CN106405585A - Radiofrequency signal acquisition playback method and radiofrequency signal acquisition playback device - Google Patents
Radiofrequency signal acquisition playback method and radiofrequency signal acquisition playback device Download PDFInfo
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- CN106405585A CN106405585A CN201610757776.7A CN201610757776A CN106405585A CN 106405585 A CN106405585 A CN 106405585A CN 201610757776 A CN201610757776 A CN 201610757776A CN 106405585 A CN106405585 A CN 106405585A
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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
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
-
- 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
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
Abstract
The invention provides a radiofrequency signal acquisition playback method and a radiofrequency signal acquisition playback device and relates to the radiofrequency technology field. The method comprises steps that a radiofrequency signal emitted by a navigation satellite is received by a reception antenna, the radiofrequency signal is processed through first channel processing equipment to acquire a first simulation intermediate frequency signal, AD transformation of the first simulation intermediate frequency signal is carried out through analog-to-digital conversion equipment to acquire an intermediate frequency digital signal, the intermediate frequency digital signal is acquired through an FPGA, and the acquired intermediate frequency digital signal is stored in a storage device; when playback is required, the intermediate frequency digital signal is read through the FPGA from the storage device, DA transformation is carried out to acquire a second simulation intermediate frequency signal, and the second simulation intermediate frequency signal is processed through second channel processing equipment to acquire an output signal. The method is advantaged in that actual satellite signal test requirements of people in the indoor environment for the positioning navigation equipment are satisfied.
Description
Technical field
The present invention relates to radio frequency arts, more particularly, to a kind of RF signal collection back method and device.
Background technology
With navigation system build up and location and navigation technology fast development, the positioning to positioning navigating device for the people
The requirement more and more higher of precision and location availability.In order to meet scientific research and test needs, navigation signal simulator arises at the historic moment.
Navigation signal simulator to some extent solves navigation correlation technique development problem and navigator is produced in test
Some practical problems.
But, emulation signal can be produced during application navigation simulator, there is sizable difference and actual signal between.Example
As, in the preventing test of navigator, actual road conditions may be considerably complicated, and navigation simulator can not possibly make similar field
Scape.Therefore, when carrying out anti-multipath and Anti-Jamming Technique tackling key problem it is difficult to be constructed very really many using navigation simulator
Footpath environment and compacting interference environment.
In view of the foregoing, more accurately way is at present, and actual navigation satellite signal is recorded, and is needing
Shi Jinhang playback process.But, navigation satellite signal playback apparatus major part on the market is digital intermediate frequency playback, is only applicable to
Professional research staff carries out the capture of aeronautical satellite digital intermediate frequency signal, the research followed the tracks of in experiment interior, and existing radio frequency
Playback apparatus volume is big, power consumption is high, form fixation is unfavorable for extension and in general occasion, radiofrequency signal is played back it is difficult to meet people
The requirement processing.
Content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of RF signal collection back method and device, leads to
Cross and a series of conversion are carried out to radiofrequency signal, improve the verity that positioning navigating device is tested and development environment uses and facility
Property.
In a first aspect, embodiments providing a kind of RF signal collection back method, including：Reception antenna receives
The radiofrequency signal of aeronautical satellite transmitting；
First channel processing equipment is processed to radiofrequency signal, obtains the first analog if signal；
Analog digital conversion equipment carries out AD conversion to the first analog if signal, obtains digital intermediate frequency signal；
FPGA gathers digital intermediate frequency signal, and it is stored in memory；When needing playback, FPGA is from storage
Read digital intermediate frequency signal in device, and carry out DA conversion, obtain the second analog if signal；
Second channel processing equipment obtains output signal after the second analog if signal is processed.
In conjunction with a first aspect, embodiments providing the first possible embodiment of first aspect, wherein,
One channel processing equipment is processed to radiofrequency signal, obtains the first analog if signal and comprises the following steps：
First power splitter carries out two work(to radiofrequency signal and divides, and obtains first via radiofrequency signal and the second tunnel radiofrequency signal, right
First via radiofrequency signal carries out four work(and gets multi-channel rf signal；
SAW filter carries out sound table filtering to the first via and multi-channel rf signal；
Filtered for the sound table first via and multi-channel rf signal are all downconverted to intermediate frequency by down-converted device, obtain first
Road and multichannel intermediate-freuqncy signal；
The first via and multichannel intermediate-freuqncy signal are combined by combiner, obtain the first combining intermediate-freuqncy signal, and first is closed
Road intermediate-freuqncy signal passes through if bandpas filter, obtains the first analog if signal.
In conjunction with a first aspect, the possible embodiment of the second that embodiments provides first aspect, wherein,
Two data handling equipment obtain output signal after the second analog if signal is processed and comprise the following steps：
Second power splitter carries out work(office reason to the second analog if signal, obtains multi-channel analog intermediate-freuqncy signal；
Upconversion process device carries out upconversion process according to local oscillator to multi-channel analog intermediate-freuqncy signal, obtains multichannel up-conversion letter
Number；
Band filter, carries out bandpass filtering to multichannel up-conversion signal, and filtered multichannel up-conversion signal is entered
Row combining, obtains the second combining up-conversion signal；
3rd power splitter carries out two work(to the second combining up-conversion signal and divides, and obtains first via up-conversion signal and the second tunnel
Up-conversion signal, first via up-conversion signal directly exports.
In conjunction with the possible embodiment of the second of first aspect, embodiments provide first aspect the third
Possible embodiment, wherein, second channel processing equipment obtains output signal after the second analog if signal is processed
Further comprising the steps of：
Second road up-conversion signal is sent to reference receiver, to be tested.
In conjunction with the third possible embodiment of first aspect, embodiments provide the 4th kind of first aspect
Possible embodiment, wherein, method also includes：
When the radiofrequency signal that aeronautical satellite is launched is received by array received antenna, introduce same external clock, by battle array
The radiofrequency signal of row reception antenna synchronizes collection playback.
Second aspect, embodiments provides a kind of RF signal collection playback reproducer, including：Rf signal reception
Module, for receiving the radiofrequency signal of aeronautical satellite transmitting；
First channel processing module, for processing to radiofrequency signal, obtains the first analog if signal；
Analog-to-digital conversion module, for carrying out AD conversion to the first analog if signal, obtains digital intermediate frequency signal；
FPGA processing module, for gathering digital intermediate frequency signal, and it is stored in memory；When need play back
When, FPGA reads digital intermediate frequency signal from memorizer, and carries out DA conversion, obtains the second analog if signal；
Second channel processing module, obtains output signal for after processing to the second analog if signal.
In conjunction with second aspect, embodiments provide the first possible embodiment of second aspect, wherein, the
One channel processing module includes：
First work(divides processing unit, divides for carrying out two work(to radiofrequency signal, obtains first via radiofrequency signal and the second tunnel
Radiofrequency signal, carries out four work(to first via radiofrequency signal and gets multi-channel rf signal；
Filter unit, for carrying out sound table filtering to the first via and multi-channel rf signal；
Frequency conversion processing unit, for all the filtered first via and multi-channel rf signal are downconverted to intermediate frequency, obtains
The first via and multichannel intermediate-freuqncy signal；
Combining processing unit, for being combined the first via and multichannel intermediate-freuqncy signal, obtains the first combining intermediate-freuqncy signal,
And the first combining intermediate-freuqncy signal is passed through if bandpas filter, obtain the first analog if signal.
In conjunction with second aspect, embodiments provide the possible embodiment of the second of second aspect, wherein, the
Two data processing modules include：
Second work(divides processing unit, for carrying out work(office reason to the second analog if signal, obtains multi-channel analog intermediate frequency
Signal；
Upconversion process unit, for carrying out upconversion process according to local oscillator to multi-channel analog intermediate-freuqncy signal, obtains multichannel
Up-conversion signal；
Bandpass filtering unit, for carrying out bandpass filtering to multichannel up-conversion signal, and by filtered multichannel up-conversion
Signal is combined, and obtains the second combining up-conversion signal；
3rd work(divides processing unit, divides for carrying out two work(to the second combining up-conversion signal, obtains first via up-conversion
Signal and the second road up-conversion signal, first via up-conversion signal directly exports.
In conjunction with the possible embodiment of the second of second aspect, embodiments provide second aspect the third
Possible embodiment, wherein, second channel processing module also includes：
Test module, for the second road up-conversion signal is sent to reference receiver, to be tested.
In conjunction with the third possible embodiment of second aspect, embodiments provide the 4th kind of second aspect
Possible embodiment, wherein, also includes：
Synchronised clock module, for when receiving the radiofrequency signal of aeronautical satellite transmitting by array received antenna, introducing
Same external clock, the radiofrequency signal of array received antenna is synchronized collection playback.
A kind of RF signal collection back method provided in an embodiment of the present invention and device, wherein the method includes：Receive
Antenna receives the radiofrequency signal of aeronautical satellite transmitting, and the first channel processing equipment is processed to radiofrequency signal, obtains the first mould
Intend intermediate-freuqncy signal, analog digital conversion equipment carries out AD conversion to the first analog if signal, obtain digital intermediate frequency signal, FPGA gathers
Digital intermediate frequency signal, and it is stored in memory, when needing playback, FPGA reads intermediate frequency digital from memorizer
Signal, and carry out DA conversion, obtain the second analog if signal, second channel processing equipment is carried out to the second analog if signal
Output signal is obtained after process.By the above-mentioned conversion that radiofrequency signal is carried out, improve positioning navigating device test and research and develop
The verity of environment and convenience.
For enabling the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to use required in embodiment
Figure is briefly described it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
The flow chart that Fig. 1 shows a kind of RF signal collection back method that the embodiment of the present invention is provided；
Fig. 2 shows a kind of structural framing figure of RF signal collection playback reproducer that the embodiment of the present invention is provided；
What Fig. 3 showed a kind of RF signal collection playback reproducer that the embodiment of the present invention is provided realizes block diagram；
Fig. 4 shows that the clock of a kind of RF signal collection playback reproducer that the embodiment of the present invention provided and work(branch divide
Functional block diagram；
Fig. 5 shows a kind of function of the filtering part of RF signal collection playback reproducer that the embodiment of the present invention is provided
Block diagram；
Fig. 6 shows a kind of work(of the down coversion part of RF signal collection playback reproducer that the embodiment of the present invention is provided
Can block diagram；
Fig. 7 shows a kind of the first combining intermediate frequency letter of RF signal collection playback reproducer that the embodiment of the present invention is provided
Number combining and the functional block diagram of filtering part；
Fig. 8 shows that a kind of digital intermediate frequency signal of RF signal collection playback reproducer that the embodiment of the present invention is provided is adopted
Collection and the functional block diagram of playback and DA conversion section；
Fig. 9 show a kind of work(of RF signal collection playback reproducer that the embodiment of the present invention is provided divide, up-conversion and
Up-conversion post filtering and the functional block diagram of combining part；
Figure 10 shows a kind of the second combining part of RF signal collection playback reproducer that the embodiment of the present invention is provided
Functional block diagram；
Figure 11 shows the functional block of the radiofrequency signal that 4 collection playback reproducer synchronous acquisition array received antennas receive
Figure.
Specific embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Generally exist
The assembly of the embodiment of the present invention described and illustrated in accompanying drawing can be arranged with various different configurations and design herein.Cause
This, be not intended to limit claimed invention to the detailed description of the embodiments of the invention providing in the accompanying drawings below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment being obtained on the premise of going out creative work, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation of instruction such as " level ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the simplification description of the present invention, rather than instruction or the hint equipment of indication or assembly must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or hint relative importance.Wherein, term " primary importance " and
" second position " is two different positions.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two component internal.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Frequency, bandwidth and modulation system that four current large satellite navigation system are comprised are as shown in table 1.
Table 1 satellite navigation system signals system
As shown in table 1, the signal system of satellite navigation system is various, and, the frequency of different satellite navigation system, frequency
Also differ etc. feature.Therefore, in actual applications, navigation signal simulator is difficult to use emulating the field that signal mode draws up reality
Scape.For this reason, the invention provides a kind of RF signal collection playback method and apparatus, as depicted in figs. 1 and 2, to gather back
Put multimode multi-frequency navigation satellite signal, and the collection of the signals such as AM, FM, radio and television, satellite communication can be extended to and playback should
With by the conversion of radiofrequency signal and process, to improve the positioning precision of navigator.
Embodiment one
Satellite-signal as Fig. 3 describes reception antenna reception is divided into 5 tunnels through the first power splitter work(, is then passed through corresponding
SAW filter, carry out sound table filtering, and carry out down coversion changing to intermediate frequency, obtain the first via and multichannel intermediate-freuqncy signal, combining
The first via and multichannel intermediate-freuqncy signal are combined by device, obtain the first combining intermediate-freuqncy signal, and the first combining intermediate-freuqncy signal is led to
Cross if bandpas filter, obtain the first analog if signal.
AD sampling is carried out to the first analog if signal and binary code stream deposits process.Through FPGA from memorizer during playback
Read binary code stream in part and carry out DA conversion, obtain the second analog if signal, the second power splitter is believed to the second analog intermediate frequency
Number carry out work(office reason, obtain multi-channel analog intermediate-freuqncy signal, upconversion process device enters to multi-channel analog intermediate-freuqncy signal according to local oscillator
Row upconversion process, obtains multichannel up-conversion signal, and band filter carries out bandpass filtering to multichannel up-conversion signal, and will carry
Multichannel up-conversion signal after pass filter is combined, and obtains the second combining up-conversion signal, the 3rd power splitter is to the second combining
Up-conversion signal carries out two work(and divides, and obtains first via up-conversion signal and the second road up-conversion signal, first via up-conversion signal
Directly export, the second road up-conversion signal is sent to reference receiver, to be tested.
As described in Fig. 4, coaxial head J1 connects full range point navigation satellite signal reception antenna, receives after signal through one
After dividing two power splitter S1, work(is divided into two-way, and wherein one tunnel is divided into 4 tunnels through one point of four power splitter work(again.So far, connect by reception antenna
The signal received is divided into into 5 tunnels.Whole device acquiescence can connect external reference clock using internal 10M reference clock, coaxial head J2
Input, when multiple stage collection playback reproducer needs synchronous use, carrys out synchronous each table apparatus using external reference clock.The each device of rear class
Reference clock is output after clock driving for the 10M Reference clock.
As described in Fig. 5, it is leading of B3 frequency that two work(divide the output filtered device F1 filtered output F1_out of S1
Boat signal.Four work(divide S2 work(to export respectively after dividing to four wave filter, filtered device F2 filtered output F2_out be B1 and
The navigation signal of L1 frequency, filtered device F3 filtered output F3_out is the navigation signal of GALILEO E1 frequency, through filter
Ripple device F4 filtered output F4_out is the navigation signal of BD2B2 frequency and GALILEO E5a frequency, filtered device F5 filtering
Output F5_out afterwards is the navigation signal of GLONASS R1 frequency.Each SAW filter canonical parameter is shown in Table 2.
Table 2 SAW filter canonical parameter
As described in Fig. 6, unification after the filtered signal in 5 tunnels is downconverted changes to identical intermediate frequency, in the present embodiment,
Intermediate frequency is set to 40M.It is embodied as follows：
The first via, filtered F1_out is B3 frequency signal, and frequency is 1268.52MHz, and local oscillator is 1268.52-40=
1228.52MHz, FPGA produce local oscillator LO_1, F1_ by the frequency synthesizer ADF4360-5 with VCO that Spi_1 configures ADI
It is 40MHz that out and LO_1 produces mid frequency after frequency mixer m1 mixing, with the IF output signal of a width of 20.46MHz
m1_out.
Second tunnel, filtered F2_out is BD2B1 frequency and GPS L1 frequency signal, and mid frequency is 1568MHz, this
Shake for 1568-40=1528MHz, the generation local oscillator of the frequency synthesizer ADF4360-4 with VCO by Spi_2 configuration ADI for the FPGA
It is 40MHz that LO_2, F2_out and LO_2 produce mid frequency after frequency mixer m2 mixing, with the intermediate frequency of a width of 18.322MHz
Output signal m2_out.
3rd tunnel, filtered F3_out is GALILEO E1 frequency signal, and mid frequency is 1575MHz, and local oscillator is
1575-40=1535MHz, FPGA produce local oscillator LO_ by the frequency synthesizer ADF4360-4 with VCO that Spi_3 configures ADI
3, F3_out and LO_3 produce mid frequency for 40MHz, with the IF output signal of a width of 20MHz after frequency mixer m3 mixing
m3_out.
4th tunnel, filtered F4_out is BD2B2 frequency and GALILEO E5b frequency signal, and mid frequency is
1207MHz, local oscillator is 1207-40=1167MHz, and FPGA configures the frequency synthesizer with VCO of ADI by Spi_4
ADF4360-4 produces local oscillator LO_4, and it is 40MHz that F4_out and LO_4 produces mid frequency after frequency mixer m4 mixing, bandwidth
IF output signal m4_out for 20MHz.
5th tunnel, filtered F5_out is GLONASS R1 frequency signal, and mid frequency is 1602MHz, and local oscillator is
1602-40=1562MHz, FPGA produce local oscillator LO_ by the frequency synthesizer ADF4360-4 with VCO that Spi_5 configures ADI
5, F5_out and LO_5 produce mid frequency for 40MHz, with the IF output signal of a width of 18MHz after frequency mixer m5 mixing
m5_out.
As described in Fig. 7,5 tunnels mixing after output m1_out, m2_out, m3_out, m4_out and m5_out in
Frequency is combined, and the mid frequency of the signal c1 after combining is 40MHz, with the maximum bandwidth of a width of mixing Hou Ge road signal
20.46MHz.The use of mid frequency is 40MHz, the intermediate-frequency filter F6 with a width of 25MHz filters to the signal c1 after combining
Ripple, filtering is output as F6_out.
As described in Fig. 8, the analog if signal F6_out of output after prime filtering, become intermediate frequency after AD conversion
Digital signal D1, FPGA first latch the digital signal D1 after AD conversion when carrying out signals collecting, then carry out parallel-serial conversion, so
After receiving acquisition instructions, binary number is deposited toward in the storage medium such as solid state hard disc or flash array according to self-defined frame structure afterwards
According to stream.When receiving play-back command, FPGA is read with self-defined frame structure from the storage medium such as solid state hard disc or flash array
Binary data stream, then carries out serioparallel exchange, then carries out DA and is converted into analog intermediate frequency.
As described in Fig. 9, analog intermediate frequency work(Fen Houge road signal is carried out with local oscillator during corresponding down coversion respectively
Mixing, obtains the radiofrequency signal after up-conversion, is then passed through corresponding Filtering Processing.It is embodied as follows：
The first via, the output S3_out of power splitter S3 is mixed with local oscillator LO_1, and the signal m6_out after up-conversion is through sound
After table wave filter F7, the frequency of the signal F7_out of output is 40+1228.52=1268.52MHz, carries a width of 20MHz, corresponding
The signal of BD2B3 frequency.
Second tunnel, the output S3_out of power splitter S3 is mixed with local oscillator LO_2, and the signal m7_out after up-conversion is through sound
After table wave filter F8, the frequency of the signal F8_out of output is 40+1528=1568MHz, carries a width of 18.322MHz, covers BD
B1 frequency and the signal of GPS L1 frequency.
3rd tunnel, the output S3_out of power splitter S3 is mixed with local oscillator LO_3, and the signal m8_out after up-conversion is through sound
After table wave filter F9, the frequency of the signal F9_out of output is 40+1535=1575MHz, carries a width of 20MHz, substantially covers
The main lobe of GALILEO E1 frequency signal.
4th tunnel, the output S3_out of power splitter S3 is mixed with local oscillator LO_4, and the signal m9_out after up-conversion is through sound
After table wave filter F10, the frequency of the signal F10_out of output is 40+1167=1207MHz, carries a width of 20MHz, covers
GALILEO E5b frequency and the signal of BD2 B2 frequency.
5th tunnel, the output S3_out of power splitter S3 is mixed with local oscillator LO_5, and the signal m10_out after up-conversion is through sound
After table wave filter F11, the frequency of the signal F11_out of output is 40+1562=1602MHz, carries a width of 18MHz, covers
The signal of GLONASS R1 frequency.
As described in Figure 10, up-conversion filtered signal F7_out, F8_out, F9_out, F10_out and F11_
Out is combined the signal RF_OUT_1 processing after generating combining, is then passed through two work(and divides S4, wherein one road signal RF_OUT is straight
Connect the radiofrequency signal as final playback, another road exports to the built-in reference receiver UBLOX LEA-6S of this invention device,
Verify function and the performance of collection playback reproducer for closed loop.
A kind of RF signal collection back method and device that the present embodiment provides, the having the technical effect that of this embodiment：When
After reception antenna receives the radiofrequency signal of aeronautical satellite transmitting, radiofrequency signal is processed, and AD conversion, obtain middle frequency
Word signal, FPGA gathers digital intermediate frequency signal, and it is stored in memory；When needing playback, FPGA is from storage
Read digital intermediate frequency signal in device, and carry out DA conversion, finally obtain after the second analog if signal is processed and exported
Signal.By with up conversion, improve the positioning precision of positioning navigating device.And, extensibility is strong, and local frequency can be joined
Put, just can easily realize as long as need to changing and changing wave filter during application demand, compare current scheme, cost of implementation is low, work(
Consume low, small volume.Intermediate frequency configures to same frequency and bandwidth, and combining stores, significantly can save memory space, be obviously improved device
Signal storage duration, built-in reference receiver, can the function of closed loop test whole device and performance.
Embodiment two
Need many table apparatus synchronous acquisition and playback in the occasion of the collection of many radio frequency sources and playback, using outer in the present embodiment
Portion's clock source is as the reference clock of whole device.As described in Figure 11, it is 4 collection playback reproducer synchronous acquisition four array elements
The navigation satellite signal that anti-interference reception antenna receives, can be used for Anti-interference algorithm research and the test of anti-interference equipment, needs
It should be noted that the research staff of the art is when carrying out many radio frequency source collection playback, basis is needed to actually enter radio frequency letter
Number power level the gain of whole link is adjusted correspondingly.
A kind of RF signal collection back method and device that the present embodiment provides, the having the technical effect that of this embodiment：Dry
Disturb using this device of multiple stage under environment, and ensure many table apparatus homology using the external clock input port input clock of this device,
Many array element signals synchronous acquisition playback under achievable interference environment, is applied to research and development and the performance inspection of the anti-interference product of array
Survey.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.
Claims (10)
1. a kind of RF signal collection back method it is characterised in that, including：
Reception antenna receives the radiofrequency signal of aeronautical satellite transmitting；
First channel processing equipment is processed to described radiofrequency signal, obtains the first analog if signal；
Analog digital conversion equipment carries out AD conversion to described first analog if signal, obtains digital intermediate frequency signal；
FPGA gathers described digital intermediate frequency signal, and it is stored in memory, and when needing playback, FPGA is from storage
Read described digital intermediate frequency signal in device, and carry out DA conversion, obtain the second analog if signal；
Second channel processing equipment obtains output signal after described second analog if signal is processed.
2. a kind of RF signal collection back method according to claim 1 is it is characterised in that described first Channel Processing
Equipment is processed to described radiofrequency signal, obtains the first analog if signal and comprises the following steps：
First power splitter carries out two work(to described radiofrequency signal and divides, and obtains first via radiofrequency signal and the second tunnel radiofrequency signal, right
Described first via radiofrequency signal carries out four work(and gets multi-channel rf signal；
SAW filter carries out sound table filtering to described first via radiofrequency signal and described multi-channel rf signal；
Filtered for sound table described first via radiofrequency signal and described multi-channel rf signal are all downconverted to by down-converted device
Intermediate frequency, obtains the first via and multichannel intermediate-freuqncy signal；
The described first via and described multichannel intermediate-freuqncy signal are combined by combiner, obtain the first combining intermediate-freuqncy signal, and by institute
State the first combining intermediate-freuqncy signal and pass through if bandpas filter, obtain described first analog if signal.
3. a kind of RF signal collection back method according to claim 1 and device are it is characterised in that described second believes
Road processing equipment obtains output signal after described second analog if signal is processed and comprises the following steps：
Second power splitter carries out work(office reason to described second analog if signal, obtains multi-channel analog intermediate-freuqncy signal；
Upconversion process device carries out upconversion process according to described local oscillator to described multi-channel analog intermediate-freuqncy signal, obtains becoming in multichannel
Frequency signal；
Band filter, carries out bandpass filtering to described multichannel up-conversion signal, and filtered described multichannel up-conversion is believed
Number it is combined, obtain the second combining up-conversion signal；
3rd power splitter carries out two work(to described second combining up-conversion signal and divides, and obtains first via up-conversion signal and the second tunnel
Up-conversion signal, described first via up-conversion signal directly exports.
4. a kind of RF signal collection back method according to claim 3 is it is characterised in that described second channel is processed
It is further comprising the steps of that equipment obtains output signal after described second analog if signal is processed：
Described second road up-conversion signal is sent to reference receiver, to be tested.
5. a kind of RF signal collection back method according to claim 4 is it is characterised in that methods described also includes：
When the radiofrequency signal that aeronautical satellite is launched is received by array received antenna, introduce same external clock, array is connect
The radiofrequency signal receiving antenna synchronizes collection playback.
6. a kind of RF signal collection playback reproducer is it is characterised in that include：
Rf signal reception module, for receiving the radiofrequency signal of aeronautical satellite transmitting；
First channel processing module, for processing to described radiofrequency signal, obtains the first analog if signal；
Analog-to-digital conversion module, for carrying out AD conversion to described first analog if signal, obtains digital intermediate frequency signal；
FPGA processing module, for gathering described digital intermediate frequency signal, and it is stored in memory；When need play back
When, FPGA reads described digital intermediate frequency signal from memorizer, and carries out DA conversion, obtains the second analog if signal；
Second channel processing module, obtains output signal for after processing to described second analog if signal.
7. a kind of RF signal collection playback reproducer according to claim 6 is it is characterised in that described first Channel Processing
Module includes：
First work(divides processing unit, divides for carrying out two work(to described radiofrequency signal, obtains first via radiofrequency signal and the second tunnel
Radiofrequency signal, carries out four work(to described first via radiofrequency signal and gets multi-channel rf signal；
Sound table filter unit, for carrying out sound table filtering to the described first via and described multi-channel rf signal；
Frequency conversion processing unit, for the filtered described first via and described multi-channel rf signal are all downconverted to intermediate frequency,
Obtain the first via and multichannel intermediate-freuqncy signal；
Combining processing unit, for being combined the described first via and described multichannel intermediate-freuqncy signal, obtains the first combining intermediate frequency
Signal, and described first combining intermediate-freuqncy signal is passed through if bandpas filter, obtain described first analog if signal.
8. a kind of RF signal collection playback reproducer according to claim 6 is it is characterised in that described second data processing
Module includes：
Second work(divides processing unit, for carrying out work(office reason to described second analog if signal, obtains multi-channel analog intermediate frequency
Signal；
Upconversion process unit, for carrying out upconversion process according to described local oscillator to described multi-channel analog intermediate-freuqncy signal, obtains
Multichannel up-conversion signal；
Bandpass filtering unit, for carrying out bandpass filtering to described multichannel up-conversion signal, and by filtered described multichannel
Frequency variation signal is combined, and obtains the second combining up-conversion signal；
3rd work(divides processing unit, divides for carrying out two work(to described second combining up-conversion signal, obtains first via up-conversion
Signal and the second road up-conversion signal, described first via up-conversion signal directly exports.
9. a kind of RF signal collection playback reproducer according to claim 8 is it is characterised in that described second data processing
Module also includes：
Test module, for described second road up-conversion signal is sent to reference receiver, to be tested.
10. a kind of RF signal collection playback reproducer according to claim 9 is it is characterised in that also include：
Synchronised clock module, for when receiving the radiofrequency signal of aeronautical satellite transmitting by array received antenna, introducing same
Individual external clock, to ensure synchronous acquisition playback.
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| CN106788479A (en) * | 2017-03-17 | 2017-05-31 | 成都玖锦科技有限公司 | Mono-channel radio-frequency signal acquisition playback system |
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| CN110850449B (en) * | 2020-01-15 | 2020-05-05 | 湖南卫导信息科技有限公司 | High-precision measurement type receiver testing method based on real signal recording and playing |
| CN113434427A (en) * | 2021-07-06 | 2021-09-24 | 和芯星通科技(北京)有限公司 | Method and device for realizing test verification, computer storage medium and terminal |
| CN117155456A (en) * | 2023-08-31 | 2023-12-01 | 北京中捷时代航空科技有限公司 | Array signal acquisition and playback method, system, electronic device and readable storage medium |
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| CN106405585B (en) | 2019-03-19 |
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