CN101907698A - Signal process device of multiple satellite positioning system and method thereof - Google Patents
Signal process device of multiple satellite positioning system and method thereof Download PDFInfo
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- CN101907698A CN101907698A CN2009101435461A CN200910143546A CN101907698A CN 101907698 A CN101907698 A CN 101907698A CN 2009101435461 A CN2009101435461 A CN 2009101435461A CN 200910143546 A CN200910143546 A CN 200910143546A CN 101907698 A CN101907698 A CN 101907698A
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Abstract
The invention discloses a signal processing device of multiple satellite positioning system, comprising a band-pass filter, a local oscillating circuit, a first mixer circuit, a second mixer circuit, an analog-to-digital converter and a base frequency circuit. The invention can utilize single signal path to achieve the effect of processing radio frequency signal of three positioning systems GPS, Galileo and GLONASS by virtue of appropriate frequency planning, and further the aim of saving hardware cost is effectively achieved.
Description
Technical field
(global navigation satellite system, GNSS) technology refers to a kind of signal process device applicable to multiple satellite positioning system especially to the present invention relates to GLONASS (Global Navigation Satellite System).
Background technology
Along with North America Global Positioning System (GPS) (GPS) is popularized, European Union's Galileo (Galileo) and Muscovite GLONASS (Global Navigation Satellite System) (Global Navigation System, GLONASS) progressively build and to put, even the big-dipper satellite system of China also estimates to build to put at the year two thousand twenty to finish, and the application of GLONASS (Global Navigation Satellite System) will be more general.Therefore, the GNSS receiver that mobile phone is built-in no longer is confined to traditional gps receiver, and the GNSS that integrates GPS, GLONASS and three kinds of positioning systems of GALILEO is integrated receiver, and the different GNSS signals of optionally connected receipts position computing; Or receive GNSS signal more than two simultaneously, can reach positioning function more accurately, and then more reliable navigation information is provided.
Though at present the GNSS that proposed of industry integrates receiver architecture and can support a plurality of positioning systems simultaneously, the signal of different frequency bands is handled in the signal path (signal path) that hardware aspect then need possess corresponding number.For example, the U.S. the 7th, 358, No. 896 patent documentation proposes a kind of multiband GNSS receiver, system supports GPS, Galileo, three positioning systems of GLONASS, and hardware then possesses the signal that three kinds of different frequency bands are handled in three signal paths, but relative circuit cost can improve.The present invention can receive the signal of a plurality of GNSS by integrating the RF receiving circuit, to reduce circuit cost.
Summary of the invention
Technical matters to be solved by this invention provides a kind of signal process device and method of multiple satellite positioning system, can pass through suitably frequency planning, reach the effect of the radio-frequency (RF) signal of handling GPS, Galileo, three positioning systems of GLONASS by single signal path, and then effectively reach the purpose of saving hardware cost.
In order to solve above technical matters, the invention provides following technical scheme:
The invention provides a kind of signal process device that is used for multiple satellite positioning system, be used to receive a radio-frequency (RF) signal, and according to an operator scheme, determine this signal process device configuration, to produce to a baseband signal that should operator scheme, this device comprises: a bandpass filter, in order to be positioned at frequency range that this multiple satellite positioning system is contained signal in addition in this radio-frequency (RF) signal of filtering, to produce a rf filtering signal; One local oscillation circuit in order to according to this operator scheme, produces one first oscillation signal and one second oscillation signal; One first mixting circuit in order to this first oscillation signal and this rf filtering signal mixing, and according to this operator scheme, is handled this mixing signal, to produce one first intermediate frequency signal; One second mixting circuit in order to this second oscillation signal and this first intermediate frequency signal mixing, and behind the mirror image signal in this mixing signal of filtering, produces one second intermediate frequency signal; One analog-digital converter is in order to carry out the analog digital conversion process with this second intermediate frequency signal, to produce a digital signal; And a baseband circuit comprises a plurality of fundamental frequency processors, and according to this operator scheme, starts corresponding fundamental frequency processor, and in order to receive this digital signal, the row decoding of going forward side by side is handled.
The present invention also provides a kind of signal process device that is used for multiple satellite positioning system, be used to receive a radio-frequency (RF) signal, and according to an operator scheme, determine this signal process device configuration, to produce a baseband signal that should operator scheme, wherein this multiple satellite positioning system has identical centre frequency, and this device comprises: a bandpass filter, in order to be positioned at frequency range that this multiple satellite positioning system is contained signal in addition in this radio-frequency (RF) signal of filtering, to produce a rf filtering signal; One local oscillation circuit in order to according to this centre frequency, produces an oscillation signal; One mixting circuit in order to this oscillation signal and this rf filtering signal mixing, and according to this operator scheme, is handled this mixing signal, to produce an intermediate frequency signal; One analog-digital converter is in order to carry out the analog digital conversion process with this intermediate frequency signal, to produce a digital signal; And a baseband circuit comprises a plurality of fundamental frequency processors, and according to this operator scheme, starts corresponding fundamental frequency processor, and in order to receive this digital signal, the row decoding of going forward side by side is handled.
Originally returning provides a kind of signal processing method that is used for multiple satellite positioning system, be used to receive a radio-frequency (RF) signal, and according to an operator scheme, determine this signal process device configuration, to produce to a baseband signal that should operator scheme, the method includes the steps of: be positioned at frequency range that this multiple satellite positioning system is contained signal in addition in this radio-frequency (RF) signal of filtering, to produce a rf filtering signal; According to this operator scheme, produce one first oscillation signal and one second oscillation signal; With this first oscillation signal and this rf filtering signal mixing, and, handle this mixing signal, to produce one first intermediate frequency signal according to this operator scheme; With one second oscillation signal and this first intermediate frequency signal mixing, and behind the mirror image signal in this mixing signal of filtering, produce one second intermediate frequency signal; This second intermediate frequency signal is carried out the analog digital conversion process, to produce a digital signal; And, according to this operator scheme, this digital signal is carried out baseband signal handle.
Of the present invention be used for multiple satellite positioning system signal process device, can pass through suitably frequency planning, reach the effect of the RF signal of handling GPS, Galileo, three positioning systems of GLONASS by single signal path, and then reach the purpose of saving hardware cost.
Other purpose of the present invention and advantage can be further understood from the disclosed technical characterictic of the present invention.For above and other objects of the present invention, feature and advantage can be become apparent, embodiment cited below particularly also cooperates appended graphicly, is described in detail below.
Description of drawings
Fig. 1 is the frequency band distribution plan of GPS, Galileo, three positioning systems of GLONASS.
Fig. 2 is the calcspar of an embodiment of the signal process device of multiple satellite positioning system of the present invention.
Fig. 3 for the present invention synchronously and the calcspar of an embodiment of the signal process device of multiple satellite positioning system.
Fig. 4 for the present invention synchronously and the calcspar of another embodiment of the signal process device of multiple satellite positioning system.
[primary clustering symbol description]
The signal process device of 200 multiple satellite positioning systems
210 bandpass filter
220 low noise amplifiers
230,240,430,440 mirror images suppress mixting circuit
231,233,431,433,241,243,441,443 both-end balanced type frequency mixer
232,242,432,442 phase deviation devices
234,434 polyphase filters
245,445 complex filters
251,451 variable gain amplifiers
253,453 automative interest increasing controlling circuits
252,452 analog-digital converters
271,281 local oscillators
260,460 baseband circuits
261GPS fundamental frequency processor
262Galileo fundamental frequency processor
263Glonass fundamental frequency processor
300,400 synchronously and the signal process device of multiple satellite positioning system
Embodiment
Fig. 1 is the frequency band distribution plan of GPS, Galileo, three positioning systems of GLONASS.
Main conception of the present invention system is by frequency planning suitably, and allow the RF signal of the positioning system that the user selects pass through, and the RF signal of other positioning system of not choosing is used as mirror image signal (image signal), and with its inhibition.In view of the above, the present invention can only utilize a signal path to reach the effect of the RF signal of handling GPS, Galileo, three positioning systems of GLONASS, and then reaches the purpose of saving hardware cost.
Fig. 2 is the calcspar of an embodiment of the global navigational satellite system receiver of multiplex mode of the present invention.As shown in Figure 2, the signal process device 200 of multiple satellite positioning system of the present invention comprises a bandpass filter (band-pass filter) 210, one low noise amplifier (Low Noise Amplifier, LNA) 220, two mirror images suppress mixting circuit (image reject mixer) 230,240, one variable gain amplifier (variable gain amplifier) 251, one automative interest increasing controlling circuit (automatic gain control, AGC) 253, one analog-digital converter (analog to digital converter, ADC) 252, two local oscillators (local oscillator) 271,281 and one baseband circuit 260.The signal transmission is an example with differential (differential) signal among the 2nd figure, can strengthen noise immunity (noise immunity), but be not limited to differential wave, also can be single-ended (single sideband) signal.The signal process device 200 of multiple satellite positioning system of the present invention is the many reset bit pattern that are applicable to GPS station-keeping mode or Galileo station-keeping mode or Glonass station-keeping mode or GPS and Galileo.Below the operator scheme of hypothesis user selection is the GPS station-keeping mode, describes present embodiment in detail.
After bandpass filter 210 receives the RF signal via antenna, near the signal filtering noise and other non-1.5GHz and the non-1.6GHz, the i.e. signal of the non-gps system of filtering, the affiliated frequency range of non-Galileo system and non-Glonass system.Then, low noise amplifier 101 is amplified to a suitable level with the output signal of bandpass filter 210.According to the composition and the operator scheme of multiple satellite positioning system, produce a frequency and select signal, local oscillator 271 receives a frequency and selects signal, to produce this locality first oscillator signal LO1_I, the LO1_I_ of pair of differential; Another local oscillator 281 also receives this frequency and selects signal, to produce this locality second oscillator signal LO2_I, the LO2_I_ of pair of differential.Wherein, to select signal be that composition and operator scheme according to multiple satellite positioning system determines (if select the Glonass station-keeping mode, also must be according to number of channels n, n=0～24 determine local oscillated signal) for this frequency.In the present embodiment, multiple satellite positioning system comprises gps system, Galileo system and Glonass system, wherein gps system is identical with the centre frequency of Galileo system, all be positioned at the 1574.42MHz place, and the centre frequency of Glonass system is positioned at the 1613.1093MHz place.Therefore, the frequency of the first oscillator signal LO1_I, the LO1_I_ of local oscillator 271 generations is made as (1575.42+1613.1093)/2=1594.2646 (MHz).At this moment, the signal of gps system and Galileo system is first intermediate frequency signal (is positioned at 18.8446 (=1594.2646-1575.42) MHz), and the signal of Glonass system is used as the mirror image signal.
Mirror image suppresses mixting circuit 230 and comprises an orthogonal mixer (quadrature, mixer is to be made up of 231,233 in two both-end balanced type frequency mixer (double-balanced mixer)), a phase deviation device (phase shifter) 232 and one polyphase filters (polyphase filter) 234.After phase deviation device 232 receives the first oscillator signal LO1_I, LO1_I_, and with phase deviation 0/90 degree, to produce four signal LO1_I, LO1_I_, LO1_Q, LO1_Q_ (figure does not show).Wherein, homophase signal LO1_I and complementary signal LO1_I_ thereof are by feed-in both-end balanced type frequency mixer 231, and quadrature phase signal LO1_Q and complementary signal LO1_Q_ thereof are by feed-in both-end balanced type frequency mixer 233.After the homophase signal LO1_I and complementary signal LO1_I_ mixing thereof of both-end balanced type frequency mixer 231 with the output signal of low noise amplifier 220 and first oscillator signal, produce the homophase signal I1 and the complementary signal I1_ thereof of first intermediate frequency (be positioned at 18.8446 (=1594.2646-1575.42) MHz); And after the quadrature phase signal LO1_Q and complementary signal LO1_Q_ mixing thereof of both-end balanced type frequency mixer 233 with the output signal of low noise amplifier 220 and first oscillator signal, produce the quadrature phase signal Q1 and the complementary signal Q1_ thereof of this first intermediate frequency.According to operator scheme, set the position of the centre frequency of polyphase filters 234 at first intermediate frequency, and by suitably disposing four input signal I1, I1_, Q1, Q1_, differentiate processing to carry out phase place, that is allow phase place is that the GPS signal that is rotated counterclockwise passes through in four input signals, and filtering is exported four orthogonal signal FI1, FI1_, FQ1, the FQ1_ (figure does not show) of filtered first intermediate frequency after wherein phase place is the mirror image signal (Glonass signal) that turns clockwise.
In the present embodiment, local oscillator 281 is also selected signal according to said frequencies, with the second oscillator signal LO2_I, the LO2_I_ that produces, and the frequency of the second oscillator signal LO2_I, LO2_I_ is made as 18.8446+bw1 (equaling 4 in this example)=22.8446 (MHz).Wherein, bw1 system adjusts according to required frequency range of operator scheme and fundamental frequency processor 260 De Xie Code demands.
Mirror image suppresses mixting circuit 240 and comprises an orthogonal mixer (being to be made up of 241,243 in two both-end balanced type frequency mixer), a phase deviation device 242 and a complex filter (complex filter) 245.Wherein, the function of phase deviation device 242 is identical with function mode and phase deviation device 232, repeats no more.After the homophase signal LO2_I signal LO2_I_ complementary mixing of both-end balanced type frequency mixer 241 with the homophase signal FI1 signal FI1_ complementary of filtered first intermediate frequency and second oscillator signal, produce the homophase signal I2 and the complementary signal I2_ thereof of second intermediate frequency (being positioned at 4MHz) with it with it; And after the quadrature phase signal LO2_Q signal LO2_Q_ complementary mixing of both-end balanced type frequency mixer 243 with the quadrature phase signal FQ1 signal FQ1_ complementary of filtered first intermediate frequency and second oscillator signal, produce the quadrature phase signal Q2 and the complementary signal Q2_ thereof of second intermediate frequency with it with it.According to operator scheme, the centre frequency of complex filter 245 is transferred to second intermediate frequency (being positioned at 4MHz) and its bandwidth bw2 is also determined by operator scheme.During complex filter 245 running just like a bandpass filter, after receiving four input signal I2, I2_, Q2, Q2_, by the positive frequency component or the negative frequency components that optionally suppress second intermediate frequency,, export second intermediate frequency signal after the filtering of pair of differential at last with filtering mirror image signal.
Then, variable gain amplifier 251 with above-mentioned filtering after second intermediate frequency signal be amplified to a particular level, and the voltage gain of variable gain amplifier 251 is to be controlled by an automative interest increasing controlling circuit 253.Then, analog-digital converter 252 converts the output signal of variable gain amplifier 251 digital signal of pair of differential to, and is sent to baseband circuit 260.Baseband circuit 260 comprises a GPS fundamental frequency processor 261, a Galileo fundamental frequency processor 262 and a Glonass fundamental frequency processor 263, is according to operator scheme, to start corresponding fundamental frequency processor.In the present embodiment, because operator scheme is the GPS station-keeping mode, baseband circuit 260 has only the GPS of startup fundamental frequency processor 261, and (code division multiple access, CDMA) decoding and follow-up digital signal are handled to carry out demal multitask access with the digital signal to input.Be positioned at the signal of the Galileo system of similar frequency bands with gps system, because coding and multi-tasking method difference that both use, can when baseband signal is handled, decipher out the signal of two different systems respectively.
When operator scheme is selected the Galileo station-keeping mode for the user, the signal process device 200 of multiple satellite positioning system of the present invention, system is except the demand of foundation Galileo system, adjust parameter b w1, bw2 (its value that is set in theory can greater than the value that is set when the GPS station-keeping mode) and baseband circuit 260 and can start with respect to starting outside the Galileo fundamental frequency processor 262, all the other parameters and circuit running are all identical with the GPS station-keeping mode.When operator scheme is when the user selects GPS and Galileo station-keeping mode, system is except starting GPS fundamental frequency processor 261 and Galileo fundamental frequency processor 262 simultaneously, all the other parameters and circuit running all identical (owing to the bw1 and the bw2 value of Galileo system, all greater than gps system) with the Galileo station-keeping mode.And when operator scheme is selected Glonass station-keeping mode (supposing to select channel 6) for the user, the first oscillator signal LO1_I, the frequency of LO1_I_ is set as (1575.42+1602+0.5625x6)/2=1590.3975 (MHz), the signal process device 200 of multiple satellite positioning system is except that the demand according to the Glonass system at this moment, adjust parameter b w1, outside the size of bw2, and the centre frequency of setting polyphase filters 234 is in the position of first intermediate frequency, and by suitably disposing four input signal I1, I1_, Q1, Q1_, differentiate processing to carry out phase place, that is allow phase place is that the mirror image signal (Glonass signal) that turns clockwise passes through in four input signals, and filtering is after wherein phase place is the GPS signal that is rotated counterclockwise, export four orthogonal signal FI1 of filtered first intermediate frequency, FI1_, FQ1, FQ1_, and baseband circuit 260 can start Glonass fundamental frequency processor 263, and the remaining circuit running is all identical with the GPS station-keeping mode.
Fig. 3 for the present invention synchronously and the calcspar of an embodiment of the signal process device of multiple satellite positioning system.Comparison diagram 2 is with the difference that Fig. 3 can observe therebetween, the present invention synchronously and the signal process device 300 of multiple satellite positioning system be a both-end balanced type frequency mixer 231 to be set replace mirror image and suppress mixting circuit 230, its cause description in after.The present invention synchronously and the signal process device 300 of multiple satellite positioning system be many reset bit pattern of many reset bit pattern of being applicable to a GPS and Glonass, Galileo and Glonass and many reset bit pattern of GPS and Galileo and Glonass.Below the hypothesis user selects many reset bit pattern of GPS and Glonass (supposing to select channel 6), present embodiment is described, and synchronously and the identical circuit part of the signal process device 200 of the signal process device 300 of multiple satellite positioning system and multiple satellite positioning system, then repeat no more.
When the phase one frequency reducing, present embodiment system utilizes a pair of end balanced type frequency mixer 231 that GPS signal and Glonass signal are dropped to first intermediate frequency (being positioned at 14.9775MHz) simultaneously, reach the purpose that receives GPS signal and Glonass signal simultaneously, and need not handle the problem of mirror image signal, this is because GPS signal and Glonass signal are all the required signal of user.Please note, because all encode with CDMA technology at transmitter (transmitter) end GPS signal and Glonass signal, even therefore GPS signal and Glonass signal are located to overlap at first intermediate frequency (being positioned at 14.9775MHz), the GPS fundamental frequency processor 261 of back level and Glonass fundamental frequency processor 263 still can obtain baseband signal separately respectively after carrying out CDMA decoding.In addition, benchmark is done to have than the station-keeping mode of broadband band by the adjustment of parameter b w1, bw2 system, with present embodiment, should be as the criterion with the GPS station-keeping mode.Function mode as for many reset bit pattern of many reset bit pattern of Galileo and Glonass and GPS and Galileo and Glonass also is similar, repeats no more.
Fig. 4 for the present invention synchronously and the calcspar of an embodiment of the signal process device of multiple satellite positioning system.The difference that comparison diagram 2, Fig. 3 and Fig. 4 can observe therebetween is, the present invention's signal process device 400 synchronous and multiple satellite positioning system is that two signal paths up and down are set, the circuit arrangement in two signal paths much at one, and is only variant in the baseband circuit part.The signal path of the first half is in order to handle the GPS signal or the Galileo signal in the 1st figure left side, so 460 of baseband circuits comprise a GPS fundamental frequency processor 261 and a Galileo fundamental frequency processor 262.Simultaneously, gps system is identical with the centre frequency of Galileo system, all is positioned at the 1574.42MHz place.Therefore, the first oscillator signal LO1_I that local oscillator produced, the frequency of LO1_I_ are made as the 1575.42MHz place.Mirror image suppresses mixting circuit 230 can be according to first oscillator signal, directly with near second intermediate frequency of radio-frequency (RF) signal (can also secondary serial connection mode radio-frequency (RF) signal be reduced to first intermediate frequency earlier, reduce to second intermediate frequency again, as shown in Figure 4), to produce second intermediate frequency signal.The signal path of Lower Half is then in order to handle the Glonass signal on Fig. 1 right side, so the baseband circuit part only comprises a Glonass fundamental frequency processor 263, simultaneously, mirror image suppresses mixting circuit 430 can be according to first oscillator signal that demand produced of Glonass system, directly near second intermediate frequency of radio-frequency (RF) signal (can also secondary serial connection mode be reduced to first intermediate frequency earlier with radio-frequency (RF) signal, reduce to second intermediate frequency again, as shown in Figure 4), to produce second intermediate frequency signal.Present embodiment system is applicable to one of them or its combination of a GPS station-keeping mode, a Galileo station-keeping mode and a Glonass station-keeping mode.
Two embodiment compared to the front, though many signal paths of present embodiment, but when the user selects multiplex mode (except many reset bit pattern of GPS and Galileo) equally, the news of present embodiment are assorted than (signal to noise ratio, SNR) can be better than the embodiment of Fig. 3, the dealer can select different embodiment according to the demand of cost or performance.
The specific embodiment that is proposed in the detailed description of preferred embodiment is only in order to convenient explanation technology contents of the present invention, but not with narrow sense of the present invention be limited to the foregoing description, in the situation that does not exceed spirit of the present invention and claim, the many variations of being done is implemented, and all belongs to scope of the present invention.
Though more than with embodiment the present invention is described, therefore do not limit scope of the present invention, only otherwise break away from main idea of the present invention, the sector person can carry out various distortion or change.
Claims (19)
1. a signal process device that is used for multiple satellite positioning system is used to receive a radio-frequency (RF) signal, and according to an operator scheme, determine described signal process device configuration, to produce a baseband signal of corresponding described operator scheme, it is characterized in that described signal process device comprises:
One bandpass filter is in order to be positioned at frequency range that described multiple satellite positioning system is contained signal in addition in the described radio-frequency (RF) signal of filtering, to produce a rf filtering signal;
One local oscillation circuit in order to according to described operator scheme, produces one first oscillation signal and one second oscillation signal;
One first mixting circuit in order to described first oscillation signal and the mixing of described rf filtering signal, and according to described operator scheme, is handled this mixing signal, to produce one first intermediate frequency signal;
One second mixting circuit in order to described second oscillation signal and the described first intermediate frequency signal mixing, and behind the mirror image signal in the described mixing signal of filtering, produces one second intermediate frequency signal;
One analog-digital converter is in order to carry out the analog digital conversion process with described second intermediate frequency signal, to produce a digital signal; And
One baseband circuit comprises a plurality of fundamental frequency processors, and according to described operator scheme, starts corresponding fundamental frequency processor, and in order to receive described digital signal, the row decoding of going forward side by side is handled to produce described baseband signal.
2. signal process device as claimed in claim 1 is characterized in that, described first mixting circuit comprises:
One first phase deviation device receives described first oscillation signal, carries out phase deviation, to produce first oscillation signal of a homophase and quadrature phase;
One first orthogonal mixer is with the first oscillation signal mixing of described rf filtering signal and described homophase and quadrature phase, to produce first intermediate frequency signal of a homophase and quadrature phase; And
One polyphase filters connects described first orthogonal mixer, in order to according to described operator scheme, determines centre frequency, and the image signal of first intermediate-freuqncy signal of described homophase of filtering and quadrature phase, to produce described first intermediate frequency signal.
3. signal process device as claimed in claim 2 is characterized in that, described first orthogonal mixer is made up of two both-end balanced type frequency mixer.
4. signal process device as claimed in claim 1 is characterized in that, described second mixting circuit comprises:
One second phase deviation device receives described second oscillation signal, carries out phase deviation, to produce second oscillation signal of a homophase and quadrature phase;
One second orthogonal mixer is with the second oscillation signal mixing of described first intermediate frequency signal and described homophase and quadrature phase, to produce second intermediate frequency signal of a homophase and quadrature phase; And
One complex filter connects described second orthogonal mixer, behind the image signal of second intermediate-freuqncy signal of described homophase of filtering and quadrature phase, to produce described second intermediate-freuqncy signal.
5. signal process device as claimed in claim 4 is characterized in that, described second orthogonal mixer is made up of two both-end balanced type frequency mixer.
6. signal process device as claimed in claim 1 is characterized in that, described local oscillation circuit can be substituted by one first local oscillation circuit and one second local oscillation circuit, in order to produce described first oscillation signal and described second oscillation signal respectively.
7. signal process device as claimed in claim 1 is characterized in that it also comprises:
One variable gain amplifier is in order to amplify described second intermediate frequency signal.
8. signal process device as claimed in claim 1, it is characterized in that wherein said operator scheme comprises a Global Positioning System (GPS) station-keeping mode, a Galileo station-keeping mode, a GLONASS (Global Navigation Satellite System) station-keeping mode and a Global Positioning System (GPS) and Galileo station-keeping mode.
9. signal process device as claimed in claim 8 is characterized in that, more described fundamental frequency treatment circuit comprises a Global Positioning System (GPS) fundamental frequency processor, a Galileo fundamental frequency processor and a GLONASS (Global Navigation Satellite System) fundamental frequency processor.
10. signal process device as claimed in claim 1 is characterized in that the frequency of described first oscillation signal is between the centre of the global position system of two different center frequency.
11. signal process device as claimed in claim 9 is characterized in that, the frequency of described first oscillation signal is (1575.42+1613.1093)/2 megahertzes.
12. a signal process device that is used for multiple satellite positioning system is used to receive a radio-frequency (RF) signal, and according to an operator scheme, determine described signal process device configuration, to produce a baseband signal of corresponding described operator scheme, it is characterized in that described signal process device comprises:
One bandpass filter is in order to be positioned at frequency range that described multiple satellite positioning system is contained signal in addition in the described radio-frequency (RF) signal of filtering, to produce a rf filtering signal;
One local oscillation circuit in order to according to a centre frequency, produces an oscillation signal;
One mixting circuit in order to described oscillation signal and the mixing of described rf filtering signal, and according to described operator scheme, is handled described mixing signal, to produce an intermediate frequency signal;
One analog-digital converter is in order to carry out the analog digital conversion process with described intermediate frequency signal, to produce a digital signal; And
One baseband circuit comprises a plurality of fundamental frequency processors, and according to described operator scheme, starts corresponding fundamental frequency processor, and in order to receive described digital signal, the row decoding of going forward side by side is handled to produce described baseband signal.
13. signal process device as claimed in claim 12 is characterized in that, described mixting circuit comprises:
One phase deviation device receives described oscillation signal, carries out phase deviation, to produce the oscillation signal of a homophase and quadrature phase;
One orthogonal mixer is with the oscillation signal mixing of described rf filtering signal and described homophase and quadrature phase, to produce the intermediate frequency signal of a homophase and quadrature phase; And
One wave filter connects described orthogonal mixer, in order to according to described operator scheme, determines centre frequency, and the image signal of the intermediate-freuqncy signal of described homophase of filtering and quadrature phase, to produce described intermediate frequency signal.
14. signal process device as claimed in claim 13 is characterized in that, described orthogonal mixer is made up of two both-end balanced type frequency mixer.
15. signal process device as claimed in claim 12 is characterized in that, it also comprises:
One variable gain amplifier is in order to amplify described intermediate frequency signal.
16. signal process device as claimed in claim 12 is characterized in that, described operator scheme comprises a Global Positioning System (GPS) station-keeping mode, a Galileo station-keeping mode and a Global Positioning System (GPS) and Galileo station-keeping mode; More described fundamental frequency treatment circuit comprises a Global Positioning System (GPS) fundamental frequency processor, a Galileo fundamental frequency processor.。
17. a signal processing method that is used for multiple satellite positioning system is used to receive a radio-frequency (RF) signal, and according to an operator scheme, determine described signal process device configuration, to produce a baseband signal of corresponding described operator scheme, it is characterized in that described signal processing method comprises following steps:
Be positioned at frequency range that described multiple satellite positioning system is contained signal in addition in the described radio-frequency (RF) signal of filtering, to produce a rf filtering signal;
According to described operator scheme, produce one first oscillation signal and one second oscillation signal;
With described first oscillation signal and the mixing of described rf filtering signal, and, handle described mixing signal, to produce one first intermediate frequency signal according to described operator scheme;
With described second oscillation signal and the described first intermediate frequency signal mixing, and behind the mirror image signal in the described mixing signal of filtering, produce one second intermediate frequency signal;
Described second intermediate frequency signal is carried out the analog digital conversion process, to produce a digital signal; And
According to described operator scheme, described digital signal is carried out baseband signal handle to produce described baseband signal.
18. signal processing method as claimed in claim 17, it is characterized in that described operator scheme comprises a Global Positioning System (GPS) station-keeping mode, a Galileo station-keeping mode, a GLONASS (Global Navigation Satellite System) station-keeping mode and a Global Positioning System (GPS) and Galileo station-keeping mode.
19. signal processing method as claimed in claim 17 is characterized in that, the frequency of described first oscillation signal is between the centre of the global position system of two different center frequency.
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| CN102279403A (en) * | 2011-04-25 | 2011-12-14 | 上海迦美信芯通讯技术有限公司 | Dual channel navigation radio frequency receiver |
| CN102323600A (en) * | 2011-07-01 | 2012-01-18 | 上海迦美信芯通讯技术有限公司 | System architecture of dual-channel navigation radio-frequency receiver |
| CN102445699A (en) * | 2011-10-18 | 2012-05-09 | 上海迦美信芯通讯技术有限公司 | System structure for double-channel navigating radio-frequency receiver sharing radio-frequency front end |
| CN102540204A (en) * | 2010-12-31 | 2012-07-04 | 杭州中科微电子有限公司 | Single-chip dual-frequency global satellite navigation receiver |
| CN110095795A (en) * | 2019-04-23 | 2019-08-06 | 青岛海信移动通信技术股份有限公司 | A kind of localization method of mobile terminal and free switching difference positioning system |
| CN110196437A (en) * | 2018-02-26 | 2019-09-03 | 瑞昱半导体股份有限公司 | Satellite signal receiving circuit and satellite signal reception method |
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| CN101197606B (en) * | 2006-12-04 | 2012-03-07 | 京信通信技术(广州)有限公司 | Digital intermediate frequency conversion method and system used in repeater |
| 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 |
| CN101303403B (en) * | 2007-06-11 | 2011-01-26 | 杭州中科微电子有限公司 | Multi-mode satellite navigation receiving radio frequency front end chip |
| KR20090032391A (en) * | 2007-09-27 | 2009-04-01 | 삼성전기주식회사 | Gps signal receiver |
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2009
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|---|---|---|---|---|
| CN102540204A (en) * | 2010-12-31 | 2012-07-04 | 杭州中科微电子有限公司 | Single-chip dual-frequency global satellite navigation receiver |
| CN102540204B (en) * | 2010-12-31 | 2014-10-29 | 杭州中科微电子有限公司 | Single-chip dual-frequency global satellite navigation receiver |
| CN102176035A (en) * | 2011-01-28 | 2011-09-07 | 北京大学 | Multimode parallel radio frequency receiving method and device orientated to satellite navigation system of next generator |
| CN102279403A (en) * | 2011-04-25 | 2011-12-14 | 上海迦美信芯通讯技术有限公司 | Dual channel navigation radio frequency receiver |
| CN102323600A (en) * | 2011-07-01 | 2012-01-18 | 上海迦美信芯通讯技术有限公司 | System architecture of dual-channel navigation radio-frequency receiver |
| CN102445699A (en) * | 2011-10-18 | 2012-05-09 | 上海迦美信芯通讯技术有限公司 | System structure for double-channel navigating radio-frequency receiver sharing radio-frequency front end |
| CN110196437A (en) * | 2018-02-26 | 2019-09-03 | 瑞昱半导体股份有限公司 | Satellite signal receiving circuit and satellite signal reception method |
| CN110095795A (en) * | 2019-04-23 | 2019-08-06 | 青岛海信移动通信技术股份有限公司 | A kind of localization method of mobile terminal and free switching difference positioning system |
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