CN1862284A - System for processing navigational satellite signal - Google Patents
System for processing navigational satellite signal Download PDFInfo
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- CN1862284A CN1862284A CNA2006100120615A CN200610012061A CN1862284A CN 1862284 A CN1862284 A CN 1862284A CN A2006100120615 A CNA2006100120615 A CN A2006100120615A CN 200610012061 A CN200610012061 A CN 200610012061A CN 1862284 A CN1862284 A CN 1862284A
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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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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present invention provides a navigation satellite signal processing system. It includes a signal acquisition device, and is characterized by that the described signal acquisition device has computer interface whose data transmission rate is greater than 12Mbit/s. The adoption of said system can implement real-time, continuous and long-period acquisition of navigation satellite signal, and can directly transfer the signal data into computer.
Description
Technical field
The invention belongs to the satellite navigation field, particularly a kind of system for processing navigational satellite signal, this disposal system generally comprises signal pickup assembly and signal playback device, is a kind of effective tool of researching and developing satellite navigation receiver.Native system becomes the lower intermediate-freuqncy signal of carrier frequency with the Navsat radiofrequency signal through down coversion, becomes data through over-sampling again, and then by standard USB2.0 interface data is sent to computing machine.Native system can be gathered navigation satellite signal in real time, continuously, for a long time, and the developer can utilize algorithm, structure and program or the exploitation Satellite Navigation Software receiver of these data research satellite navigation receivers.Simultaneously, native system also can be by the data of standard USB2.0 interface receiving computer, and the radiofrequency signal that becomes Navsat again sends, with checking, debugging satellite navigation receiver.System for processing navigational satellite signal among the present invention can be applied to the collection and the playback of any navigation satellite signal, comprise the GPS of USA system, Muscovite GLONASS system, the Galileo system in Europe, the dipper system of China, and any new satellite navigation system that may occur later on.
Background technology
Satellite navigation system is a kind of by many navigation satellite signals of receiver reception, and receiver carries out the system that computing obtains receiver location according to the satellite-signal that receives.General satellite navigation system is made up of the multi-satellite that is distributed in different orbit planes, to guarantee at any time, any place in the range of application can receive the signal of multi-satellite, such as the range of application for GPS (the Global Positioning System GPS) system of present operation is the whole world, will guarantee at any time, any place in the whole world can receive the signal of at least four satellites.Satellite navigation receiver is exactly a receiving satellite signal, and according to the satellite-signal process computing that receives, obtains the device of position, time, speed.
Fig. 1 is the theory diagram of satellite navigation receiver.Satellite navigation receiver is made up of hardware and software two parts usually.Hardware components comprises antenna, radio frequency part, Base-Band Processing.Antenna changes the Navsat electromagnetic wave in the space into electric signal, and the frequency of signal is the satellite-signal wave band, is 1575.42MHz as the frequency of the L1 wave band of gps system.Radio frequency part is exported digital signal at last with navigation satellite signal amplification, down coversion, filtering, digital to analog conversion.Down coversion is meant the signal of satellite band (frequency is generally 1GHz to 2GHz) is dropped to the intermediate-freuqncy signal of several MHz to tens MHz that intermediate-freuqncy signal can further be done signal Processing.Filtering partly is a bandpass filter, with the out-of-band noise filtering.Digital to analog conversion is that process down coversion and filtered analog intermediate frequency signal are become digital signal, and digital signal can further be carried out digital signal processing.Base-Band Processing generally is a digital circuit, handles the digital intermediate frequency signal from radio frequency part, and major function is to remove direct sequence and intermediate frequency carrier.Software section operates on the flush bonding processor, and result partly carries out computing according to Base-Band Processing, writes controlled variable simultaneously to the Base-Band Processing part.Software section is by signal Processing and resolve two parts and form.Signal processing software mainly comprises parts such as satellite signal acquisition, tracking, bit synchronous, bit information extraction.Resolving the part major function is by calculating receiver location.
At present, exploitation, development satellite navigation receiver are things more time-consuming, effort, because satellite navigation receiver generally is to adopt flush bonding processor, directly debugging software is relatively more difficult on flush bonding processor, more be difficult to study algorithm, do not have debugging enironment easily, can't see a lot of M signals or data yet.Relatively Chang Yong method is: the navigation satellite signal digitizing after the down coversion is become data be sent in the computing machine, by these data of software processes, comprise the full detail and the feature of navigation satellite signal in the data in computing machine, just the carrier frequency difference.Whole software sections in the software complete simulation satellite navigation receiver and the Base-Band Processing part in the hardware are with algorithm, structure and the program of research receiver.In addition, if the satellite navigation receiver that develops software (promptly fully with Base-Band Processing part and software section in the software realization receiver) also needs same data collector.Has only (the Accord Software ﹠amp of a tame offshore company at present; System Inc.) produces the navigation satellite signal data collector of this class, and its theory diagram as shown in Figure 2.Antenna changes the electromagnetic wave signal of Navsat into electric signal.Navigation satellite signal is through low noise amplification, down coversion, filtering, and at this moment the frequency of signal has not been the satellite-signal wave band, is the intermediate-freuqncy signals of several MHz to tens MHz but become carrier frequency.Through amplifying, analog to digital conversion becomes data to intermediate-freuqncy signal again, and data are temporarily existed in the storer earlier, and after data acquisition finished, data were read from storer again, are sent to computing machine by the USB1.1 interface.The USB1.1 interface is a kind of computer interface of standard, and the data rate of interface is 12Mbit/s.The local clock oscillator is as the clock source of local carrier in the down coversion and the sampling clock of analog to digital conversion.Though this harvester can be realized the acquisition function of navigation satellite signal to a certain extent, also has following weak point.1, the interface rate of USB1.1 is 12Mbit/s, if remove additional overhead bits in the transmission, maximum transmission rate can only reach 1MB/s, and the speed of general Navsat intermediate-freuqncy signal data be several MB/s to tens MB/s, be much higher than the speed of USB1.1 interface.So can only temporarily there be data in this device in the storer earlier, after stopping data collection, again the data in the storer is sent to computing machine by the USB1.1 interface.The time of data acquisition just is subjected to the restriction of memory span like this, if adopt the storer of 256MB, also can only gather tens seconds data, and can't gather several minutes or the data of a few hours.If sampling rate bit number high or each sampling point is many, then acquisition time is also shorter; 2, because this device is after data acquisition is finished, just data are sent to computing machine, so this device can't be used to develop real-time software receiver; 3, this device can't carry out playback with the data of collection or the data of generation; 4, no external clock source input, uncontrollable intermediate frequency carrier frequency and data sampling rate.
Summary of the invention
The present invention is directed to the defective or the deficiency that exist in the prior art, a kind of system for processing navigational satellite signal is provided, adopt this system can gather navigation satellite signal in real time, continuously, for a long time, need not temporary storage the signal data of real-time collection is stored, but directly signal data is sent to computing machine.By further perfect, native system also has numeral, intermediate frequency, radio frequency playback function, the image data of storing in can the playback computing machine or the data of generation; Outside local oscillator, also have the external clock input, for you to choose, can control intermediate frequency carrier frequency and data sampling rate like this.
Technical conceive of the present invention is, by adopting the computing machine high speed interface, with the navigation satellite signal tupe that " transmits again after the data storage " in the prior art, be improved to direct transfer mode, thereby realize gathering navigation satellite signal in real time, continuously, for a long time, and can omit temporary storage.
Technical solution of the present invention is as follows:
System for processing navigational satellite signal comprises signal pickup assembly, it is characterized in that: described signal pickup assembly has the computer interface of data transmission rate greater than 12Mbit/s.
The data transmission rate of described computer interface is not less than 20Mbit/s.
Described computer interface is the USB2.0 interface.
Also comprise the signal playback device, be used for the data that to gather or the data of generation and carry out playback.
Described signal playback device has the function of digital playback, intermediate frequency playback and/or radio frequency playback.
Also comprising can be for two clock source selecting for use, and one is the clock that local oscillator produces, and another is the external clock input.
Described external clock input can be used in the intermediate frequency carrier frequency and the data sampling rate of control acquired signal, and/or the rf frequency and the playback of data rate of control playback signal.
The technology of the present invention effect is as follows:
System for processing navigational satellite signal of the present invention is a kind of effective tool of researching and developing satellite navigation receiver.Native system becomes the lower intermediate-freuqncy signal of carrier frequency with the Navsat radiofrequency signal through down coversion, becomes data through over-sampling again, and then by standard USB2.0 interface data is sent to computing machine.Native system can be gathered navigation satellite signal in real time, continuously, for a long time, and the developer can utilize algorithm, structure and program or the exploitation Satellite Navigation Software receiver of these data research satellite navigation receivers.Simultaneously, native system also can be by the data of standard USB2.0 interface receiving computer, and the radiofrequency signal that becomes Navsat again sends, with checking, debugging satellite navigation receiver.
Description of drawings
Fig. 1 is the theory of constitution block diagram of satellite navigation receiver.
Fig. 2 is the theory diagram of navigation satellite signal data collector in the prior art.
Fig. 3 comprises signal pickup assembly and signal playback device for the theory diagram of system for processing navigational satellite signal of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
The present invention is intended to solve the deficiency of above-mentioned navigation satellite signal harvester, proposes a kind of new navigation satellite signal collection and playback system.Native system adopts the high speed modular computer interface, as USB2.0 interface (speed can reach 480Mb/s), need not storer, can be continuously, in real time, for a long time data are sent to computing machine, in addition, native system also has numeral, intermediate frequency, radio frequency playback function, the image data of storing in can the playback computing machine or the data of generation.Outside local oscillator, also have the external clock input, for you to choose, can control intermediate frequency carrier frequency and data sampling rate like this.
As shown in Figure 3, Fig. 3 comprises signal pickup assembly and signal playback device for the theory diagram of system for processing navigational satellite signal of the present invention.Principal feature is: no temporary storage; Adopt high speed interface, can be continuously, in real time, long acquired signal, high speed interface comprises the computing machine high speed interface of all standards such as USB2.0; Have numeral, intermediate frequency, three kinds of playback functions of radio frequency, also can be continuously, in real time, playback signal for a long time.When carrying out digital playback, the clock frequency of playback digital signal can be provided with arbitrarily, i.e. the data transfer rate of digital playback can be provided with arbitrarily.In collection and playback reproducer, the external clock input is arranged, can choose local oscillator and external clock wantonly as the clock source.
In the navigation satellite signal collecting part, antenna changes the electromagnetic wave signal of Navsat into electric signal, and the frequency of signal is the satellite-signal wave band.Navigation satellite signal is through low noise amplification, down coversion, filtering, and at this moment the frequency of signal has not been the satellite-signal wave band, is the intermediate-freuqncy signals of several MHz to tens MHz but become carrier frequency.Through amplifying, analog to digital conversion becomes data to intermediate-freuqncy signal again.Data directly are sent to computing machine through the high speed interface of computer standard.If adopt the USB2.0 interface, then to encode the data to the USB2.0 form according to the USB2.0 agreement through the USB2.0 coding.The flank speed of USB2.0 can reach 480Mbit/s, removes necessary expense, and data transmission rate can reach 50MB/s.If sampling rate is 16MHz, the bit number of each sampling point is 2 bits, and then the data transfer rate of navigation satellite signal is 4MB/s, and the USB2.0 interface can meet the demands far away, even increase sampling rate and bit number, also can meet the demands.
The navigation satellite signal replayed section is equivalent to the inverse process of gatherer process.Data file in the computing machine is read out, and data are sent in the playback section by the high speed interface (as the USB2.0 interface) of computer standard.Data file can be the data that this acquisition system is gathered, and also can be the data that software generates, and generates data and has dirigibility, can generate the signal of any scene, the performance of checking receiver.In playback system, the high-speed data decoding of process computer standard obtains digital intermediate frequency signal, and this digital signal also can be exported, as digital playback.The numeral playback signal comprises signal clock and signal data, and the bit number of data is any, can be a bit (promptly having only a data lines), also can be many bits (many data lines are promptly arranged).The frequency of signal clock can be provided with arbitrarily, and promptly being equivalent to data transfer rate can be provided with arbitrarily, makes that the debugging receiver is convenient.The numeral playback signal can be used as the intermediate-freuqncy signal input Base-Band Processing part of satellite navigation receiver, for the other parts of debugging, the receiver of checking except that radio frequency part.After the digital to analog conversion of digital intermediate frequency signal process, the filtering, become analog if signal, analog if signal also can be exported, as the intermediate frequency playback.Analog if signal becomes the radiofrequency signal of Navsat wave band through up-conversion, amplification, and this radiofrequency signal is output as the radio frequency playback.The signal and the navigation satellite signal of radio frequency playback output are identical, can be used to debug, verify complete satellite navigation receiver.Playback section can be carried out digital playback, intermediate frequency playback and radio frequency playback in real time, continuously, for a long time.
In navigation satellite signal collection and the playback system, the clock source has two, and one is the clock that local oscillator produces, and another is the external clock input, can choose one wantonly.Clock after the selection in acquisition system as the clock source of local carrier in the down coversion and the sampling clock of analog to digital conversion, in playback system, as the clock source of modulated carrier in the data clock of digital to analog conversion and the up-conversion.The intermediate frequency carrier frequency and the data sampling rate of acquired signal can be accurately controlled in the external clock input, and the rf frequency of playback signal and playback of data rate.
This equipment is applicable to the collection and the playback of various navigation satellite signals, comprise GPS of USA system, the Galileo system in Europe, Muscovite GLONASS system etc., and the following new satellite navigation system that may occur, can gather navigation satellite signal in real time, continuously, for a long time, need not temporary storage, have functions such as digital playback, intermediate frequency playback, radio frequency playback simultaneously, also can be in real time, continuously, playback navigation satellite-signal for a long time, be the effective tool of research, checking, exploitation satellite navigation receiver and Satellite Navigation Software receiver.
Should be pointed out that the above embodiment can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.Therefore, although this instructions has been described in detail the present invention with reference to drawings and embodiments,, it will be appreciated by those skilled in the art that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of spirit of the present invention and technical spirit, and it all should be encompassed in the middle of the protection domain of patent of the present invention.
Claims (7)
1. system for processing navigational satellite signal comprises signal pickup assembly, it is characterized in that: described signal pickup assembly has the computer interface of data transmission rate greater than 12Mbit/s.
2. system for processing navigational satellite signal according to claim 1 is characterized in that: the data transmission rate of described computer interface is not less than 20Mbit/s.
3. system for processing navigational satellite signal according to claim 2 is characterized in that: described computer interface is the USB2.0 interface.
4. system for processing navigational satellite signal according to claim 1 is characterized in that: also comprise the signal playback device, be used for the data that will gather or the data of generation and carry out playback.
5. system for processing navigational satellite signal according to claim 4 is characterized in that: described signal playback device has the function of digital playback, intermediate frequency playback and/or radio frequency playback.
6. system for processing navigational satellite signal according to claim 5 is characterized in that: also comprising can be for two clock source selecting for use, and one is the clock that local oscillator produces, and another is the external clock input.
7. system for processing navigational satellite signal according to claim 6 is characterized in that: described external clock input can be used in the intermediate frequency carrier frequency and the data sampling rate of control acquired signal, and/or the rf frequency and the playback of data rate of control playback signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100120615A CN1862284A (en) | 2006-05-31 | 2006-05-31 | System for processing navigational satellite signal |
| PCT/CN2007/070064 WO2007140725A1 (en) | 2006-05-31 | 2007-05-29 | A navigation satellite signal processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100120615A CN1862284A (en) | 2006-05-31 | 2006-05-31 | System for processing navigational satellite signal |
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| CN1862284A true CN1862284A (en) | 2006-11-15 |
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| WO (1) | WO2007140725A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007140725A1 (en) * | 2006-05-31 | 2007-12-13 | Olinkstar Corporation, Ltd. | A navigation satellite signal processing system |
| CN101825695A (en) * | 2009-03-04 | 2010-09-08 | 重庆星熠导航设备有限公司 | Multi-module embedded combined navigation receiver and positioning method |
| US7999731B2 (en) | 2007-06-29 | 2011-08-16 | Mstar Semiconductor, Inc. | GPS data recording apparatus and related method thereof |
| CN102279401A (en) * | 2011-04-01 | 2011-12-14 | 北京遥测技术研究所 | Recording-type satellite signal simulation method |
| CN102508267A (en) * | 2011-10-09 | 2012-06-20 | 东南大学 | Intermediate frequency data acquisition and playback system in GNSS (global navigation satellite system) receiver |
| CN101055309B (en) * | 2007-05-25 | 2012-07-04 | 北京东方联星科技有限公司 | Configurable general radio frequency processing method and system of navigation satellite signal |
| CN102590827A (en) * | 2012-02-16 | 2012-07-18 | 武汉大学 | Global navigation satellite system (GNSS) receiver system with intermediate frequency recording and replaying functions |
| CN112731482A (en) * | 2020-12-10 | 2021-04-30 | 北京天海达科技有限公司 | B3 frequency point text data receiving and playback system and method |
| CN112910544A (en) * | 2021-02-05 | 2021-06-04 | 上海航天测控通信研究所 | On-orbit configurable satellite-borne L/S frequency band data broadcast distribution system |
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| CN107202998B (en) * | 2017-06-19 | 2023-09-29 | 北京航天长征飞行器研究所 | Real-time satellite signal simulator and simulation method for power line communication |
| CN109765579A (en) * | 2019-01-17 | 2019-05-17 | 上海华测导航技术股份有限公司 | GNSS signal digital collection playback system |
| CN113534201B (en) * | 2020-04-20 | 2022-07-26 | 千寻位置网络有限公司 | Satellite positioning test method and system |
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| US6133871A (en) * | 1995-10-09 | 2000-10-17 | Snaptrack, Inc. | GPS receiver having power management |
| US6816710B2 (en) * | 1998-05-06 | 2004-11-09 | Snaptrack, Inc. | Method and apparatus for signal processing in a satellite positioning system |
| US9020756B2 (en) * | 1999-04-23 | 2015-04-28 | Global Locate, Inc. | Method and apparatus for processing satellite positioning system signals |
| CN1244465C (en) * | 2001-08-24 | 2006-03-08 | 厦门雅迅网络股份有限公司 | Method for processing location data incapable of being sent in signal blind zone of GSM system |
| CN100390504C (en) * | 2002-12-26 | 2008-05-28 | 邢铭时 | Satellite navigation positioning systems |
| CN2685979Y (en) * | 2004-03-19 | 2005-03-16 | 浙江大学 | Paralled to serial conversion circuit for universal serial interface of bus interface circuit computer |
| CN1862284A (en) * | 2006-05-31 | 2006-11-15 | 北京东方联星科技有限公司 | System for processing navigational satellite signal |
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2006
- 2006-05-31 CN CNA2006100120615A patent/CN1862284A/en active Pending
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2007
- 2007-05-29 WO PCT/CN2007/070064 patent/WO2007140725A1/en active Application Filing
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007140725A1 (en) * | 2006-05-31 | 2007-12-13 | Olinkstar Corporation, Ltd. | A navigation satellite signal processing system |
| CN101055309B (en) * | 2007-05-25 | 2012-07-04 | 北京东方联星科技有限公司 | Configurable general radio frequency processing method and system of navigation satellite signal |
| US7999731B2 (en) | 2007-06-29 | 2011-08-16 | Mstar Semiconductor, Inc. | GPS data recording apparatus and related method thereof |
| CN101825695A (en) * | 2009-03-04 | 2010-09-08 | 重庆星熠导航设备有限公司 | Multi-module embedded combined navigation receiver and positioning method |
| CN102279401A (en) * | 2011-04-01 | 2011-12-14 | 北京遥测技术研究所 | Recording-type satellite signal simulation method |
| CN102508267A (en) * | 2011-10-09 | 2012-06-20 | 东南大学 | Intermediate frequency data acquisition and playback system in GNSS (global navigation satellite system) receiver |
| CN102590827A (en) * | 2012-02-16 | 2012-07-18 | 武汉大学 | Global navigation satellite system (GNSS) receiver system with intermediate frequency recording and replaying functions |
| CN102590827B (en) * | 2012-02-16 | 2013-12-18 | 武汉大学 | Global navigation satellite system (GNSS) receiver system with intermediate frequency recording and replaying functions |
| CN112731482A (en) * | 2020-12-10 | 2021-04-30 | 北京天海达科技有限公司 | B3 frequency point text data receiving and playback system and method |
| CN112731482B (en) * | 2020-12-10 | 2023-11-14 | 北京天海达科技有限公司 | B3 frequency point text data receiving and playback system and method |
| CN112910544A (en) * | 2021-02-05 | 2021-06-04 | 上海航天测控通信研究所 | On-orbit configurable satellite-borne L/S frequency band data broadcast distribution system |
| CN112910544B (en) * | 2021-02-05 | 2022-11-25 | 上海航天测控通信研究所 | On-orbit configurable satellite-borne L/S frequency band data broadcast distribution system |
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| WO2007140725A1 (en) | 2007-12-13 |
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