frequency front-end output
Number, reappear the local carrier consistent with satellite-signal and pseudo-code, reach the capture to GNSS signal and tracking, and then extract original
Observed quantity and original text.In baseband signal processing module, capture is it is critical that a step, the most first captures signal,
Tracking after having.Blind catching refers to capture signal in the case of not having any effective ephemeris and almanac.The GNSS of prior art
Receiver, blind catches highly sensitive, and the speed of capture is very slow, and has the phenomenon of high signal error capture；And blind catch fireballing, catch
Obtain sensitivity the highest.
Summary of the invention
The technical problem to be solved is to provide and a kind of can the GNSS of self adaptation different system satellite-signal connect
Receipts machine self adaptation catching method so that it is acquisition speed can be improved, it is also possible to keep away on the premise of ensureing original acquisition sensitivity
Exempt from the phenomenon of high signal error capture.
The GNSS receiver self adaptation catching method of the present invention is: arranges in the capture engine software system of system and selects star
Function, capture parameter arrange function and signal intensity estimation function；Select star function to select satellite feeding capture parameter and function be set,
Capture parameter arranges function and design parameter is sent into the trapping module of system, sheriff's module return result to signal intensity and estimate
Function, signal intensity estimation function judges to continue capture, or star function is selected in return.
Described select star function processing method be: blind catch the first round and only capture five GEO of Beidou satellite navigation system and defend
Star, and use short integration Fast tracking/pull-in/fast pull-in mode；If acquisition success, illustrate to receive satellite all right, then start to distribute big-dipper satellite and lead
The non-GEO satellite of boat system and the satellite of other satellite navigation system, the pattern of capture is constant, completes blind catching；If capturing unsuccessfully,
Then start long integration high sensitivity acquisition mode, the most first capture five GEO satellite of Beidou satellite navigation system, the Big Dipper of reallocating
The non-GEO satellite of satellite navigation system and other satellite navigation system satellite, ensure that original acquisition sensitivity.
The processing method that described capture parameter arranges function is: the Doppler divided for different satellite navigation systems
Block, only searches for one piece of Doppler's block in bosom to the GEO star of Beidou satellite navigation system, Beidou satellite navigation system non-
GEO star then searches for three pieces, the satellite acquisition of other satellite navigation system five pieces；After all satellite acquisitions are gone over, do not capture
To star change into again searching for five pieces.
The processing method of described signal intensity estimation function is: when trapping module returns successfully, if result is beyond capture
The half of thresholding, the most next time capture command；According to the Doppler results returned, search for adjacent one piece Doppler's block；Deng
Capture result when again returning to, compares two times result, the biggest for final result；When trapping module returns successfully,
If result is without departing from the half of detection threshold, the most do not search again for this satellite.
The present invention, by the optimization to acquiring satellite algorithm, is effectively improved the blind speed caught of GNSS receiver, simultaneously
Avoid the error capture under GNSS receiver height signal.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the embodiment of the present invention.
Detailed description of the invention
As it can be seen, this GNSS receiver self adaptation catching method is: arrange in the capture engine software system of system
Select star function, capture parameter that function and signal intensity estimation function are set；Select star function to select satellite and send into capture parameter setting
Function, capture parameter arranges function and design parameter is sent into the trapping module of system, sheriff's module returns result to signal strong
Degree estimation function, signal intensity estimation function judges to continue capture, or star function is selected in return.
The processing method selecting star function is: blind do not have any effective ephemeris and almanac when catching, it is impossible to extrapolates visible satellite,
But owing to Big Dipper GEO satellite whole day is visible, catch the first round only capture five GEO satellite of Beidou satellite navigation system so blind,
And use short integration Fast tracking/pull-in/fast pull-in mode；If acquisition success, illustrate to receive satellite all right, then start to distribute Beidou satellite navigation system
The non-GEO satellite of system and the satellite of other satellite navigation system, the pattern of capture is constant, completes blind catching；If capturing unsuccessfully, then open
Dynamic long integration high sensitivity acquisition mode, the most first captures five GEO satellite of Beidou satellite navigation system, big-dipper satellite of reallocating
The non-GEO satellite of navigation system and other satellite navigation system satellite, ensure that original acquisition sensitivity.
Capture parameter arranges the processing method of function: owing to big-dipper satellite is the least, and gps satellite is the biggest,
The Doppler's block every time searched for for different system to do corresponding adjustment.As a example by the Doppler of positive and negative 5k, Doppler's block is total
It is divided into five pieces.The Doppler's block divided for different satellite navigation systems, only searches the GEO star of Beidou satellite navigation system
One piece of Doppler's block in rope bosom, the non-GEO star of Beidou satellite navigation system then searches for three pieces, other satellite navigation system
Satellite acquisition five pieces；After all satellite acquisitions are gone over, the star not captured changes searching for five pieces again into, had the most both improve and has caught
Obtain speed, ensure again not leakage.
The processing method of described signal intensity estimation function is: when trapping module returns successfully, if result is beyond capture
The half of thresholding, the most next time capture command；According to the Doppler results returned, search for adjacent one piece Doppler's block；Deng
Capture result when again returning to, compares two times result, and the biggest for final result, do so can be prevented effectively from, high
Error capture under signal；When trapping module returns successfully, if result is without departing from the half of detection threshold, does not the most search again for this and defend
Star, thus reach the purpose of fast Acquisition.
Claims (4)
1. a GNSS receiver self adaptation catching method, is characterized in that: arrange choosing in the capture engine software system of system
Star function, capture parameter arrange function and signal intensity estimation function；Select star function to select satellite feeding capture parameter and letter is set
Number, capture parameter arranges function and design parameter is sent into the trapping module of system, sheriff's module returns result to signal intensity
Estimation function, signal intensity estimation function judges to continue capture, or star function is selected in return.
GNSS receiver self adaptation catching method the most according to claim 1, is characterized in that:
Described select star function processing method be: blind catch the first round and only capture five GEO satellite of Beidou satellite navigation system, and
Use short integration Fast tracking/pull-in/fast pull-in mode；If acquisition success, illustrate to receive satellite all right, then start to distribute Beidou satellite navigation system
Non-GEO satellite and the satellite of other satellite navigation system, the pattern of capture is constant, completes blind catching；If capturing unsuccessfully, then start
Long integration high sensitivity acquisition mode, the most first captures five GEO satellite of Beidou satellite navigation system, and reallocation big-dipper satellite is led
The non-GEO satellite of boat system and other satellite navigation system satellite, ensure that original acquisition sensitivity.
GNSS receiver self adaptation catching method the most according to claim 1, is characterized in that:
The processing method that described capture parameter arranges function is: the Doppler's block divided for different satellite navigation systems, right
The GEO star of Beidou satellite navigation system only searches for one piece of Doppler's block in bosom, and the non-GEO star of Beidou satellite navigation system is then
Search for three pieces, the satellite acquisition of other satellite navigation system five pieces；After all satellite acquisitions are gone over, the star not captured is again
Change into searching for five pieces.
GNSS receiver self adaptation catching method the most according to claim 1, is characterized in that:
The processing method of described signal intensity estimation function is: when trapping module returns successfully, if result is beyond detection threshold
Half, capture command the most next time；According to the Doppler results returned, search for adjacent one piece Doppler's block；Deng capture
When result again returns to, compare two times result, the biggest for final result；When trapping module returns successfully, if knot
Fruit, without departing from the half of detection threshold, does not the most search again for this satellite.
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| CN201610723494.5A CN106125104A (en) | 2016-08-25 | 2016-08-25 | GNSS receiver self adaptation catching method |
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| CN201610723494.5A CN106125104A (en) | 2016-08-25 | 2016-08-25 | GNSS receiver self adaptation catching method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109743100A (en) * | 2019-01-15 | 2019-05-10 | 北京理工大学 | The multi-user channel distribution method of capturing information based on Big Dipper short message system |
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| CN101109793A (en) * | 2007-08-01 | 2008-01-23 | 上海华龙信息技术开发中心 | Method for fast capturing satellite and implementing equipment thereof |
| US20100141520A1 (en) * | 2007-08-21 | 2010-06-10 | Giorgio Ghinamo | Method for the acquisition of signals of a global navigation satellite system |
| CN102243312A (en) * | 2011-04-29 | 2011-11-16 | 西安航天寰星电子科技有限公司 | Method for blindly capturing visible satellite with availability for avoiding cold starting |
| CN103197328A (en) * | 2013-03-14 | 2013-07-10 | 中国人民解放军国防科学技术大学 | High dynamic satellite receiver fast capture method based on 2 ms data storage |
| CN104865587A (en) * | 2015-06-15 | 2015-08-26 | 中国人民解放军国防科学技术大学 | Quick locating method based on GEO constellation coarse location for Beidou receiver |
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| CN109743100A (en) * | 2019-01-15 | 2019-05-10 | 北京理工大学 | The multi-user channel distribution method of capturing information based on Big Dipper short message system |
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