CN202940800U - High-orbit remote-sensing satellite-demodulation signal processing platform - Google Patents
High-orbit remote-sensing satellite-demodulation signal processing platform Download PDFInfo
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- CN202940800U CN202940800U CN 201220679484 CN201220679484U CN202940800U CN 202940800 U CN202940800 U CN 202940800U CN 201220679484 CN201220679484 CN 201220679484 CN 201220679484 U CN201220679484 U CN 201220679484U CN 202940800 U CN202940800 U CN 202940800U
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Abstract
The utility model discloses a high-orbit remote-sensing satellite-demodulation signal processing platform and relates to the technology field of high-speed data-signal demodulation processing of a high-orbit remote-sensing satellite gateway station. The high-orbit remote-sensing satellite-demodulation signal processing platform provided by the utility model comprises an intermediate-frequency simulation receiving module and an AD conversion module, wherein the intermediate-frequency simulation receiving module receives intermediate frequency signals and sends the intermediate frequency signals to the AD conversion module, and the AD conversion module comprises a plurality of parallel and independent AD conversion channels and is connected with a digital down converter. The digital down converter is connected with an FPGA module. One AD conversion channel in the AD conversion module is connected with the FPGA module. The FPGA module is connected with a VPX bus interface. Because the VPX interface is used to support high-speed data transmission in the high-orbit remote-sensing satellite-demodulation signal processing platform provided by the utility model, timely processing of the high-speed digital signals is convenient and the signal processing platform can satisfy requirements of military and aviation embedded-type computing systems.
Description
Technical field
The utility model relates to high rail remote sensing satellite gateway station high-speed data signal demodulation process technical field, particularly a kind of high rail remote sensing satellite demodulation signal processing platform.
Background technology
Remote sensing technology, occupy an important position in carrying out national biological environment control, water resources management, mineral resources management, forest inventory control, Land Resources Management, military struggle, national defense safety and all kinds of scientific research, the development of many scientific domains more and more depends on the progress of remote sensing technology and the acquisition capability of remotely-sensed data, the breakthrough in the forward position of the many research of geoscience in other words more and more be unable to do without the development of the new technology such as remote sensing.All remote sensing satellites need that all the remote sensing satellite gateway station is arranged, and one of its effect is reception, processing and file satellite remote sensing date.The view data that satellite obtains arrives ground station by radio wave transmissions.Satellite earth receiving station is set up with huge input in countries in the world, and remote sensing satellite grounded receiving station distribution operation conditions will determine scientific research in the ability of many Disciplinary Frontiers Remarkable Progress On Electric Artificials, determines the scientific and technical competitiveness of country.
The remote sensing satellite that is moving, the remote sensing image data transmission rate is respectively between 60Mbps-100Mbps, 100Mbps-320Mbps, the remote sensing satellite image message transmission rate of a new generation will surpass 800Mbps, so just ground receiving demodulation system has been proposed very high specification requirement: one side remote sensing satellite in orbit increases rapidly, requires ground receiving demodulation system to have the remote sensing satellite signal that can receive multiple speed, more modulation standard; On the other hand, the image data transmission rate of remote sensing satellite improves constantly along with the enhancing of image resolution ratio.
Existing remote sensing satellite demodulator in the world at present can only be processed simultaneously the signal of a remote sensing satellite, and the circuit structure of employing is: 1, adopt simulation Costas ring to extract coherent carrier; 2, for specific bit synchronizer of characteristic Design of each remote sensing satellite, comprise specific baseband filtering, Clock Extraction, the functional units such as sampling judgement regeneration, differential decoding and serial to parallel conversion, select at last data and the clock output of required bit synchronizer with switch, can hold at most 6 specific bit synchronizers.
The said equipment has following shortcoming: at first, the simulation Costas demodulation process loop under high intermediate frequency, broadband is high to function and the performance requirement of circuit, causes circuit stability poor; Secondly, need the bit synchronizer of a plurality of custom-mades during work, make the system expandability poor, its range of application is restricted; The 3rd is that the equipment and the components and parts use amount that repeat to arrange are large, makes equipment cost high, and expensive, power consumption is large, reliability is low etc.
The utility model content
The purpose of this utility model is: for existing above-mentioned deficiency in prior art, provide a kind of high rail remote sensing satellite demodulation signal processing platform that can process simultaneously a plurality of high rail remote sensing satellite gateway station high-speed data signals.
To achieve these goals, the utility model provides following technical scheme:
a kind of high rail remote sensing satellite demodulation signal processing platform, this processing platform comprises intermediate frequency simulation receiver module, the AD modular converter, described intermediate frequency simulation receiver module receiving intermediate frequency signal, and this intermediate-freuqncy signal is sent to the AD modular converter, described AD modular converter comprises a plurality of parallel, AD ALT-CH alternate channel independently, described AD modular converter is connected with digital down converter (hereinafter to be referred as DDC), described DDC is connected with FPGA(Field Programmable Gate Array, field programmable gate array) module, there is an AD ALT-CH alternate channel to be connected in the FPGA module in described AD modular converter, described FPGA module is connected with the VPX bus interface.DDC and the input control interconnection that comprises DDC being connected of FPGA module, output signal interconnection and control signal interconnection; DDC is used for wideband digital intermediate frequency software radio receiver, completes the functions such as Digital Down Convert, data pick-up.
As preferred version of the present utility model, in above-mentioned high rail remote sensing satellite demodulation signal processing platform, described FPGA module is connected with DSP(Digital Signal Processor, Digital Signal Processing by the mode of direct-current coupling) module.
As preferred version of the present utility model, in above-mentioned high rail remote sensing satellite demodulation signal processing platform, described FPGA module is connected with disk array with computer by the VPX bus interface.
As preferred version of the present utility model, in above-mentioned high rail remote sensing satellite demodulation signal processing platform, between described FPGA module and described VPX bus interface by LVTTL(Low Voltage Transistor-Transistor Logic) be connected, wherein, described FPGA module and VPX bus interface have eight single-ended LVTTL pin direct interconnection, and two single-ended LVTTL pins and serial ports control chip MAX3232 interconnection realize that the two-way serial ports is connected to the VPX bus interface.
As preferred version of the present utility model, in above-mentioned high rail remote sensing satellite demodulation signal processing platform, described AD modulus of conversion adopts the mode of direct-current coupling to be connected with DDC.
The operation principle of the high rail remote sensing satellite of the utility model demodulation signal processing platform: at first, remote sensing satellite transmits, intermediate frequency simulation receiver module receives the analog intermediate frequency signal of satellite launch, this analog signal is through the AD modular converter of 14, arrive again special-purpose digital down converter DDC, then be sent to successively FPGA module, DSP module, and result delivered to corresponding processor by the VPX bus interface process.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
1, due in the high rail remote sensing satellite of the utility model demodulation signal processing platform, use VPX interface support transfer of data at a high speed, be convenient to the timely processing of high-speed digital signal, and can satisfy needs military, the aviation embedded computing system, the design of back-up system level has solved mission computer and has used the lot of challenges that faces.
2, owing to having adopted a plurality of parallel independently AD passages in the high rail remote sensing satellite of the utility model demodulation signal processing platform, can receive simultaneously the different intermediate-freuqncy signal of multichannel.
Description of drawings:
Fig. 1 is the principle schematic of the high rail remote sensing satellite of the utility model demodulation signal processing platform.
Fig. 2 is the catenation principle figure of FPGA module and VPX bus interface in the high rail remote sensing satellite of the utility model demodulation signal processing platform.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Embodiment
A kind of high rail remote sensing satellite demodulation signal processing platform, as shown in Figure 1, this processing platform comprises intermediate frequency simulation receiver module, AD modular converter and VPX bus interface, described intermediate frequency simulation receiver module receiving intermediate frequency signal, and this intermediate-freuqncy signal is sent to the AD modular converter; The AD modular converter adopts the AD6645 of ADI company as the analog sampling chip, the maximum sample rate of 105MSPS, the sampling bandwidth of 0-200MHz, the data transaction figure place of 14.
Described AD modular converter comprises 5 AD ALT-CH alternate channels, and described AD modular converter is connected with digital down converter (hereinafter to be referred as DDC), and described DDC is connected with the FPGA module, has a passage to be connected in the FPGA module in described AD modular converter; The FPGA module adopts the FPGA processor of XILINX company, FPGA processor integrated programmable logic chip XC5VLX110T, this device adopts advanced 65nm explained hereafter, the DDR II SDRAM memory of 2GB is provided, the 550MHz clock rate, the DSP48E stone of precision 25X18 position, the QDR SRAM memory of 1.25Gbps difference I/O and the single-ended I/O of 800Mbps is as data cache.
Described AD modulus of conversion adopts the mode of direct-current coupling to be connected with DDC; Described DDC and the input control interconnection that comprises DDC being connected of FPGA module, output signal interconnection and control signal interconnection; DDC is used for wideband digital intermediate frequency software radio receiver, completes the functions such as Digital Down Convert, data pick-up.DDC adopts the ISL5416 of InterSil company, the maximum input data transfer rate of 95MSPS, 4 passage 16 bit digital fixed points, 17 floating-point inputs, the digital Auto Gain of 96dB.
Described FPGA module is connected with the DSP module by the mode of direct-current coupling; DSP selects the TMS320C6455 of TI company, and the dominant frequency maximum can be operated in 1.2GHz, and the DDR2-533 SDRAM memory of 2Gb adopts the 8bit pattern, and the FLASH memory of 128Mb is mainly used in computing, the analyzing and processing of digital signal.Switching network by FPGA and DSP can make data-signal and global network carry out synchronous exchange.
Described FPGA module is connected in the VPX bus interface; VPX bus Universal Signal Processor plateform system is that a cover adopts the VITA46 standard, based on the system for real-time signal processing of the mutual backboard of high speed serialization.Its operation processing unit is based on the fpga chip of Xilinx, realized standardization, modularization, can expand, reconfigurable radar real-time digital signal processing system platform, keeps 3U, 6U and 12U specification, supports PMC and XMC subcard.The VPX interface adopts the product of military hardened system, standard can satisfy needs military, the aviation embedded computing system, and the design of back-up system level has solved mission computer and has used the lot of challenges that faces.The VPX interface has more I/O port, supports transfer of data at a high speed, is fit to the timely processing of high-speed digital signal, and disposal ability can be expanded, and external interface is replaceable.Anti-seismic performance reaches at present very high level, and cost, volume and weight relative reduce are many.
As shown in Figure 2, described FPGA module is connected with disk array with computer by the VPX bus interface.Between FPGA and VPX bus interface by 3.3V LVTTL(Low Voltage Transistor-Transistor Logic) be connected, FPGA and VPX have eight single-ended LVTTL pin direct interconnection, also have two single-ended LVTTL pins and serial ports control chip MAX3232 interconnection to realize that the two-way serial ports is connected to VPX.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. one kind high rail remote sensing satellite demodulation signal processing platform, this processing platform comprises intermediate frequency simulation receiver module, AD modular converter, it is characterized in that, described intermediate frequency simulation receiver module receiving intermediate frequency signal, and this intermediate-freuqncy signal is sent to the AD modular converter, described AD modular converter comprises a plurality of parallel, AD ALT-CH alternate channels independently, described AD modular converter is connected with digital down converter, described digital down converter is connected with the FPGA module, has an AD ALT-CH alternate channel to be connected in the FPGA module in described AD modular converter; Described FPGA module is connected with the VPX bus interface.
2. high rail remote sensing satellite demodulation signal processing platform according to claim 1, is characterized in that, described FPGA module is connected with the DSP module by the mode of direct-current coupling.
3. high rail remote sensing satellite demodulation signal processing platform according to claim 2, is characterized in that, described FPGA module is connected with disk array with computer by the VPX bus interface.
4. high rail remote sensing satellite demodulation signal processing platform according to claim 3, it is characterized in that, be connected by LVTTL between described FPGA module and described VPX bus interface, wherein, described FPGA module and VPX bus interface have eight single-ended LVTTL pin direct interconnection, and two single-ended LVTTL pins and the interconnection of serial ports control chip realize that the two-way serial ports is connected to the VPX bus interface.
5. high rail remote sensing satellite demodulation signal processing platform according to claim 1, is characterized in that, described AD modulus of conversion adopts the mode of direct-current coupling to be connected with digital down converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220679484 CN202940800U (en) | 2012-12-11 | 2012-12-11 | High-orbit remote-sensing satellite-demodulation signal processing platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220679484 CN202940800U (en) | 2012-12-11 | 2012-12-11 | High-orbit remote-sensing satellite-demodulation signal processing platform |
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| CN202940800U true CN202940800U (en) | 2013-05-15 |
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| CN 201220679484 Expired - Fee Related CN202940800U (en) | 2012-12-11 | 2012-12-11 | High-orbit remote-sensing satellite-demodulation signal processing platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559088A (en) * | 2016-11-16 | 2017-04-05 | 天津汉铭科技发展有限公司 | Low rail high definition Remote Sensing Image Processing System |
| CN106952256A (en) * | 2017-03-21 | 2017-07-14 | 哈尔滨工业大学 | Optical remote satellite image quality lifts all-around test stand |
-
2012
- 2012-12-11 CN CN 201220679484 patent/CN202940800U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559088A (en) * | 2016-11-16 | 2017-04-05 | 天津汉铭科技发展有限公司 | Low rail high definition Remote Sensing Image Processing System |
| CN106952256A (en) * | 2017-03-21 | 2017-07-14 | 哈尔滨工业大学 | Optical remote satellite image quality lifts all-around test stand |
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