CN110730030A - Beidou satellite communication interface module - Google Patents
Beidou satellite communication interface module Download PDFInfo
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- CN110730030A CN110730030A CN201910923351.2A CN201910923351A CN110730030A CN 110730030 A CN110730030 A CN 110730030A CN 201910923351 A CN201910923351 A CN 201910923351A CN 110730030 A CN110730030 A CN 110730030A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/243—Demodulation of navigation message
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/36—Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
Abstract
The invention provides a Beidou skywalking communication interface module which is respectively connected with a task core processor and a radio frequency transceiver and is characterized by comprising a Beidou radio frequency baseband integrated unit, a skywalking radio frequency baseband integrated unit, an interface control unit, a BMC unit, a power supply unit and a VPX interface, wherein the Beidou radio frequency baseband integrated unit and the skywalking radio frequency baseband integrated unit are respectively connected with the interface control unit, the interface control unit is connected with the VPX interface, the VPX interface is respectively connected with the BMC unit and the task core processor, the Beidou radio frequency baseband integrated unit and the skywalking radio frequency baseband integrated unit are respectively connected with the radio frequency transceiver, and the power supply unit is connected with other units Positioning calculation, information processing and other tasks.
Description
Technical Field
The invention relates to the field of satellite communication, in particular to a Beidou space communication interface module, which is particularly applied to an armored vehicle-mounted Beidou space communication system.
Background
With the development of modern electronic technology, information technology and computer technology, satellite navigation and communication systems play more and more important roles in the military field, and gradually become a basic strategic resource. Satellite navigation and communication equipment has become a necessary technical guarantee and efficiency multiplier for advanced weaponry, playing a significant role in determining strategic patterns. The construction of the Beidou I, II and III systems and the skynet system and the coexistence of multiple navigation satellite systems enable equipment with Beidou positioning, communication as a main part and multimode compatibility as an auxiliary part and taking command capability into consideration to be an inevitable trend for the development of armored positioning cluster equipment. Aiming at the mission and the task of an armored mechanized army, the armored vehicle-mounted Beidou skywalking communication system needs to meet the requirements of positioning, navigation, communication, instruction control and the like of vehicle action and battle, and the satellite navigation Beidou skywalking communication interface module is a vital component in a skywalking system, and becomes a hot point of research for improving the functional performance of the satellite navigation technology along with the rapid development of the satellite navigation technology.
Patent document No. CN104639898B discloses a multifunctional service transmission device based on a Rapidio switching network, which is characterized in that the multifunctional service transmission device comprises a multifunctional service device, a transmission node device and an FMC connector; the multifunctional service device includes: the system comprises an AD video processing module, a DA video processing module, an audio processing module, a serial port processing module, a control quantity processing module, a first FPGA processing module and a first FMC interface; the transmission node apparatus includes: the second FPGA processing module, the photoelectric conversion module and the second FMC interface; the second FPGA processing module is respectively connected with the second FMC interface and the photoelectric conversion module; the multifunctional service device and the transmission node device are respectively connected with the FMC connector through the first FMC interface and the second FMC interface; and the photoelectric conversion module in the transmission node device is connected with the serial Rapidio switching network through an optical fiber. The transmission device cannot independently complete the simultaneous transmission and exchange of positioning and data communication.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a Beidou satellite communication interface module.
According to the Beidou space communication interface module provided by the invention, the Beidou space communication interface module is respectively connected with a task core processor and a radio frequency signal and comprises a Beidou radio frequency baseband integrated unit, a space communication radio frequency baseband integrated unit, an interface control unit, a BMC unit, a power supply unit and a VPX interface, wherein the Beidou radio frequency baseband integrated unit and the space communication radio frequency baseband integrated unit are respectively connected with the interface control unit, the interface control unit is connected with the VPX interface, the VPX interface is respectively connected with the BMC unit and the task core processor, the Beidou radio frequency baseband integrated unit and the space communication radio frequency baseband integrated unit are respectively connected with the radio frequency signal, and the power supply unit is respectively connected with the BMC unit, the interface control unit, the Beidou radio frequency baseband integrated unit and the space communication radio frequency baseband integrated unit.
Preferably, the Beidou radio frequency baseband integrated unit comprises a radio frequency processing part, a baseband processing part, a power circuit and an RCT circuit, wherein the radio frequency processing part comprises a radio frequency chip, an SAW filter and a crystal oscillator, the radio frequency chip is respectively connected with the SAW filter and the crystal oscillator, and the SAW filter and the radio frequency chip are connected with radio frequency signals;
the base band processing part comprises a base band chip, the base band chip is respectively connected with the RCT circuit, the interface control unit and the radio frequency chip, and the power supply circuit is connected with the power supply unit and supplies power for the Beidou radio frequency base band integrated unit.
Preferably, the SAW filters are multiple, and each SAW filter is connected with a different radio frequency signal input;
the communication interface module of the Beidou satellite communication system further comprises a security module, and the security module is connected with the baseband chip.
Preferably, the antenna-pass radio-frequency baseband integrated unit comprises a baseband unit, a radio-frequency unit, a power supply processing unit and an interface unit, wherein the radio-frequency unit comprises a radio-frequency transceiving chip, a transceiving SAW filter and a temperature compensated oscillator TCXO, the radio-frequency transceiving chip is respectively connected with the transceiving SAW filter and the temperature compensated oscillator TCXO, the transceiving SAW filter is used for transceiving radio-frequency signals, and the radio-frequency transceiving chip is connected with a BD/GPS antenna interface;
the base band unit comprises a base band processing chip and an MCP memory chip, wherein the MCP memory chip comprises a computer flash memory device NAND and a synchronous dynamic random access memory SDRAM, the base band processing chip is connected with the MCP memory chip, and the base band processing chip is connected with a radio frequency transceiver chip;
the power supply processing unit is internally integrated with a power management unit PMU and a CODEC unit, and is connected with a temperature compensation oscillator TCXO, a radio frequency transceiver chip, a baseband processing chip, an MCP memory chip and a power supply unit;
the interface unit includes a BTB connector that is connected to the interface control unit and is capable of sending signals thereto.
Preferably, the skynting radio frequency baseband integrated unit further includes a SIM card and an encrypted CF card interface.
Preferably, the interface control unit comprises an FPGA, an extended data interface and an FSK data modulator, the FPGA is connected with the Beidou radio frequency baseband integrated unit, the skynet radio frequency baseband integrated unit and the VPX interface, and the FPGA is respectively connected with the extended data interface and the FSK data modulator;
the FPGA comprises a test interface, a serial port control unit, a time service interface and a data interface, wherein the test interface is respectively connected with the serial port control unit, the time service interface and the data interface, and the Beidou radio frequency baseband integrated unit and the Tiantong radio frequency baseband integrated unit are connected with the FPGA through the serial port control unit and the time service interface.
Preferably, the serial port control unit can convert data of the Beidou radio frequency baseband integrated unit or the skynet radio frequency baseband integrated unit into SRIO data and transmit the SRIO data to the VPX interface;
the time service interface can judge the effectiveness of the 1PPS signal of the Beidou radio frequency baseband integrated unit and the skynting radio frequency baseband integrated unit and the 1PPS signal sent by the VPX interface, and selects the effective 1PPS signal to generate TOD information according to a protocol;
the FSK data modulator can encapsulate and modulate data containing geographic position information onto a radio frequency carrier, and combine the data with navigation and antenna signals to transmit the data to the Beidou all-in-one integrated antenna.
Preferably, the data interface includes a TOD data transmission interface, a RapidIO data transmission interface, and a differential 1PPS interface.
Preferably, the BMC unit includes a current sensor, a temperature sensor, and a single chip microcomputer, and the single chip microcomputer is connected to the current sensor, the temperature sensor, and the VPX interface, respectively.
Preferably, the power supply unit includes a digital power supply and an analog power supply, and the power supply unit can provide different operating voltages.
Compared with the prior art, the invention has the following beneficial effects:
1. the Beidou satellite communication interface module has the receiving and processing capacities of the sky communication, the Beidou RNSS, the Beidou RDSS, the GPS and the GLONASS signals and the transmitting and processing capacities of the sky communication and the Beidou RDSS, and completes the functions of modulation and demodulation, positioning calculation, information processing and the like of the Beidou and the sky communication signals.
2. The invention can realize signal processing and information processing, on one hand, the invention completes the receiving processing of navigation signals and communication signals and realizes the realization of various positioning algorithms and communication processing, and on the other hand, the invention completes the processing of the generation, coding and the like of transmitting signals and the output of external interfaces.
3. The invention has the functions of skywalking voice and high-speed data communication, adopts a skywalking module for realizing skywalking communication, runs a skywalking protocol stack, realizes data transmission with a core board, realizes skywalking radio frequency transceiving between the module and an antenna component, and has interfaces of an SIM card, an encrypted CF card and the like.
4. By adopting the temperature sensor, the invention can realize real-time monitoring of the temperature and effectively avoid the fault caused by the influence of the temperature; by adopting the current sensor, the current can be monitored in real time, and faults caused by current influence are effectively avoided.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a block diagram of the structure of the Beidou radio frequency baseband integrated unit;
FIG. 3 is a block diagram of the structure of an all-weather radio frequency baseband integrated unit;
FIG. 4 is a block diagram of an interface control unit;
FIG. 5 is a block diagram of a BMC unit;
fig. 6 is a schematic block circuit diagram of a power supply unit.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The Beidou satellite communication interface module has the receiving and processing capacities of the sky communication, the Beidou RNSS, the Beidou RDSS, the GPS and the GLONASS signals and the transmitting and processing capacities of the sky communication and the Beidou RDSS, and completes the functions of modulation and demodulation, positioning calculation, information processing and the like of the Beidou and the sky communication signals. The method can realize signal processing and information processing, on one hand, complete the receiving processing of navigation signals and communication signals and realize various positioning algorithms and communication processing, and on the other hand, complete the processing of generation, coding and the like of transmitting signals and output to an external interface. The invention has the functions of skywalking voice and high-speed data communication, adopts a skywalking module for realizing skywalking communication, runs a skywalking protocol stack, realizes data transmission with a core board, realizes skywalking radio frequency transceiving between the module and an antenna component, and has interfaces of an SIM card, an encrypted CF card and the like. The invention can realize various data interaction and external interface work, including TOD interface input and output control, RapidIO data transmission interface control, difference 1PPS input and output control, serial port filling, serial port debugging control, and modulating position information acquired by the skynet radio frequency baseband integrated unit into radio frequency signals. The invention can realize the detection of the voltage, the current and the temperature of the Beidou skywalking communication interface module, report the detection result in real time, and turn off the power supply when necessary, thereby avoiding the fault amplification. Aiming at the special requirements of a Beidou application, the Beidou system authorized information processing system has the capability of processing certain authorized information of the Beidou system, and provides an integrated interface of a PRM chip, a secret module, an IC card or an IC card chip.
According to the Beidou skywalking communication interface module provided by the invention, as shown in fig. 1, the Beidou skywalking communication interface module is respectively connected with a task core processor and radio frequency signals and comprises a Beidou radio frequency baseband integrated unit, a skywalking radio frequency baseband integrated unit, an interface control unit, a BMC unit, a power supply unit and a VPX interface, the Beidou radio frequency baseband integrated unit and the skywalking radio frequency baseband integrated unit are respectively connected with the interface control unit, the interface control unit is connected with the VPX interface, the VPX interface is respectively connected with the BMC unit and the task core processor, the Beidou radio frequency baseband integrated unit and the skywalking radio frequency baseband integrated unit are respectively connected with the radio frequency signals, and the power supply unit is respectively connected with the BMC unit, the interface control unit, the Beidou radio frequency baseband integrated unit and the skywalk. According to the requirements of an armored vehicle-mounted Beidou heaven communication system, the armored vehicle-mounted Beidou heaven-earth communication system has the interfaces of a VPX bus interface, a data serial port, 1PPS output, IRIG-B (DC) time code output, RapidIO output, testing and the like so as to meet the requirements of integration, testing, application and the like, wherein the testing interface is required to support authorization information filling and changing processing in consideration of equipment maintenance. The interface control unit integrates an FSK data modulator and is used for sending the geographical position information to a beam controller of the Beidou skynet integrated antenna. In addition, in consideration of future capability expansion and upgrading of the equipment, a data interface is reserved to realize future capability upgrading (such as supporting inertial navigation data access) and lay a foundation for realizing higher performance of the equipment.
As shown in fig. 2, the big dipper radio frequency baseband integrated unit includes a radio frequency processing portion, a baseband processing portion, a power circuit and an RCT circuit, the radio frequency processing portion includes a radio frequency chip, a SAW filter and a crystal oscillator, the radio frequency chip is respectively connected to the SAW filter and the crystal oscillator, and the SAW filter and the radio frequency chip are connected to a radio frequency signal; the base band processing part comprises a base band chip, the base band chip is respectively connected with the RCT circuit, the interface control unit and the radio frequency chip, and the power supply circuit is connected with the power supply unit and supplies power for the Beidou radio frequency base band integrated unit. The SAW filter is multiple, and each SAW filter is connected with different radio frequency signal inputs; the communication interface module of the Beidou satellite communication system further comprises a security module, and the security module is connected with the baseband chip. The radio frequency processing part has two functions of receiving and transmitting. The method comprises the steps of filtering, frequency converting and amplifying received satellite signals of frequency points such as RDSS-S, RNSS-B1, RNSS-B3, GPS-L1, GLONASS and the like, outputting intermediate frequency signals of each path of RDSS-S, RNSS-B1, RNSS-B3, GPS-L1 and GLONASS, providing input for receiving and processing baseband navigation signals, and realizing AGC control of a receiving channel. And secondly, modulating the baseband signal to be transmitted from the baseband processing, and outputting an RDSS-L frequency point signal to finish transmission. The baseband processing part completes the receiving processing of navigation signals and communication signals, realizes the realization of various positioning algorithms and communication processing, and completes the processing of the generation, coding and the like of transmitting signals and the output of an external interface. Aiming at the special requirements of Beidou military application, the Beidou radio frequency baseband integrated unit has the processing capacity of Beidou system military authorization information and provides an integrated interface of a PRM chip, a secret module and an IC card or an IC card chip.
As shown in fig. 3, the all-in-one antenna-rf baseband integrated unit includes a baseband unit, an rf unit, a power processing unit, and an interface unit, where the rf unit includes an rf transceiver chip, a transmitting/receiving end SAW filter, and a temperature compensated oscillator TCXO, the rf transceiver chip is connected to the transmitting/receiving end SAW filter and the temperature compensated oscillator TCXO, the transmitting/receiving end SAW filter transmits and receives rf signals, and the rf transceiver chip is connected to a BD/GPS antenna interface; the base band unit comprises a base band processing chip and an MCP memory chip, wherein the MCP memory chip comprises a computer flash memory device NAND and a synchronous dynamic random access memory SDRAM, the base band processing chip is connected with the MCP memory chip, and the base band processing chip is connected with a radio frequency transceiver chip; the power supply processing unit is internally integrated with a power management unit PMU and a CODEC unit, and is connected with a temperature compensation oscillator TCXO, a radio frequency transceiver chip, a baseband processing chip, an MCP memory chip and a power supply unit; the interface unit includes a BTB connector that is connected to the interface control unit and is capable of sending signals thereto. The all-in-one radio frequency baseband integrated unit further comprises an SIM card interface and an encrypted CF card interface. An all-weather radio frequency baseband integrated unit is a core part for realizing the functions of all-weather voice and high-speed data communication by a Beidou all-weather communication interface module. The invention adopts an S-band wireless module MSMO1B module which integrates a baseband unit, a radio frequency unit, a power supply processing and interface unit, realizes the communication of the skynet, runs a skynet protocol stack, realizes the data transmission with a core board, realizes the skynet radio frequency transceiving between the module and an antenna assembly, and has an SIM card interface and an encrypted CF card interface. The baseband unit uses military baseband processing chip MSKT01A, and MCP chip memory chip contains NAND (computer flash memory) and SDRAM (synchronous dynamic random access memory). The radio frequency unit uses a radio frequency transceiving chip MSR01A, a transceiving end SAW filter and a temperature compensation oscillator TCXO, and the temperature compensation oscillator TCXO adopts a 6M voltage-controlled oscillator. The interface unit adopts a BTB connector: QTS-025-0-1-L-D-A and AXK6S50447YG and a radio frequency interface S/BD antenna connector.
As shown in fig. 4, the interface control unit includes an FPGA, an extended data interface, and an FSK data modulator, the FPGA is connected to the beidou radio frequency baseband integrated unit, the skyness radio frequency baseband integrated unit, and the VPX interface, and the FPGA is connected to the extended data interface and the FSK data modulator, respectively; the FPGA comprises a test interface, a serial port control unit, a time service interface and a data interface, wherein the test interface is respectively connected with the serial port control unit, the time service interface and the data interface, and the Beidou radio frequency baseband integrated unit and the Tiantong radio frequency baseband integrated unit are connected with the FPGA through the serial port control unit and the time service interface. The serial port control unit can convert data of the Beidou radio frequency baseband integrated unit or the skynet radio frequency baseband integrated unit into SRIO data and transmit the SRIO data to the VPX interface; the time service interface can judge the effectiveness of the 1PPS signal of the Beidou radio frequency baseband integrated unit and the skynting radio frequency baseband integrated unit and the 1PPS signal sent by the VPX interface, and selects the effective 1PPS signal to generate TOD information according to a protocol; the FSK data modulator can encapsulate and modulate data containing geographic position information onto a radio frequency carrier, and combine the data with navigation and antenna signals to transmit the data to the Beidou all-in-one integrated antenna. The data interface comprises a TOD data transmission interface, a RapidIO data transmission interface and a difference 1PPS interface. The FPGA is the core of the interface control unit, and a data interface, a time service interface and a serial port control unit are integrated inside the FPGA. The serial port control unit can be connected with the VPX bus by converting serial port data of the Beidou radio frequency baseband integrated unit into SRIO data. The transmitted data comprises Beidou positioning information, ephemeris information, short message information and control information. The time service interface is a time information control unit of the Beidou satellite communication interface module, validity judgment is carried out on a 1PPS signal of Beidou and a 1PPS signal transmitted from VPX data, the valid 1PPS signal generates TOD information according to a protocol, and the TOD information is transmitted to a VPX bus through the TOD interface to provide time reference for radio station synchronization. Under the TOD forwarding mode, the time service can transparently forward the information transmitted from the VPX bus to other TOD interfaces, thereby realizing the internal clock synchronization working mode of the radio station. And the FSK data modulator is used for packaging and modulating serial port data containing geographical position information onto a radio frequency carrier, combining the radio frequency carrier with navigation and antenna signals, and transmitting the serial port data to the Beidou antenna-antenna integrated antenna through 'one-wire communication'. The test interface is mainly used for conveniently receiving the Beidou radio frequency baseband integrated unit and some TOD data information. And upgrading the extended data interface system and debugging the system.
As shown in fig. 5, the BMC unit includes a current sensor, a temperature sensor, and a single chip microcomputer, and the single chip microcomputer is connected to the current sensor, the temperature sensor, and the VPX interface, respectively. The BMC unit is an independent function unit on the Beidou satellite communication interface module, can detect the voltage, the current and the temperature of the Beidou satellite communication interface module, and uploads information to the core machine, so that the core machine monitors the state of the Beidou satellite communication interface module. The single chip microcomputer selects STM32F207 which is based on ARM-32-bit Cortex-M3 CPU, is provided with a flexible static storage controller, supports SRAM, NOR and NAND memories and is provided with an IIC interface. The DS18B20 digital temperature sensor is selected as the temperature sensor, the temperature sensor can provide 9-Bit to 12-Bit centigrade temperature precision and a user programmable nonvolatile alarm function with over-temperature and low-temperature trigger alarm, 1-Wire communication adopted by the DS18B20 is only communicated with the microcontroller by a data line (and ground), and the temperature detection range is-55 to 125. The current sensor is an INA219 current sensor, and the INA219 is a bidirectional current and power monitoring meter with an IIC interface, can monitor the voltage drop of a shunt and the voltage of a bus power supply, and can monitor the partial voltage in the bus within the range of 0V-26V. STM32F207 is connected to INA219 via the IIC interface and to DS18B20 via the single-wire interface. The STM32F207 can acquire temperature data of the DS18B20 and current and voltage data of the INA219 in real time and send the data to the FPGA in a bus mode to further communicate with the system. Further, the STM32F207 can perform the function of turning off and on the power supply by controlling the high-low state of the Pw _ En pin, and preferably, the STM32F207 can perform the function of turning off and on the 12V power supply by controlling the high-low state of the Pw _ En pin.
As shown in fig. 6, the power supply unit includes a digital power supply and an analog power supply, and the power supply unit can provide different operating voltages. The power supply unit, while considering implementing on-board processing resources to provide multiple operating voltages, also needs to consider how to achieve low power consumption. The invention divides the voltage design into two types of digital power supply and analog power supply, wherein the digital power supply comprises: the number of the chips of Tiant _5V, FPGA, STM32, PRM, IC, UART and the like contained in the extended skynet module is 3.3V, XC7K325T-2FFG676I, the nuclear power is 1.1V and 1.2V, the MGT _1V, XC7K325T-2FFG676I0 and the 1.8V of the PRM chip. The design of the part of digital power supply adopts a DC/DC voltage transformation mode and a pi-type filter filtering mode, and the voltage conversion efficiency is not lower than 93 percent. The analog power supply part comprises a radio frequency link 3.3V, a system clock 3.3V and a GTX clock 2.5V. The analog power supply part is designed by utilizing a linear stabilized voltage supply LDO chip to perform secondary voltage transformation on the basis of the voltage similar to the existing digital power supply, the secondary voltage transformation mode not only reduces the input-output voltage difference of the LDO and improves the efficiency of voltage transformation, but also can ensure the harsh requirements of an analog circuit on power supply ripples and the like, and the conversion efficiency of the analog power supply part is not lower than 80 percent under the scheme.
In summary, the Beidou radio frequency baseband integrated unit is a core part of the Beidou skywalking communication interface module for realizing signal processing and information processing, on one hand, the Beidou skywalking communication interface module completes receiving processing of navigation signals and communication signals, realizes realization of various positioning algorithms and communication processing, on the other hand, the Beidou skywalking communication interface module completes generation, encoding and other processing of transmitting signals, and outputs the transmitting signals to an external interface. The skynting radio frequency baseband integrated unit is a core part of a Beidou skynting communication interface module for realizing the functions of skynting voice and high-speed data communication, runs a skynting protocol stack, realizes data transmission with a core board, realizes skynting radio frequency transceiving between the module and an antenna assembly, and is provided with interfaces such as an SIM card and an encryption CF card. The interface control unit mainly realizes various data interaction and external interface work, and comprises TOD interface input and output control, RapidIO data transmission interface control, difference 1PPS input and output control, serial port filling, serial port debugging control, modulation of position information acquired by the space-through radio frequency baseband integrated unit and the like in a radio frequency signal. The BMC unit is an independent function unit on the Beidou satellite communication interface module, realizes detection of voltage, current and temperature of the Beidou satellite communication interface module, reports a detection result in real time, and can turn off a power supply if necessary to avoid fault amplification. The power supply unit provides power conversion and working voltage of the module units except the BMC unit for the Beidou skywalking communication interface module, and provides guarantee for normal work of each functional module.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The Beidou space communication interface module is characterized by comprising a Beidou radio frequency baseband integrated unit, a space communication radio frequency baseband integrated unit, an interface control unit, a BMC unit, a power supply unit and a VPX interface, wherein the Beidou radio frequency baseband integrated unit and the space communication radio frequency baseband integrated unit are respectively connected with the interface control unit, the interface control unit is connected with the VPX interface, the VPX interface is respectively connected with the BMC unit and the task core processor, the Beidou radio frequency baseband integrated unit and the space communication radio frequency baseband integrated unit are respectively connected with the radio frequency signal, and the power supply unit is respectively connected with the BMC unit, the interface control unit, the Beidou radio frequency baseband integrated unit and the space communication radio frequency baseband integrated unit.
2. The Beidou satellite communication interface module according to claim 1, wherein the Beidou radio frequency baseband integrated unit comprises a radio frequency processing part, a baseband processing part, a power circuit and an RCT circuit, the radio frequency processing part comprises a radio frequency chip, an SAW filter and a crystal oscillator, the radio frequency chip is respectively connected with the SAW filter and the crystal oscillator, and the SAW filter and the radio frequency chip are connected with radio frequency signals;
the base band processing part comprises a base band chip, the base band chip is respectively connected with the RCT circuit, the interface control unit and the radio frequency chip, and the power supply circuit is connected with the power supply unit and supplies power for the Beidou radio frequency base band integrated unit.
3. The Beidou satellite communication interface module according to claim 2, wherein the number of SAW filters is plural, each SAW filter being connected to a different radio frequency signal input;
the communication interface module of the Beidou satellite communication system further comprises a security module, and the security module is connected with the baseband chip.
4. The Beidou satellite communication interface module according to claim 1, wherein the skywalking radio frequency baseband integrated unit comprises a baseband unit, a radio frequency unit, a power supply processing unit and an interface unit, the radio frequency unit comprises a radio frequency transceiving chip, a transmitting/receiving end SAW filter and a temperature compensated oscillator TCXO, the radio frequency transceiving chip is respectively connected with the receiving/receiving end SAW filter and the temperature compensated oscillator TCXO, the transmitting/receiving end SAW filter transmits and receives radio frequency signals, and the radio frequency transceiving chip is connected with a BD/GPS antenna interface;
the base band unit comprises a base band processing chip and an MCP memory chip, wherein the MCP memory chip comprises a computer flash memory device NAND and a synchronous dynamic random access memory SDRAM, the base band processing chip is connected with the MCP memory chip, and the base band processing chip is connected with a radio frequency transceiver chip;
the power supply processing unit is internally integrated with a power management unit PMU and a CODEC unit, and is connected with a temperature compensation oscillator TCXO, a radio frequency transceiver chip, a baseband processing chip, an MCP memory chip and a power supply unit;
the interface unit includes a BTB connector that is connected to the interface control unit and is capable of sending signals thereto.
5. The Beidou satellite communication interface module according to claim 4, wherein the skywalking radio frequency baseband integrated unit further comprises a SIM card and encryption CF card interface.
6. The Beidou satellite communication interface module according to claim 1, wherein the interface control unit comprises an FPGA, an extended data interface and an FSK data modulator, the FPGA is connected with the Beidou radio frequency baseband integrated unit, the satellite communication radio frequency baseband integrated unit and the VPX interface, and the FPGA is respectively connected with the extended data interface and the FSK data modulator;
the FPGA comprises a test interface, a serial port control unit, a time service interface and a data interface, wherein the test interface is respectively connected with the serial port control unit, the time service interface and the data interface, and the Beidou radio frequency baseband integrated unit and the Tiantong radio frequency baseband integrated unit are connected with the FPGA through the serial port control unit and the time service interface.
7. The Beidou satellite communication interface module according to claim 6, wherein the serial port control unit can convert data of the Beidou radio frequency baseband integrated unit or the skywalking radio frequency baseband integrated unit into SRIO data and transmit the SRIO data to the VPX interface;
the time service interface can judge the effectiveness of the 1PPS signal of the Beidou radio frequency baseband integrated unit and the skynting radio frequency baseband integrated unit and the 1PPS signal sent by the VPX interface, and selects the effective 1PPS signal to generate TOD information according to a protocol;
the FSK data modulator can encapsulate and modulate data containing geographic position information onto a radio frequency carrier, and combine the data with navigation and antenna signals to transmit the data to the Beidou all-in-one integrated antenna.
8. The Beidou satellite communication interface module according to claim 6, wherein the data interface comprises TOD data transmission interface, RapidIO data transmission interface and differential 1PPS interface.
9. The Beidou satellite communication interface module according to claim 1, wherein the BMC unit comprises a current sensor, a temperature sensor and a single chip microcomputer, and the single chip microcomputer is connected with the current sensor, the temperature sensor and the VPX interface respectively.
10. The Beidou satellite communication interface module according to claim 1, wherein the power supply unit comprises a digital power supply and an analog power supply, and the power supply unit can provide different working voltages.
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| CN113242080A (en) * | 2021-04-20 | 2021-08-10 | 中国电子科技集团公司第五十四研究所 | Core module based on satellite communication |
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| CN113438012A (en) * | 2021-06-25 | 2021-09-24 | 中国电子科技集团公司第五十四研究所 | Multi-channel satellite communication device based on VPX framework |
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