Satellite-borne digital-analog hybrid communication system based on VPX standard

Abstract

The invention relates to the field of spaceflight, in particular to a VPX standard-based satellite-borne digital-analog hybrid communication system, which comprises an interaction panel, a management and control module, a function module, a signal plane and a power supply module, the interaction panel comprises a front panel and a back panel; the management and control module is connected with the interaction panel and the function module and is used for integrating management strategies and communication protocols, limiting specific task functions and monitoring working states; the function module is installed on the backboard, interacts with external equipment and is used for executing specific task functions. The signal plane comprises a data plane, a control plane and a management plane; the power supply module is connected with the control module, the function module and the signal plane. High-speed digital-analog mixing is achieved in a single communication terminal, the standardization and universality degree of a communication system is improved, signal separation of a data plane, a management plane and a control plane is achieved, digital-analog signal interference can be effectively avoided, certain design flexibility is achieved, the development period is shortened, and development expenditure is reduced.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and in particular to a satellite-borne digital-analog hybrid communication system based on the VPX standard. Background Art

[0002] Space-based communications rely on satellite platforms to build a cross-domain interconnected system that can undertake a variety of communication tasks. Its main goal is to build a low-latency, highly reliable space-based information network. The satellite-borne communication terminal is the core component of the space-based communication subsystem. It mainly realizes the link-building function of space-based communications at the link layer and the communication function at the physical layer. It can achieve random access and two-way communication on multiple frequency bands, and can cooperate with antennas to achieve wide-beam scanning multiple access and narrow-beam response. It can support a variety of communication modes through direct expansion system, frequency hopping system, digital transmission system, broadcast distribution system, etc.

[0003] The application scenarios of satellite communication terminals require high reliability and high integration of a single machine and the ability to adapt to the electromagnetic environment of space. At present, satellite communication terminals designed in the field of space communication generally distribute digital functions and analog radio frequency functions on different single machines, and cannot achieve digital-analog mixing on a single communication terminal. The satellite communication system provided by the present invention realizes high-speed digital-analog mixing on a single terminal, which can meet the requirements of complex application scenarios, and realizes the separation of data plane, control plane and management plane at the design level, and also realizes the physical isolation of analog signals and digital signals through radio frequency direct connection, effectively avoiding digital-analog interference. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and provide a satellite-borne digital-analog hybrid communication system based on the VPX standard, including an interactive panel, a control module, a functional module, a signal plane and a power module: The interactive panel includes a front panel for interaction between the communication system and external devices and a back panel for interaction between modules within the communication system; The control module is connected with the interactive panel and the functional module to integrate management strategies and communication protocols, define specific task functions and monitor working status; The functional module is mounted on the back panel and interacts with external devices through the interface of the front panel to perform specific task functions; The signal plane includes a data plane, a control plane, and a management plane, which are used to establish a data exchange topology network supporting different transmission rates; The power supply module is connected to the management and control module, the functional module and the signal plane to provide electrical energy.

[0005] Preferably, the front panel adopts interconnection interfaces including radio frequency interface, optical port and Gigabit Ethernet interface for high-speed interconnection with external devices, and the interfaces other than the radio frequency interface in the interconnection interface adopt a single-star, dual-star or mesh structure topology.

[0006] Preferably, the control module includes a state management slave module and a master control slave module; The state management slave module is used to collect the hardware physical state of the internal modules of the communication system when they are working, and report it to the main control slave module to assist in control decision-making; The main control slave module receives and analyzes the control instructions sent by the host computer and the physical state of the hardware to comprehensively obtain a control decision, which is used to make and send a specific control decision, and sends the control instructions to the functional module.

[0007] Preferably, the data plane is used to realize high-speed interconnection between communication system modules, and the data plane adopts a topological structure including a single star, a dual star or a mesh structure; The control plane is used to realize medium-speed interconnection between communication system modules, and the control plane adopts a topological structure including a single star, a dual star or a mesh structure; The management plane is used to realize low-speed interconnection between communication system modules, and the I2C bus protocol is used in the communication system module to realize hardware physical status collection. The management plane adopts a star or bus type internal topology structure.

[0008] Preferably, the functional module comprises a function realization slave module for realizing the task defined by the functional module and a slave control module for executing the control instruction issued by the master management slave module in the control module.

[0009] Preferably, the power module is input with external direct current through the front panel, which is converted into secondary direct current in the power module and output to the back panel, and is powered by the module connected to the communication system through the back panel, and the power switch control of the functional module is realized through the relay in the power module and the control interface on the front panel.

[0010] Preferably, the control module is powered by the secondary direct current through the backplane, and is extended through a low-speed interface by a control interface chip and control software in the control module to the front panel to receive the control instruction; In the control module, the high-speed interface is extended through the control interface chip and the control software to the front panel for business data transmission; In the control module, the low-speed interface (i.e., discrete quantity interface and control serial port) is extended through the control interface chip and the control software to lead out to the backplane to control the functional module; In the control module, the high-speed interface is extended through the control interface chip and the control software to lead out to the backplane to interact with the functional module for data.

[0011] Preferably, the signal plane is powered by the secondary direct current through the backplane, and is led out to the backplane through a signal interface chip and a signal software extended low-speed interface (discrete quantity interface and signal serial port) to receive the control instructions and feed back the working status to the status management slave module.

[0012] Preferably, the data plane receives a digital signal from an analog-to-digital conversion module in the communication system, or sends a digital signal to the analog-to-digital conversion module for signal conversion, so as to perform a signal processing function.

[0013] Preferably, the slave control plane receives the control instruction of the master control module and executes according to the control instruction; The slave management plane monitors the working status of the signal plane and reports it to the status management slave module at regular intervals.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention separates the overall functions of the communication system into functions to be implemented by each module, and divides the three sub-signal planes of data, control, and management according to the different roles of each module in signal transmission, thereby realizing signal separation of the data plane, control plane, and management plane. The present invention physically isolates analog signals and digital signals through direct connection of radio frequency lines, and realizes high-isolation digital-analog mixing in the data plane. The satellite-borne digital-analog hybrid communication system has high reliability and high integration, can adapt to the space electromagnetic environment, and has certain scalability. It can realize the link establishment function of space-based communication at the link layer and the communication function at the physical layer, and meets the design index requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0016] Figure 1 A schematic diagram of the module architecture of a satellite-borne digital-analog hybrid communication system based on the VPX standard of the present invention; Figure 2 A schematic diagram of the module structure of a satellite-borne digital-analog hybrid communication system based on the VPX standard of the present invention; Figure 3 This is a schematic diagram of the power module architecture of the present invention; Figure 4 This is a diagram of the management and control module architecture of the present invention; Figure 5 The intermediate frequency module architecture diagram of the present invention; Figure 6 This is a diagram of the radio frequency module architecture of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0018] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0019] The satellite communication system provided in this embodiment realizes high-speed digital-analog hybrid on a single terminal, which can meet the requirements of complex application scenarios, and realizes the separation of data plane, control plane and management plane at the design level. It also realizes the physical isolation of analog signals and digital signals through radio frequency direct connection, effectively avoiding digital-analog interference. The communication system can be used as a design reference for the same type of high-speed digital-analog hybrid communication terminals with satellite application scenarios and similar design requirements, and provides a more general design idea for high-performance communication terminals in complex space environments.

[0020] See also Figure 1 and Figure 2 As shown, this embodiment provides a satellite-borne digital-analog hybrid communication system based on the VPX standard, including an interactive panel, a control module, a functional module, a signal plane and a power module: The interactive panel includes a front panel for the communication system to interact with external devices and a back panel for the internal modules of the communication system to interact. Specifically, in this embodiment, the front panel is connected to the RF module A and the RF module B through the RF interface, and is connected to the power module through the power supply interface. The back panel is connected to the RF module A, the intermediate frequency module A, the RF module B, the intermediate frequency module B, and the control module through the interactive interface, and is connected to the power module through the power supply interface. The control module is connected with the interactive panel and the functional module to integrate management strategies and communication protocols, define specific task functions and monitor working status. Specifically, in this embodiment, the control module is connected with the front panel through an interactive interface; The functional module is mounted to the backplane and interacts with external devices through the interface of the front panel to perform specific task functions. Specifically, in this embodiment, the functional module is mounted to the backplane through a VITA connector; The signal plane includes a data plane, a control plane, and a management plane, which are used to establish a data exchange topology network supporting different transmission rates. Specifically, in this embodiment, the signal plane includes a radio frequency module A, an intermediate frequency module A, a radio frequency module B, and an intermediate frequency module B, and the data plane of the radio frequency module A is connected to the data plane of the intermediate frequency module B, the data plane of the radio frequency module A is connected to the data plane of the intermediate frequency module A, the data plane of the intermediate frequency module A is connected to the data plane of the intermediate frequency module B, the data plane of the intermediate frequency module A is connected to the data plane of the radio frequency module B, the slave control plane (control plane) of the radio frequency module A, the radio frequency module B, the intermediate frequency module A, and the intermediate frequency module B is connected to the master control plane, and the slave management plane (management plane) of the radio frequency module A, the radio frequency module B, the intermediate frequency module A, and the intermediate frequency module B is connected to the master management plane; The power module is connected to the management and control module, the functional module and the signal plane to provide electrical energy. Specifically, in this embodiment, the power module is connected to the management and control module, the functional module and the signal plane through a backplane.

[0021] Preferably, the front panel uses interconnection interfaces including radio frequency interface, optical port, Gigabit Ethernet interface for high-speed interconnection with external devices, and the interfaces other than the radio frequency interface in the interconnection interface adopt a single-star, dual-star or mesh structure topology.

[0022] Preferably, the control module includes a state management slave module and a master control slave module; The state management slave module is used to collect the hardware physical state of the internal modules of the communication system when they are working, and report it to the main control slave module to assist in control decision-making. Specifically, in this embodiment, the state management master module (state management slave module) monitors the working state of this module and other functional modules, and regularly reports the upper computer to assist in control decision-making in the form of telemetry data. The control module also has an on-orbit reconstruction function. If the program of the functional module is abnormal, the on-orbit reconstruction module with anti-single-particle upset reads the program data from the storage chip to reconstruct the program of the functional module, thereby realizing the anti-single-particle upset reinforcement function; The main control slave module receives and parses the control instructions issued by the host computer and the physical state of the hardware to comprehensively derive control decisions, which are used to make and issue specific control decisions, and issue control instructions to the functional modules. Specifically, in this embodiment, the main control slave module (main control module) receives and parses the remote control instructions of the host computer, and issues them to the slave control module of the functional module to execute the control function.

[0023] Preferably, the data plane is used to realize high-speed interconnection between communication system modules, and the data plane adopts a topological structure including a single star, a dual star or a mesh structure; The control plane is used to achieve medium-speed interconnection between communication system modules. The control plane adopts a topological structure including single-star, dual-star or mesh structure; The management plane is used to realize low-speed interconnection between communication system modules. The I2C bus protocol is used in the communication system module to realize hardware physical status collection. The management plane adopts a star or bus internal topology.

[0024] Preferably, the functional module includes a function realization slave module for realizing the task defined by the functional module and a slave control module for executing the control instructions issued by the master management slave module in the management and control module.

[0025] See also Figure 3 As shown, the power module takes external direct current as input through the front panel, converts it into secondary direct current in the power module and outputs it to the backplane, connects to the module of the communication system through the backplane for power supply, and realizes power switch control of the functional module through the relay in the power module and the control interface on the front panel. Specifically, in this embodiment, the power module takes external 28V primary direct current as input through the front panel, converts it into 12V, 5V secondary direct current in the module and outputs it to the backplane, connects to other functional modules through the backplane to power them, realizes power switch control of other functional modules through the relay in the module and the control interface (OC gate) on the front panel, and tantalum capacitors and ceramic capacitors are installed on the power interfaces of all functional modules and the backplane for power filtering.

[0026] See also Figure 4 As shown, the control module is powered by secondary DC power through the backplane, and is extended to the front panel through the control interface chip and the control software in the control module to receive control instructions. Specifically, in this embodiment, the control module is powered by 5V secondary DC output by the power module through the backplane, and is extended to the front panel through the interface chip and the software to receive remote control instructions and feedback telemetry data. In the control module, the high-speed interface is extended through the control interface chip and the control software to the front panel for business data transmission. Specifically, in this embodiment, the high-speed interface (ETH network port, LVDS, optical port) is extended through the interface chip and software to the front panel for business data transmission; In the management and control module, the low-speed interface (i.e., discrete quantity interface and management and control serial port) is extended through the management and control interface chip and the management and control software to lead out to the backplane control function module. Specifically, in this embodiment, the high-speed interface (ETH network port, LVDS, optical port) is extended through the interface chip and software in the management and control module to lead out to the front panel for business data transmission; in the module, the discrete quantity interface and RS422 serial port are extended through the interface chip and software to lead out to the backplane to control other function modules, and the LVDS interface and SRIO interface are extended to lead out to the backplane and other function modules for data interaction.

[0027] Preferably, the signal plane is powered by secondary direct current through the backplane, and is led out to the backplane through the signal interface chip, signal software expansion discrete quantity interface and signal serial port to receive control instructions and feedback the working status to the status management slave module.

[0028] Preferably, the data plane receives a digital signal from an analog-to-digital conversion module in the communication system, or sends a digital signal to the analog-to-digital conversion module for signal conversion, so as to perform a signal processing function.

[0029] Preferably, the control plane receives control instructions from the master control slave module and executes according to the control instructions; The slave management plane monitors the working status of the signal plane and reports it to the status management slave module at regular intervals.

[0030] See also Figure 5 As shown, the intermediate frequency module is powered by 12V secondary DC output by the power module through the backplane, and is extended through the interface chip and software. The discrete quantity interface and RS422 serial port are led out to the backplane to receive control signals and feedback the working status. The extended LVDS interface and SRIO interface are led out to the backplane to interact with other functional modules for data; it is directly connected to the integrated RF module through a direct RF line, and directly interacts with the integrated RF module to simulate the intermediate frequency signal.

[0031] The functions of the intermediate frequency module are divided into intermediate frequency processing module, slave control module and state management slave module. The intermediate frequency processing module performs intermediate frequency signal processing, receives digital signals from the analog-to-digital conversion module, sends the digital signals to be sent to the digital-to-analog conversion module and converts them into intermediate frequency signals for transmission. The analog-to-digital / digital-to-analog conversion module directly exchanges intermediate frequency analog signals with the radio frequency module through the radio frequency line; the slave control module receives control instructions from the main control module (main control slave module) and executes control according to the instructions; the state management slave module monitors the working status of this module and reports it to the state management master module at regular intervals.

[0032] See also Figure 6 As shown in the figure, the RF module is powered by 12V secondary DC output by the power module through the back panel, and receives / sends RF signals through the dedicated RF interface on the front panel; the module is led out to the back panel to receive control signals and feedback working status through the software expansion discrete quantity interface and RS422 serial port; it is directly connected to the intermediate frequency module through the direct RF line, and directly interacts with the intermediate frequency module to simulate the intermediate frequency signal. During debugging, the signal connection relationship between the integrated RF module and the intermediate frequency module can be flexibly adjusted through the direct RF line.

[0033] The functions of the RF module are divided into frequency conversion module, slave control module, and state management slave module. The frequency conversion module implements up and down frequency conversion functions, down-converting the RF signal from the antenna to the intermediate frequency and sending it to the intermediate frequency module, and up-converting the intermediate frequency signal from the intermediate frequency module to the RF and sending it to the antenna. The RF frequency and the number of transceiver channels are controlled by the slave control module; the slave control module receives control instructions from the main control module and executes state control and beam control functions; the state management slave module monitors the working status of this module and reports it to the state management master module at regular intervals.

[0034] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A satellite-borne digital-analog hybrid communication system based on the VPX standard, characterized in that: Including interactive panel, control module, functional module, signal plane and power module: The interactive panel includes a front panel for interaction between the communication system and external devices and a back panel for interaction between modules within the communication system; The control module is connected with the interactive panel and the functional module to integrate management strategies and communication protocols, define specific task functions and monitor working status; The functional module is mounted on the back panel and interacts with external devices through the interface of the front panel to perform specific task functions; The signal plane includes a data plane, a control plane, and a management plane, which are used to establish a data exchange topology network supporting different transmission rates; The power supply module is connected to the management and control module, the functional module and the signal plane to provide electrical energy.

2. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 1, characterized in that: The front panel adopts interconnection interfaces including radio frequency interface, optical port and Gigabit Ethernet interface for high-speed interconnection with external devices, and the interfaces other than the radio frequency interface in the interconnection interface adopt a single star, dual star or mesh structure topology.

3. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 2, characterized in that: The control module includes a state management slave module and a master control slave module; The state management slave module is used to collect the hardware physical state of the internal modules of the communication system when they are working, and report it to the main control slave module to assist in control decision-making; The main control slave module receives and analyzes the control instructions sent by the host computer and the physical state of the hardware to comprehensively derive a control decision, which is used to make and send a specific control decision, and sends the control instructions to the functional module.

4. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 3, characterized in that: The data plane is used to realize high-speed interconnection between communication system modules, and the data plane adopts a topological structure including a single star, a dual star or a mesh structure; The control plane is used to realize medium-speed interconnection between communication system modules, and the control plane adopts a topological structure including a single star, a dual star or a mesh structure; The management plane is used to realize low-speed interconnection between communication system modules and to collect the physical status of hardware. The management plane adopts a star or bus internal topology.

5. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 4, characterized in that: The functional module includes a function realization slave module for realizing the task defined by the functional module and a slave control module for executing the control instruction issued by the master management slave module in the management and control module.

6. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 5, characterized in that: The power module is input with external direct current through the front panel, which is converted into secondary direct current in the power module and output to the back panel, and is connected to the module of the communication system through the back panel for power supply, and the power switch control of the functional module is realized through the relay in the power module and the control interface on the front panel.

7. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 6, characterized in that: The control module is powered by the secondary direct current through the backplane, and is extended through a low-speed interface by a control interface chip and control software in the control module to the front panel to receive the control instruction; In the control module, the high-speed interface is extended through the control interface chip and the control software to the front panel for business data transmission; In the control module, the low-speed interface is extended through the control interface chip and the control software to lead out to the backplane to control the functional module; In the control module, the high-speed interface is extended through the control interface chip and the control software to lead out to the backplane to interact with the functional module for data.

8. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 7, characterized in that: The signal plane is powered by the secondary direct current through the backplane, and is led out to the backplane through a signal interface chip and a signal software extended low-speed interface to receive the control instructions and feed back the working status to the status management slave module.

9. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 8, characterized in that: The data plane receives a digital signal from an analog-to-digital conversion module in the communication system, or sends a digital signal to the analog-to-digital conversion module for signal conversion, so as to perform a signal processing function.

10. The onboard digital-analog hybrid communication system based on the VPX standard according to claim 9, characterized in that: The slave control plane receives the control instruction of the main control module and executes according to the control instruction; The slave management plane monitors the working status of the signal plane and reports it to the status management slave module at regular intervals.

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