CN206421029U - Multichannel satellite navigation radio-frequency signal gathers playback system - Google Patents
Multichannel satellite navigation radio-frequency signal gathers playback system Download PDFInfo
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- CN206421029U CN206421029U CN201720101542.7U CN201720101542U CN206421029U CN 206421029 U CN206421029 U CN 206421029U CN 201720101542 U CN201720101542 U CN 201720101542U CN 206421029 U CN206421029 U CN 206421029U
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Abstract
The utility model discloses a kind of multichannel satellite navigation radio-frequency signal collection playback system, is made up of radio-frequency module, signal acquisition playback module and storage control module；Radiofrequency signal accesses the collection input of radio-frequency module, and the collection output end of radio-frequency module connects the collection input of signal acquisition playback module；The playback output end of signal acquisition playback module connects the playback input of radio-frequency module, the playback output end output radiofrequency signal of radio-frequency module.The utility model is analyzed and test environment for satellite navigation system signals, research and development are based on China's Beidou satellite navigation system, the navigation RF signal collection playback system of the collection playback channels of 3 navigation patterns supplemented by GPS/GLONASS systems, the satellite navigation signals of any number of frequencies in 1.1GHz 1.7GHz frequency ranges can be acquired or be played back simultaneously, each passage supports 8MHz bandwidth, the demand of current civil aviaton's navigation signal collection playback can be fully met, user can set to the port number and the frequency of each passage for gathering and playing back.
Description
Technical field
The utility model is related to technical field of electronic communication, and in particular to a kind of multichannel satellite navigation radio-frequency signal collection
Playback system.
Background technology
RF signal collection playback system turns into the important tool in production, scientific research, and is widely used in navigation, thunder
Reach, meteorology, Aero-Space, the field such as communication.Navigation radiofrequency signal has real-time, data transfer rate height, and greatly, processing is multiple for data volume
Miscellaneous the features such as, the real-time acquisition and recording of such aerial signal can be got off using RF signal collection playback system, be divided
Analysis and algorithm research.Accelerate simultaneously in actual work requirements in order to verify the performance indications of various receivers newly developed
The development rate of new product, often will provide programmable test signal for newly-designed receiver.Pass through application program
Control, the radiofrequency signal of the actual acquisition according to certain requirement by storage in a hard disk realizes quick playback (hardware playback),
To simulate real working environment, so as to provide stable, reliable, reusable signal for the exploitation of all kinds of receivers, debugging
Source, reduces time and the development cost of on-the-spot test.Production line test, countryside portable test, Gao Xing can flexibly be applied to
A variety of varying environments such as energy laboratory test, on-road emission test.
With the development of Satellite Navigation Technique, the navigation such as a variety of GLONASS, GPS, BD (big-dipper satellite) can be received simultaneously
The multichannel satellite navigation receiver of system becomes the focus of current research.However, because existing RF signal collection is returned
Put in instrument, while the signal of a satellite navigation system can only be handled, centre frequency is not optional, while can survey band bandwidth has
Limit.The collection playback of the radiofrequency signal of multichannel satellite navigation system can not thus be realized.
Utility model content
To be solved in the utility model to be that existing RF signal collection playback apparatus can survey band bandwidth limited, it is impossible to is applicable
There is provided a kind of multichannel satellite navigation radio-frequency signal the problem of RF signal collection and the playback of multichannel satellite navigation system
Gather playback system.
To solve the above problems, the utility model is achieved through the following technical solutions：
Multichannel satellite navigation radio-frequency signal gathers playback system, by radio-frequency module, signal acquisition playback module and storage
Control module is constituted；Radiofrequency signal accesses the collection input of radio-frequency module, and the collection output end connection signal of radio-frequency module is adopted
Collect the collection input of playback module；The playback output end of signal acquisition playback module connects the playback input of radio-frequency module,
The playback output end output radiofrequency signal of radio-frequency module；Signal acquisition playback module is connected with storage control module；The radio frequency
Module includes 4 amplifiers, 6 radio-frequency filters, 4 frequency mixers, local oscillator and attenuator；The input of first amplifier
End forms the collection input of radio-frequency module, and the output end of the first amplifier connects the second amplifier through the first radio-frequency filter
Input, the output end of the second amplifier connects an input of the first frequency mixer through the second radio-frequency filter, frequency mixer
Output end connects the input of the 3rd amplifier through the 3rd radio-frequency filter, and the output end of the 3rd amplifier connects the second frequency mixer
An input, the output end of the second frequency mixer is connected through the 4th radio-frequency filter with the input of the 4th amplifier, the 4th
The collection output end of the output end formation radio-frequency module of amplifier；Time of the input formation radio-frequency module of 5th radio-frequency filter
Input is put, the output end of the 5th radio-frequency filter connects an input of three-mixer, the output end of three-mixer
An input of the 4th frequency mixer is connected through the 6th radio-frequency filter, the output end of the 4th frequency mixer connects the input of attenuator
End, the playback output end of the output end formation radio-frequency module of attenuator；The input access radio frequency reference signal of local oscillator,
4 output ends of local oscillator connect another input of 4 frequency mixers respectively.
In such scheme, 6 radio-frequency filters are SAW filter.
In such scheme, radiofrequency signal accesses the collection input of radio-frequency module, collection output end, playback input and returned
It is SMA interfaces to put output end.
In such scheme, signal acquisition playback module includes collection wave filter, collection transformer, analog-digital converter, playback
Wave filter, playback transformer, digital analog converter, clock distributor, FPGA and MCU compositions；The input of collection wave filter is formed
The collection input of signal acquisition playback module, gathers the output end of wave filter via collection transformer connection analog-digital converter
Input, the output end of analog-digital converter connects FPGA input；FPGA output end connects the input of digital analog converter,
The output end of digital analog converter connects the input of play back filter via playback transformer, and the output end of play back filter is formed
The playback output end of signal acquisition playback module；The input connection reference clock signal of clock distributor, clock distributor
Output end connects the Clock control end of analog-digital converter and digital analog converter；MCU output end connection analog-digital converter, digital-to-analogue turn
The control end of parallel operation and clock distributor；FPGA and MCU are connected with storage control module.
Compared with prior art, the utility model is analyzed and test environment for satellite navigation system signals, is researched and developed with me
Based on state's Beidou satellite navigation system, the navigation of the collection playback channels of 3 navigation patterns supplemented by GPS/GLONASS systems is penetrated
The satellite navigation signals of any number of frequencies in 1.1GHz-1.7GHz frequency ranges can be carried out by frequency signal acquisition playback system simultaneously
Collection is played back, and each passage supports 8MHz bandwidth, can fully meet the demand of current civil aviaton's navigation signal collection playback,
User can set to the port number and the frequency of each passage for gathering and playing back.
Brief description of the drawings
Fig. 1 is the theory diagram that multichannel satellite navigation radio-frequency signal gathers playback system.
Fig. 2 is the theory diagram of data signal acquisition playback module.
Fig. 3 is the theory diagram of radio-frequency module.
Embodiment
A kind of multichannel satellite navigation radio-frequency signal gathers playback system, referring to Fig. 1, using modularized design, by system
It is divided into three below main modular：Radio-frequency module, signal acquisition playback module and storage control module.Radiofrequency signal accesses radio frequency
The collection input of module, the collection output end of radio-frequency module connects the collection input of signal acquisition playback module.Signal is adopted
The playback output end for collecting playback module connects the playback input of radio-frequency module, the playback output end output radio frequency letter of radio-frequency module
Number.Signal acquisition playback module is connected with storage control module.
The radio-frequency module includes 4 amplifiers, 6 radio-frequency filters, 4 frequency mixers, local oscillator and attenuator.
The collection input of the input formation radio-frequency module of first amplifier, the output end of the first amplifier is through the first radio-frequency filter
The input of the second amplifier is connected, the output end of the second amplifier connects one of the first frequency mixer through the second radio-frequency filter
Input, the output end of frequency mixer connects the input of the 3rd amplifier, the output of the 3rd amplifier through the 3rd radio-frequency filter
One input of the second frequency mixer of end connection, the output end of the second frequency mixer is through the 4th radio-frequency filter and the 4th amplifier
Input is connected, the collection output end of the output end formation radio-frequency module of the 4th amplifier.The input of 5th radio-frequency filter
The playback input of radio-frequency module is formed, the output end of the 5th radio-frequency filter connects an input of three-mixer, the
The output end of three-mixer connects an input of the 4th frequency mixer, the output end of the 4th frequency mixer through the 6th radio-frequency filter
Connect the input of attenuator, the playback output end of the output end formation radio-frequency module of attenuator.The input of local oscillator
Radio frequency reference signal is accessed, 4 output ends of local oscillator connect another input of 4 frequency mixers respectively.Above-mentioned 6
Radio-frequency filter is SAW filter.The collection input of radiofrequency signal access radio-frequency module, collection output end, playback input
Hold and playback output end is SMA interfaces.Referring to Fig. 3.
Radio-frequency module realizes the conversion of radiofrequency signal and intermediate-freuqncy signal, including Up/Down Conversion, filtering, amplification and decay etc..
LNA part overall gain 39dB, noise coefficient 0.78dB, radio-frequency channel part overall gain 92dB, noise coefficient 13dB, decay
Part point two-way will be exported after signal attenuation 20dB and 70dB.4 passage independent acquisitions of system are able to reality in radio-frequency channel part
Existing, four road signals of power splitter output are 1.1GHz-1.7GHz full bandwidth signal, unified by two-stage frequency conversion in radio-frequency channel
Four road signals are down-converted to 288MHz, 46MHz, during this, four tunnel radio-frequency channels are by adjusting respective local frequency
Realization moves the signal of different center frequency points to intermediate frequency.
The signal acquisition playback module include collection wave filter, collection transformer, analog-digital converter, play back filter,
Play back transformer, digital analog converter, clock distributor, FPGA and MCU compositions.Gather the input formation signal acquisition of wave filter
The collection input of playback module, the output end for gathering wave filter connects the input of analog-digital converter via collection transformer,
The output end of analog-digital converter connects FPGA input.FPGA output end connects the input of digital analog converter, and digital-to-analogue turns
The output end of parallel operation connects the input of play back filter via playback transformer, and the output end formation signal of play back filter is adopted
Collect the playback output end of playback module.The input connection reference clock signal of clock distributor, the output end of clock distributor
Connect the Clock control end of analog-digital converter and digital analog converter.MCU output end connection analog-digital converter, digital analog converter and
The control end of clock distributor.FPGA and MCU are connected with storage control module.Referring to Fig. 2.
Signal acquisition playback module mainly includes the change of front-end filtering network, AD/DA conversions, and FPGA internal signals
Frequently, intermediate-freuqncy signal digitlization or simulated is realized.During as collection input, intermediate-freuqncy signal first passes through filtering, is passing through transformer
Single-ended signal is become differential signal, the Differential Input driving for meeting ADC chips is required.During as playback output, data are passed through
DAC chip output difference signal, becomes single-ended signal by transformer, is exported by wave filter.ADC and DAC chip clock
Using differential clocks, provided by clock distributor is unified.A piece of single-chip microcomputer processing has been separately configured in each collection/playback channels
Device, is realized by spi bus and is programmed configuration to clock distributor, ADC and DAC, including clock frequency, passage enable, in
Frequency of heart setting, sampling rate conversion etc..
Storage control module mainly realizes the control of data storage and whole RF signal collection/playback system.It is based on
Embedded high-performance processor 88F6282 and PCI Express bussing techniques are realized, (SuSE) Linux OS is run on CPU, main
It is responsible for magnetic disc high speed storage, PC end interconnection (USB, Gigabit Eth), human-computer interface control etc..Key technology is to utilize
DMA realizes exchanging for quick PCIE bus datas and SATA hard disc data in CPU.
Claims (4)
1. multichannel satellite navigation radio-frequency signal gathers playback system, controlled by radio-frequency module, signal acquisition playback module and storage
Molding block is constituted；Radiofrequency signal accesses the collection input of radio-frequency module, the collection output end connection signal acquisition of radio-frequency module
The collection input of playback module；The playback output end of signal acquisition playback module connects the playback input of radio-frequency module, penetrates
The playback output end output radiofrequency signal of frequency module；Signal acquisition playback module is connected with storage control module；
It is characterized in that：The radio-frequency module include 4 amplifiers, 6 radio-frequency filters, 4 frequency mixers, local oscillator and
Attenuator；
The collection input of the input formation radio-frequency module of first amplifier, the output end of the first amplifier is filtered through the first radio frequency
Ripple device connects the input of the second amplifier, and the output end of the second amplifier connects the first frequency mixer through the second radio-frequency filter
One input, the output end of frequency mixer connects the input of the 3rd amplifier through the 3rd radio-frequency filter, the 3rd amplifier
Output end connects an input of the second frequency mixer, and the output end of the second frequency mixer is amplified through the 4th radio-frequency filter and the 4th
The input connection of device, the collection output end of the output end formation radio-frequency module of the 4th amplifier；
The playback input of the input formation radio-frequency module of 5th radio-frequency filter, the output end connection of the 5th radio-frequency filter
One input of three-mixer, the output end of three-mixer connects one of the 4th frequency mixer through the 6th radio-frequency filter
Input, the output end of the 4th frequency mixer connects the input of attenuator, the playback of the output end formation radio-frequency module of attenuator
Output end；
The input access radio frequency reference signal of local oscillator, 4 output ends of local oscillator connect 4 frequency mixers respectively
Another input.
2. multichannel satellite navigation radio-frequency signal according to claim 1 gathers playback system, it is characterised in that：6 are penetrated
Frequency wave filter is SAW filter.
3. multichannel satellite navigation radio-frequency signal according to claim 1 or 2 gathers playback system, it is characterised in that：Penetrate
Collection input, collection output end, playback input and the playback output end of frequency signal access radio-frequency module are SMA interfaces.
4. multichannel satellite navigation radio-frequency signal according to claim 1 gathers playback system, it is characterised in that：The letter
Number collection playback module include collection wave filter, collection transformer, analog-digital converter, play back filter, playback transformer, digital-to-analogue
Converter, clock distributor, FPGA and MCU compositions；
Gather wave filter input formation signal acquisition playback module collection input, gather wave filter output end via
The input that transformer connects analog-digital converter is gathered, the output end of analog-digital converter connects FPGA input；
FPGA output end connects the input of digital analog converter, and the output end of digital analog converter is connected back to via playback transformer
Put the input of wave filter, the playback output end of the output end formation signal acquisition playback module of play back filter；
The input connection reference clock signal of clock distributor, the output end connection analog-digital converter and digital-to-analogue of clock distributor
The Clock control end of converter；MCU output end connects the control end of analog-digital converter, digital analog converter and clock distributor；
FPGA and MCU are connected with storage control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720101542.7U CN206421029U (en) | 2017-01-25 | 2017-01-25 | Multichannel satellite navigation radio-frequency signal gathers playback system |
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| CN201720101542.7U CN206421029U (en) | 2017-01-25 | 2017-01-25 | Multichannel satellite navigation radio-frequency signal gathers playback system |
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| CN206421029U true CN206421029U (en) | 2017-08-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772444A (en) * | 2017-01-25 | 2017-05-31 | 桂林航天工业学院 | Multichannel satellite navigation radio-frequency signal gathers playback system |
| CN110988936A (en) * | 2019-11-26 | 2020-04-10 | 中电科仪器仪表有限公司 | Radio frequency signal recording and playback device and using method thereof |
-
2017
- 2017-01-25 CN CN201720101542.7U patent/CN206421029U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772444A (en) * | 2017-01-25 | 2017-05-31 | 桂林航天工业学院 | Multichannel satellite navigation radio-frequency signal gathers playback system |
| CN110988936A (en) * | 2019-11-26 | 2020-04-10 | 中电科仪器仪表有限公司 | Radio frequency signal recording and playback device and using method thereof |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170818 Termination date: 20200125 |
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| CF01 | Termination of patent right due to non-payment of annual fee |