CN101702016A - Satellite navigation system baseband signal processing system and method - Google Patents
Satellite navigation system baseband signal processing system and method Download PDFInfo
- Publication number
- CN101702016A CN101702016A CN200910090339A CN200910090339A CN101702016A CN 101702016 A CN101702016 A CN 101702016A CN 200910090339 A CN200910090339 A CN 200910090339A CN 200910090339 A CN200910090339 A CN 200910090339A CN 101702016 A CN101702016 A CN 101702016A
- Authority
- CN
- China
- Prior art keywords
- signal
- freuqncy signal
- same type
- module
- freuqncy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention discloses a satellite navigation system baseband signal processing system and a method, which is suitable for the fusing of signal processing of multiple satellite navigation systems by a receiver. The system comprises medium frequency signal interface modules which are connected with radio frequency front ends of multiple satellite navigation systems and are used for receiving medium frequency signals in different types for conversation to obtain medium frequency signal in the same type; an allocation module for storing the medium frequency signal in the same type according to a preset allocation rule; a memory for storing the medium frequency signal in the same type; a distribution module for distributing the medium frequency signal in the same type according to a preset distribution rule; and a channel gathering module which comprises a plurality of channels and is used for tracing and processing the medium frequency signal in the same type distributed by the distribution module. The processing system and method in the invention can perform fusion processing for various satellite navigation systems, has small circuit scale, meets the requirement of compatibility for the existing satellite navigation systems, and saves cost.
Description
Technical field
The present invention relates to receiver of satellite navigation system, relate in particular to Base-band Processing System and method in the receiver of satellite navigation system.
Background technology
(Global Navigation Satellite System GNSS) is the adopted name that autonomous geographical sterically defined satellite navigation system in the global range is provided of standard to GPS (Global Position System).GNSS allows small-sized electronic receiving equipment in the scope of sight line, by the radio wave signal of regular reception satellites transmits, measures its residing position (comprising longitude, latitude and height above sea level), speed and time.
Up to now, U.S.'s nautical star (NAVSTAR) GPS (GPS) is unique GNSS that obtains overall application.Current being in of Muscovite GLONASS (GLONASS) navigational system estimated in the repair process of overall application in 2010.European Union's Galileo positioning system (Galileopositioning system) also is in the initial stage deployment phase.The dipper system that China has planned and set up prepares to utilize 30 medium ground orbit satellites and 5 geo-synchronous orbit satellites.
The GNSS signal that is received by antenna will amplify and be converted to intermediate frequency (IF) signal, carry out digitized processing by analog to digital converter then.Signal by radio frequency (RF) integrated circuit (IC) output is 1-4 bit (bit), transfers to baseband I C, and baseband I C goes out the output signal of radio frequency IC by coherent detection.Adopt the local satellite replica code that produces to multiply by received signal, then the result is carried out the peak value that integration obtains coherent signal.
Fig. 1 is a kind of structural representation that receives receiver in the prior art, and this reception function receives the satellite-signal of two fixed satellite navigational system under fixed frequency separately simultaneously.As shown in Figure 1, its dotted line internal representation receiver base band 20.Satellite-signal is transformed into digital intermediate frequency signal through RF front-end module (RF) after receiving by antenna 10, directly gives the passage processing module satellite-signal is handled.Because the RF front end only can handle single-frequency, so (1～N) can only be at the characteristic frequency of a certain particular satellite system, and a passage is handled the signal of a satellite for each group passage.Such as shown in Figure 1 be the signal that a certain reception function receives two satellite systems simultaneously, then the RF front-end module RF1 under first fixed satellite system this moment can only receive the satellite-signal of this first fixed satellite system, and passage 1 is handled the signal of N satellite under this first fixed satellite system respectively to passage N; RF front-end module RF2 under the second fixed satellite system can only receive the satellite-signal of this second fixed satellite system, and passage 1 is handled the signal of M satellite under this second fixed satellite system respectively to passage M.
Because the largest passages number is subjected to physical restriction, also is what physical channels of receiver base band internal configurations, just can only handle the signal of what satellites at most.For the multifrequency receiver of multisystem, just need dispose a RF front-end module and one group of passage separately for each frequency of each satellite system.Development along with the global navigation satellite technology, multisystem merges one of the development trend that is inevitable, if enlarge receiver base band internal physical number of channels with amalgamation mode shown in Figure 1 simply, adapt to the needs that a plurality of GPS (Global Position System) merge, then will inevitably cause the receiver scale increasing, equipment cost significantly improves.
In view of this, be necessary to propose a kind of Base-band Processing System and method that is applicable to multisystem cheaply.
Summary of the invention
Technical matters to be solved by this invention, being to provide a kind of Base-band Processing System and method, is applicable to the fusion of receiver to the signal Processing of a plurality of GPS (Global Position System).
In order to solve the problems of the technologies described above, the invention provides a kind of satellite navigation system baseband signal processing system, comprising:
The intermediate-freuqncy signal interface module links to each other with the radio-frequency front-end of some satellite navigation systems, is used to receive dissimilar intermediate-freuqncy signals and change, and obtains the intermediate-freuqncy signal of same type;
Distribution module links to each other with described intermediate-freuqncy signal interface module, is used for storing according to default allocation rule the intermediate-freuqncy signal of described same type;
Storer links to each other with described distribution module, is used to store the intermediate-freuqncy signal of described same type;
Distribution module links to each other with described storer, is used for distributing according to default distribution rules the intermediate-freuqncy signal of described same type; And
The channel set compound module links to each other with described distribution module, includes some passages, is used for the intermediate-freuqncy signal of the described same type of described distribution module distribution is followed the tracks of processing.
Preferably, the radio-frequency front-end of some satellite navigation systems comprises and adopts the radio frequency integrated circuit that discrete component is realized, multi-disc standard radio frequency integrated circuit is realized or a slice is integrated to realize.
Preferably, described storer is used for storing according to frequency band the intermediate-freuqncy signal of described same type.
Preferably, this system further comprises:
Search engine, link to each other with described distribution module, comprise main by at least a equivalent correlator that constitutes in correlator, matched filter and the Fast Fourier Transform (FFT) unit, and with the supporting signal capture logic of described equivalent correlator, auxiliary described channel set compound module carries out described tracking to described intermediate-freuqncy signal to be handled.
Preferably, described intermediate-freuqncy signal interface module includes some intermediate-freuqncy signal interfaces, and each intermediate-freuqncy signal interface receives dissimilar intermediate-freuqncy signals.
Preferably, described storer includes some first-in first-out storage unit;
Described distribution module stores the intermediate-freuqncy signal of described same type in the described first-in first-out storage unit into.
Further, described channel set compound module, the some passages that comprise are divided into some channel group, and each channel group contains one or more parallel physical channel, and described some channel group are handled described intermediate-freuqncy signal according to signal type;
Described distribution module is distributed to one or more than one described channel group with the intermediate-freuqncy signal of the same type in the described first-in first-out storage unit.
Preferably, this system further comprises:
Outside pseudo-random code interface links to each other with described channel set compound module, is used for outside pseudo-random code is offered described some passages.
Preferably, this system further comprises:
Diagnostic module, link to each other with described intermediate-freuqncy signal interface module, be used to detect the interference source of the intermediate-freuqncy signal of described dissimilar or same type, remove or reduce the influence of undesired signal that described interference source produces the intermediate-freuqncy signal of described dissimilar or same type.
Preferably, this system further comprises:
The automatic gain control module is used for the gain by the described radio-frequency front-end internal amplifier of power statistic feedback regulation, optimizes the power input of described dissimilar intermediate-freuqncy signal.
Preferably, described radio-frequency front-end receives the radiofrequency signal of described some satellite navigation systems by the antenna more than one or.
In order to solve the problems of the technologies described above, the present invention also provides a kind of satellite navigation system method for processing baseband signal, comprising:
Receive some satellite navigation systems radio-frequency front-end transmission dissimilar intermediate-freuqncy signals and change, obtain the intermediate-freuqncy signal of same type;
Store the intermediate-freuqncy signal of described same type according to default allocation rule;
The intermediate-freuqncy signal of distributing the described same type of storage according to default distribution rules; And
Intermediate-freuqncy signal to the described same type of described distribution is followed the tracks of processing.
Preferably, receive described dissimilar intermediate-freuqncy signal respectively according to type.
Preferably, when described tracking is handled, the intermediate-freuqncy signal of described same type is carried out packet transaction according to signal type.
Preferably, the source of spreading code comprised when described tracking was handled, the pseudo-random code of the pseudo-random code that general pseudo-noise code generator produces, the pseudo-random code that prestores or outside input.
Preferably, this method further comprises:
Detect the interference source of the intermediate-freuqncy signal of described dissimilar or same type, remove or reduce the influence of undesired signal that described interference source produces the intermediate-freuqncy signal of described dissimilar or same type.
Preferably, this method further comprises:
By the gain of the described radio-frequency front-end internal amplifier of power statistic feedback regulation, optimize the power input of described dissimilar intermediate-freuqncy signal.
Preferably, described radio-frequency front-end receives the radiofrequency signal of described some satellite navigation systems by the antenna more than one or.
Compared with prior art, disposal system of the present invention and method can be carried out fusion treatment to multiple satellite navigation system signals, circuit scale is little, the equivalence port number is many, satisfy compatibility to existing each satellite navigation system, save cost, and adopted search engine to improve catching of receiver and tracking velocity, had the demand that following expansion is satisfied in enough big dirigibility.
Description of drawings
Fig. 1 is a kind of structural representation that receives two satellite navigation system signals receivers in the prior art;
Fig. 2 is the composition synoptic diagram of first embodiment of system of the present invention;
Fig. 3 is the composition synoptic diagram of second embodiment of system of the present invention;
Fig. 4 is Fig. 2 and detailed composition synoptic diagram embodiment illustrated in fig. 3;
Fig. 5 is the composition synoptic diagram of the 3rd embodiment of system of the present invention;
Fig. 6 is the schematic flow sheet of the inventive method embodiment.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, how the application technology means solve technical matters to the present invention whereby, and the implementation procedure of reaching technique effect can fully understand and implements according to this.
Fig. 2 merges the composition synoptic diagram of receiver baseband signal disposal system first embodiment for multisystem of the present invention.As shown in Figure 2, this Base-band Processing System first embodiment 20 mainly comprises intermediate frequency (IF) Signal interface module 210, distribution module 220, storer 230, distribution module 240 and channel set compound module 250, wherein:
IF Signal interface module 210, with radio frequency (RF) front-end module of some satellite navigation systems (among the figure by RF 1, RF 2 ..., RF n represents, n is the natural number more than or equal to 1) link to each other, be used to receive dissimilar intermediate-freuqncy signals, and these dissimilar intermediate-freuqncy signals are changed, obtain the intermediate-freuqncy signal of same type;
Storer 230 links to each other with this distribution module 220, is used for storing according to frequency band the intermediate-freuqncy signal of this same type;
Channel set compound module 250 links to each other with this distribution module 240, includes some passages, is used for processing is caught and followed the tracks of to the intermediate-freuqncy signal of this same type.
Wherein this is used for radio frequency (RF) front-end module of each satellite navigation system of signal frequency processing, can adopt discrete component to realize, also can adopt the RF IC of multi-disc standard to realize, perhaps also can adopt the integrated RF IC of a slice to realize.What adopt in the present embodiment is that the RF IC of multi-disc standard realizes.
Need to prove that each ingredient among the invention described above disposal system first embodiment is distributed on the chip.In actual applications, this each ingredient also can be dispersed on a plurality of chips, and the present invention does not do qualification to this.In fact, when IF Signal interface module 210, distribution module 220, distribution module 240 and channel set compound module 250 were laid on the chip piece, storer 230 can be laid in equally with on the chip piece, also can be distributed on other the chip.
In addition, all RF front-end modules in the system of the present invention can receive the RF signal of a plurality of satellite navigation systems by an antenna, also can receive these RF signals by many antennas.When many antennas receive these RF signals, be connected on first antenna such as RF among Fig. 21 and RF 2, RF 3 and RF 4 are connected on second antenna, and all the other RF 5 to RF n are connected on the 3rd antenna.The quantity of antenna and antenna are connected with RF front-end module, can select for use arbitrarily according to concrete application.It is that example describes that first embodiment of system of the present invention shown in Figure 2 all is connected on the antenna with all RF front-end modules.
Fig. 3 merges the composition synoptic diagram of receiver baseband signal disposal system second embodiment for multisystem of the present invention.As shown in Figure 3, this Base-band Processing System second embodiment 30 compares with first embodiment 20 shown in Figure 2, also comprises a search engine 360, and this search engine 360 is used for 250 pairs of intermediate-freuqncy signals of accessory channel collection modules and catches and follow the tracks of processing.
Above-mentioned search engine 360, link to each other with this distribution module 240, the slow defective of search speed that is used to remedy the correlator number deficiency of channel set compound module 250 internal channels and causes and being provided with, it is connected with storer 230 by distribution module 240, with the intermediate-freuqncy signal of being stored in channel set compound module 250 shared storages 230.Search engine 360 inside have main by at least a equivalent correlator that constitutes among a large amount of correlators, matched filter and Fast Fourier Transform (FFT) (FFT) this three of unit, and with the supporting signal capture logic of this equivalence correlator, realization is to the high speed of signal, catch exactly, and can give correlator bank (being made up of some correlators) and carry out signal trace catching the result.Search engine 360 is independent of the channel set compound module 250 that is used to realize the signal trace function, is in order to make the more Focus of function of both (search engines 360 with channel set compound module 250), thereby realizes function separately more efficiently.
The function and the annexation of IF Signal interface module 210, distribution module 220, storer 230, distribution module 240 and channel set compound module 250 among this second embodiment also please refer to first embodiment shown in Figure 2.
Fig. 4 is the detailed composition synoptic diagram of Fig. 2 and middle IF Signal interface module 210 embodiment illustrated in fig. 3, storer 230 and channel set compound module 250.
As shown in Figure 4, above-mentioned IF Signal interface module 210 include some IF signaling interfaces independent of each other (among the figure by IF 1, IF 2 ..., IF k represents, k is the natural number more than or equal to 1), pass through flexible configuration, these IF signaling interfaces can receive dissimilar IF signals, and the IF conversion of signals that these are dissimilar becomes the IF signal of same type, the range of choice that has greatly expanded the RF front end, reduced realization requirement, relaxed the realization restriction of RF front end the RF front end.Wherein the type of IF signal is divided according to the intermediate frequency form, can be divided into symbol-amplitude coded signal, two's complement signal and offset binary coded signal; Bit number according to each sampling point is divided, and can be divided into 1 bit signal and many bit signals; Content according to input signal is divided, and can be divided into in-phase component (In-phasecomponent is also referred to as the I branch road) one-channel signal and in-phase component and quadrature component (Quadraturecomponent is also referred to as the Q branch road) two paths of signals.
As shown in Figure 4, above-mentioned storer 230 include some FIFO (first-in first-out) storage unit (among the figure by FIFO 1, FIFO 2 ..., FIFO m represents that m is the natural number more than or equal to 1).Above-mentioned distribution module 220, by configuration realize according to the frequency band of the intermediate-freuqncy signal of same type with the IF signal of input with one to one or the mode of one-to-many store in the FIFO storage unit.Frequency range and characteristics at the IF signal of importing, distribution module 220 can adopt the different configuration rules that sets in advance to be configured, such as adopting simple man-to-man configuration mode, in one road IF signal corresponding stored to the FIFO storage unit, if when in the IF signal of input, comprising the signal more than a frequency band, also can be in a plurality of FIFO storage unit with one road IF signal storage, different FIFO storage unit is handled signals in different frequency bands in one road IF signal.
In above-mentioned some FIFO storage unit, each FIFO storage unit all can be selected to receive data from any one IF Signal interface module independently, and selection mode is determined by the configuration rule that sets in advance in distribution module 220.The storer of mainly being made up of the FIFO storage unit is set, its objective is and to use the intermediate-freuqncy signal of being stored repeatedly.
As shown in Figure 4, above-mentioned channel set compound module 250, the some passages that comprise be divided into again some channel group (among the figure by channel group 1, channel group 2 ..., channel group r represents that r be the natural number more than or equal to 1), the quantity of passage is not necessarily equal in each channel group.Wherein each channel group, because the passage that is comprised is much higher than the input speed of signal to Signal Processing speed, like this in the passage processing procedure of signal, can adopt time-multiplexed mode, simulate a plurality of logical channels with less physical channel, from the angle of back-end processing, the actual treatment ability of base band is subjected to the restriction of logical channel number and not limited by the physical channel number, thereby has relaxed the restriction of port number to base band signal process greatly like this.
Above-mentioned channel group is the set of one group of passage, and one or more parallel physical channels are contained in a channel group inside, realize the function of a plurality of logical channels by time-multiplexed mode.Channel group can but be not limited to the signal of multi-satellite on a frequency of a satellite navigation system followed the tracks of.If processing power allows, channel group also can to comprise in the same FIFO storage unit the same frequency of different satellite navigation systems not even the data of same frequency follow the tracks of processing.
Passage in the above-mentioned channel set compound module 250 is divided into some channel group, be because receiver need be handled the signal of the different frequency of different satellite navigation systems on the one hand, the passage of handling same signal type signal can be placed in the channel group, handle the signal of same signal type in other words with the passage in the channel group, realized carrying out packet transaction convenient management according to the type of intermediate-freuqncy signal.On the other hand, the passage of same channel group the inside can multiplexing hardware resource, such as storer, hardware-accelerated arithmetic element (not shown) and hardware track loop (not shown) etc. provide greater flexibility when saving hardware resource.Need to prove, above-mentioned channel group in use, can but be not limited to handle the satellite-signal of same signal type.
Above-mentioned distribution module 240 on the basis of this distribution module 220, provides the second heavy dirigibility, adopt one to one or the mode of one-to-many with the data distribution in the storer 230 in the channel group of channel set compound module 250.In this distribution module 240, be provided with in advance and this distribution module 220 distribution rules independently mutually, the signal in the storer 230 in each FIFO storage unit can be distributed to one or more channel group by this distribution module 240 to carry out passage and handles.On the one hand, carrying out one to one under the configuring condition, can be with the frequency points of Base-Band Processing maximum number.On the other hand, not enough or in a frequency band, have under the situation of a plurality of satellite system signal channel group processing power, can adopt a plurality of channel group that the data in the FIFO storage unit are handled.
The signal of different navigation system all adopts the mode of direct sequence spread spectrum that signal is modulated.Different satellite systems, different frequencies and the different pseudo-random code that is used for spread spectrum that satellite adopted are all inequality usually, in order to increase dirigibility to a greater extent, the spreading code of each passage can produce by three sources in the channel group: on the pseudo-random code that general pseudo-noise code generator produces, the sheet or the pseudo-random code that prestores outward of sheet and the pseudo-random code of outside input.Most of pseudo-random code can produce with preset rules by the general pseudo-random code formation logic in the passage.By changing different preset rules, can produce different pseudo-random codes to adapt to different requirements.The small part pseudo-random code can not produce by general pseudo-random code formation logic, can at first be pre-stored in the inner or outside storer of channel group, reads in the process of signal Processing then.In addition, if the cycle period of pseudo-random code is long or do not have cyclicity, also can inject by the outside.As shown in Figure 4, under the situation of selecting the outside pseudo-random code of employing, can the pseudo-random code that the outside provides be offered channel group, satisfy the channel group internal channel and follow the tracks of the requirement of handling by outside pseudo-random code interface 470.The connected mode of this outside pseudo-random code interface 470 and each channel group can be to connect separately independently of one another, also can be that bus mode or other modes connect, and present embodiment connects with bus mode, but the present invention does not limit concrete connected mode.
Need to prove that the specific embodiment of the invention shown in Figure 4 is that the components and parts with each several part are distributed on the chip, in actual applications, also flexible distributed as required.Such as each the IF signaling interface in distribution module 220 and the IF Signal interface module 210 is laid on the chip, each FIFO storage unit of forming storer 230 is distributed on another chip, each channel group in distribution module 240 and the channel set compound module 250 is distributed on the 3rd chip.Perhaps, with the IF in the IF Signal interface module 210 1 and IF 2 totally two signaling interfaces be laid on the chip, all the other IF 3 to IF k are total to k-2 signaling interface to be laid on another chip, also can simultaneously each FIFO storage unit be laid in respectively on a plurality of chips or the like, these laying modes all are feasible, and the present invention does not do qualification to the laying mode of components and parts.
Fig. 5 shows the composition synoptic diagram that multisystem of the present invention merges receiver baseband signal disposal system the 3rd embodiment.In conjunction with disposal system shown in Figure 2 first embodiment and disposal system first embodiment shown in Figure 3, disposal system the 3rd embodiment shown in Figure 5 compares with disposal system first embodiment shown in Figure 2, also comprise diagnostic module 570 and automatic gain control (AGC) module 580, wherein:
Diagnostic module 570, link to each other with this IF Signal interface module 210 and distribution module 220, be used to detect the interference source of this IF Signal interface module 210, remove or reduce undesired signal that interference source produces to the influence of the intermediate-freuqncy signal of this same type etc. through the intermediate-freuqncy signal of the same type after the conversion;
Need to prove that in other embodiments, this AGC module 580 also can be optimized the power input of intermediate-freuqncy signal by the dissimilar intermediate-freuqncy signal of RF front-end module transmission is carried out power statistic.Moreover, AGC module 580 also can connect in the present embodiment other modules and realizes power statistic, such as modules such as connected storage 230 or channel set compound modules 250, carry out power statistic by the signal that intermediate steps or result produced (such as comprising dissimilar intermediate-freuqncy signals or being treated to intermediate-freuqncy signal of same type or the like) to the base band signal process process, and the gain of feedback regulation radio-frequency front-end internal amplifier, the power input of dissimilar intermediate-freuqncy signals is optimized in realization.
All the other ingredients of disposal system the 3rd embodiment shown in Figure 5 please refer to Fig. 2 or system embodiment shown in Figure 3.Need to prove, above-mentioned diagnostic module 570 also can be connected between each RF front-end module and the IF Signal interface module 210, be used to detect the interference source of this dissimilar intermediate-freuqncy signal, remove or reduce undesired signal that interference source produces to the influence of this dissimilar intermediate-freuqncy signal etc.
Need to prove, diagnostic module 570 is complementary with the IF signaling interface, when being connected with two (perhaps more a plurality of) IF signaling interfaces for a RF front end such as RF 1, the intermediate-freuqncy signal of RF 1 transmission is divided into two-way earlier, each road is inserted two IF signaling interfaces respectively respectively through behind the diagnostic module 570.That is to say that the IF signaling interface in diagnostic module 570 and the IF Signal interface module 210 is one to one.
Fig. 6 is the schematic flow sheet of satellite navigation system method for processing baseband signal embodiment of the present invention.Combination Fig. 2, Fig. 3 and system embodiment shown in Figure 5 and detailed composition synoptic diagram shown in Figure 4, this method embodiment shown in Figure 6 mainly comprises the steps:
Step S610 receives some satellite navigation systems dissimilar intermediate-freuqncy signal that radio-frequency front-end transmitted separately, and this dissimilar intermediate-freuqncy signal is changed, and obtains the intermediate-freuqncy signal of same type;
Step S620 stores the intermediate-freuqncy signal of this same type according to default allocation rule;
Step S630, the intermediate-freuqncy signal of this same type of being stored according to default distribution rules distribution; And
Step S640 follows the tracks of processing to the intermediate-freuqncy signal of this same type of described distribution.
Among the above-mentioned steps S610, receive dissimilar intermediate-freuqncy signals and carry out this conversion by some IF interfaces.
Among the above-mentioned steps S640, the signal type according to the intermediate-freuqncy signal of this same type carries out packet transaction to the intermediate-freuqncy signal of this same type.Wherein the type of IF signal is divided according to the intermediate frequency form, can be divided into symbol-amplitude coded signal, two's complement signal and offset binary coded signal; Bit number according to each sampling point is divided, and can be divided into 1 bit signal and many bit signals; Content according to input signal is divided, and can be divided into in-phase component (In-phase component is also referred to as the I branch road) one-channel signal and in-phase component and quadrature component (Quadrature component is also referred to as the Q branch road) two paths of signals.
Above-mentioned steps S640, the source of spreading code comprises when follow the tracks of handling, on the pseudo-random code that general pseudo-noise code generator produces, the sheet or the pseudo-random code that prestores outward of sheet or the pseudo-random code of outside input.
Among the method embodiment shown in Figure 6, can also come the gain of feedback regulation radio-frequency front-end internal amplifier by power statistic, to optimize the power input of this dissimilar intermediate-freuqncy signal.
Base-band Processing System of the present invention and method, can carry out fusion treatment to multiple satellite navigation system signals, circuit scale is little, the equivalence port number is many, makes receiver to have reached the high processing ability under the situation of using less resource, satisfy compatibility to existing each satellite navigation system, but also have the demand that following expansion is satisfied in enough big dirigibility, and do not need receiver all to set up the complete disposal system of a cover at each navigational system, saved cost.In addition, system and method for the present invention adopts the mode of search engine that a large amount of correlators is provided, and has improved catching and tracking velocity of receiver.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any those skilled in the art are in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (18)
1. a satellite navigation system baseband signal processing system is characterized in that, comprising:
The intermediate-freuqncy signal interface module links to each other with the radio-frequency front-end of some satellite navigation systems, is used to receive dissimilar intermediate-freuqncy signals and change, and obtains the intermediate-freuqncy signal of same type;
Distribution module links to each other with described intermediate-freuqncy signal interface module, is used for storing according to default allocation rule the intermediate-freuqncy signal of described same type;
Storer links to each other with described distribution module, is used to store the intermediate-freuqncy signal of described same type;
Distribution module links to each other with described storer, is used for distributing according to default distribution rules the intermediate-freuqncy signal of described same type; And
The channel set compound module links to each other with described distribution module, includes some passages, is used for the intermediate-freuqncy signal of the described same type of described distribution module distribution is followed the tracks of processing.
2. the system as claimed in claim 1 is characterized in that:
The radio-frequency front-end of some satellite navigation systems comprises and adopts the radio frequency integrated circuit that discrete component is realized, multi-disc standard radio frequency integrated circuit is realized or a slice is integrated to realize.
3. the system as claimed in claim 1 is characterized in that:
Described storer is used for storing according to frequency band the intermediate-freuqncy signal of described same type.
4. the system as claimed in claim 1 is characterized in that, this system further comprises:
Search engine, link to each other with described distribution module, comprise main by at least a equivalent correlator that constitutes in correlator, matched filter and the Fast Fourier Transform (FFT) unit, and with the supporting signal capture logic of described equivalent correlator, auxiliary described channel set compound module carries out described tracking to described intermediate-freuqncy signal to be handled.
5. the system as claimed in claim 1 is characterized in that:
Described intermediate-freuqncy signal interface module includes some intermediate-freuqncy signal interfaces, and each intermediate-freuqncy signal interface receives dissimilar intermediate-freuqncy signals.
6. the system as claimed in claim 1 is characterized in that:
Described storer includes some first-in first-out storage unit;
Described distribution module stores the intermediate-freuqncy signal of described same type in the described first-in first-out storage unit into.
7. system as claimed in claim 6 is characterized in that:
Described channel set compound module, the some passages that comprise are divided into some channel group, and each channel group contains one or more parallel physical channel, and described some channel group are handled described intermediate-freuqncy signal according to signal type;
Described distribution module is distributed to one or more than one described channel group with the intermediate-freuqncy signal of the same type in the described first-in first-out storage unit.
8. the system as claimed in claim 1 is characterized in that, this system further comprises:
Outside pseudo-random code interface links to each other with described channel set compound module, is used for outside pseudo-random code is offered described some passages.
9. the system as claimed in claim 1 is characterized in that, this system further comprises:
Diagnostic module, link to each other with described intermediate-freuqncy signal interface module, be used to detect the interference source of the intermediate-freuqncy signal of described dissimilar or same type, remove or reduce the influence of undesired signal that described interference source produces the intermediate-freuqncy signal of described dissimilar or same type.
10. the system as claimed in claim 1 is characterized in that, this system further comprises:
The automatic gain control module is used for the gain by the described radio-frequency front-end internal amplifier of power statistic feedback regulation, optimizes the power input of described dissimilar intermediate-freuqncy signal.
11. the system as claimed in claim 1 is characterized in that:
Described radio-frequency front-end receives the radiofrequency signal of described some satellite navigation systems by the antenna more than one or.
12. a satellite navigation system method for processing baseband signal is characterized in that, comprising:
Receive some satellite navigation systems radio-frequency front-end transmission dissimilar intermediate-freuqncy signals and change, obtain the intermediate-freuqncy signal of same type;
Store the intermediate-freuqncy signal of described same type according to default allocation rule;
The intermediate-freuqncy signal of distributing the described same type of storage according to default distribution rules; And
Intermediate-freuqncy signal to the described same type of described distribution is followed the tracks of processing.
13. method as claimed in claim 12 is characterized in that:
Receive described dissimilar intermediate-freuqncy signal respectively according to type.
14. method as claimed in claim 12 is characterized in that:
When described tracking is handled, the intermediate-freuqncy signal of described same type is carried out packet transaction according to signal type.
15. method as claimed in claim 12 is characterized in that:
The source of spreading code comprised when described tracking was handled, the pseudo-random code of the pseudo-random code that general pseudo-noise code generator produces, the pseudo-random code that prestores or outside input.
16. method as claimed in claim 12 is characterized in that, this method further comprises:
Detect the interference source of the intermediate-freuqncy signal of described dissimilar or same type, remove or reduce the influence of undesired signal that described interference source produces the intermediate-freuqncy signal of described dissimilar or same type.
17. method as claimed in claim 12 is characterized in that, this method further comprises:
By the gain of the described radio-frequency front-end internal amplifier of power statistic feedback regulation, optimize the power input of described dissimilar intermediate-freuqncy signal.
18. method as claimed in claim 12 is characterized in that:
Described radio-frequency front-end receives the radiofrequency signal of described some satellite navigation systems by the antenna more than one or.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100903394A CN101702016B (en) | 2009-08-05 | 2009-08-05 | Satellite navigation system baseband signal processing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100903394A CN101702016B (en) | 2009-08-05 | 2009-08-05 | Satellite navigation system baseband signal processing system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101702016A true CN101702016A (en) | 2010-05-05 |
| CN101702016B CN101702016B (en) | 2012-03-14 |
Family
ID=42156936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100903394A Active CN101702016B (en) | 2009-08-05 | 2009-08-05 | Satellite navigation system baseband signal processing system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101702016B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540219A (en) * | 2010-12-31 | 2012-07-04 | 和芯星通科技(北京)有限公司 | Receiving method and receiver for signal of global navigation satellite system |
| CN104852759A (en) * | 2014-02-13 | 2015-08-19 | 北京信威通信技术股份有限公司 | Digital beam-forming signal processing device and method thereof |
| CN104917560A (en) * | 2015-05-12 | 2015-09-16 | 北京九天利建信息技术有限公司 | Beidou communication satellite multi-beam and multi-user receiving monitoring device and method |
| CN105137460A (en) * | 2015-08-27 | 2015-12-09 | 武汉梦芯科技有限公司 | Satellite navigation system baseband signal processing system and method |
| CN105445768A (en) * | 2015-12-10 | 2016-03-30 | 哈尔滨工程大学 | Beidou navigation receiving device based on SCA and signal processing method thereof |
| CN109495158A (en) * | 2018-11-21 | 2019-03-19 | 广州海格通信集团股份有限公司 | A kind of system and method improving satellite communication rate |
| CN109781841A (en) * | 2017-11-10 | 2019-05-21 | 国核电站运行服务技术有限公司 | Primary/secondary channel ultrasonic detection system and electronic equipment |
| CN113568016A (en) * | 2021-07-20 | 2021-10-29 | 中交信捷科技有限公司 | Multi-mode GNSS signal correlation method and system based on FPGA |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002363A (en) * | 1996-03-08 | 1999-12-14 | Snaptrack, Inc. | Combined GPS positioning system and communications system utilizing shared circuitry |
| CN101033974B (en) * | 2007-01-19 | 2010-05-19 | 北京东方联星科技有限公司 | Navigation satellite signal generating system based on software |
-
2009
- 2009-08-05 CN CN2009100903394A patent/CN101702016B/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540219A (en) * | 2010-12-31 | 2012-07-04 | 和芯星通科技(北京)有限公司 | Receiving method and receiver for signal of global navigation satellite system |
| CN104852759A (en) * | 2014-02-13 | 2015-08-19 | 北京信威通信技术股份有限公司 | Digital beam-forming signal processing device and method thereof |
| CN104852759B (en) * | 2014-02-13 | 2019-04-05 | 北京信威通信技术股份有限公司 | Digital beam-forming signal processing apparatus and method |
| CN104917560A (en) * | 2015-05-12 | 2015-09-16 | 北京九天利建信息技术有限公司 | Beidou communication satellite multi-beam and multi-user receiving monitoring device and method |
| CN104917560B (en) * | 2015-05-12 | 2018-06-05 | 北京九天利建信息技术股份有限公司 | Beidou communication satellite multi-beam multi-user supervises receiving apparatus and method |
| CN105137460A (en) * | 2015-08-27 | 2015-12-09 | 武汉梦芯科技有限公司 | Satellite navigation system baseband signal processing system and method |
| CN105445768A (en) * | 2015-12-10 | 2016-03-30 | 哈尔滨工程大学 | Beidou navigation receiving device based on SCA and signal processing method thereof |
| CN109781841A (en) * | 2017-11-10 | 2019-05-21 | 国核电站运行服务技术有限公司 | Primary/secondary channel ultrasonic detection system and electronic equipment |
| CN109781841B (en) * | 2017-11-10 | 2021-09-17 | 国核电站运行服务技术有限公司 | Main/auxiliary channel ultrasonic detection system and electronic equipment |
| CN109495158A (en) * | 2018-11-21 | 2019-03-19 | 广州海格通信集团股份有限公司 | A kind of system and method improving satellite communication rate |
| CN109495158B (en) * | 2018-11-21 | 2021-12-10 | 广州海格通信集团股份有限公司 | System and method for improving satellite communication rate |
| CN113568016A (en) * | 2021-07-20 | 2021-10-29 | 中交信捷科技有限公司 | Multi-mode GNSS signal correlation method and system based on FPGA |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101702016B (en) | 2012-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101702016B (en) | Satellite navigation system baseband signal processing system and method | |
| AU689867B2 (en) | Receiver having for charge-coupled-device based receiver signal processing | |
| US7885363B2 (en) | Correlation device and method for different modulated signals | |
| CN103760575A (en) | Anti-interference Beidou satellite navigation receiver board card and receiver terminal thereof | |
| CN102176037B (en) | Co-frequency multi-system navigation signal receiving and processing method | |
| US6778135B2 (en) | GPS Receiver | |
| CN105137460A (en) | Satellite navigation system baseband signal processing system and method | |
| JP2009520968A (en) | Performing correlation in receiving spread spectrum signals | |
| CN104459735B (en) | The high-precision difference service of Big Dipper satellite-based receives device | |
| CN103728634A (en) | Double-antenna A-GNSS receiving machine system | |
| CN102346253B (en) | Hybrid satellite positioning receiver | |
| CN101487886B (en) | Method for implementing satellite navigation positioning by different navigation frequency band | |
| CN101310192A (en) | Sample sequence processing signals | |
| KR20070011386A (en) | Positioning receiver | |
| CN101213471B (en) | System and method for providing optimized receiver architectures for combined pilot and data signal tracking | |
| CN102540218A (en) | Correlator for global positioning satellite navigation signal | |
| US9612339B2 (en) | Detecting satellite signals by storing signal sets spanning code period | |
| CN102508269A (en) | Satellite navigation pilot signal acquisition method, pseudo random sequence stripping method and device | |
| CN105393140B (en) | Repelled by the receiver aliasing of addition offset and is improved | |
| CN101150350B (en) | A method and device for digitalizing radio satellite signals under mixed mode | |
| CN101867542A (en) | Intermediate frequency processing engine, intermediate frequency carrier removing method and gnss receiver | |
| KR100866075B1 (en) | Reception of a spread spectrum modulated signal | |
| CN102207550A (en) | Capture engine structure of GPS/Galileo dual-mode receiver | |
| CN212540723U (en) | Wireless filling system for underwater Beidou navigation ephemeris and almanac | |
| CN101447822B (en) | A method for receiving a first signal channel and a second signal channel from a satellite and receiver thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |