Space-foundation integrated ground detection equipment based on CPCI framework

Abstract

The invention discloses sky-foundation integrated ground detection equipment based on a CPCI framework. The case is a reinforced 2U 19-inch standard CPCI upper frame case; the baseband signal processing board card generates a remote control signal and a distance measurement signal, and sends the remote control signal and the distance measurement signal to on-satellite ground-based measurement and control equipment or space-based measurement and control equipment; receiving a ranging signal and a telemetering signal from the on-satellite ground-based measurement and control equipment or the space-based measurement and control equipment, measuring the ranging signal, and controlling and testing the on-satellite ground-based measurement and control equipment; the signal processing unit generates a remote control signal and a ranging signal with carrier and code element Doppler coherence according to channel characteristics set by a user layer of the information processing unit, receives a ranging signal and a telemetry signal from on-satellite ground-based measurement and control equipment or space-based measurement and control equipment, and completes measurement of the ranging signal. Control and test of on-satellite ground-based measurement and control equipment or space-based measurement and control equipment are completed; and the information processing unit is used for controlling the signal processing unit to cooperatively work and completing equipment working condition control, information frame processing, test control and display.

Description

Technical Field

[0001] The present invention is implemented on a certain aerospace measurement and control ground test equipment and is a part of a measurement and control system. The technical field to which the present invention belongs is the field of aerospace measurement and control and satellite communication. Background Art

[0005] As an important part of the measurement and control subsystem, space-based ground detection equipment and ground-based ground detection equipment have been continuously explored and studied by many researchers at home and abroad in the hope of achieving better technological breakthroughs. CPCI is a high-performance industrial bus proposed by the global PCI Industrial Computer Manufacturers Group (PICMG) in 1994. In October 1999, the PICMG2.0 specification released by the PIC-MG organization is the core standard of CPCI.

[0006] Paper retrieval (CPCI+signal+implementation):

[0007] "Hardware Design and Implementation of Software Radio CPCI Signal Processing Board" (Author: Liao Min, China Excellent Master's Degree Thesis Full-text Database, published in 2011) analyzes the characteristics and development trends of software radio hardware platforms and proposes a software radio hardware platform solution based on CPCI standards. The article uses dual-core PPC, FPGA and DSP as the core components of the software radio architecture to realize an intermediate frequency signal processing board that supports embedded software development and high-speed data cache. However, the selected Spartan-6 series FPGA has certain limitations. Different from the XC7K325T-FBG900 selected in this method, the XC7K325T has the ability to expand upward and can be expanded to XC7K410T; on the other hand, the chip is a chip promoted by Xilinx, with a high market share and high cost performance. In addition, there are direct domestically produced alternative chips for XC7K325T in China, which has certain advantages for subsequent domestically produced designs.

[0008] "Hardware Design and Implementation of a Baseband Signal Transceiver Module" (Author: Fu Chunhui, China Excellent Master's Degree Thesis Full-text Database, Published in 2020) analyzes the characteristics and architecture of modular transceiver test equipment, and proposes a baseband signal transceiver module based on CPCI structure, which integrates broadband signal acquisition, processing and transmission. However, the input and output signal frequency range of 0.8GHz to 2GHz has certain limitations, which cannot cover the transceiver frequency range of the S band of my country's aerospace measurement and control. Although the paper also provides a solution (by adding RF up and down conversion modules and frequency synthesis modules to the standard CPCI chassis, the RF signal transceiver test function with a wider frequency range can be realized), this undoubtedly increases the scale of the equipment and reduces the convenience of equipment operation. Summary of the invention

[0009] The object of the present invention is to provide a ground-to-earth integrated ground detection device based on CPCI architecture, characterized in that it comprises: a chassis, a baseband signal processing board, a system board, a signal processing unit, and an information processing unit; wherein,

[0010] The chassis, including a passive backplane and a modular power supply, is a reinforced 2U 19-inch standard CPCI rack-mounted chassis;

[0011] The baseband signal processing board generates a remote control signal and a ranging signal, and sends the signals to the ground-based measurement and control equipment or the space-based measurement and control equipment on the satellite; receives the ranging signal and the telemetry signal from the ground-based measurement and control equipment or the space-based measurement and control equipment on the satellite, and completes the measurement of the ranging signal, thereby completing the control and test of the ground-based measurement and control equipment on the satellite;

[0012] The system board is a standard 6U front plug-in board with X86 system architecture and expansion, and is a universal board.

[0013] The signal processing unit is the FPGA software burned on the baseband signal processing board. According to the channel characteristics set by the user layer of the information processing unit, it generates a remote control signal and a ranging signal with carrier and symbol Doppler coherence, receives ranging signals and telemetry signals (high-speed telemetry) from the onboard ground-based measurement and control equipment (space-based measurement and control equipment), completes the measurement of the ranging signal, and completes the control and test of the onboard ground-based measurement and control equipment (space-based measurement and control equipment).

[0014] The information processing unit is used to control the signal processing unit to work in coordination, and complete equipment operating condition control, information frame processing, test control and display; the information processing unit is actually the host computer software running on the system board.

[0015] The information processing unit can also exchange information with the master control or other systems via Ethernet.

[0016] Preferably, the hardware circuit of the baseband signal processing board includes a clock module, an Ethernet interface, a power module, a signal processing module, an interface module, and an ADC module; the signal processing module is the core of the baseband signal processing board, the clock module provides a reference clock for it, the ADC module, the interface module, the Ethernet and the signal processing module realize information interaction, and the power module supplies power to each module of the board; wherein,

[0017] The clock module realizes the frequency synchronization of the system. The clock chip AD9552 has two signal input modes. One is to provide a 10MHz reference clock through an external device, and the other is to provide a reference clock through the 10MHz crystal oscillator that comes with the baseband signal processing board.

[0018] Ethernet is used for high-speed data interaction with the host computer software;

[0019] The power module realizes the production of different power levels required inside the baseband signal processing board;

[0020] The interface module realizes the level conversion of the hardware interface with the external device;

[0021] The ADC module baseband signal processing board reserves three channels in hardware, and uses one of the channels to complete the digital-to-analog / analog-to-digital conversion of ground-based uplink and downlink signals / space-based forward return signals;

[0022] The signal processing module adopts the dual FPGA structure of XC7Z020+XC7K325T, taking advantage of the ARM+FPGA dual-function core structure of XC7Z020 and the easy interconnection between XC7Z020 and XC7K325T, to simplify system design and improve the scalability of the software radio platform.

[0023] Preferably, the signal processing module performs signal processing functions in real time, including spreading / despreading, modulation / demodulation, encoding / decoding, channel simulation and baseband interface of each channel;

[0024] In the ground measurement and control working mode, the RF signal enters the A / D sampling, digital front-end processing, and downlink high-speed receiving channel in sequence, and finally sends the measurement information to the information processing unit through the CPCI bus; the ground-based uplink ranging signal enters the uplink ranging sending channel through the CPCI bus, and then undergoes digital back-end processing and D / A conversion in sequence to output the RF signal;

[0025] In the relay measurement and control working mode, the RF signal enters the A / D sampling, digital front-end processing, and return telemetry receiving channel in sequence, and finally sends the telemetry information to the information processing unit through the CPCI bus; the space-based forward remote control signal enters the forward remote control sending channel through the CPCI bus, and then undergoes digital back-end processing and D / A conversion in sequence to output the RF signal.

[0026] Preferably, the signal processing module includes: A / D sampling and digital front-end processing, return telemetry receiving channel, downlink high-speed receiving channel, uplink ranging transmission channel, uplink remote control transmission channel, forward remote control transmission channel, digital back-end processing and D / A conversion and baseband interface processing; wherein,

[0027] A / D sampling and digital front-end processing: complete analog signal digitization and signal orthogonal down-conversion;

[0028] Return telemetry receiving channel: mainly for space-based return signals, despreading, demodulating, decoding, data preprocessing and forwarding;

[0029] Downlink high-speed receiving channel: mainly for ground-based downlink signals, demodulates and decodes the signals. The ground-based downlink signals contain ranging information, so the telemetry signals are frame processed synchronously, the local measurement information is collected, and then the measurement information is pre-processed and sent to the information processing unit through the CPCI bus;

[0030] Uplink ranging transmission channel: mainly for ground-based uplink ranging signals, the ranging frames sent by the information processing unit through the CPCI bus are processed, spread spectrum modulated and channel simulated;

[0031] Uplink remote control transmission channel: mainly for the ground-based uplink remote control signal, the remote control frame sent by the information processing unit through the CPCI bus is processed, spread spectrum modulated and channel simulated;

[0032] Forward remote control transmission channel: mainly for space-based forward remote control signals, the remote control frames sent by the information processing unit through the CPCI bus are processed, spread spectrum modulated and channel simulated;

[0033] Digital back-end processing and D / A conversion: modulate the intermediate frequency signal to the radio frequency point and then output;

[0034] Baseband interface processing: including remote control information, regenerated remote control information, serial digital telemetry information, telemetry information, and other baseband interface information processing.

[0035] Preferably, the information processing unit is designed in two layers, namely, a user layer and a scheduling layer, according to the principle of layered design.

[0036] Preferably, the user layer is the first layer of the entire software, which implements interface functions related to user operations; the space-based / ground-based mode switching function is also configured in this layer; the functions of the user layer include:

[0037] Equipment configuration: basic parameter configuration of equipment operation. The corresponding configuration parameters are downloaded to the signal processing unit through the CPCI bus;

[0038] Channel configuration: including the configuration of uplink ranging channel, remote control channel, downlink ranging channel, telemetry channel, baseband remote control, baseband telemetry, serial telemetry, and other interfaces. Each channel contains corresponding configuration parameters, which are downloaded to the signal processing unit through the CPCI bus.

[0039] Simulation: The scheduling layer simulates the onboard measurement and control equipment and the ground remote control terminal to implement the closed-loop self-test of the integrated ground detection equipment. The configuration parameters and their status are maintained by the scheduling layer.

[0040] Test: including bit error rate test, capture range, capture time test and measurement test; test control only inputs test requests and parameters to the scheduling layer, and receives and counts the test results output by the scheduling layer. The specific test steps are implemented in the scheduling layer;

[0041] Statistics: Calculate the results of measurement and testing;

[0042] Database: stores relevant configuration and test data.

[0043] Preferably, the scheduling layer information processing unit core and the user layer configuration information are processed by channel data transmission and reception, or after data processing and channel control, and interact with the Windows device driver through the CPCI bus and the signal processing unit; the functions of each part include:

[0044] Windows device driver: realizes the data exchange interface between upper layer application and CPCI board;

[0045] Channel data sending and receiving processing: By calling the Windows underlying driver, the data sending and receiving control of each carrier channel including the uplink ranging channel, remote control channel, downlink ranging channel, telemetry channel, baseband remote control telemetry, and serial telemetry is realized. According to the channel type, an independent data sending and receiving buffer is set up for each channel;

[0046] Channel control: including capture control of receiving channels and status control of each channel, for upper-layer applications to call;

[0047] Data processing: mainly includes test data processing, measurement data processing, etc., for upper-level application calls.

[0048] Traditional space-based and ground-based testing equipment are designed for individual units on rockets, with a large number of devices, large occupied volume, and inconvenient operation. Based on the existing functions and performance indicators of telemetry and remote control testing, ground-based testing equipment adopts an integrated design to mainly realize the testing functions of space-based and ground-based measurement and control subsystems, while simplifying the scale of ground equipment and improving the efficiency of the entire rocket test.

[0049] This method proposes a space-ground integrated ground detection equipment based on the CPCI architecture. This equipment is aimed at the S-band aerospace measurement and control system and can better complete the test tasks of the space-based and ground-based measurement and control systems. The CPCI architecture adopted by the space-ground integrated ground detection equipment has the advantages of high bandwidth, independence, plug-and-play, parallel operation, and rich software resources. The equipment adopts an integrated and universal design, with space-based / ground-based mode switching function, which can meet the needs of measurement and control subsystem debugging, testing, and rapid whole-rocket testing. The AD9361 chip is used, which integrates three local oscillators, up and down mixers, amplifiers, HPA, LNA, ADC, DAC and other modules, replacing the traditional low-intermediate frequency channel module and sample point acquisition and recovery module, greatly improving the system integration and realizing the miniaturization and low power consumption of ground detection equipment.

[0050] The ground-to-earth integrated ground detection equipment of the method can work in a ground measurement and control working mode or a relay measurement and control working mode.

[0051] In the ground measurement and control working mode, the integrated ground detection equipment mainly completes the uplink channel spread spectrum modulation of the upper stage non-coherent measurement system, the downlink channel demodulation and decoding processing, and the calculation and statistics of the speed and ranging results, and realizes the exchange of ranging, speed, remote control, and telemetry information with the main control or other systems.

[0052] In the relay measurement and control working mode, the integrated ground detection equipment mainly completes the forward channel spread spectrum modulation of the traditional non-coherent spread spectrum system, the return channel despreading, demodulation and decoding processing, and realizes the remote control and telemetry information exchange with the master control or other systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a block diagram of the composition of the ground-to-earth integrated ground detection equipment in this method example;

[0054] Figure 2 This is a hardware implementation block diagram of a baseband signal processing board in this method example;

[0055] Figure 3 In this method example, the signal processing unit is composed of a block diagram;

[0056] Figure 4 In this method example, the information processing unit constitutes a block diagram. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Traditional space-based and ground-based testing equipment are designed for individual units on rockets, with a large number of devices, large occupied volume, and inconvenient operation. Based on the existing functions and performance indicators of telemetry and remote control testing, ground-based testing equipment adopts an integrated design to mainly realize the testing functions of space-based and ground-based measurement and control subsystems, while simplifying the scale of ground equipment and improving the efficiency of the entire rocket test.

[0059] This method proposes a space-ground integrated ground detection equipment based on the CPCI architecture. This equipment is aimed at the S-band aerospace measurement and control system and can better complete the test tasks of the space-based and ground-based measurement and control systems. The CPCI architecture adopted by the space-ground integrated ground detection equipment has the advantages of high bandwidth, independence, plug-and-play, parallel operation, and rich software resources. The equipment adopts an integrated and universal design, with space-based / ground-based mode switching function, which can meet the needs of measurement and control subsystem debugging, testing, and rapid whole-rocket testing. The AD9361 chip is used, which integrates three local oscillators, up and down mixers, amplifiers, HPA, LNA, ADC, DAC and other modules, replacing the traditional low-intermediate frequency channel module and sample point acquisition and recovery module, greatly improving the system integration and realizing the miniaturization and low power consumption of ground detection equipment.

[0060] The ground-to-earth integrated ground detection equipment proposed in this method, based on the CPCI architecture, adopts the CPCI architecture based on the industrial system to maximize the reliability of the equipment. The equipment built with the CPCI architecture can meet the requirements of harsh industrial and military environments, and at the same time, it provides a rich high-speed exchange bus (interface) for multiple unit modules, which greatly facilitates the development of the equipment. Its composition block diagram is as follows Figure 1 Block diagram section shown.

[0061] The hardware of a complete ground inspection terminal consists of three parts:

[0062] (1) Chassis (including passive backplane and modular power supply): reinforced 2U 19-inch standard CPCI rack-mount chassis;

[0063] (2) Main control board: standard 6U front board, X86 system architecture and expansion;

[0064] (3) Baseband signal processing board: standard 6U front plug-in board.

[0065] Since the chassis and main control board are relatively widely used, their components and accessories are easy to purchase, so this method will not be described in detail. The baseband signal processing board needs to complete the fast synchronization and reception of the received signal, data frame information processing, and the generation of the transmitted signal. For the design of the hardware part, see Figure 2, Considering that the signal needs to be received and processed under different measurement and control systems of the satellite and the ground at the same time, and the signal dynamic range caused by the relatively high-speed movement of the satellite and the ground is relatively large, a higher digital signal processing capability is required, and the processed data needs to be transmitted through a network port. Therefore, the hardware circuit adopts a software radio structure design with microprocessor + FPGA processing as the core. The microprocessor is responsible for data processing and the FPGA is responsible for signal level processing.

[0066] In order to make the designed ground inspection terminal flexible and scalable, the software design of the ground-to-ground integrated ground inspection equipment adopts the design idea of ​​joint design and collaborative work of the signal processing unit (FPGA software) and the information processing unit (host computer software). The FPGA software is burned on the baseband signal processing board.

[0067] According to the channel characteristics set by the user layer of the upper computer software, the FPGA software generates remote control signals and ranging signals with carrier and symbol Doppler coherence, receives ranging signals and telemetry signals (high-speed telemetry) from the onboard ground-based measurement and control equipment (space-based measurement and control equipment), and completes the measurement of ranging signals, thereby completing the control and testing of the onboard ground-based measurement and control equipment (space-based measurement and control equipment).

[0068] The ground detection equipment of this method adopts the integration of equipment and software resources to improve the universality of products, simplify the scale of ground equipment, improve the efficiency of information application, and realize the integration of equipment, test process and information. At the same time, modular, combined and configurable technology is adopted to support building block combination to meet the ground measurement and control needs of different models.

[0069] Figure 1 The figure shows the integrated ground-to-earth detection equipment based on CPCI architecture proposed by this method, which consists of an industrial computer chassis, a main control board, and a baseband signal processing board.

[0070] It includes: chassis, baseband signal processing board, system board, signal processing unit, information processing unit; among which,

[0071] The chassis, including a passive backplane and a modular power supply, is a reinforced 2U 19-inch standard CPCI rack-mounted chassis;

[0072] The baseband signal processing board generates a remote control signal and a ranging signal, and sends the signals to the ground-based measurement and control equipment or the space-based measurement and control equipment on the satellite; receives the ranging signal and the telemetry signal from the ground-based measurement and control equipment or the space-based measurement and control equipment on the satellite, and completes the measurement of the ranging signal, thereby completing the control and test of the ground-based measurement and control equipment on the satellite;

[0073] The system board is a standard 6U front plug-in board with X86 system architecture and expansion, and is a universal board.

[0074] The signal processing unit is the FPGA software burned on the baseband signal processing board. According to the channel characteristics set by the user layer of the information processing unit, it generates a remote control signal and a ranging signal with carrier and symbol Doppler coherence, receives ranging signals and telemetry signals (high-speed telemetry) from the onboard ground-based measurement and control equipment (space-based measurement and control equipment), completes the measurement of the ranging signal, and completes the control and test of the onboard ground-based measurement and control equipment (space-based measurement and control equipment).

[0075] The information processing unit is used to control the signal processing unit to work together to complete equipment condition control, information frame processing, test control and display; the information processing unit is actually the host computer software running on the system board. The information processing unit can also exchange information with the master control or other systems through Ethernet.

[0076] Figure 2 This is the hardware implementation block diagram of the baseband signal processing board. The hardware circuit of the baseband signal processing board includes a clock module, an Ethernet interface, a power module, a signal processing module, an interface module, and an ADC module.

[0077] The signal processing module is the core of the baseband signal processing board. The clock module provides it with a reference clock. The ADC module, interface module, Ethernet and signal processing module realize information interaction. The power module provides power for each module of the board.

[0078] The specific functions of each module are as follows: The clock module realizes the frequency synchronization of the system. The clock chip AD9552 has two signal input modes, one is to provide a 10MHz reference clock through an external device, and the other is to provide a reference clock through the 10MHz crystal oscillator of the baseband signal processing board. Ethernet is used for high-speed data interaction with the host computer software. The power module realizes the generation of different levels of power required inside the baseband signal processing board. The interface module realizes the level conversion of the hardware interface with the external device. The ADC module baseband signal processing board reserves 3 channels in hardware. This method only uses one of the channels. The ADC module completes the digital-to-analog / analog-to-digital conversion of the ground-based uplink and downlink signals / space-based forward return signals. The core chip AD9361 of the ADC module is a highly integrated chip launched by Analog, which integrates three local oscillators, up and down mixers, amplifiers, HPA, LNA, ADC, DAC and other modules, replacing the traditional low intermediate frequency channel module and sample point acquisition and recovery module, greatly improving the integration of the system, and realizing miniaturization and low power consumption. The signal processing module adopts the dual FPGA structure of XC7Z020+XC7K325T, taking advantage of the ARM+FPGA dual-function core structure of XC7Z020 and the easy interconnection between XC7Z020 and XC7K325T, to simplify system design and improve the scalability of the software radio platform.

[0079] The signal processing unit software carried on the baseband signal processing board, the composition block diagram is shown in Figure 3 , complete the signal processing functions in real time, mainly including spreading / despreading, modulation / demodulation, encoding / decoding, channel simulation and baseband interface of each channel.

[0080] In the ground measurement and control working mode, the RF signal enters the A / D sampling, digital front-end processing, and downlink high-speed receiving channel in sequence, and finally sends the measurement information to the information processing unit through the CPCI bus; the ground-based uplink ranging signal (ground-based uplink remote control signal) enters the uplink ranging sending channel (uplink remote control sending channel) through the CPCI bus, and then undergoes digital back-end processing and D / A conversion in sequence to output the RF signal.

[0081] In the relay measurement and control working mode, the RF signal enters the A / D sampling, digital front-end processing, and return telemetry receiving channel in sequence, and finally sends the telemetry information to the information processing unit through the CPCI bus; the space-based forward remote control signal enters the forward remote control sending channel through the CPCI bus, and then undergoes digital back-end processing and D / A conversion in sequence to output the RF signal.

[0082] Figure 3 The block diagram of the signal processing unit is shown below. The detailed functions of each part of the above signal processing unit are as follows:

[0083] (1) A / D sampling and digital front-end processing: complete analog signal digitization and signal orthogonal down-conversion;

[0084] (2) Return telemetry receiving channel: mainly for space-based return signals, despreading, demodulating and decoding the signals (completing carrier synchronization, code chip synchronization and symbol synchronization) and data preprocessing and forwarding (sending the processed data to the information processing unit through the CPCI bus in the agreed format);

[0085] (3) Downlink high-speed receiving channel: It mainly demodulates and decodes the ground-based downlink signal (completes carrier synchronization, code chip synchronization and symbol synchronization). The ground-based downlink signal contains ranging information, so the telemetry signal is frame processed synchronously, the local measurement information is collected, and then the measurement information is pre-processed and sent to the information processing unit through the CPCI bus;

[0086] (4) Uplink ranging transmission channel: mainly for ground-based uplink ranging signals, the ranging frames sent by the information processing unit through the CPCI bus are processed, spread spectrum modulated and channel simulated;

[0087] (5) Uplink remote control transmission channel: mainly for the ground-based uplink remote control signal, the remote control frame sent by the information processing unit through the CPCI bus is processed, spread spectrum modulated and channel simulated;

[0088] (6) Forward remote control transmission channel: mainly for space-based forward remote control signals, the remote control frames sent by the information processing unit through the CPCI bus are processed, spread spectrum modulated and channel simulated;

[0089] (7) Digital back-end processing and D / A conversion: modulate the intermediate frequency signal to the radio frequency point and then output;

[0090] (8) Baseband interface processing: including remote control information, regenerated remote control information, serial digital telemetry information, telemetry information, and other baseband interface information processing.

[0091] Figure 4 The block diagram of the information processing unit. The information processing unit is used to control the signal processing unit to work together to complete equipment condition control, information frame processing, test control and display. The information processing unit is actually the host computer software running on the main control board. In order to ensure the maintainability and scalability of the host computer software, according to the principle of layered design, the host computer software is divided into two layers: the user layer and the scheduling layer.

[0092] The user layer is the first layer of the entire software, which implements interface functions related to user operations. The space-based / ground-based mode switching function is also configured in this layer. The functions of the user layer mainly include:

[0093] (1) Equipment configuration: basic parameters of equipment operation are configured. The corresponding configuration parameters are downloaded to the signal processing unit through the CPCI bus.

[0094] (2) Channel configuration (uplink ranging channel configuration, remote control channel configuration, downlink ranging channel configuration, telemetry channel configuration, baseband remote control configuration, baseband telemetry configuration, serial telemetry configuration, and other interfaces): Each channel contains corresponding configuration parameters, which are downloaded to the signal processing unit through the CPCI bus;

[0095] (3) Simulation: The scheduling layer simulates the onboard measurement and control equipment (ground-based measurement and control equipment / space-based measurement and control equipment) and the ground remote control terminal (remote control frame simulation, etc.) to implement the closed-loop self-test of the integrated ground detection equipment. The configuration parameters and their status are maintained by the scheduling layer.

[0096] (4) Test: including bit error rate test, capture range, capture time test and measurement test. Test control only inputs test requests and parameters to the scheduling layer, and receives and counts the test results output by the scheduling layer. The specific test steps are implemented in the scheduling layer;

[0097] (5) Statistics: statistics of the measurement and test results;

[0098] (6) Database: stores relevant configuration and test data.

[0099] The above-mentioned equipment configuration, channel configuration, simulation, test and statistical functions exist in parallel in the user interface and can be configured by the user.

[0100] The scheduling layer is the core processing unit of the host computer software. The user layer configuration information is processed through channel data transmission and reception, or through data processing and channel control, and interacts with the Windows device driver through the CPCI bus and the signal processing unit. The detailed functions of each part include:

[0101] (1) Windows device driver: implements the data exchange interface between the upper-layer application and the CPCI board (baseband signal processing board);

[0102] (2) Channel data transmission and reception processing: By calling the Windows underlying driver, the data transmission and reception control of each carrier channel (uplink ranging channel, remote control channel, downlink ranging channel, telemetry channel, baseband remote control and telemetry, serial telemetry) is realized. According to the channel type, an independent data transmission and reception buffer is set up for each channel;

[0103] (3) Channel control: including capture control of the receiving channel and status control (collection) of each channel for upper-layer application calls;

[0104] (4) Data processing: mainly includes test data processing, measurement data processing, etc., for upper-level application calls.

[0105] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A ground-to-earth integrated ground detection device based on CPCI architecture, characterized in that: include: Chassis, baseband signal processing board, system board, signal processing unit, information processing unit; wherein, The chassis is a reinforced 2U 19-inch standard CPCI rack-mounted chassis; The baseband signal processing board generates a remote control signal and a ranging signal, and sends the signals to the ground-based measurement and control equipment or the space-based measurement and control equipment on the satellite; receives the ranging signal and the telemetry signal from the ground-based measurement and control equipment or the space-based measurement and control equipment on the satellite, and completes the measurement of the ranging signal, thereby completing the control and test of the ground-based measurement and control equipment on the satellite; The system board is a standard 6U front board with X86 architecture and expansion; The signal processing unit generates a remote control signal and a ranging signal with carrier and symbol Doppler coherence according to the channel characteristics set by the user layer of the information processing unit, receives ranging signals and telemetry signals from the onboard ground-based measurement and control equipment or the space-based measurement and control equipment, and completes the measurement of the ranging signal, and completes the control and test of the onboard ground-based measurement and control equipment or the space-based measurement and control equipment; The information processing unit is used to control the signal processing unit to work in coordination, and complete equipment operating condition control, information frame processing, test control and display.

2. The integrated ground detection equipment based on CPCI framework according to claim 1 is characterized in that: The hardware circuit of the baseband signal processing board includes a clock module, an Ethernet interface, a power supply module, a signal processing module, an interface module, and an ADC module; The signal processing module is the core of the baseband signal processing board, the clock module provides it with a reference clock, the ADC module, the interface module, the Ethernet and the signal processing module realize information interaction, and the power module provides power for each module of the board; The clock module realizes the frequency synchronization of the system. The clock chip AD9552 has two signal input modes. One is to provide a 10MHz reference clock through an external device, and the other is to provide a reference clock through the 10MHz crystal oscillator that comes with the baseband signal processing board. Ethernet is used for high-speed data interaction with the host computer software; The power module realizes the production of different power levels required inside the baseband signal processing board; The interface module realizes the level conversion of the hardware interface with the external device; The ADC module baseband signal processing board reserves three channels in hardware, and uses one of the channels to complete the digital-to-analog / analog-to-digital conversion of ground-based uplink and downlink signals / space-based forward return signals; The signal processing module adopts the dual FPGA structure of XC7Z020+XC7K325T, taking advantage of the ARM+FPGA dual-function core structure of XC7Z020 and the easy interconnection between XC7Z020 and XC7K325T, to simplify system design and improve the scalability of the software radio platform.

3. The integrated ground detection equipment based on CPCI framework according to claim 2 is characterized in that: The signal processing module completes the signal processing functions in real time, including spread spectrum / despread spectrum, modulation / demodulation, encoding / decoding, channel simulation and baseband interface of each channel; In the ground measurement and control working mode, the RF signal enters the A / D sampling, digital front-end processing, and downlink high-speed receiving channel in sequence, and finally sends the measurement information to the information processing unit through the CPCI bus; the ground-based uplink ranging signal enters the uplink ranging sending channel through the CPCI bus, and then undergoes digital back-end processing and D / A conversion in sequence to output the RF signal; In the relay measurement and control working mode, the RF signal enters the A / D sampling, digital front-end processing, and return telemetry receiving channel in sequence, and finally sends the telemetry information to the information processing unit through the CPCI bus; the space-based forward remote control signal enters the forward remote control sending channel through the CPCI bus, and then undergoes digital back-end processing and D / A conversion in sequence to output the RF signal.

4. The integrated ground detection equipment based on CPCI framework according to claim 3 is characterized in that: The signal processing module includes: A / D sampling and digital front-end processing, return telemetry receiving channel, downlink high-speed receiving channel, uplink ranging transmission channel, uplink remote control transmission channel, forward remote control transmission channel, digital back-end processing and D / A conversion and baseband interface processing; wherein, A / D sampling and digital front-end processing: complete analog signal digitization and signal orthogonal down-conversion; Return telemetry receiving channel: mainly for space-based return signals, despreading, demodulating, decoding, data preprocessing and forwarding; Downlink high-speed receiving channel: mainly for ground-based downlink signals, demodulates and decodes the signals. The ground-based downlink signals contain ranging information, so the telemetry signals are frame processed synchronously, the local measurement information is collected, and then the measurement information is pre-processed and sent to the information processing unit through the CPCI bus; Uplink ranging transmission channel: mainly for ground-based uplink ranging signals, the ranging frames sent by the information processing unit through the CPCI bus are processed, spread spectrum modulated and channel simulated; Uplink remote control transmission channel: mainly for ground-based uplink remote control signals, the remote control frames sent by the information processing unit through the CPCI bus are processed, spread spectrum modulated and channel simulated; Forward remote control transmission channel: mainly for space-based forward remote control signals, the remote control frames sent by the information processing unit through the CPCI bus are processed, spread spectrum modulated and channel simulated; Digital back-end processing and D / A conversion: modulate the intermediate frequency signal to the radio frequency point and then output; Baseband interface processing: including remote control information, regenerated remote control information, serial digital telemetry information, telemetry information, and other baseband interface information processing.

5. The integrated ground detection equipment based on CPCI framework according to claim 1 is characterized in that: The information processing unit is designed based on the principle of layered design and is divided into two layers: the user layer and the scheduling layer.

6. The integrated ground detection equipment based on CPCI framework according to claim 5 is characterized in that: The user layer is the first layer of the entire software, which implements interface functions related to user operations; The space-based / ground-based mode switching function is also configured at this layer; the functions of the user layer include: Equipment configuration: basic parameters configuration of equipment operation. The corresponding configuration parameters are downloaded to the signal processing unit through CPCI bus; Channel configuration: including the configuration of uplink ranging channel, remote control channel, downlink ranging channel, telemetry channel, baseband remote control, baseband telemetry, serial telemetry, and other interfaces. Each channel contains corresponding configuration parameters, which are downloaded to the signal processing unit through the CPCI bus. Simulation: The scheduling layer simulates the onboard measurement and control equipment and the ground remote control terminal to implement the closed-loop self-test of the integrated ground detection equipment. The configuration parameters and their status are maintained by the scheduling layer. Test: including bit error rate test, capture range, capture time test and measurement test; test control only inputs test requests and parameters to the scheduling layer, and receives and counts the test results output by the scheduling layer. The specific test steps are implemented in the scheduling layer; Statistics: Calculate the results of measurement and testing; Database: stores relevant configuration and test data.

7. The integrated ground detection equipment based on CPCI architecture according to claim 1 is characterized in that: The core of the scheduling layer information processing unit, the user layer configuration information is processed through the channel data sending and receiving, or after data processing and channel control, it interacts with the Windows device driver through the CPCI bus and the signal processing unit; The functions of each part include: Windows device driver: realizes the data exchange interface between upper layer application and CPCI board; Channel data sending and receiving processing: By calling the Windows underlying driver, the data sending and receiving control of each carrier channel including the uplink ranging channel, remote control channel, downlink ranging channel, telemetry channel, baseband remote control telemetry, and serial telemetry is realized. According to the channel type, an independent data sending and receiving buffer is set up for each channel; Channel control: including capture control of receiving channels and status control of each channel, for upper-layer applications to call; Data processing: mainly includes test data processing, measurement data processing, etc., for upper-level application calls.

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