CN206684303U - A kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks - Google Patents

A kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks Download PDF

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Publication number
CN206684303U
CN206684303U CN201720313759.4U CN201720313759U CN206684303U CN 206684303 U CN206684303 U CN 206684303U CN 201720313759 U CN201720313759 U CN 201720313759U CN 206684303 U CN206684303 U CN 206684303U
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circuit
soc
signal
circuits
gnss
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CN201720313759.4U
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张沛尧
王超
杨荣仕
刘强
王杰俊
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SHANGHAI SHUANGWEI GUIDANCE TECHNOLOGIES Co Ltd
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SHANGHAI SHUANGWEI GUIDANCE TECHNOLOGIES Co Ltd
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Abstract

The utility model provides a kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks, and the structure mainly includes SOC processor modules, platform hardware basic resource module and input/output interface module.GNSS receiver baseband hardware circuit platform provided by the utility model based on SOC frameworks causes existing GNSS receiver to open the interface bottleneck of the reception processing the whole world available numerous transmission of GNSS satellite signal data, processing and diversification, adapts to the needs that present GNSS development is used multimode multi-frequency satellite-signal with user.Circuit structure is simple and practical, powerful, convenient and swift using process, stable and reliable working performance, and the scope of application is relatively broad.

Description

A kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks
Technical field
GNSS navigational satellite receiver application fields are the utility model is related to, more particularly to a kind of GNSS based on SOC is defended The baseband hardware platform circuit structure of star signal transacting.
Background technology
GNSS (Global Navigation Satellite System) is that one kind utilizes satellite emission signal, earth table The receiver reception signal of face or near floor level measures the GLONASS of the position of observation thing and the information such as time. GNSS satellite signal include Beidou satellite navigation system (BDS), the U.S. GPS, Russia GLONASS, Europe GALILEO, and related strengthening system, the EGNOS of WAAS (WAAS), Europe such as the U.S. (are geostationary led in Europe Navigate overlapping system) and Japanese MSAS (Multi-functional transporting Satellite Augmentation System) etc., it is also contemplated by building and its that to be built later His satellite navigation system.
Wherein BDS, GPS and GALILEO signal are synthesized using typical CDMA (CDMA) modulation technique, GLONASS signal is synthesized using frequency division multiple access (FDMA) modulation technique, and its complete signal mainly includes carrier wave, pseudo noise code sum According to three kinds of components such as code.BDS signal carriers are denoted as B1 (1561.098MHz), B2 (1207.14MHz) and B3 respectively (1268.52MHz).Gps signal carrier wave is denoted as L1 (1575.42MHz), L2 (1227.6MHz) and L5 (1176.45MHz) respectively. GLONASS signal carrier wave is denoted as G1 (1602MHz), G2 (1246MHz) respectively.GALILEO signal carriers are denoted as E1 respectively (1589.74MHz), E2 (1561.1MHz), E5a (1176.45MHz), E5b (1207.14MHz) and E6 (1278.75MHz).Altogether Four systems, 13 frequencies are counted, each satellite of each satellite system is launched on respective two or three carrier frequencies Broadcast ranging code and navigation information.After radio-frequency channel has received all signals, baseband circuit platform signal is carried out signal it is related, Capture, tracking, navigation message parsing, positioning calculation and RTK (Real-time kinematic, carrier phase difference technology) High accuracy resolves, and original observed data, RTK, PPP (precise point positioning, Static Precise Point Positioning) is fixed Position result data output.
In the prior art, it is that the platform that have selected separate type is put down as GNSS receiver base band to have a kind of design Platform, 1 MCU core is added using 1 FPGA (Field-Programmable Gate Array, field programmable gate array) chip Piece (MCU includes ARM or DSP here, is collectively referred to as MCU below), both are placed on the same of receiver with absolute version Circuit board cooperating, typically using EMIF (external memory storage connecting interface), the processing to GNSS intermediate-freuqncy signals is completed, wherein Fpga chip mainly completes related, capture, tracking, and MCU chip completes control to FPGA, navigation message parsing, positioning calculation With resolving etc. in high precision, data output interface includes UART (Universal Asynchronous Receiver/ Transmitter, universal asynchronous receiving-transmitting transmitter), USB, 10M Ethernet, do not possess massive store function.
It is about 9 to 10 that each satellite system, which has the average satellites in view of multiple satellites, if by 13 frequencies altogether Point calculates, then the data volume that FPGA is transferred to MCU is very huge, then the requirement to real-time due to GNSS receiver Height, during using separate type platform, the transmission data between two chips have been referred to as a bottleneck, cause existing GNSS receiver Comprehensive multisystem reception processing can not be realized, and with compatible multiple external equipments interface.
Utility model content
In view of current GNSS navigational satellite receivers field above shortcomings, the utility model provides one kind can be effective Solves the satellite environment of existing GNSS multisystems, the GNSS with a variety of data communication interface forms and massive store function connects Receipts machine baseband hardware circuit structure, concrete scheme are as follows：
The utility model provides a kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks, The structure includes SOC processor modules, platform hardware basic resource module and input/output interface module；
The SOC processor modules include PLPL (Programmable Logic, FPGA) processor, PS (Processing System, processor system) dual core processor, PS dual core processors include PS-A kernels and PS-B kernels；
Platform hardware basic resource module includes Nor Flash circuit units, communication circuit units, exented memory circuit list Member, memory circuit cells and OCXO clock circuit units；
Input/output interface module include external event input signal circuit unit, pps pulse per second signal output circuit unit, UART circuitry unit, SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) circuit caused by PL processors Unit, RTC (Real-Time Clock, real-time clock) circuit unit, TCXO (Temperature Compensated Crystal Oscillator, temperature compensating crystal oscillator) unit, IIC (Inter-Integrated Circuit, integrate Circuit bus) interface circuit unit, CAN (Control Area Network, controller LAN) interface circuit unit, USB UART interface circuit unit and ethernet circuit unit caused by interface circuit unit, PS dual core processors；
SOC processor modules receive GNSS intermediate-freuqncy signals caused by external radio frequency circuit, after PL processors are handled Be output to PS-B kernels, in PS-B verification GNSS signal text initial data parsed, GNSS positioning calculations and high precision solution Calculate and produce GNSS satellite initial data and positioning after be transferred to PS-A kernels, PS-A kernels output data to input and output Interface module, output is carried out by input/output interface module and carries out data interaction communication with peripheral apparatus.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, using LPDDR2 (Low Power Double Data Rate) internal memory is as exented memory circuit unit, using EMMC (Embedded Multi Media Card) memory passes through original observed data, RTK, PPP positioning result data defeated as memory circuit cells Enter output interface module to be exported；
The LPDDR2 memory data interfaces are 32bit, a width of 10bit of address bit.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, SOC processor dies Block is single SOC, and GNSS baseband signals are handled using PL processors, and GNSS data resolves and uses PS dual core processors, PL Data interaction is carried out using the AXI_ACP communication buses inside SOC between processor and PS dual core processors.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, TCXO units/ OCXO clock circuits unit is used to when producing local and exported give PL processors, the clock as the reproduction of GNSS signal local zone time Source.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, memory circuit cells Use SDIO communication interface circuits between SOC processor modules, storage content includes the application program and GNSS of receiver Application data.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, communication circuit units Include WiFi/BT chip circuits, Bluetooth antenna circuit, WiFi antenna circuits, communication work state ON-OFF control circuit and numeral Communication interface SDIO circuits.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, Nor Flash electricity Road unit includes Nor Flash circuits and QSPI operating mode circuits, and Nor Flash are used for the BOOT programs for completing baseband platform Storage.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, ethernet circuit list Member includes ethernet physical layer transmission circuit, network clocking circuit, and the MIO of ethernet physical layer transmission circuit and PS-B kernels connects Mouth connection, by nuclear control networked physics layer circuit in PS-B；
Ethernet circuit unit externally provides the data transmission interface of 10M and 100M speed.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, PS dual core processors Caused UART interface circuit unit has short circuit/electrostatic discharge protective circuit, and the short circuit/electrostatic discharge protective circuit is by the electricity of RS232 all the way Road and all the way LVTTL circuits form, RS232 circuit bag LVTTL-1.8V transfer standard RS232 circuits, LVTTL circuits by LVTTL-1.8V turns LVTTL-3.3V circuits, has short-circuit protection and electrostatic discharge protective circuit.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, usb circuit Unit is made up of USB transmission circuits and USB-HUBR circuit units, and USB transmission circuits are used to realize the logical of PS dual core processors Switch to USB OTG interfaces with universal serial bus, it is multiple usb circuits that USB-HUBR circuit units, which are used for a usb expansion,.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, CAN interface circuit The LVTTL-1.8V signals of PS-A kernels are converted to LVTTL-3.3V signals by unit, then will using RS485 level shifting circuits Signal switchs to differential signal.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, IIC interface circuits Unit includes IIC interface clocks, data-signal protection circuit and drive circuit, is externally the IIC communication interfaces of standard, for even Connect peripheral hardware IIC interface main equipments.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, TCXO units include Power supply stabilization circuit and clock amplifier circuit, power supply stabilization circuit provide the direct current of 1.8v low noise all the way for TCXO units Source, TCXO units are produced clock signal and carry out shaping amplification by clock amplifier circuit, when being then output to PS dual core processors and doing Zhong Yuan.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, RTC circuit unit Comprising RTC power circuits and RTC clock circuit, RTC power circuits include RTC power charging circuits and discharge circuit, RTC clock Circuit includes data transmission circuit and the time interrupts generation circuit.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, SPI circuit unit Input signal produced by PL processors.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, external event input Signal circuit unit includes：
External signal input detecting circuit unit, for being detected to external signal；
Signal transformation circuit unit, for carrying out shaping filter to signal；
Electrostatic discharge protective circuit unit, for protection circuit signal.
A kind of GNSS satellite receiver baseband hardware platform circuit structure of above-mentioned SOC frameworks, wherein, pps pulse per second signal is defeated Go out pulse-generating circuit unit, signal drive circuit unit and short-circuit protection circuit unit that circuit unit includes being in series, arteries and veins Generation circuit output LVTTL-1.8V square-wave signal is rushed, signal drive circuit unit is put to the signal of pulse-generating circuit Greatly, comprising voltage amplification and Current amplifier, it is then delivered to short-circuit protection circuit unit and externally exports.
A kind of GNSS receiver baseband hardware circuit design one kind of SOC frameworks provided by the utility model is by gps satellite Signal is converted to the circuit structure of baseband signal, and the big data quantity transmission that can effectively solve GNSS multimode multi-frequency channel signals is asked Topic, powerful hardware foundation resource, the hardware circuit size that reduces, abundant outbound data communication interface, circuit structure are simple and practical.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, the utility model and its spy Sign, profile and advantage will become more apparent upon.The identical mark instruction identical part in whole accompanying drawings.Not deliberately according to Ratio draws accompanying drawing, it is preferred that emphasis is shows purport of the present utility model.
Fig. 1 is a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks provided by the utility model Figure.
Embodiment
In the following description, a large amount of concrete details are given more thoroughly to manage the utility model to provide Solution.It is, however, obvious to a person skilled in the art that the utility model can be without one or more of these thin Save and be carried out.In other examples, in order to avoid obscuring with the utility model, for more well known in the art Technical characteristic is not described.
In order to thoroughly understand the utility model, detailed step and detailed structure will be proposed in following description, To explain the technical solution of the utility model.Preferred embodiment of the present utility model is described in detail as follows, but except these Outside being described in detail, the utility model can also have other embodiment.
The utility model provides a kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks, The structure includes SOC processor modules, platform hardware basic resource module and input/output interface module.Specifically,
The SOC processor modules include PL processors, PS dual core processors, PS dual core processors include PS-A kernels and PS-B kernels；
Platform hardware basic resource module includes Nor Flash circuit units, communication circuit units, exented memory circuit list Member, memory circuit cells and OCXO clock circuit units；
Input/output interface module include external event input signal circuit unit, pps pulse per second signal output circuit unit, UART circuitry unit caused by PL processors, SPI circuit unit, RTC circuit unit, TCXO units, IIC interface circuits unit, CAN interface circuit unit, usb circuit unit, UART interface circuit unit caused by PS dual core processors and Ethernet electricity Road unit；
SOC processor modules receive GNSS intermediate-freuqncy signals caused by external radio frequency circuit, after PL processors are handled Be output to PS-B kernels, in PS-B verification GNSS signal text initial data parsed, GNSS positioning calculations and high precision solution Calculate and produce GNSS satellite initial data and positioning after be transferred to PS-A kernels, PS-A kernels output data to input and output Interface module, output is carried out by input/output interface module and carries out data interaction communication with peripheral apparatus.
In the optional embodiment of the utility model one, using LPDDR2 internal memories as exented memory circuit unit, use EMMC memories are connect as memory circuit cells, and original observed data, RTK, PPP positioning result data by input and output Mouth mold block is exported.Optionally, the LPDDR2 memory data interfaces are 32bit, a width of 10bit of address bit.
In the optional embodiment of the utility model one, SOC processor modules are single SOC, GNSS baseband signals Handled using PL processors, GNSS data resolves and uses PS dual core processors, is used between PL processors and PS dual core processors AXI_ACP communication buses inside SOC carry out data interaction.
In the optional embodiment of the utility model one, when TCXO units/OCXO clock circuits unit is used to produce local And export and give PL processors, the Zhong Yuan as the reproduction of GNSS signal local zone time.
In the optional embodiment of the utility model one, SDIO is used between memory circuit cells and SOC processor modules Communication interface circuit, storage content include the application program of receiver and GNSS application data.
In the optional embodiment of the utility model one, communication circuit units include WiFi/BT chip circuits, Bluetooth antenna Circuit, WiFi antenna circuits, communication work state ON-OFF control circuit and digital communication interface SDIO circuits.
In the optional embodiment of the utility model one, Nor Flash circuit units include Nor Flash circuits and QSPI Operating mode circuit, Nor Flash are used for the BOOT program storages for completing baseband platform.
In the optional embodiment of the utility model one, ethernet circuit unit include ethernet physical layer transmission circuit, Network clocking circuit, ethernet physical layer transmission circuit are connected with the MIO interfaces of PS-B kernels, by nuclear control network thing in PS-B Manage layer circuit；Ethernet circuit unit externally provides the data transmission interface of 10M and 100M speed.
In the optional embodiment of the utility model one, UART interface circuit unit has short caused by PS dual core processors Road/electrostatic discharge protective circuit, the short circuit/electrostatic discharge protective circuit is by RS232 circuits all the way and LVTTL circuits form all the way, RS232 electricity LVTTL-1.8V transfer standard RS232 circuits are wrapped on road, and LVTTL circuits turn LVTTL-3.3V circuits by LVTTL-1.8V, have short Road is protected and electrostatic discharge protective circuit.
In the optional embodiment of the utility model one, usb circuit unit is by USB transmission circuits and USB-HUBR electricity Road unit composition, USB transmission circuits are used to realize switchs to USB OTG interfaces by the USB of PS dual core processors, It is multiple usb circuits that USB-HUBR circuit units, which are used for a usb expansion,.
In the optional embodiment of the utility model one, CAN interface circuit unit believes the LVTTL-1.8V of PS-A kernels Number LVTTL-3.3V signals are converted to, then signal is switched to by differential signal using RS485 level shifting circuits.
In the optional embodiment of the utility model one, IIC interface circuits unit includes IIC interface clocks, data-signal Protection circuit and drive circuit, it is externally the IIC communication interfaces of standard, for connecting peripheral hardware IIC interface main equipments.
In the optional embodiment of the utility model one, TCXO units include power supply stabilization circuit and clock amplifier circuit, Power supply stabilization circuit provides the dc source of 1.8v low noise all the way for TCXO units, and clock amplifier circuit produces TCXO units Generating clock signal carries out shaping amplification, is then output to PS dual core processors and does clock source.
In the optional embodiment of the utility model one, RTC circuit unit includes RTC power circuits and RTC clock circuit, RTC power circuits include RTC power charging circuits and discharge circuit, and RTC clock circuit is included in data transmission circuit and time Disconnected generation circuit.
In the optional embodiment of the utility model one, the input signal of SPI circuit unit is produced by PL processors.
In the optional embodiment of the utility model one, external event input signal circuit unit includes：
External signal input detecting circuit unit, for being detected to external signal；
Signal transformation circuit unit, for carrying out shaping filter to signal；
Electrostatic discharge protective circuit unit, for protection circuit signal.
In the optional embodiment of the utility model one, pps pulse per second signal output circuit unit includes the pulse production being in series Raw circuit unit, signal drive circuit unit and short-circuit protection circuit unit, pulse-generating circuit export LVTTL-1.8V side Ripple signal, signal drive circuit unit are amplified to the signal of pulse-generating circuit, comprising voltage amplification and Current amplifier, so After be transported to short-circuit protection circuit unit and externally export.
A kind of GNSS receiver baseband hardware circuit structure of SOC frameworks provided by the utility model is by by SOC processing Device circuit unit is connected with platform hardware basic resource circuit unit and data input/output interface circuit unit, SOC processors Circuit unit receives GNSS intermediate-freuqncy signals caused by other radio circuits, and PL partial circuits enter in SOC processor circuit units Row signal is related, captures, tracking processing, and the text initial data of GNSS signal is passed through into the AXI_ACP buses inside SOC PS-B cores in SOC processor circuit units are output to, the PS-B cores of SOC processor circuit units are original to GNSS signal text Data are parsed, GNSS positioning calculations and high accuracy resolve, and produce initial data and the positioning of GNSS satellite, SOC processing The PS-B cores of device circuit unit are by the PS-A cores of the AXI_ACP bus transfers of inside to SOC processor circuit units, at SOC Data are connected to data input/output interface circuit unit by the PS-A cores of reason device circuit unit, finally defeated by the data input Outgoing interface circuit unit carries out data interaction communication to miscellaneous equipment.
Due to use SOC type single-chip hardware platforms, the substantial amounts of satellite datas of GNSS in SOC internal transmission, and Using ARM AXI_ACP buses, the transmission of big data and real-time property have obtained very big raising, then have SOC cores Piece has two independent PS processor cores, the PS-B of two independent PS process cores emphasis and to GNSS data calculation process, PS-A cores are responsible for external communication transfer.
GNSS receiver baseband hardware circuit platform provided by the utility model based on SOC frameworks causes existing GNSS Receiver opens the interface bottle of the reception processing the whole world available numerous transmission of GNSS satellite signal data, processing and diversification Neck, adapt to the needs that present GNSS development is used multimode multi-frequency satellite-signal with user.Circuit structure is simple and practical, function Powerful, stable and reliable working performance convenient and swift using process, the scope of application is relatively broad.
Preferred embodiment of the present utility model is described above.It is to be appreciated that the utility model not office It is limited to above-mentioned particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as using the common side in this area Formula is practiced；Any those skilled in the art, in the case where not departing from technical solutions of the utility model ambit, all may be used Technical solutions of the utility model are made with many possible changes and modifications using the methods and technical content of the disclosure above, or is repaiied The equivalent embodiment of equivalent variations is changed to, this has no effect on substantive content of the present utility model.Therefore, it is every without departing from this practicality The content of new technique scheme, according to the technical essence of the utility model to any simple modification made for any of the above embodiments, etc. With change and modification, still fall within technical solutions of the utility model protection in the range of.

Claims (17)

  1. A kind of 1. GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks, it is characterised in that the structure Including SOC processor modules, platform hardware basic resource module and input/output interface module；
    The SOC processor modules include PL processors, PS dual core processors, and PS dual core processors are included in PS-A kernels and PS-B Core；
    Platform hardware basic resource module include Nor Flash circuit units, communication circuit units, exented memory circuit unit, Memory circuit cells and OCXO clock circuit units；
    Input/output interface module includes external event input signal circuit unit, pps pulse per second signal output circuit unit, at PL UART circuitry unit, SPI circuit unit, RTC circuit unit, TCXO units, IIC interface circuits unit, CAN connect caused by reason device Mouthful circuit unit, usb circuit unit, UART interface circuit unit and ethernet circuit list caused by PS dual core processors Member；
    GNSS intermediate-freuqncy signals caused by SOC processor modules reception external radio frequency circuit, are exported after PL processors are handled To PS-B kernels, the interior verification GNSS signal text initial data of PS-B is parsed, GNSS positioning calculations and high accuracy resolve simultaneously PS-A kernels are transferred to after the initial data of generation GNSS satellite and positioning, PS-A kernels output data to input/output interface Module, output is carried out by input/output interface module and carries out data interaction communication with peripheral apparatus.
  2. 2. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, it is special Sign is, using LPDDR2 internal memories as exented memory circuit unit, using EMMC memories as memory circuit cells, and handle Original observed data, RTK, PPP positioning result data are exported by input/output interface module；
    The LPDDR2 memory data interfaces are 32bit, a width of 10bit of address bit.
  3. 3. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, it is special Sign is that SOC processor modules are single SOC, and GNSS baseband signals are handled using PL processors, and GNSS data is resolved and adopted With PS dual core processors, carried out between PL processors and PS dual core processors using the AXI_ACP communication buses inside SOC Data interaction.
  4. 4. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, it is special Sign is, when TCXO units/OCXO clock circuits unit is used to produce local and exports and gives PL processors, as GNSS signal sheet The Zhong Yuan of ground time reproduction.
  5. 5. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, it is special Sign is, SDIO communication interface circuits are used between memory circuit cells and SOC processor modules, and storage content includes receiver Application program and GNSS application data.
  6. 6. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, it is special Sign is that communication circuit units include WiFi/BT chip circuits, Bluetooth antenna circuit, WiFi antenna circuits, communication work state ON-OFF control circuit and digital communication interface SDIO circuits.
  7. 7. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, it is special Sign is that Nor Flash circuit units include Nor Flash circuits and QSPI operating mode circuits, and Nor Flash are used to complete The BOOT program storages of baseband platform.
  8. 8. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, it is special Sign is that ethernet circuit unit includes ethernet physical layer transmission circuit, network clocking circuit, ethernet physical layer transmitting-receiving electricity Road is connected with the MIO interfaces of PS-B kernels, by nuclear control networked physics layer circuit in PS-B；
    Ethernet circuit unit externally provides the data transmission interface of 10M and 100M speed.
  9. 9. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, it is special Sign is that UART interface circuit unit has short circuit/electrostatic discharge protective circuit caused by PS dual core processors, and the short circuit/electrostatic is protected Protection circuit is by RS232 circuits all the way and LVTTL circuits form all the way, RS232 circuit bag LVTTL-1.8V transfer standards RS232 electricity Road, LVTTL circuits turn LVTTL-3.3V circuits by LVTTL-1.8V, have short-circuit protection and electrostatic discharge protective circuit.
  10. 10. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, its It is characterised by, usb circuit unit is made up of USB transmission circuits and USB-HUBR circuit units, and USB transmission circuits are used for real The USB of PS dual core processors is now switched into USB OTG interfaces, USB-HUBR circuit units are used to expand a USB Open up as multiple usb circuits.
  11. 11. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, its It is characterised by, the LVTTL-1.8V signals of PS-A kernels are converted to LVTTL-3.3V signals by CAN interface circuit unit, then are used Signal is switched to differential signal by RS485 level shifting circuits.
  12. 12. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, its It is characterised by, IIC interface circuits unit includes IIC interface clocks, data-signal protection circuit and drive circuit, is externally standard IIC communication interfaces, for connecting peripheral hardware IIC interface main equipments.
  13. 13. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, its It is characterised by, TCXO units include power supply stabilization circuit and clock amplifier circuit, and power supply stabilization circuit provides one for TCXO units TCXO units are produced clock signal and carry out shaping amplification by the dc source of road 1.8v low noise, clock amplifier circuit, then It is output to PS dual core processors and does clock source.
  14. 14. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, its It is characterised by, RTC circuit unit includes RTC power circuits and RTC clock circuit, and RTC power circuits include RTC power source charges electricity Road and discharge circuit, RTC clock circuit includes data transmission circuit and the time interrupts generation circuit.
  15. 15. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, its It is characterised by, the input signal of SPI circuit unit is produced by PL processors.
  16. 16. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, its It is characterised by, external event input signal circuit unit includes：
    External signal input detecting circuit unit, for being detected to external signal；
    Signal transformation circuit unit, for carrying out shaping filter to signal；
    Electrostatic discharge protective circuit unit, for protection circuit signal.
  17. 17. a kind of GNSS satellite receiver baseband hardware platform circuit structure of SOC frameworks according to claim 1, its It is characterised by, pps pulse per second signal output circuit unit includes pulse-generating circuit unit, the signal drive circuit unit being in series With short-circuit protection circuit unit, pulse-generating circuit exports LVTTL-1.8V square-wave signal, and signal drive circuit unit is to arteries and veins The signal for rushing generation circuit is amplified, and comprising voltage amplification and Current amplifier, is then delivered to short-circuit protection circuit unit pair Outer output.
CN201720313759.4U 2017-03-28 2017-03-28 A kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks Expired - Fee Related CN206684303U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107064960A (en) * 2017-03-28 2017-08-18 上海双微导航技术有限公司 A kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks
CN108806243A (en) * 2018-04-24 2018-11-13 东南大学 A kind of traffic flow information acquisition terminal based on Zynq-7000

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107064960A (en) * 2017-03-28 2017-08-18 上海双微导航技术有限公司 A kind of GNSS satellite receiver baseband hardware platform circuit structure based on SOC frameworks
CN108806243A (en) * 2018-04-24 2018-11-13 东南大学 A kind of traffic flow information acquisition terminal based on Zynq-7000
CN108806243B (en) * 2018-04-24 2020-09-29 东南大学 Traffic flow information acquisition terminal based on Zynq-7000

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