CN106814374A - A kind of reception device and method of GPS L5 signals - Google Patents
A kind of reception device and method of GPS L5 signals Download PDFInfo
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- CN106814374A CN106814374A CN201611206037.5A CN201611206037A CN106814374A CN 106814374 A CN106814374 A CN 106814374A CN 201611206037 A CN201611206037 A CN 201611206037A CN 106814374 A CN106814374 A CN 106814374A
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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
-
- 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
- G01S19/30—Acquisition or tracking or demodulation of signals transmitted by the system code related
Abstract
The invention discloses a kind of reception device and method of GPS L5 signals, reception device includes：Antenna：For the satellite-signal of reception space radiation；L1CA radio-frequency channels：For by the L1CA signals of satellite-signal from rf conversion to intermediate frequency；L5 radio-frequency channels：For by the L5 signals of satellite-signal from rf conversion to intermediate frequency；L1CA trapping modules：For being captured to intermediate frequency L1CA signals, Doppler and code phase are obtained；Tracking module：It is tracked for the intermediate frequency L1CA signals to capture, bit synchronization, frame synchronization and text are decoded；Pilot channel tracking is carried out to intermediate frequency L5 signals, pseudorange, navigation message and the L5 signal pseudoranges of L1CA signals is exported；Positioning calculation module：The pseudorange of the L1CA signals for being exported using tracking module, navigation message and L5 signals pseudorange carry out double frequency positioning calculation, obtain receiver location.Present invention reduces the implementation complexity and memory space of trapping module, the implementation complexity of tracking phase is significantly reduced.
Description
Technical field
The present invention relates to high accuracy satellite navigation receiver, the particularly a kind of reception device and method of GPS L5 signals.
Background technology
At present, in satellite navigation receiver, generally need to receive two signals of L1CA and L2C of GPS.L1CA and L2C
The spread spectrum frequency of signal is 1.023MHz, and the pseudo-range positioning accuracy of single-point single-frequency is within 300 meters., GPS of America official in 2013
The Fang Fabu interface standards of L5 signals, the spread spectrum frequency of L5 signals is 10.23MHz, corresponding single-point single-frequency pseudorange positioning
Precision is in 30 meters, ten times to be higher by than L1CA and L2C signal pseudo-range positioning accuracies.Therefore, it is high-precision point using L5 signals
The important means and mode of positioning.
Current GPS multiple-frequency signal receivers use Direct Acquisition L5 signals, and the side of pilot channel is then tracked simultaneously
Method.This method is needed to produce at least 10230 related channel programs in acquisition phase, and all code phases are contrasted using the mode of traversal
Under coherent integration value, and then adjudicate currently whether there is L5 signals.The method than the catching method of L1 signal complexity and
The memory space of occupancy wants high more than 10 times.
The content of the invention
The technical problems to be solved by the invention are, in view of the shortcomings of the prior art, providing a kind of reception of GPS L5 signals
Device and method.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of reception device of GPS L5 signals,
Including：
Antenna：For the satellite-signal of reception space radiation；
L1CA radio-frequency channels：For by the L1CA signals of satellite-signal from rf conversion to intermediate frequency；
L5 radio-frequency channels：For by the L5 signals of satellite-signal from rf conversion to intermediate frequency；
L1CA trapping modules：For being captured to intermediate frequency L1CA signals, Doppler and code phase are obtained；
Tracking module：It is tracked for the intermediate frequency L1CA signals to capture, bit synchronization, frame synchronization and text are decoded；
Pilot channel tracking is carried out to intermediate frequency L5 signals, pseudorange, navigation message and the L5 signal pseudoranges of L1CA signals is exported；
Positioning calculation module：Pseudorange, navigation message and L5 signals for the L1CA signals using tracking module output
Pseudorange carries out double frequency positioning calculation, obtains receiver location.
Present invention also offers a kind of method of reseptance of GPS L5 signals, comprise the following steps：
1) radiofrequency signal of L1CA and L5 is down-converted to by intermediate-freuqncy signal by radio-frequency channel respectively；
2) L1CA signals are captured using trapping module, obtains code phase and the Doppler of L1CA signals；
3) bit synchronization and frame synchronization are carried out to L1CA signals, finds L1CA signal data frame header positions；
4) the local pseudo-code of L5 signals is generated, the tracking of L5 signal enablings is waited；
5) arrived the moment in L1CA signals frame head, start L5 signalling channels, synchronize data receiver；
6) after L1CA signals are traced in locking, the tracking of L5 signals is started, after the initial code phase positions of L5 are for tracking
The code phase of L1CA signals be multiplied by 10 subtract a fixed value (this fixed value by L1CA signals and L5 signals transmission delay with it is hard
What part circuit delay was determined, the accurate location of fixed value is found by the method for extensive search contrast before device startup), L5
Doppler using L1CA signal captures Doppler；
7) text decoding is carried out to L1CA signals, L1CA signals pseudorange and navigation message is exported；At the same time, when L5 signals
After locked tracking, local pseudo-code state after locking is judged, exported using this state as the pseudorange of L5 signals.
Step 5) in, the tracking of L5 signals is directly initiated at the L1CA signals frame head arrival moment.
Compared with prior art, the advantageous effect of present invention is that：The present invention only captures GPS L1CA signals, then
Directly guide L5 signals to enter tracking using the capture result of L1CA signals, the capture of L5CA signals is eliminated, so as to reduce
The implementation complexity and memory space of trapping module.In the tracking phase of L5, only tracking pilot channel, removes text treatment ring
Section, so as to the implementation complexity of tracking phase is greatly reduced.
Brief description of the drawings
Fig. 1 is apparatus of the present invention structure chart；
Fig. 2 is the fundamental diagram of apparatus of the present invention；
Fig. 3 is the generating principle figure of L5 signals；
Fig. 4 is local pseudo-code generating principle figure.
Specific embodiment
Apparatus structure of the invention is as shown in Figure 1.
Whole device includes：Antenna, L1CA radio-frequency channels, L5 radio-frequency channels, L1CA trapping modules, tracking module and fixed
Position resolves module.Antenna is connected with L1CA radio-frequency channels and L5 radio-frequency channels, and L1CA radio-frequency channels connect with L1CA trapping modules
Connect, L1CA trapping modules and L5 radio-frequency channels are connected with tracking module, and tracking module is connected with positioning calculation module.
The operation principle of apparatus of the present invention is as shown in Figure 2：
The signal that antenna is received gives L1CA and L5 radio-frequency channels simultaneously.L1CA radio-frequency channels will become under L1CA radiofrequency signals
Frequency is L1CA intermediate-freuqncy signals, and L5 radiofrequency signals are down-converted to L5 intermediate-freuqncy signals by L5 radio-frequency channels.It is right in L1CA trapping modules
L1CA signals are captured, and obtain Doppler and the code phase of L1CA.In tracking module, L1CA signals are tracked, position
Synchronous, frame synchronization and text decoding, export L1CA pseudoranges and navigation message.According to the L1CA Doppler that capture is obtained, and
And start the pilot channel tracking for guiding L5 signals to carry out Q branch roads at the L1CA data frame head arrival moment, directly export the Q branch of L5
The pseudorange of road signal, because the Q tributary signals of L5 have modulation NH bit synchronization codes, it is therefore desirable to which the Q tributary signals to L5 enter line position
Simultaneously operating.After on the Q tributary signals of L5 are tracked, XOR is done with by the local code of code phase offset by NH yards, then
Carry out coherent integration to reach more high-precision signal trace with data are received.Positioning calculation module is exported using tracking module
L1CA pseudoranges, L5 pseudoranges and L1CA navigation messages carry out double frequency positioning calculation.
The action of each module is：
Antenna：The satellite-signal of reception space radiation；
L1CA radio-frequency channels：By L1CA signals from rf conversion to intermediate frequency；
L5 radio-frequency channels：By L5 signals from rf conversion to intermediate frequency；
L1CA trapping modules：L1CA signals are captured, Doppler and code phase is obtained；
Tracking module：L1CA signals are tracked, bit synchronization, frame synchronization and text are decoded；L5 signals are led
Frequency channels track.Export pseudorange, navigation message and the L5 signal pseudoranges of L1CA signals；Positioning calculation module：Using tracking mould
The pseudorange of L1CA signals of block output, navigation message and L5 signals pseudorange carry out double frequency positioning calculation, obtain receiver location.
The implementation steps of the method for reseptance of L5 pilot signals are：
Step 1：The radiofrequency signal of L1CA and L5 is down-converted to by intermediate-freuqncy signal by radio-frequency channel respectively；
Step 2：L1CA signals are captured using trapping module, obtains code phase and the Doppler of L1CA；
Step 3：Bit synchronization and frame synchronization are carried out to L1CA signals, L1CA signal data frame header positions are found；
Step 4：The local pseudo-code of L5 signals is generated, the tracking of L5 signal enablings is waited；
Step 4：Arrived the moment in L1CA signals frame head, start L5 signalling channels, synchronize data receiver.
Step 5：After in the tracked locking of L1CA signals, start the tracking of L5 signals, the initial code phase positions of L5 be with
The code phase of L1CA signals is multiplied by 10 and subtracts a fixed value after track, and the Doppler of L5 utilizes the Doppler of L1CA signal captures；
Step 6：Text decoding is carried out to L1CA signals, L1CA pseudoranges and navigation message is exported；
Step 7：Output L5 pseudoranges.
The principle of L5 pilot signal receptions method proposed by the present invention is：
1st, L5 is booted up the selection at moment：
L5 PN-code captures are 1.5 seconds, and its period start time aligns with the frame head of L1CA signal texts, therefore can be
The L1CA signals frame head arrival moment directly initiates the tracking of L5 signals.Now L5 code phases are 0, and Doppler can directly utilize L1CA
The Doppler that signal capture is obtained.
2nd, the generation of the local pseudo-code of L5 signals：
L5 signals be pilot tone and data channel data modulated by QPSK in I branch roads and Q path quadratures be multiplexed and obtain,
The data of pilot channel and data channel are also mutually orthogonal.Therefore in order to only track pilot channel, it is necessary to produce local pseudo-code
When produce pilot channel pseudo-code.The generating principle of L5 signals is as shown in Figure 3.Wherein, the electricity that data channel will send
Literary data first do CRC check, and error control coding then carries out xor operation and realize bit synchronization, finally with pseudo- code-phase with NH yards
Close computing.And pilot channel does not have transmitting text data, pseudo-code directly carries out xor operation bit synchronization with NH yards.Finally, data
The QPSK that the data of passage and pilot channel are multiplexed by I branch roads and Q path quadratures respectively is modulated.Local pseudo-code in the present invention
It is without the pilot channel pseudo-code processed with NH yards of XOR, as shown in Figure 4.By the L5 pseudo-codes and reception signal of above-mentioned treatment
Data channel is eliminated by carrying out related accumulating operation, only retains pilot channel.Because L1CA signals have contained gps satellite
Navigation message, the navigation message content on this text and L5 signals is completely the same, and positioning calculation module can utilize L1CA
Navigation message carry out double frequency positioning calculation.Therefore the pilot channel of L5 is only tracked, text treatment is not carried out does not influence receiver
Normal work.
3rd, the tracking treatment of L5 signals：
Arrived the moment in L1CA signals frame head, start L5 signalling channels, synchronize data receiver.Due to the puppet of L5 signals
Chip width is that 1/10th, L1CA signals, one error of code phase offset of L1CA signals puppet chip width can cause L5 to believe
Number 10 offset errors of code phase, and signal trace module at most uses N (N<10) sampled signal of individual chip width is carried out
Tracking is processed.If the tracking that L5 signals are carried out if after L1CA signal captures is processed, being easily caused L5 signals cannot be accurate
The problem of tracking.Therefore, before L1CA signals are not also traced locking, L5 signals are not tracked temporarily.In L1CA
After the tracked locking of signal is upper, start the tracking of L5 signals, the Doppler of L5 using L1CA signal captures Doppler divided by
One fixation is worth to；The initial code phase positions of L5 subtract a fixation for the code phase of the L1CA signals after tracking lock is multiplied by 10
Value.
Claims (4)
1. a kind of reception device of GPS L5 signals, it is characterised in that including：
Antenna：For the satellite-signal of reception space radiation；
L1CA radio-frequency channels：For by the L1CA signals of satellite-signal from rf conversion to intermediate frequency；
L5 radio-frequency channels：For by the L5 signals of satellite-signal from rf conversion to intermediate frequency；
L1CA trapping modules：For being captured to intermediate frequency L1CA signals, Doppler and code phase are obtained；
Tracking module：It is tracked for the intermediate frequency L1CA signals to capture, bit synchronization, frame synchronization and text are decoded；Centering
Frequency L5 signals carry out pilot channel tracking, export pseudorange, navigation message and the L5 signal pseudoranges of L1CA signals；
Positioning calculation module：Pseudorange, navigation message and L5 signal pseudoranges for the L1CA signals using tracking module output
Double frequency positioning calculation is carried out, receiver location is obtained.
2. a kind of method of reseptance of GPS L5 signals, it is characterised in that comprise the following steps：
1) radiofrequency signal of L1CA and L5 is down-converted to by intermediate-freuqncy signal by radio-frequency channel respectively；
2) L1CA signals are captured using trapping module, obtains code phase and the Doppler of L1CA signals；
3) bit synchronization and frame synchronization are carried out to L1CA signals, finds L1CA signal data frame header positions；
4) the local pseudo-code of L5 signals is generated, the tracking of L5 signal enablings is waited；
5) arrived the moment in L1CA signals frame head, start L5 signalling channels, synchronize data receiver；
6) after L1CA signals are traced in locking, the tracking of L5 signals is started, the initial code phase positions of L5 are L1CA after tracking
The code phase of signal is multiplied by K and subtracts a fixed value, and the Doppler of L5 utilizes the Doppler of L1CA signal captures；
7) text decoding is carried out to L1CA signals, L1CA signals pseudorange and navigation message is exported；At the same time, when L5 signals are locked
After fixed tracking, local pseudo-code state after locking is judged, exported using this state as the pseudorange of L5 signals.
3. the method for reseptance of GPS L5 signals according to claim 2, it is characterised in that step 5) in, in L1CA signals
The frame head arrival moment directly initiates the tracking of L5 signals.
4. the method for reseptance of GPS L5 signals according to claim 2, it is characterised in that K=10.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267755A (en) * | 2017-12-19 | 2018-07-10 | 北京遥测技术研究所 | A kind of tracking processing method of navigation signal |
| CN109528458A (en) * | 2018-10-23 | 2019-03-29 | 广州古拉思信息科技有限公司 | A kind of visually impaired people goes on a journey auxiliary system and its control method |
| CN110007325A (en) * | 2019-04-15 | 2019-07-12 | 中国电子科技集团公司第二十研究所 | A kind of rapid frame synchronization method for star base enhancing L5 signal |
| CN110045397A (en) * | 2019-04-03 | 2019-07-23 | 西安开阳微电子有限公司 | A kind of L5 signal acquisition methods and device based on FPGA |
| CN110716216A (en) * | 2019-08-30 | 2020-01-21 | 和芯星通科技(北京)有限公司 | B1C signal tracking method and device |
| CN111025348A (en) * | 2018-10-09 | 2020-04-17 | 泰斗微电子科技有限公司 | Method for receiving B1C QMBOC signal, chip and module |
| CN116232423A (en) * | 2022-12-29 | 2023-06-06 | 西安空间无线电技术研究所 | Time division duplex inter-satellite link communication method based on master-slave synchronization |
| US11686855B2 (en) | 2019-10-15 | 2023-06-27 | Onenav, Inc. | Modernized global navigation satellite system (GNSS) receivers and commercially viable consumer grade GNSS receivers |
| CN117192580A (en) * | 2023-11-07 | 2023-12-08 | 天津云遥宇航科技有限公司 | Satellite-borne Galileo dual-frequency atmosphere occultation signal capturing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003044556A2 (en) * | 2001-11-20 | 2003-05-30 | Integrinautics Corporation | Multiple antenna multi-frequency measurement system |
| CN101464507A (en) * | 2009-01-12 | 2009-06-24 | 中国科学院微电子研究所 | Baseband signal processing method and system for Galilei system |
| CN102116866A (en) * | 2009-12-31 | 2011-07-06 | 和芯星通科技(北京)有限公司 | Method and device for tracking global positioning system precision (GPS P) and/or Y code signal of full-cycle carrier |
| CN103675850A (en) * | 2013-12-19 | 2014-03-26 | 南京航空航天大学 | Double-frequency GPS signal capturing method based on segmented and split-radix Fourier transform |
| CN105717520A (en) * | 2016-03-22 | 2016-06-29 | 湖南北云科技有限公司 | GPS L2C pilot signal receiving device and method |
-
2016
- 2016-12-23 CN CN201611206037.5A patent/CN106814374A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003044556A2 (en) * | 2001-11-20 | 2003-05-30 | Integrinautics Corporation | Multiple antenna multi-frequency measurement system |
| CN101464507A (en) * | 2009-01-12 | 2009-06-24 | 中国科学院微电子研究所 | Baseband signal processing method and system for Galilei system |
| CN102116866A (en) * | 2009-12-31 | 2011-07-06 | 和芯星通科技(北京)有限公司 | Method and device for tracking global positioning system precision (GPS P) and/or Y code signal of full-cycle carrier |
| CN103675850A (en) * | 2013-12-19 | 2014-03-26 | 南京航空航天大学 | Double-frequency GPS signal capturing method based on segmented and split-radix Fourier transform |
| CN105717520A (en) * | 2016-03-22 | 2016-06-29 | 湖南北云科技有限公司 | GPS L2C pilot signal receiving device and method |
Non-Patent Citations (1)
| Title |
|---|
| 王忠 等: "一种GPS L1C/A与L2C双频信号的捕获算法", 《通信技术》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267755A (en) * | 2017-12-19 | 2018-07-10 | 北京遥测技术研究所 | A kind of tracking processing method of navigation signal |
| CN108267755B (en) * | 2017-12-19 | 2020-04-10 | 北京遥测技术研究所 | Tracking processing method of navigation signal |
| CN111025348A (en) * | 2018-10-09 | 2020-04-17 | 泰斗微电子科技有限公司 | Method for receiving B1C QMBOC signal, chip and module |
| CN109528458A (en) * | 2018-10-23 | 2019-03-29 | 广州古拉思信息科技有限公司 | A kind of visually impaired people goes on a journey auxiliary system and its control method |
| CN110045397A (en) * | 2019-04-03 | 2019-07-23 | 西安开阳微电子有限公司 | A kind of L5 signal acquisition methods and device based on FPGA |
| CN110007325A (en) * | 2019-04-15 | 2019-07-12 | 中国电子科技集团公司第二十研究所 | A kind of rapid frame synchronization method for star base enhancing L5 signal |
| CN110716216A (en) * | 2019-08-30 | 2020-01-21 | 和芯星通科技(北京)有限公司 | B1C signal tracking method and device |
| CN110716216B (en) * | 2019-08-30 | 2022-02-25 | 和芯星通科技(北京)有限公司 | B1C signal tracking method and device |
| US11686855B2 (en) | 2019-10-15 | 2023-06-27 | Onenav, Inc. | Modernized global navigation satellite system (GNSS) receivers and commercially viable consumer grade GNSS receivers |
| CN116232423A (en) * | 2022-12-29 | 2023-06-06 | 西安空间无线电技术研究所 | Time division duplex inter-satellite link communication method based on master-slave synchronization |
| CN117192580A (en) * | 2023-11-07 | 2023-12-08 | 天津云遥宇航科技有限公司 | Satellite-borne Galileo dual-frequency atmosphere occultation signal capturing method |
| CN117192580B (en) * | 2023-11-07 | 2024-01-26 | 天津云遥宇航科技有限公司 | Satellite-borne Galileo dual-frequency atmosphere occultation signal capturing method |
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Application publication date: 20170609 |