CN113820975A - Combined programmable radio beacon simulator - Google Patents
Combined programmable radio beacon simulator Download PDFInfo
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- CN113820975A CN113820975A CN202110999087.8A CN202110999087A CN113820975A CN 113820975 A CN113820975 A CN 113820975A CN 202110999087 A CN202110999087 A CN 202110999087A CN 113820975 A CN113820975 A CN 113820975A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The invention relates to the technical field of instruments and meters, in particular to a combined programmable radio beacon simulator, which comprises a PXI case and a controller, and further comprises: the high-speed baseband module consists of a dual-channel 1.25GS/s and 16bit DA circuit, has two paths of DA outputs and can simultaneously complete IQ baseband source output; the L-band dual-channel up-conversion module is connected with the PXI case and the controller by adopting a PXI bus and is used for modulating, converting, filtering, amplifying and attenuating the baseband signals output from the high-speed baseband module and outputting the baseband signals; the radio frequency switch network is used for completing the switching of various analog signals, so that the simulator can multiplex the output port; two-channel conditioning board card. The invention is in modularized integrated design, and realizes online debugging of analog signals by using upper computer programming control. The maintenance of the simulation equipment is convenient, and the rapid repair of the equipment is met through software self-checking and module replacement. And a computer control technology is adopted, so that the expansion and function upgrade of the simulator are facilitated.
Description
Technical Field
The invention relates to the technical field of instruments and meters, in particular to a combined type programmable radio beacon simulator.
Background
Since the general instruments in the market at present can not construct the functions of the special radio beacon simulator, the special radio beacon simulator needs to be developed, and from the form of the traditional beacon simulator, the simulator of a single device is developed specially in the early stage, and the form of a desk-top instrument is also adopted. Although the simulator of the bench-top instrument is relatively higher in performance, the overall equipment is heavier due to the larger size of the conventional bench-top instrument. In addition, because the desktop instrument is closed in architecture, most internal modules are customized modules, the desktop instrument has no universality, the software is mainly embedded software, the maintenance and debugging can only be carried out by a customization manufacturer, the maintenance difficulty is high, the expansibility is poor, and the maintenance and upgrading cost is high, so that the software programmable radio beacon simulator equipment with an open type and a module combined type needs to be researched and designed.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a combined programmable radio beacon simulator. The invention aims to solve the problems of use and maintenance of a desktop and special radio beacon simulator, adopts a combined integration mode, provides a reconfigurable and modularized hardware and software test scheme for a radio frequency microwave instrument, modularizes the same hardware and software parts in the traditional radio frequency microwave instrument through modularized combination, combines the bus technology of a general instrument, adopts a PXI backboard plug-in card type instrument framework, combines a group of optimized standard function modules, and realizes the functions of the radio beacon simulator through software development control. The magnetic azimuth angle information relative to the ground station is provided for airborne equipment of the radio beacon, the normal work of a short-range navigation system and an angle measuring system is ensured, the airplane is guided to fly along a preset air route, and the safe flying and running of the airplane along a channel are ensured.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a combined programmable radio beacon simulator comprises a PXI case and a controller, and further comprises:
the high-speed baseband module consists of a dual-channel 1.25GS/s and 16bit DA circuit, has two paths of DA outputs and can simultaneously complete IQ baseband source output;
the L-band dual-channel up-conversion module is connected with the PXI case and the controller by adopting a PXI bus and is used for modulating, converting, filtering, amplifying and attenuating the baseband signals output from the high-speed baseband module and outputting the baseband signals;
the radio frequency switch network is used for completing the switching of various analog signals, so that the simulator can multiplex the output port;
and the two-channel conditioning board card is respectively connected with the L-waveband two-channel up-conversion module and the radio frequency switch network and is used for amplifying and attenuating the frequency-converted signals and filtering stray interference signals.
Preferably, the high-speed baseband board card comprises an FPGA digital signal processing unit connected with the PXI chassis through the PXI bus, a clock unit connected with the FPGA digital signal processing unit, a memory unit connected with the power supply unit, the FPGA digital signal processing unit and the clock unit, a DA conversion unit connected with the FPGA digital signal processing unit and the clock unit, and a signal conditioning unit connected with the DA conversion unit, wherein the signal conditioning unit and the L-band dual-channel up-conversion module are used for baseband signal output.
Preferably, the L-band dual-channel up-conversion module includes a conversion circuit connected to the signal conditioning unit to convert baseband signal input, two modulation circuits connected to the conversion circuit, and a switch connected to the two modulation circuits, where each of the two modulation circuits includes an IQ modulator connected to the conversion circuit and an amplification and attenuation signal conditioning module connected to the switch, and one of the modulation circuits further includes a switch filter network.
Preferably, the modulation circuit with the switch filter network corresponds to modulation frequency conversion, filtering and amplification attenuation of 100MHz-2GHz signals; the other group of modulation circuits corresponds to modulation frequency conversion, filtering, amplification and attenuation of 150KHz-100MHz signals, and the two groups of modulation circuits are combined through a switch and then uniformly output 50KHz-2GHz signals.
Preferably, the L-band dual-channel up-conversion module further includes a DDS for reference signal input, and a reference signal processing unit connected to the DDS, and the reference signal processing unit is configured to transmit the processed reference signal to the two IQ modulators.
Preferably, the radio frequency switch network comprises a dual-channel SP2T switch module and a dual-channel SP6T switch module which are connected in sequence, and the dual-channel SP2T switch module and the dual-channel SP6T switch module are respectively connected with the dual-channel conditioning board card.
Preferably, the dual-channel conditioning board card comprises a signal conditioning module and a filtering module, wherein the signal conditioning module is respectively connected with the L-band dual-channel up-conversion module, the dual-channel SP2T switch module, and the filtering module is connected with the dual-channel SP6T switch module.
The invention has the beneficial effects that:
1. the invention is in modularized integrated design, and realizes online debugging of analog signals by using upper computer programming control.
2. The maintenance of the simulation equipment is convenient, and the rapid repair of the equipment is met through software self-checking and module replacement.
3. And a computer control technology is adopted, so that the expansion and function upgrade of the simulator are facilitated.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the high-speed baseband board card according to the present invention;
FIG. 3 is a schematic structural component view of an L-band dual-channel up-conversion board card according to the present invention;
FIG. 4 is a block diagram of the combination structure of the RF switch network and the dual-channel conditioning board card of the present invention;
fig. 5 is a flow chart of the operation of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further explained in the following with the accompanying drawings and the embodiments.
As shown in fig. 1 to 5, a combined programmable radio beacon simulator is a modular instrument in the form of a PXI/3U standard interface, and needs to be used in cooperation with a PXI chassis, a controller and the like, and the overall composition block diagram is shown in fig. 1, and mainly includes an 8-slot PXI chassis, a controller, a high-speed baseband module, an L-band dual-channel up-conversion module, a radio frequency switch network and a dual-channel signal conditioning board card.
As shown in fig. 2, the high-speed baseband module is composed of a two-channel 1.25GS/s, 16-bit da circuit. The device mainly comprises an FPGA digital signal processing unit, a signal conditioning unit, a memory unit, a clock unit, a DA conversion unit and the like. The FPGA digital signal processing unit is connected with the PXI case through a PXI bus, the memory unit is respectively connected with the FPGA digital signal processing unit and the power supply unit, the clock unit is respectively connected with the FPGA digital signal processing unit, the memory unit and the DA conversion unit, and the signal conditioning unit is connected with the DA conversion unit. The high-speed baseband module has two paths of DA outputs, and IQ baseband source output can be completed simultaneously through the two paths of DA. The baseband signal generator has two core units, namely an FPGA unit and a power supply unit. The DA sampling rate and the processing speed of the FPGA are high enough, so that the bandwidth of various vector signals can be ensured. The resolution of the DA is chosen to be 16 bits, so that the precision of the vector signal modulation is enough.
As shown in fig. 3, the L-band dual-channel up-conversion module is connected to the chassis controller through a PXI bus interface, and is connected to the signal conditioning unit, a conversion circuit for converting baseband signal input, a DDS for reference signal input, two modulation circuits connected to the conversion circuit, a reference signal processing unit connected to the DDS, and a switch connected to the two modulation circuits. The two groups of modulation circuits comprise IQ modulators connected with the conversion circuit and amplification attenuation signal conditioning modules connected with the switches, the amplification attenuation signal conditioning modules are connected with the IQ modulators, and the switches are connected with the dual-channel signal conditioning board cards.
And a switch filter network is also arranged in one group of modulation circuits. The modulation circuit with the switch filter network corresponds to modulation frequency conversion, filtering and amplification attenuation of 100MHz-2GHz signals; the other group of modulation circuits corresponds to modulation frequency conversion, filtering and amplification attenuation of 150KHz-100MHz signals.
The working process of the L-waveband double-channel up-conversion module is as follows: and a reference signal input from the outside enters the DDS, the DDS outputs a high-precision reference signal to drive the phase-locked loop to work, a high-step broadband frequency source is obtained, the high-step broadband frequency source is amplified and attenuated to obtain modulated driving power, and a local oscillator carrier signal is provided for the modulator. The baseband signal input form is IQ single-ended signal, and double-path single-ended conversion difference and power division conversion are carried out in the module to obtain 2-path IQ signals. When the up-conversion module outputs a 100MHz-2GHz signal, the baseband signal is directly introduced into the IQ modulator, is output after IQ modulation, and is output after the IQ modulation, a large amount of harmonic waves generated by the low-frequency band modulation of the IQ modulator are filtered in sections through a switch filter network, and then enter a switch through an amplification attenuation signal conditioning module;
when the up-conversion module outputs 150KHz-100MHz signal, the baseband signal is directly passed through IQ modulator, and output after IQ modulation, and directly passed through the amplification attenuation signal conditioning module and fed into the switch.
The 100MHz-2GHz signal and the 150KHz-100MHz signal are combined by a switch to output 150KHz-2GHz signal.
As shown in fig. 4, the diagram is a combined block diagram of a radio frequency switch network and a dual-channel signal conditioning board, where the radio frequency switch network and the dual-channel signal conditioning board mainly further process a frequency-converted simulator signal to meet a test requirement of a simulator. The system comprises a signal conditioning module, a dual-channel SP2T switch module, a dual-channel SP6T switch module, a filtering module and the like. The signal conditioning module and the filtering module form a dual-channel signal conditioning board card, and the dual-channel SP2T switch module and the dual-channel SP6T switch module form a radio frequency switch network. The signal conditioning module is used for amplifying and attenuating the frequency-converted signal so as to improve the dynamic range of signal output; the filtering module is used for filtering stray interference signals so as to improve the signal-to-noise ratio and improve the test performance; the dual-channel SP2T switch module and the dual-channel SP6T switch module are used for switching various analog signals, so that the simulator can multiplex an output port, the physical size of the whole machine is reduced, and the multiplexing efficiency of the interface is improved.
The invention has the following use flow and working principle:
when in use, the controller is responsible for display, module control, signal simulation and data uploading and downloading, as shown in fig. 5. The FPGA inside the high-speed baseband module respectively controls respective DA to complete the generation of the waveform of the required baseband signal, the baseband signal is respectively output from the high-speed baseband module after the power of the FPGA is adjusted by the signal conditioning unit, then the baseband signal is sent to the L-band dual-channel up-conversion module, IQ up-conversion processing is completed inside the L-band dual-channel up-conversion module to obtain the required radio-frequency signal, certain filtering and power processing are performed by the filtering unit and the signal conditioning unit and then the radio-frequency signal is respectively transmitted, the transmission of the simulated ground beacon signal is jointly completed, and the simulation function of the beacon signal is realized.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A combined programmable radio beacon simulator comprises a PXI case and a controller, and is characterized in that: further comprising:
the high-speed baseband module consists of a dual-channel 1.25GS/s and 16bit DA circuit, has two paths of DA outputs and can simultaneously complete IQ baseband source output;
the L-band dual-channel up-conversion module is connected with the PXI case and the controller by adopting a PXI bus and is used for modulating, converting, filtering, amplifying and attenuating the baseband signals output from the high-speed baseband module and outputting the baseband signals;
the radio frequency switch network is used for completing the switching of various analog signals, so that the simulator can multiplex the output port;
and the two-channel conditioning board card is respectively connected with the L-waveband two-channel up-conversion module and the radio frequency switch network and is used for amplifying and attenuating the frequency-converted signals and filtering stray interference signals.
2. A combined programmable radio beacon simulator according to claim 1, in which: the high-speed baseband board card comprises an FPGA digital signal processing unit connected with a PXI case through a PXI bus, a clock unit connected with the FPGA digital signal processing unit, a memory unit connected with a power supply unit, the FPGA digital signal processing unit and the clock unit, a DA conversion unit connected with the FPGA digital signal processing unit and the clock unit, and a signal conditioning unit connected with the DA conversion unit, wherein the signal conditioning unit and an L-waveband dual-channel up-conversion module are used for outputting baseband signals.
3. A combined programmable radio beacon simulator according to claim 2, in which: the L-band dual-channel up-conversion module comprises a conversion circuit connected with the signal conditioning unit to convert baseband signal input, two groups of modulation circuits connected with the conversion circuit and a switch connected with the two groups of modulation circuits, wherein each group of modulation circuits comprises an IQ modulator connected with the conversion circuit and an amplification attenuation signal conditioning module connected with the switch, and a switch filter network is further arranged in one group of modulation circuits.
4. A combined programmable radio beacon simulator according to claim 3, in which: the modulation circuit with the switch filter network corresponds to modulation frequency conversion, filtering and amplification attenuation of 100MHz-2GHz signals; the other group of modulation circuits corresponds to modulation frequency conversion, filtering, amplification and attenuation of 150KHz-100MHz signals, and the two groups of modulation circuits are combined through a switch and then uniformly output 50KHz-2GHz signals.
5. A combined programmable radio beacon simulator according to claim 3, in which: the L-band dual-channel up-conversion module further comprises a DDS used for inputting a reference signal and a reference signal processing unit connected with the DDS, and the reference signal processing unit is used for transmitting the processed reference signal to the two IQ modulators.
6. A combined programmable radio beacon simulator according to claim 1, in which: the radio frequency switch network comprises a double-channel SP2T switch module and a double-channel SP6T switch module which are sequentially connected, wherein the double-channel SP2T switch module and the double-channel SP6T switch module are respectively connected with the double-channel conditioning board card.
7. The combined programmable radio beacon simulator of claim 6, wherein: the dual-channel conditioning board card comprises a signal conditioning module and a filtering module, wherein the signal conditioning module is respectively connected with the L-waveband dual-channel up-conversion module, the dual-channel SP2T switch module, and the filtering module is connected with the dual-channel SP6T switch module.
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| CN202110999087.8A CN113820975A (en) | 2021-08-28 | 2021-08-28 | Combined programmable radio beacon simulator |
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| CN202110999087.8A CN113820975A (en) | 2021-08-28 | 2021-08-28 | Combined programmable radio beacon simulator |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1313339A1 (en) * | 2001-10-23 | 2003-05-21 | Telefonica, S.A. | UTMS radio beacon equipment |
| CN103576168A (en) * | 2012-08-08 | 2014-02-12 | 深圳中冀联合科技股份有限公司 | Beidou satellite signal simulator and implementation method thereof |
| CN104767560A (en) * | 2015-05-06 | 2015-07-08 | 中国科学院遥感与数字地球研究所 | Portable dual-channel testing modulation device and modulation method thereof |
| CN107976701A (en) * | 2017-11-20 | 2018-05-01 | 中国电子科技集团公司第四十研究所 | Multimode navigation simulator flow for dynamic reconfigurable system and method based on bus architecture |
| CN108333958A (en) * | 2017-12-29 | 2018-07-27 | 北京航天测控技术有限公司 | A kind of multiplexing shape General Aviation Simulator |
| CN108827272A (en) * | 2018-06-15 | 2018-11-16 | 中国电子科技集团公司第四十研究所 | Telecompass signal imitation device and method based on PXI bus |
| CN112684716A (en) * | 2020-11-25 | 2021-04-20 | 广州斯达尔科技有限公司 | Aviation radio comprehensive test equipment and control method |
-
2021
- 2021-08-28 CN CN202110999087.8A patent/CN113820975A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1313339A1 (en) * | 2001-10-23 | 2003-05-21 | Telefonica, S.A. | UTMS radio beacon equipment |
| CN103576168A (en) * | 2012-08-08 | 2014-02-12 | 深圳中冀联合科技股份有限公司 | Beidou satellite signal simulator and implementation method thereof |
| CN104767560A (en) * | 2015-05-06 | 2015-07-08 | 中国科学院遥感与数字地球研究所 | Portable dual-channel testing modulation device and modulation method thereof |
| CN107976701A (en) * | 2017-11-20 | 2018-05-01 | 中国电子科技集团公司第四十研究所 | Multimode navigation simulator flow for dynamic reconfigurable system and method based on bus architecture |
| CN108333958A (en) * | 2017-12-29 | 2018-07-27 | 北京航天测控技术有限公司 | A kind of multiplexing shape General Aviation Simulator |
| CN108827272A (en) * | 2018-06-15 | 2018-11-16 | 中国电子科技集团公司第四十研究所 | Telecompass signal imitation device and method based on PXI bus |
| CN112684716A (en) * | 2020-11-25 | 2021-04-20 | 广州斯达尔科技有限公司 | Aviation radio comprehensive test equipment and control method |
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