CN105388487A - Method for realizing positioning based on Beidou short message transmission differential signal - Google Patents
Method for realizing positioning based on Beidou short message transmission differential signal Download PDFInfo
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- CN105388487A CN105388487A CN201510794180.XA CN201510794180A CN105388487A CN 105388487 A CN105388487 A CN 105388487A CN 201510794180 A CN201510794180 A CN 201510794180A CN 105388487 A CN105388487 A CN 105388487A
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- differential
- station terminal
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- short message
- differential data
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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
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S19/07—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
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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
- G01S19/40—Correcting position, velocity or attitude
- G01S19/41—Differential correction, e.g. DGPS [differential GPS]
Abstract
The invention relates to a method for realizing positioning based on a Beidou short message transmission differential signal. The method is provided in order to improve the applicability of satellite differential positioning, and is used to perform differential positioning in an area with neither network base station nor mobile communication base station. The method comprises the following steps: a reference station terminal gets a differential correction number according to a received satellite signal and the coordinate of a reference station, and stores the differential correction number in an internal memory of the reference station terminal; a moving station terminal generates a differential data request including differential start time and differential frequency, and sends the differential data request to the reference station terminal; the reference station terminal sends corresponding differential data to a reference station coding module after receiving the differential data request sent by the moving station terminal; the reference station terminal sends a single piece of differential data information through a Beidou short message, and multiple cards send differential data information in turn to meet the requirement of the moving station terminal for positioning frequency; and the moving station terminal receives differential data of multiple epochs, uses the data to fit a pseudo-range differential correction number through Chebyshev polynomial interpolation, and uses a correction number obtained by extrapolation to perform differential positioning.
Description
[technical field]
The invention belongs to satellite signal transit technical field, specifically refer to a kind of method utilizing Big Dipper short message differential signal transmission to realize location.
[background technology]
The short message communication function of big-dipper satellite is the specific function that GPS of America and Russian GLONASS do not possess, and is the first satellite navigation system possessing message communication and be integrated outside location, time service in the whole world.
The communication of big-dipper satellite short message has subscriber computer and subscriber computer, bi-directional digital message communication function between subscriber computer and ground control centre.General subscriber computer once can transmit 36 Chinese characters, and what application was checked and approved can reach transmission 120 Chinese characters or 240 codes.Short message not only can point-to-point two-way communication, and its commander's terminal provided can carry out the broadcasting transmitting of point to multi--point, for various platform application provides great convenience.
Differential data transmission is propagated by modes such as internet, radio station, GPRS/3G, has larger dependence to basic communication facility.Cannot work in remote districts, in landform such as mountain areas, radio station uses and is also very limited.Due to the capacity limit of Big Dipper short message, some current general differential signal standards (RTCM etc.) cannot be used.
[summary of the invention]
Technical matters to be solved by this invention is to provide a kind of method utilizing Big Dipper short message differential signal transmission to realize location, improves the applicability of satellite difference location, carries out Differential positioning in the area without network base station, mobile communication base station.
The present invention is achieved in that
Utilize Big Dipper short message differential signal transmission to realize a method for location, comprise the steps:
Step one: base station terminal obtains differential corrections according to the satellite-signal received and base station coordinate, is stored in base station terminal inner storer; Described differential corrections comprises differential position, pseudo range difference data, is binary data;
Step 2: rover station terminal generates differential data request, and its content comprises difference start time, differential frequency, and is sent to rover station terminal;
Step 3: after base station terminal receives the differential data request of rover station terminal transmission, the differential-type needed for rover station, constellation types, data precision send corresponding differential data to base station coding module;
Step 4: base station terminal sends wall scroll differential data information by a Big Dipper short message, and many cards send to meet the location frequency needed for rover station terminal in turn;
Step 5: after rover station terminal receives difference information, the transmitting time of the differential data next time received is calculated according to the difference start time in differential data request and differential frequency, if there is disappearance, then send data retransmission requests, wherein comprise the time of the differential data of time and the needs repeating transmission sent request, send receipt inquiry request to central station after being sent T second, if the receipt not having this data receiver complete, again send till acquisition receipt;
Step 6: recycle these data acquisition Chebyshev polynomials interpolation matching pseudo range difference corrections after receiving the differential data of multiple epoch, re-uses the correction obtained of extrapolating and carries out Differential positioning.
Further, T=5 in described step 5.
The invention has the advantages that: 1, adopt Big Dipper short message differential signal transmission, broken away from the dependence to communication infrastructure, be especially applicable to remote complicated landform area.2, adopt self-defining data layout and multi-card system transmission differential data, improve practical application efficiency.3, adopt automatic request for repetition (ARQ) technology, solve the problem of Big Dipper short message packet loss.4, utilize differential corrections interpolation fitting technique, decrease transmission data, be more suitable for utilizing Big Dipper short message to transmit differential data.
[accompanying drawing explanation]
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is present system Organization Chart.
Fig. 2 is differential data Organization Chart in position in the present invention.
Fig. 3 is pseudo range difference data shelf composition in the present invention.
Fig. 4 is re-send request may data shelf composition in the present invention.
[embodiment]
The present invention is a kind of satellite navigation differential technique based on Big Dipper short message and self-defining brand-new transformat.Mainly comprise positioning of the reference station terminal, Big Dipper short message communication module, rover station locating terminal.System architecture diagram as shown in Figure 1.Fig. 2 is differential data Organization Chart in position in the present invention.Fig. 3 is pseudo range difference data shelf composition in the present invention.Fig. 4 is re-send request may data shelf composition in the present invention.
Idiographic flow is as follows:
Step one: base station terminal obtains differential corrections according to the satellite-signal received and base station coordinate, is stored in base station terminal inner storer; Described differential corrections comprises differential position, pseudo range difference data, is binary data;
Step 2: rover station terminal generates differential data request, and its content comprises difference start time, differential frequency, and is sent to rover station terminal;
Step 3: after base station terminal receives the differential data request of rover station terminal transmission, the differential-type needed for rover station, constellation types, data precision send corresponding differential data to base station coding module;
Step 4: base station terminal sends wall scroll differential data information by a Big Dipper short message, and many cards send to meet the location frequency needed for rover station terminal in turn;
Step 5: after rover station terminal receives difference information, the transmitting time of the differential data next time received is calculated according to the difference start time in differential data request and differential frequency, if there is disappearance, then send data retransmission requests, wherein comprise the time of the differential data of time and the needs repeating transmission sent request, send receipt inquiry request to central station after being sent T second, if the receipt not having this data receiver complete, again send till acquisition receipt;
Step 6: recycle these data acquisition Chebyshev polynomials interpolation matching pseudo range difference corrections after receiving the differential data of multiple epoch, re-uses the correction obtained of extrapolating and carries out Differential positioning.
Multi-card system, have within 1 minute, could send 1 because the civilian Big Dipper is stuck in short message transmission, the transmission restriction of every bar 60 Chinese characters (120 byte), short message receives not restriction.Be the demand that frequency or capacity all cannot meet Differential positioning, therefore need to adopt multi-card system to use multiple Big Dipper cards to send difference information in turn.
Automatic request for repetition (ARQ): automatic request for repetition, also claim " circulation is asked automatically ", ARQ (AutomaticRepeatreQuest) agreement refer to receiving station receive one comprise information (frame) of error data time, automatically send the request of a retransmission error frame.The effect principle of ARQ automatically retransmits the Frame of makeing mistakes, and it has three kinds of forms: have waiting type ARQ, GBN go-back-N ARQ and selective repeat ARQ.If because in Big Dipper short message transmitting procedure, the verification of certain bag is not passed through, directly discarded whole bag, therefore needs to adopt ARQ technology to ensure the reception of differential data.
Differential data is extrapolated: because the transmission of Big Dipper short message limits, and namely uses multi-card system also cannot reach the differential frequency of 1Hz or higher; And due to the time delay of satellite transmission and decoding, the satellite model that rover station terminal receives is asynchronous with differential signal.Therefore need to carry out interpolation and extrapolation to differential data.
The invention has the advantages that: 1, adopt Big Dipper short message differential signal transmission, broken away from the dependence to communication infrastructure, be especially applicable to remote complicated landform area.2, adopt self-defining data layout and multi-card system transmission differential data, improve practical application efficiency.3, adopt automatic request for repetition (ARQ) technology, solve the problem of Big Dipper short message packet loss.4, utilize differential corrections interpolation fitting technique, decrease transmission data, be more suitable for utilizing Big Dipper short message to transmit differential data.
The foregoing is only better enforcement use-case of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. utilize Big Dipper short message differential signal transmission to realize a method for location, it is characterized in that: comprise the steps:
Step one: base station terminal obtains differential corrections according to the satellite-signal received and base station coordinate, is stored in base station terminal inner storer; Described differential corrections comprises differential position, pseudo range difference data, is binary data;
Step 2: rover station terminal generates differential data request, and its content comprises difference start time, differential frequency, and is sent to rover station terminal;
Step 3: after base station terminal receives the differential data request of rover station terminal transmission, the differential-type needed for rover station, constellation types, data precision send corresponding differential data to base station coding module;
Step 4: base station terminal sends wall scroll differential data information by a Big Dipper short message, and many cards send to meet the location frequency needed for rover station terminal in turn;
Step 5: after rover station terminal receives difference information, the transmitting time of the differential data next time received is calculated according to the difference start time in differential data request and differential frequency, if there is disappearance, then send data retransmission requests, wherein comprise the time of the differential data of time and the needs repeating transmission sent request, send receipt inquiry request to central station after being sent T second, if the receipt not having this data receiver complete, again send till acquisition receipt;
Step 6: recycle these data acquisition Chebyshev polynomials interpolation matching pseudo range difference corrections after receiving the differential data of multiple epoch, re-uses the correction obtained of extrapolating and carries out Differential positioning.
2. a kind of Big Dipper short message differential signal transmission that utilizes realizes the method for locating as claimed in claim 1, it is characterized in that: the T=5 in described step 5.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108287355A (en) * | 2017-01-10 | 2018-07-17 | 厦门雅迅网络股份有限公司 | A kind of method that mobile terminal GNSS differential datas receive control |
| CN109889581A (en) * | 2019-01-29 | 2019-06-14 | 北京讯腾智慧科技股份有限公司 | A kind of gas intelligent monitoring system based on Big Dipper short message |
| CN112702689A (en) * | 2020-12-08 | 2021-04-23 | 青岛网信信息科技有限公司 | Method for correcting Beidou satellite positioning parameters based on short message uploading function |
| CN112711048A (en) * | 2020-12-15 | 2021-04-27 | 中山大学 | SSR transmission method and high-precision positioning system based on Beidou third RDSS short message |
| WO2021077587A1 (en) * | 2019-10-23 | 2021-04-29 | 泰斗微电子科技有限公司 | Differential data processing method, and receiver testing method |
| CN112929833A (en) * | 2019-12-06 | 2021-06-08 | 中移(上海)信息通信科技有限公司 | Data distribution system and method |
| CN113132920A (en) * | 2020-01-15 | 2021-07-16 | 中移(上海)信息通信科技有限公司 | Data distribution method, device and system |
| CN113391334A (en) * | 2021-07-14 | 2021-09-14 | 武汉大学 | Space signal ranging error correction coding method based on Beidou global short message |
| CN113676834A (en) * | 2021-08-25 | 2021-11-19 | 广东几米星联通讯有限公司 | Processing method, positioning device and communication method of Beidou communication positioning information |
| CN114302332A (en) * | 2021-12-27 | 2022-04-08 | 中国北方工业有限公司 | Positioning system and method based on narrow-band data broadcasting of Beidou third and all-terrain satellites |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287355A (en) * | 2017-01-10 | 2018-07-17 | 厦门雅迅网络股份有限公司 | A kind of method that mobile terminal GNSS differential datas receive control |
| CN109889581A (en) * | 2019-01-29 | 2019-06-14 | 北京讯腾智慧科技股份有限公司 | A kind of gas intelligent monitoring system based on Big Dipper short message |
| WO2021077587A1 (en) * | 2019-10-23 | 2021-04-29 | 泰斗微电子科技有限公司 | Differential data processing method, and receiver testing method |
| CN112929833B (en) * | 2019-12-06 | 2022-05-06 | 中移(上海)信息通信科技有限公司 | Data distribution system and method |
| CN112929833A (en) * | 2019-12-06 | 2021-06-08 | 中移(上海)信息通信科技有限公司 | Data distribution system and method |
| CN113132920A (en) * | 2020-01-15 | 2021-07-16 | 中移(上海)信息通信科技有限公司 | Data distribution method, device and system |
| CN113132920B (en) * | 2020-01-15 | 2022-08-09 | 中移(上海)信息通信科技有限公司 | Data distribution method, device and system |
| CN112702689A (en) * | 2020-12-08 | 2021-04-23 | 青岛网信信息科技有限公司 | Method for correcting Beidou satellite positioning parameters based on short message uploading function |
| CN112711048A (en) * | 2020-12-15 | 2021-04-27 | 中山大学 | SSR transmission method and high-precision positioning system based on Beidou third RDSS short message |
| CN112711048B (en) * | 2020-12-15 | 2023-07-04 | 中山大学 | SSR transmission method and high-precision positioning system based on Beidou No. three RDSS short message |
| CN113391334A (en) * | 2021-07-14 | 2021-09-14 | 武汉大学 | Space signal ranging error correction coding method based on Beidou global short message |
| CN113391334B (en) * | 2021-07-14 | 2022-10-14 | 武汉大学 | Space signal ranging error correction coding method based on Beidou global short message |
| CN113676834A (en) * | 2021-08-25 | 2021-11-19 | 广东几米星联通讯有限公司 | Processing method, positioning device and communication method of Beidou communication positioning information |
| CN114302332A (en) * | 2021-12-27 | 2022-04-08 | 中国北方工业有限公司 | Positioning system and method based on narrow-band data broadcasting of Beidou third and all-terrain satellites |
| CN114302332B (en) * | 2021-12-27 | 2023-08-08 | 中国北方工业有限公司 | Positioning system and method based on Beidou No. three and space-time satellite narrowband data broadcasting |
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