CN105703796B - A kind of Multiband-multimode software radio experiment teaching system - Google Patents
A kind of Multiband-multimode software radio experiment teaching system Download PDFInfo
- Publication number
- CN105703796B CN105703796B CN201610133238.0A CN201610133238A CN105703796B CN 105703796 B CN105703796 B CN 105703796B CN 201610133238 A CN201610133238 A CN 201610133238A CN 105703796 B CN105703796 B CN 105703796B
- Authority
- CN
- China
- Prior art keywords
- frequency
- fpga
- processing platform
- intermediate frequency
- speed
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
Abstract
The invention discloses a kind of Multiband-multimode software radio experiment teaching systems.Transmitting antenna 101 and receiving antenna 102 including covering 2MHz~8GHz；The RF signal that receiving antenna 102 receives 2MHz~8GHz is sent to the front end RF 103, the front end RF 103 exports intermediate-freuqncy signal IF2 to intermediate frequency data acquisition and SDR processing platform 104, intermediate frequency data acquisition exports the front end intermediate-freuqncy signal IF1 to RF 103 with SDR processing platform 104, and the front end RF 103 exports RF signal and radiate by transmitting antenna 101；The front end RF 103, intermediate frequency data acquisition realize data communication by cpci bus 106 with SDR processing platform 104, host computer master controller 105.The universal integrated of intermediate frequency data acquisition of the present invention and SDR processing platform is designed as the experiment teaching system and provides more wide applicability.
Description
Technical field
The invention belongs to wireless communication field more particularly to it is a kind of be widely portable to what electronic communication class profession used,
Multiband-multimode software radio experiment teaching system.
Background technique
Wireless communication system structure is given in the rapid development of software radio (Software Defined Radio, SDR) technology
Frame brings very big change.Its basic thought is to reduce simulation process link, and by soft as much as possible by ADC close to antenna
Part configures hardware, in the case where hardware platform is constant, can be deacclimatized not by the flexible reconfigurable configuration of software function
Same communication system.Therefore, the versatility platform based on software radio framework can by multiband, multimode radio-frequency front end with
It is combined closely, to meet the restructural requirement of wireless communication system Multiband-multimode, flexible software design, makes modern nothing
The flexibility with higher of line communication system and adaptability.
With the popularization and application of software and radio technique, the experiment teaching system constructed using software radio thought
Gradually emerge in large numbers.In terms of the research of software radio experiment teaching system, document " multiband, multi-mode software radio stylobate
The development of band and main control module " it is studied mainly for Base-Band Processing link, it does not include radio frequency and host computer main control
Device part, it is different with the present invention；Document " based on software radio teaching experiment platform design and realize " and " be based on software without
The design and realization of the cdma communication system of line electricity experiment porch " it is also the research for being directed to intermediate frequency subsequent processing Platform Designing, no
Have multi-frequency band radio-frequency front end and its main controller system, it is different with the present invention；A kind of patent " four letters based on software radio
Road shortwave digital signal processing platform " mainly around the design of base band signal process platform, have with the invention patent design framework
Not；Patent " a kind of software radio RF receiving/transmission device and method based on PCIE interface " does not include Multiband-multimode system
Design, it is different with the present invention.
Summary of the invention
The object of the present invention is to provide a kind of strong flexibility, Multiband-multimode software radio experiment teaching systems.
A kind of Multiband-multimode software radio experiment teaching system, the transmitting antenna including covering 2MHz~8GHz
101 with receiving antenna 102, the front end RF 103, intermediate frequency data acquisition with SDR processing platform 104, host computer master controller 105 and
Cpci bus 106；
The RF signal that receiving antenna 102 receives 2MHz~8GHz is sent to the front end RF 103, and the front end RF 103 exports intermediate frequency letter
To intermediate frequency data acquisition and SDR processing platform 104, intermediate frequency data acquisition exports intermediate-freuqncy signal with SDR processing platform 104 by number IF2
The front end IF1 to RF 103, the front end RF 103 export RF signal and radiate by transmitting antenna 101；The front end RF 103, intermediate frequency data
Acquisition realizes data communication by cpci bus 106 with SDR processing platform 104, host computer master controller 105.
A kind of Multiband-multimode software radio experiment teaching system of the present invention can also include:
1,103 part of the front end RF includes transmission channel and receiving channel, realizes full duplex using multiband division mode
FDD/TDD realizes covering for 2MHz~8GHz frequency range by tri- 2MHz~2GHz, 2GHz~4GHz, 4GHz~8GHz frequency ranges respectively
Lid.
2, the front end RF 103 include FPGA201, and be connected with FPGA201 frequency configuration 202, attenuator 203, increase
Benefit control 204, logic switch control 205, PLL206, power module 207, FLASH208, radio-frequency filter 209, intermediate frequency filtering
Device 210 and CPCI211；
The front end RF 103 uses CPCI standard bus architecture, and CPCI agreement is realized by FPGA201, by FPGA210
CPCI controller access to the SRAM in FPGA201, realized by the control protocol arranged in advance to from equipment radio frequency
Control.
3, frequency includes crystal oscillator 301, DPLL302, the first high-speed d/a converter according to acquisition and 104 part of SDR processing platform
303, the second high-speed a/d converter 304, FPGA305, DSP306 and CPCI307；Crystal oscillator 301 provides a 20MHz's for DPLL
Reference clock；DPLL302 exports a required sampling clock and turns to the second high-speed a/d under the serial data configuration of FPGA305
Parallel operation 304, realizes 2 Analog-digital Converter of medium-frequency IF, and the digital signal after being sampled is sent in FPGA305；DPLL302 exists
Under the serial data configuration of FPGA305, a required sampling clock is exported to the first high-speed d/a converter 303, FPGA305
The digital quantity of output carries out digital-to-analogue conversion by the first high-speed d/a converter 303, obtains required medium-frequency IF 1 and exports.
The utility model has the advantages that
One of present invention Multiband-multimode software radio experiment teaching system, radio-frequency front-end can cover
Tri- 2MHz~2GHz, 2GHz~4GHz, 4GHz~8GHz frequency ranges, may be implemented penetrating for the FDD/TDD mode of full duplex mode
It takes place frequently and penetrates and radio frequency reception, radio-frequency front-end parameter flexible setting is realized by host computer, and experimental teaching project is all in intermediate frequency
Data are acquired and are realized on SDR processing platform, and the experiment teaching system that modular design method makes has more flexible behaviour
Make environment, intermediate frequency data acquisition and the universal integrated design of SDR processing platform also provide more for the experiment teaching system
Wide applicability, user can be by the experiment teaching systems, and only need to change software program can meet not homologous ray, difference
The task of function and design objective provides the platform of more versatility for the teaching of electronic communication class related experiment.
Detailed description of the invention
A kind of Multiband-multimode software radio experiment teaching system composition block diagram Fig. 1 of the invention；
System radio frequency front-end control part composition block diagram Fig. 2 of the invention；
The acquisition of system intermediate frequency data and SDR processing platform structure block diagram Fig. 3 of the invention；
Software radio experimental teaching modular construction Fig. 4 of the invention.
Specific embodiment
The present invention is described in further details below in conjunction with attached drawing.
The object of the present invention is to provide a kind of Multiband-multimode software radio experiment teaching systems.
The object of the present invention is achieved like this: a kind of Multiband-multimode software radio experiment teaching system, group
At transmitting antenna 101, receiving antenna 102, the front end RF 103, intermediate frequency data acquisition and the SDR processing for including covering 2MHz~8GHz
Platform 104, host computer master controller 105 and cpci bus 106.The RF signal that receiving antenna 102 receives 2MHz~8GHz is sent into
To the front end RF 103, wherein 103 part of the front end RF includes transmission channel and receiving channel, and it is real to use multiband division mode
Showed full duplex FDD/TDD, respectively by tri- 2MHz~2GHz, 2GHz~4GHz, 4GHz~8GHz frequency ranges realize 2MHz~
The covering of 8GHz frequency range；The front end RF 103 exports intermediate-freuqncy signal IF2 to intermediate frequency data acquisition and SDR processing platform 104；Middle frequency
The front end intermediate-freuqncy signal IF1 to RF 103 is exported according to acquisition and SDR processing platform 104, the front end RF 103 exports RF signal by transmitting
Antenna 101 is radiate；The front end RF 103, intermediate frequency data acquisition pass through with SDR processing platform 104, host computer master controller 105
Cpci bus 106 realizes data communication.
It should be noted that 103 main control circuit part of the front end RF includes FPGA201, frequency configuration 202, attenuator
203, gain control 204, logic switch control 205, PLL206, power module 207, FLASH208, radio-frequency filter 209, in
Frequency filter 210, CPCI211 composition；The front end RF 103 uses CPCI standard bus architecture, and CPCI agreement is carried out by FPGA201
It realizes, main equipment accesses to the SRAM in FPGA201 by the CPCI controller in FPGA210, passes through what is arranged in advance
Control protocol realizes the control to various functions such as radio frequencies from equipment.
A kind of Multiband-multimode software radio experiment teaching system, intermediate frequency data acquisition are handled with SDR
104 part of platform include crystal oscillator 301, DPLL302, high-speed d/a converter 303, high-speed a/d converter 304, FPGA305,
DSP306, CPCI307 composition.Wherein crystal oscillator 301 is reference clock input, provides the reference clock of a 20MHz for DPLL；
DPLL302 under the serial data configuration of FPGA305, sampling clock needed for exporting a system to high-speed a/d converter 304,
Realize 2 Analog-digital Converter of medium-frequency IF, the digital signal after being sampled is sent in FPGA305；DPLL302 is FPGA305's
Under serial data configuration, sampling clock needed for can similarly exporting a system is to high-speed d/a converter 303, FPGA305
The digital quantity of output carries out digital-to-analogue conversion by high-speed d/a converter 303, obtains required medium-frequency IF 1 and exports.
It should be noted that a kind of Multiband-multimode software radio experiment teaching system, experimental teaching
Project uses Development of Modular, all acquires in intermediate frequency data and realizes on SDR processing platform, the object of Development of Modular is
FPGA305 and DSP306.
The present invention is to provide a kind of Multiband-multimode software radio experiment teaching system, composition includes covering
The transmitting antenna 101 of 2MHz~8GHz, receiving antenna 102, the front end RF 103, intermediate frequency data acquisition and SDR processing platform 104, on
Position owner's controller 105 and cpci bus 106 form.Before the RF signal that receiving antenna 102 receives 2MHz~8GHz is sent to RF
The front end 103, RF 103 is held to export intermediate-freuqncy signal IF2 to intermediate frequency data acquisition and SDR processing platform 104；Intermediate frequency data acquisition with
SDR processing platform 104 exports the front end intermediate-freuqncy signal IF1 to RF 103, and the front end RF 103 exports RF signal and passes through 101 spoke of transmitting antenna
It is shot out；The front end RF 103, intermediate frequency data acquisition pass through cpci bus with SDR processing platform 104, host computer master controller 105
106 realize data communication.The experiment teaching system all experimentss project is real in intermediate frequency data acquisition and SDR processing platform
Existing, the universal integrated of intermediate frequency data acquisition and SDR processing platform is designed as the experiment teaching system and provides more widely
Applicability.
103 part of the front end RF includes transmission channel and receiving channel, is realized using multiband division mode complete double
Work FDD/TDD realizes 2MHz~8GHz frequency range by tri- 2MHz~2GHz, 2GHz~4GHz, 4GHz~8GHz frequency ranges respectively
Covering.
103 main control circuit part of the front end RF includes FPGA201, frequency configuration 202, attenuator 203, gain control
204, logic switch control 205, PLL206, power module 207, FLASH208, radio-frequency filter 209, intermediate-frequency filter 210,
CPCI211 composition.
The front end RF 103 uses CPCI standard bus architecture, and CPCI agreement is realized that main equipment passes through by FPGA201
CPCI controller in FPGA210 accesses to the SRAM in FPGA201, by the control protocol arranged in advance realize to from
The control of the various functions such as the radio frequency of equipment.
Intermediate frequency data acquisition and 104 part of SDR processing platform include crystal oscillator 301, DPLL302, high-speed d/a converter
303, high-speed a/d converter 304, FPGA305, DSP306, CPCI307 composition.
Experimental teaching project uses Development of Modular, all acquires and realizes on SDR processing platform, mould in intermediate frequency data
The object that block melts hair is FPGA305 and DSP306.
In conjunction with Fig. 1, a kind of Multiband-multimode software radio experiment teaching system, composition include covering 2MHz~
Transmitting antenna 101, receiving antenna 102, the front end RF 103, the intermediate frequency data of 8GHz acquires and SDR processing platform 104, upper owner
Controller 105 and CPCI (Compact Peripheral Component Interconnect, the interconnection of compact peripheral component
Standard) bus 106.Wherein transmitting antenna 101 and receiving antenna 102 cover 2MHz~8GHz frequency range, and the front end RF 103 includes hair
Penetrate channel and receiving channel, realize full duplex FDD/TDD using multiband division mode, respectively by 2MHz~2GHz,
Tri- 2GHz~4GHz, 4GHz~8GHz frequency ranges realize the covering of 2MHz~8GHz frequency range.Intermediate frequency data acquisition and SDR processing are flat
Platform 104 also includes transmission channel and receiving channel, and wherein transmission channel exports the front end intermediate-freuqncy signal IF1 to RF 103, receives logical
Road receiving intermediate frequency signal IF2 is acquired and SDR processing platform 104 to intermediate frequency data.At the front end RF 103, intermediate frequency data acquisition and SDR
Platform 104, host computer master controller 105 realize data communication by cpci bus 106.103 part of the front end RF passes through 2MHz
Tri- frequency ranges of~2GHz, 2GHz~4GHz, 4GHz~8GHz realize the covering of 2MHz~8GHz frequency range, wherein in three frequency ranges
Any one frequency range all include be mixed, filter three times, thus realize transmission channel medium-frequency IF 1 to the conversion of radio frequency and
Conversion of the receiving channel radio frequency to medium-frequency IF 2.Wherein, in the specific implementation process, intermediate-freuqncy signal IF1 and intermediate-freuqncy signal IF2
It is selected as 70MHz or 220MHz, intermediate-frequency filter bandwidth can include by the configurable selection of host computer master controller 105
Five kinds of optional bandwidth of 50KHz, 5MHz, 20MHz, 40MHz and 100MHz, can satisfy the function under not homologous ray, different mode
It can be with the requirement of technical indicator.The part host computer master controller 105 is realized by cpci bus and is filtered to 103 part of the front end RF
The control of device bandwidth selection.After intermediate frequency data acquisition is with 104 receiving intermediate frequency signal IF2 of SDR processing platform, in the SDR processing platform
The realization of base band signal process related algorithm under Experimental Instruction Environment is completed, final signal processing result can be by cpci bus
It passes to host computer master controller 105 and realizes storage, display etc.；Meanwhile host computer master controller 105 can also pass through cpci bus
Control command is assigned to intermediate frequency data acquisition and SDR processing platform 104, is completed under Experimental Instruction Environment in the SDR processing platform
The required front end intermediate-freuqncy signal IF1 to RF 103 is exported after the realization of base band signal process related algorithm.
Fig. 2 is the system radio frequency front-end control part composition block diagram of invention, includes FPGA201, frequency configuration 202, declines
Subtract device 203, gain control 204, logic switch control 205, PLL206, power module 207, FLASH208, radio-frequency filter
209, intermediate-frequency filter 210, CPCI211 composition；The front end RF 103 use CPCI standard bus architecture, CPCI agreement by
FPGA201 is realized that main equipment accesses to the SRAM in FPGA201 by the CPCI controller in FPGA201, is passed through
The control protocol arranged in advance realizes the control to various functions such as radio frequencies from equipment.Wherein, frequency configuration 202 can configure
Frequency range is 2MHz~8GHz；Attenuator 203 can realize the adjustable attenuation of 0~60dB, step value 1dB；Gain control 204
Control range be more than or equal to 60dB；Logic switch control 205 includes the control of multiband pattern switching, full duplex FDD/TDD
Pattern switching control etc.；Radio-frequency filter 209 controls configuration radio-frequency filter selection mode according to Multiband hondover；Intermediate frequency filtering
Device 210 has respectively corresponded five kinds of filter bandwidht selections according to intermediate frequency 70MHz or 220MHz, including 70MHz intermediate frequency corresponds to
50KHz, 5MHz, 20MHz bandwidth and the corresponding 40MHz and 100MHz bandwidth of 220MHz intermediate frequency.
Fig. 3 is the acquisition of system intermediate frequency data and SDR processing platform structure block diagram of the invention, and composition includes crystal oscillator
301, DPLL302, high-speed d/a converter 303, high-speed a/d converter 304, FPGA305, DSP306, CPCI307 composition.Its
In, crystal oscillator 301 is reference clock input, provides the reference clock of a 20MHz for DPLL；DPLL302 is in the serial of FPGA305
Under data configuration, sampling clock needed for exporting a system realizes that 2 simulation numeral of medium-frequency IF turns to high-speed a/d converter 304
It changes, the digital signal after being sampled is sent in FPGA305；DPLL302 is under the serial data configuration of FPGA305, similarly
Sampling clock needed for a system can be exported passes through high speed to high-speed d/a converter 303, the digital quantity of FPGA305 output
D/A converter 303 carries out digital-to-analogue conversion, obtains required medium-frequency IF 1 and exports.Wherein, transmission channel medium-frequency IF 1 and reception
Channel medium-frequency IF 2 is 70MHz or 220MHz, five kinds of optional bands of bandwidth 50KHz, 5MHz, 20MHz, 40MHz and 100MHz
Width needs to adapt to whole intermediate frequencies and bandwidth according to the high-speed d/a converter 303 of above-mentioned parameter selection, high-speed a/d converter 304
Parameter.Specific implementation process high speed D/A converter 303 is using a highest sample rate 1000Msps, resolution ratio 16bit
DAC, high-speed a/d converter 304 adopts using a highest sample rate 1000Msps, the ADC of resolution ratio 12bit, DPLL
It is clock chip that is a while can provide 12 tunnels, highest output clock 1600MHz.High-speed d/a converter 303, high speed
Data transmission between A/D converter 304 and FPGA305 realizes data transmission using LVDS interface.FPGA305 and DSP306 it
Between use EMIF interface and SRIO interface two ways, wherein EMIF interface can make the number between DSP306 and FPGA305
It is more efficient and convenient according to accessing；The GTX of the SRIO and FPGA305 of DSP306 in design are connected, and realize the SRIO of 4X, maximum belt
Width can reach 40Gbps, can satisfy high speed data transmission system application.FPGA305, DSP306 pass through respectively cpci bus with
Host computer master controller 105 is connected, and host computer master controller 105 may be implemented and issue an order control to FPGA305, DSP306,
Also it FPGA305, DSP306 data processed result may be implemented is reported to host computer master controller 105 to be stored, shown.
In conjunction with Fig. 4, a kind of Multiband-multimode software radio experiment teaching system, experiment instructional item uses module
Hair is melted, all acquired in intermediate frequency data and is realized on SDR processing platform, the object of Development of Modular is FPGA and DSP.Its
In, the pattern experiment teaching that FPGA portion can carry out includes Digital up and down convert pattern experiment, digital filter block
Experiment, signal of communication modulation /demodulation pattern experiment etc.；The pattern experiment teaching that the part DSP can carry out includes fast Flourier
Conversion module experiment, the experiment of Radar Signal Processing algoritic module, the experiment of communication signal encryption deciphering moduleization etc..Multiband
Multi-mode software radio experiment teaching system can send control command by host computer master controller and realize multiband, multi-mode
Setting, in the case where the specific frequency range of determination, mode, can intermediate frequency data acquire on SDR processing platform using FPGA and
DSP completes the Development of Modular of all kinds of software radio experimental teachings.
The present invention is able to carry out the building of Multiband-multimode software radio experiment teaching system.Described in embodiment
FPGA can also be designed with other programmable logic devices and complete the function, DSP can also use other general processors
Or microprocessor is realized or is realized in a joint manner.
Claims (1)
1. a kind of Multiband-multimode software radio experiment teaching system, it is characterised in that: its form include covering 2MHz~
Transmitting antenna, receiving antenna, the front end RF, the intermediate frequency data of 8GHz acquires and SDR processing platform, host computer master controller and CPCI
Bus；Wherein transmitting antenna and receiving antenna cover 2MHz~8GHz frequency range, and the front end RF includes transmission channel and receiving channel, is adopted
Full duplex FDD/TDD is realized with multiband division mode, respectively by 2MHz~2GHz, 2GHz~4GHz, 4GHz~8GHz tri-
The covering of frequency range realization 2MHz~8GHz frequency range；Intermediate frequency data acquisition also includes transmission channel with SDR processing platform and receives logical
Road, wherein transmission channel exports the front end intermediate-freuqncy signal IF1 to RF, and receiving channel receiving intermediate frequency signal IF2 to intermediate frequency data is acquired
With SDR processing platform；The front end RF, intermediate frequency data acquisition are realized with SDR processing platform, host computer master controller by cpci bus
Data communication；2MHz~8GHz is realized by tri- 2MHz~2GHz, 2GHz~4GHz, 4GHz~8GHz frequency ranges in the front end portion RF
The covering of frequency range, wherein any one of three frequency ranges frequency range all includes being mixed, filtering three times, to realize in transmission channel
Frequency IF1 to radio frequency conversion and receiving channel radio frequency to medium-frequency IF 2 conversion；Wherein, in the specific implementation process, in
Frequency signal IF1 and intermediate-freuqncy signal IF2 is selected as 70MHz or 220MHz, and intermediate-frequency filter bandwidth is configured by host computer master controller
Selection, selects from five kinds of bandwidth of 50KHz, 5MHz, 20MHz, 40MHz and 100MHz, meets under not homologous ray, different mode
The requirement of function and technical indicator；The part host computer master controller is realized by cpci bus to the front end portion RF filter band
Width selection control；Intermediate frequency data acquisition is completed to test with after SDR processing platform receiving intermediate frequency signal IF2 in the SDR processing platform
The realization of base band signal process related algorithm under teaching environment, final signal processing result upload to host computer by cpci bus
Master controller realizes storage and display；Meanwhile host computer master controller assigns control command to middle frequency also by cpci bus
According to acquisition and SDR processing platform, the reality of base band signal process related algorithm in the case where the SDR processing platform completes Experimental Instruction Environment
The required front end intermediate-freuqncy signal IF1 to RF is now exported afterwards；
System radio frequency front-end control part, including FPGA, frequency configuration, attenuator, gain control, logic switch control, PLL,
Power module, FLASH, radio-frequency filter, intermediate-frequency filter and CPCI；The front end RF uses CPCI standard bus architecture, CPCI association
View is realized that main equipment accesses to the SRAM in FPGA by the CPCI controller in FPGA, by prior by FPGA
The control protocol of agreement realizes the control to the radio-frequency enabled from equipment；Wherein, the frequency range of frequency configuration be 2MHz~
8GHz；Attenuator realizes the adjustable attenuation of 0~60dB, step value 1dB；The control range of gain control is more than or equal to 60dB；
Logic switch control includes the control of multiband pattern switching, the control of full duplex FDD/TDD pattern switching；Radio-frequency filter is according to more
Frequency range switching control configures radio-frequency filter selection mode；Intermediate-frequency filter respectively corresponds five according to intermediate frequency 70MHz or 220MHz
The selection of kind of filter bandwidht, including corresponding 50KHz, 5MHz, 20MHz bandwidth of 70MHz intermediate frequency and 220MHz intermediate frequency it is corresponding
40MHz and 100MHz bandwidth；
Intermediate frequency data acquisition with SDR processing platform include crystal oscillator, DPLL, high-speed d/a converter, high-speed a/d converter, FPGA,
DSP and CPCI；Wherein, crystal oscillator is reference clock input, provides the reference clock of a 20MHz for DPLL；DPLL is FPGA's
Under serial data configuration, sampling clock needed for exporting a system realizes that 2 simulation numeral of medium-frequency IF turns to high-speed a/d converter
It changes, the digital signal after being sampled is sent in FPGA；DPLL also exports a system institute under the serial data configuration of FPGA
It needs sampling clock to give high-speed d/a converter, the digital quantity of FPGA output is carried out digital simulation by high-speed d/a converter and is turned
It changes, obtains required medium-frequency IF 1 and export；Wherein, transmission channel medium-frequency IF 1 and receiving channel medium-frequency IF 2 be 70MHz or
220MHz, bandwidth is selected from five kinds of bandwidth of 50KHz, 5MHz, 20MHz, 40MHz and 100MHz, according to above-mentioned bandwidth selection
High-speed d/a converter, high-speed a/d converter need to adapt to whole intermediate frequencies and bandwidth parameter；Specific implementation process high speed D/A turns
Parallel operation is using a highest sample rate 1000Msps, and the DAC of resolution ratio 16bit, high-speed a/d converter is using a
Highest sample rate 1000Msps, the ADC of resolution ratio 12bit, DPLL export clock using a while 12 tunnels of offer, highest
The clock chip of 1600MHz；Data transmission between high-speed d/a converter, high-speed a/d converter and FPGA uses LVDS interface
Realize data transmission；Between FPGA and DSP use EMIF interface and SRIO interface two ways, wherein EMIF interface make DSP and
Data access between FPGA is more efficient and convenient；The GTX of the SRIO and FPGA of DSP in design are connected, and realize the SRIO of 4X,
Maximum bandwidth can reach 40Gbps, meet high speed data transmission system application；FPGA, DSP pass through respectively cpci bus with it is upper
Owner's controller is connected, and realizes that host computer master controller issues an order control to FPGA, DSP, also realizes at FPGA, DSP data
Reason result is reported to host computer master controller and is stored, shown；
Experimental teaching project uses Development of Modular, all acquires and realizes on SDR processing platform, modularization in intermediate frequency data
The object of exploitation is FPGA and DSP；Wherein, the pattern experiment teaching that FPGA portion carries out includes Digital up and down convert modularization
Experiment, digital filter block experiment, signal of communication modulation /demodulation pattern experiment；The pattern experiment that the part DSP carries out
Teaching includes Fast Fourier Transform Block experiment, the experiment of Radar Signal Processing algoritic module, communication signal encryption decryption
Pattern experiment；Multiband-multimode software radio experiment teaching system sends control command reality by host computer master controller
The setting of existing multiband, multi-mode, in the case where the specific frequency range of determination, mode, in intermediate frequency data acquisition and SDR processing platform
On the Development of Modular of all kinds of software radio experimental teachings is completed using FPGA and DSP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610133238.0A CN105703796B (en) | 2016-03-09 | 2016-03-09 | A kind of Multiband-multimode software radio experiment teaching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610133238.0A CN105703796B (en) | 2016-03-09 | 2016-03-09 | A kind of Multiband-multimode software radio experiment teaching system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105703796A CN105703796A (en) | 2016-06-22 |
| CN105703796B true CN105703796B (en) | 2019-02-26 |
Family
ID=56220064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610133238.0A Active CN105703796B (en) | 2016-03-09 | 2016-03-09 | A kind of Multiband-multimode software radio experiment teaching system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105703796B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106373458A (en) * | 2016-11-15 | 2017-02-01 | 湖北大学 | Software radio technology-based communication experiment device and experiment method therefor |
| CN106850113B (en) * | 2017-01-03 | 2019-06-04 | 惠州Tcl移动通信有限公司 | A kind of TDD control method and system based on OAI platform |
| CN107678014A (en) * | 2017-08-23 | 2018-02-09 | 天津大学 | Software radio is in cognition passive radar system and implementation method |
| US11815619B1 (en) | 2018-01-30 | 2023-11-14 | StormQuant, Inc. | Radar configuration using stationary feed horn, signal generator, and reflector |
| CN110070790A (en) * | 2019-04-11 | 2019-07-30 | 广州大学 | Multi-modal communications demo system based on software radio |
| CN110266325A (en) * | 2019-05-30 | 2019-09-20 | 中国人民解放军63921部队 | A kind of device carrying out satellite communication using software radio |
| CN110264793A (en) * | 2019-06-19 | 2019-09-20 | 常德职业技术学院 | A kind of accounting computerization data processing teaching dual-purpose system and method |
| CN113539028A (en) * | 2021-07-19 | 2021-10-22 | 中国人民解放军空军工程大学航空机务士官学校 | Radar signal demonstration device and demonstration method |
| CN113890782B (en) * | 2021-09-24 | 2023-06-06 | 哈尔滨工程大学 | Software radio platform, method and device for loading task program |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664642A (en) * | 2012-04-09 | 2012-09-12 | 北京航空航天大学 | Software radio system based on frequency spectrum sensing |
| CN102694557A (en) * | 2012-06-12 | 2012-09-26 | 成都林海电子有限责任公司 | Multi-channel demodulation signal processing platform based on CPCI (compact programmable communication interface) |
| CN103294543A (en) * | 2013-06-28 | 2013-09-11 | 马骁 | Data mixed processing module based on high-speed bus and software radio platform |
| CN104967456A (en) * | 2015-06-11 | 2015-10-07 | 哈尔滨工程大学 | CPCI bus control type radio-frequency transmission board card and transmitting-receiving board card |
| CN104965802A (en) * | 2015-06-11 | 2015-10-07 | 哈尔滨工程大学 | Multifunctional radio frequency comprehensive integrated apparatus and system based on CORBA standard |
-
2016
- 2016-03-09 CN CN201610133238.0A patent/CN105703796B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664642A (en) * | 2012-04-09 | 2012-09-12 | 北京航空航天大学 | Software radio system based on frequency spectrum sensing |
| CN102694557A (en) * | 2012-06-12 | 2012-09-26 | 成都林海电子有限责任公司 | Multi-channel demodulation signal processing platform based on CPCI (compact programmable communication interface) |
| CN103294543A (en) * | 2013-06-28 | 2013-09-11 | 马骁 | Data mixed processing module based on high-speed bus and software radio platform |
| CN104967456A (en) * | 2015-06-11 | 2015-10-07 | 哈尔滨工程大学 | CPCI bus control type radio-frequency transmission board card and transmitting-receiving board card |
| CN104965802A (en) * | 2015-06-11 | 2015-10-07 | 哈尔滨工程大学 | Multifunctional radio frequency comprehensive integrated apparatus and system based on CORBA standard |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105703796A (en) | 2016-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105703796B (en) | A kind of Multiband-multimode software radio experiment teaching system | |
| CN107819489B (en) | A kind of ultra wide band high bandwidth radio-frequency receiving-transmitting two-way integral integration module | |
| CN104506205B (en) | A kind of software radio receiver radio system | |
| CN108333958B (en) | Multiplexing general aviation simulator | |
| CN104135301A (en) | Radio frequency receiver and receiving method | |
| CN105553499A (en) | Mobile terminal radio frequency front-end and mobile terminal | |
| CN110943712A (en) | Digital down conversion filtering system | |
| CN103944601A (en) | PCIE (peripheral component interface express) interface based software radio frequency transmitter-receiver and method | |
| CN103957017B (en) | A kind of signal intermediate frequency discharger of multi-mode mobile communication system | |
| CN104967456A (en) | CPCI bus control type radio-frequency transmission board card and transmitting-receiving board card | |
| CN109995387A (en) | A kind of method that broadband receiver inhibits Image interference | |
| Rahman et al. | A practical approach to spectrum analyzing unit using rtl-sdr | |
| CN104378136A (en) | Wireless transceiver | |
| CN100411310C (en) | Medium frequency signal processing method and circuit in receiver | |
| CN106063136B (en) | A kind of agile transceiver architecture | |
| CN106788473B (en) | The restructural radio frequency transmit-receive method of broadband waveform based on software radio | |
| Mahboob | FPGA implementation of digital up/down convertor for WCDMA system | |
| CN203643599U (en) | Secondary radar high- and intermediate-frequency digital receiver | |
| CN103152111B (en) | USB interface-based software radio test platform | |
| CN109683139A (en) | A kind of radio frequency based on double sampled rate directly adopts digital transceiver circuits | |
| CN107181496A (en) | High bandwidth software radio development platform | |
| Pawłowski et al. | Software defined radio-design and implementation of complete platform | |
| Nussbaum et al. | Open platform for prototyping of advanced software defined radio and cognitive radio techniques | |
| Chamberlain | A software defined HF radio | |
| CN102790640B (en) | Field programmable gate array (FPGA) based multi-system, multi-band and multi-carrier digital repeater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |