CN108322273B - Ground test equipment for flight data chain - Google Patents
Ground test equipment for flight data chain Download PDFInfo
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- CN108322273B CN108322273B CN201810022666.5A CN201810022666A CN108322273B CN 108322273 B CN108322273 B CN 108322273B CN 201810022666 A CN201810022666 A CN 201810022666A CN 108322273 B CN108322273 B CN 108322273B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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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
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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Abstract
The embodiment of the invention provides ground test equipment for a flight data link, and belongs to the technical field of communication. The method comprises the following steps: a signal processing subsystem and an antenna feed subsystem; the signal processing subsystem comprises a main control and human-computer interaction module, a digital signal processing module, a digital interface processing module, a frequency synthesizer, an up-down frequency conversion module, a back plate connecting module and a power supply module; the digital signal processing module, the digital interface processing module, the frequency synthesizer and the up-down frequency conversion module are respectively connected with the main control and human-computer interaction module and the power supply module through the back plate connecting module; the digital signal processing module is used for transmitting a control signal to the digital interface processing module; the requirements of multiple special test items of the flight data chain can be met, and the motion range of the flight data chain can be covered. In addition, the whole structure is simple, the cost is low, and the test stability is good.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a ground test device for a flight data chain.
Background
With the development of communication technology, the data link has gradually highlighted its role as a technology for linking various combat platforms, optimizing information resources, efficiently allocating and using combat energy. The data link is used for establishing a data link relation among multiple points so as to realize synchronous command and guidance. Each originally closed platform and independent individual are closely linked together through a data chain, so that the capacity of cooperative work is achieved. In order to ensure the normal operation of the data chain system, the importance of the data chain test is more and more obvious. The data link technology has the advantages of long distance, data information transmission, cooperative use and the like, so that the data link technology is widely applied to the field of flight navigation. The data link end machine is a core unit of the data link system, and is not only responsible for communication between null and null, and between ground and null, but also has a relation to the effectiveness of resource sharing. The data chain system is a large military integrated electronic information system, can be used for realizing data information exchange, and is used for constructing a data chain network with a specific architecture based on a communication medium, connecting two or more than two control devices with a test system, and realizing the high-efficiency interaction of data information between platforms through readable data information on the test devices. For a flight data chain, a flight data chain ground test device is urgently needed at present to meet the requirements of multiple special test items of the flight data chain.
Disclosure of Invention
To address the above problems, embodiments of the present invention provide an airborne data link ground test apparatus that overcomes, or at least partially solves, the above problems.
According to an aspect of the embodiments of the present invention, there is provided an aerial data link ground test device, including: a signal processing subsystem and an antenna feed subsystem; the signal processing subsystem comprises a main control and human-computer interaction module, a digital signal processing module, a digital interface processing module, a frequency synthesizer, an up-down frequency conversion module, a back plate connecting module and a power supply module; the digital signal processing module, the digital interface processing module, the frequency synthesizer and the up-down frequency conversion module are respectively connected with the main control and human-computer interaction module and the power supply module through the back plate connecting module; the digital signal processing module is used for transmitting a control signal to the digital interface processing module; the digital interface processing module is used for providing an interface for the outside; the frequency synthesizer and up-down frequency conversion module is used for providing a synchronous reference clock signal for the digital signal processing module and realizing the conversion among a baseband processing signal, an intermediate frequency transceiving signal and a radio frequency transceiving signal; the frequency synthesizer and the up-down frequency conversion module are used for realizing the conversion from the medium-frequency transceiving signals to the radio-frequency transceiving wired signals; and the antenna feed subsystem is used for realizing the conversion from the radio frequency receiving and transmitting wired signals to the radio frequency receiving and transmitting wireless signals.
The ground test equipment for the flight data chain provided by the embodiment of the invention has the advantages of simple structure, low cost and good test stability; the requirements of various special test items of the flight data link can be met, wherein the special test items comprise a wired/wireless transmitting communication mode, a wired/wireless receiving communication mode and a wireless networking communication mode; the beam angles of the receiving and transmitting antennas are adjustable and can cover the motion range of the flight data link; the performance of a receiving and transmitting mode is stable, the harmonic wave and the spurious suppression of an output signal exceed 45dBc, and the noise coefficient of a receiver is lower than 6 dB; the digital Doppler frequency of the transmitted signal can be adjusted, the range can reach 600kHz, the minimum stepping is 30Hz, and the Doppler change of the flight data link can be virtually realized; the measurement precision is high, and the frequency precision of the transmitted signal can be better than 0.1 ppm; the environmental adaptability of the ground test equipment can be ensured through environmental adaptability screening experiments including random vibration experiments, temperature cycle experiments, high/low temperature experiments, sports car experiments (namely long-distance transportation) and the like; the replaceability of a hardware part can be realized, and if the hardware of a product fails, the corresponding board card can be directly replaced; the method can directly realize various test modes and process test data through upper computer software on the blade computer, is convenient for real-time monitoring and is easy to operate.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of embodiments of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a flight data chain ground test device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a digital signal processing board according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a digital interface processing board according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an rf signal processing module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an rf transceiver module according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating an operating principle of an rf transceiver module according to an embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the examples of the present invention, but are not intended to limit the scope of the examples of the present invention.
The embodiment of the invention provides a ground test device for a flight data link, and referring to fig. 1, the ground test device comprises: a signal processing subsystem and an antenna feed subsystem; the signal processing subsystem comprises a main control and human-computer interaction module, a digital signal processing module, a digital interface processing module, a frequency synthesizer, an up-down frequency conversion module, a back plate connecting module and a power supply module; the digital signal processing module, the digital interface processing module, the frequency synthesizer and the up-down frequency conversion module are respectively connected with the main control and human-computer interaction module and the power supply module through the back plate connecting module;
the digital signal processing module is used for transmitting a control signal to the digital interface processing module; the digital interface processing module is used for providing an interface for the outside; the frequency synthesizer and up-down frequency conversion module is used for providing a synchronous reference clock signal for the digital signal processing module and realizing the conversion among a baseband processing signal, an intermediate frequency transceiving signal and a radio frequency transceiving signal; the frequency synthesizer and the up-down frequency conversion module are used for realizing the conversion from the medium-frequency transceiving signals to the radio-frequency transceiving wired signals; and the antenna feed subsystem is used for realizing the conversion from the radio frequency receiving and transmitting wired signals to the radio frequency receiving and transmitting wireless signals.
According to the device provided by the embodiment of the invention, a user can select a corresponding test module for testing on upper computer software, wherein the test module comprises a 1553B connectivity test module, a node constant-receiving test module, a node constant-sending test module, a node antenna configuration test module, a networking test module and a comprehensive test module. In the test module, only under the comprehensive test module, the ground test equipment is controlled by test sending control, namely the test sending control realizes the control of the test equipment by sending a time synchronization instruction, a mode configuration instruction and the like to an upper computer, and further realizes the networking and data information interaction between the test equipment and the nodes. The test modules except the comprehensive test do not relate to the control of test and launch control, and the upper computer directly issues instructions to the FPGA to realize the control of the test equipment. Meanwhile, in the testing process, a user can monitor the testing state and the testing data information in real time on a human-computer interaction interface, and the functions of storing, recording, printing and the like are realized.
The frequency synthesizer, the up-down frequency conversion module and the antenna feed subsystem can form a radio frequency signal generating module together so as to realize the conversion from the intermediate frequency signal to a radio frequency wired transceiving signal and a radio frequency wireless transceiving signal. And performing radio frequency transceiving of wireless signals through the antenna feed subsystem. Data receiving and sending in the flight data chain are mainly completed in a radio frequency receiving and sending module in a radio frequency signal processing module, when wireless data information is received through an antenna feed subsystem, the data information is processed through the radio frequency signal processing module of the FPGA and is uploaded to an upper computer through a serial port, and then the data information is processed, displayed, stored and the like through the upper computer. The power supply module supplies power to all subsystems of the whole system. Under the cooperative work of all the modules, as an alternative embodiment, the working mode of the device can be divided into a sending communication mode, a receiving communication mode or a wireless networking communication mode. The antenna feed subsystem comprises a radio frequency front end, a receiving and transmitting antenna, a matched pointing adjustable mechanism and the like.
The sending communication mode may be a wired or wireless sending communication mode. If the working mode of the device is a transmission communication mode, the device is in any one of the following four transmission states, namely a wired transmission protocol waveform, a wired transmission test waveform, a wireless transmission protocol waveform and a wireless transmission test waveform.
If the working mode of the equipment is a receiving communication mode, the equipment is in a wired receiving state or a wireless receiving state. At this time, the device is in a receiving state and can receive and demodulate data through two connection states of wired and wireless according to a communication protocol, and the functions of data reporting, data displaying and the like are completed.
And if the working mode of the equipment is the wireless networking communication mode, the equipment is in an active node test state or a passive node test state. At this time, the apparatus implements switching of transmission and reception states by a Time Division Duplex (TDD) manner. In the active node test state, the device is used as an active node to perform time slot granting operation on a DUT (device under test). In the passive node test state, the device serves as a passive node to receive and communicate the time slot granted by the DUT.
As an optional embodiment, the main control and human-computer interaction module is used for generating and collecting baseband signals, intermediate frequency signals, radio frequency wired signals and radio frequency wireless signals, and is also used for testing a flight data chain. The main control and man-machine interaction module can adopt a 3U blade processor of ADLINK. And the blade computer runs human-computer interaction software to realize the control of the user on the test equipment and the interpretation of the test result. The user can control the test equipment through the main control and man-machine interaction module, so that the generation and the acquisition of baseband signals, intermediate frequency signals, radio frequency wired signals and radio frequency wireless signals are realized, and the test of a data chain is completed.
The blade computer can provide a human-computer interaction interface, can monitor the interaction state of the data information of the whole test system in real time, and also provides the functions of updating, storing, printing and the like of the test data in real time. The corresponding test mode can be selected and the corresponding radio frequency parameters can be configured according to the requirements of a user through upper computer software in the blade computer.
As an alternative embodiment, the digital signal processing module is used for generating and receiving a high-speed interface signal and a low-speed interface signal, and is used for generating a baseband sending signal and collecting a baseband receiving signal. Specifically, the digital signal processing module may include a digital signal processing board, and the structure of the digital signal processing board may be as shown in fig. 2. The FPGA in the digital signal processing board card is used for bearing the generation and the receiving of high-speed interface signals and low-speed interface signals, meanwhile, two DA (digital-analog) boards arranged on the digital signal processing board card can generate two paths of baseband sending signals, and the high-speed AD arranged on the digital signal processing board card is used for collecting baseband receiving signals. And the clock externally connected with the radio frequency module provides a high-stability clock for the AD/DA through a clock distribution signal on the board. Wherein, the clock rate of DA is 1.5Gsps, and the clock rate of AD is 500 Msps. The mode of receiving and transmitting baseband signals is time division duplex, the signal center frequency is 175Mhz, and the signal bandwidth is 30 Mhz. The digital signal processing board card provides digital signal processing, including generation and acquisition of intermediate frequency signals, generation of control signals, and implementation of a core algorithm.
As an alternative embodiment, the digital interface processing module may comprise a digital interface processing board, which may be configured as shown in fig. 3. According to actual requirements, the system needs to provide various external interfaces, and the digital interface part is realized through a digital interface processing board card. The digital interface processing board card and the digital signal processing board card can transmit control signals through a connecting line of J30J-100. The control signal is accessed to the digital interface processing board card through the J30J interface, and is output to the radio frequency control interfaces RF _ ctrl and 1553B external interfaces after level conversion. Two different bridge circuits are designed for the 1553B external interface to serve as main backup, and gating can be performed according to requirements.
As an alternative embodiment, the frequency synthesizer and up-down conversion module comprises a radio frequency signal processing module; the radio frequency signal processing module comprises a signal processing channel and an antenna feeder module; the signal processing channel is an intermediate frequency signal processing and/or radio frequency signal processing channel; the signal processing channel is used for providing a synchronous reference clock signal for the digital signal processing module and also used for realizing the conversion among a baseband processing signal, an intermediate frequency transceiving signal and a radio frequency transceiving signal; and the antenna feeder module is used for receiving and transmitting different signals.
The radio frequency signal processing module completes the conversion, power amplification, sending, receiving and processing of signals. The signals referred to herein are intermediate frequency signals, radio frequency signals, and the like.
For example, the signal processing channel may include 1 frequency synthesizer module, 1 rf signal processing module, 1 if signal processing module, 1 power supply module, and 1 control module. The frequency synthesis module provides local oscillation signals for the up-down frequency conversion channel 1/2, and provides a system clock for the baseband signal generation board card; the frequency synthesis module has the function of internal and external clock same source reference switching. The radio frequency signal processing module realizes the conversion from the AD/DA signal to the radio frequency transceiving signal. The intermediate frequency signal processing module realizes the switching from the AD/DA signal to the intermediate frequency transceiving signal. The power module gets electricity from the CPCIe connector. The control module realizes the control of the internal modules of the system. The signal processing channel can meet the requirements of high and low temperature and vibration.
As an alternative embodiment, the signal processing channel comprises a frequency synthesizer module, a control module and a signal processing module; the signal processing module is an intermediate frequency signal processing and/or radio frequency signal processing module; the frequency synthesis module is used for providing local oscillation signals for the up-down frequency conversion channel and providing system clock signals for generating baseband signals; the signal processing module is used for converting the baseband processing signals into radio frequency transceiving signals and/or converting the baseband processing signals into intermediate frequency transceiving signals; and the control module is used for realizing the control of the frequency synthesis module and the signal processing module.
As an alternative embodiment, the antenna feeder module includes a radio frequency front end, a transceiver antenna, a power supply and a feeder line. Wherein the transceiving antenna can be protected by a radome and is mounted on a height-adjustable mechanical support. The antenna feeder module can meet the requirements of high and low temperature and vibration.
As an optional embodiment, the radio frequency signal processing module further comprises a radio frequency transceiver module; and the radio frequency transceiving module is used for transceiving signals and finishing the operation control of system test, the display of test results and the indication of test states. According to the working principle of the radio frequency transceiving module, the radio frequency transceiving module is divided into two independent channels of radio frequency receiving and transmitting, and a radio frequency port is externally connected with a transceiving antenna after being connected with the end through a duplexer. The radio frequency receiving and transmitting channels with the same receiving and transmitting frequency can realize the conversion between the radio frequency and the intermediate frequency through the two-stage up-down frequency conversion relation with reversible frequency. In order to improve the signal isolation, the receiving and transmitting are switched by adopting a switch, a non-current working link power supply is closed according to a receiving and transmitting time division duplex working mode, and meanwhile, in order to realize loop self test of a receiving and transmitting channel, loop switching of a radio frequency loop signal is realized at an output end through two SPDT switches, and automatic program control switching of signal power and gain is realized through ATT.
The rf signal processing module converts the baseband processing signal into the intermediate frequency test signal and the rf test signal, and provides a clock for the digital signal processing board, and a schematic structural diagram of the rf signal processing module is shown in fig. 4. The rf signal processing module includes two parts, namely, the signal processing channel and the antenna feeder module in the above embodiment. The signal processing channel can be packaged into a CPCIe 6U transverse plugboard card and occupies 2 slot positions. The antenna feed module comprises a radio frequency front end, a receiving and transmitting antenna, a corresponding power supply and a control, and is packaged into a customized structure. The radio frequency signal processing module can meet various functional requirements, including high and low temperature and vibration requirements; all the component modules can have a standby function, and the standby of the radio frequency module can be realized through an external instruction; the receiving channel can have a gain control function, and the gain control of the receiving channel can be realized through an external instruction; the sending channel can have a gain control function, and the gain control of the sending channel is realized through an external instruction; the radio frequency transmitting channel and the radio frequency receiving channel can adopt a time division multiplexing mode, can control the receiving and transmitting switching through an external control signal, and keep a receiving and transmitting self-closed loop test mode; the frequency synthesis module can provide a working clock for the baseband signal processing module; the frequency synthesis module has functions of receiving an external reference signal and locking a local oscillator to the external reference signal besides the internal reference source, and the internal reference source is powered off at the moment; the antenna can be provided with open circuit and short circuit protection of the antenna, power amplifier overheat protection, power supply overvoltage protection and the like.
The radio frequency receiving and transmitting module in the radio frequency signal processing module partially completes the signal receiving and transmitting tasks of the system, and the upper computer software running on the blade computer can complete the operation control, the test result display, the state indication and other tasks of the system test, such as the configuration and the transmission of radio frequency parameters under different test modes, whether networking is successful or not and the like.
As an optional embodiment, the radio frequency transceiver module includes a frequency synthesizer unit, an up-conversion unit, a down-conversion unit, a power amplifier unit, a pre-preselection and amplification unit, a transceiver loop test unit, a duplexer unit, a transmitting intermediate frequency unit, a receiving intermediate frequency unit, a monitoring and communication unit, and a power supply unit;
the frequency synthesis unit is used for generating a broadband frequency sweeping local oscillator signal and a synchronous reference clock signal required by the digital signal processing module, filtering and amplifying the signals and outputting the signals; the up-conversion unit is used for realizing the conversion from the intermediate frequency transceiving signal to the radio frequency transceiving signal; the down-conversion unit is used for realizing the conversion from the radio frequency transceiving signal to the intermediate frequency transceiving signal; the power amplification unit is used for amplifying the frequency of the transmitted signal; the pre-preselection and amplification unit is used for pre-preselection of a received signal, AGC detection and low-noise amplification; the receiving and transmitting loop test unit is used for carrying out loop test on the signal receiving and transmitting channel; the duplexer unit is used for realizing the two-way communication of the radio frequency transceiving signals; the transmitting intermediate frequency unit is used for realizing gain adjustment and band-pass filtering of an intermediate frequency input signal; the receiving intermediate frequency unit is used for realizing gain amplification, filtering and AGC processing of intermediate frequency signals generated by down conversion; and the monitoring and communication unit is used for monitoring the working state of the radio frequency function and configuring working parameters. A schematic structural diagram of the rf transceiver module can be shown in fig. 5.
Specifically, the frequency synthesizer unit mainly generates a broadband frequency sweeping local oscillator signal (stepping 1KHz) and a synchronous reference clock signal required by the digital signal acquisition board card, and outputs the signals after filtering and amplifying. The method mainly comprises the following steps: OCXO, VCO, PLL, amplifier, switch filter, etc.
The up-conversion unit mainly realizes the conversion from an intermediate frequency signal to a radio frequency signal, and the up-conversion unit adopts two-stage frequency mixing according to design requirements. In addition, the up-conversion unit also comprises band-pass filtering and amplification processing for each intermediate frequency, and mainly comprises circuits such as frequency mixing, amplification, filtering, program-controlled attenuation and the like. The down-conversion unit mainly converts the real radio frequency signal into an intermediate frequency signal. According to the usage scenario that the transceiver does not work simultaneously, the down-conversion frequency conversion relationship is the inverse process of the up-conversion unit, and is not described herein again. Similarly, the down-conversion unit mainly comprises circuits of frequency mixing, amplifying, filtering, program-controlled attenuation and the like.
The power amplification unit realizes the amplification of the transmitted signal power to more than 25dBm (cable loss and antenna gain are reduced), and the power amplification unit mainly comprises a secondary power amplifier, a peripheral circuit and an ALC circuit. The pre-preselection and amplification unit realizes pre-preselection, AGC detection and low-noise amplification of a received signal, and controls the noise of a receiving link to be lower than 4 dB. The unit mainly comprises a detection circuit, a switch filter bank and a low-noise amplification circuit.
The receiving and transmitting loop test unit realizes loop test of a module receiving and transmitting channel, the core is realized through an SPDT switch, the channel switching of radio frequency transmitting and receiving signals and a duplexer and a receiving and transmitting link is realized, namely, the switch is switched to a receiving and transmitting port of the duplexer in normal work, and the receiving and transmitting signals are respectively switched to an upper frequency conversion unit and a lower frequency conversion unit in a loop test mode (non-working state) so as to realize loop self-check test of the receiving and transmitting signals in the module. The duplexer unit realizes the two-way communication of the radio frequency transmitting and receiving signals and mainly consists of 2 groups of same-frequency filters.
The transmitting intermediate frequency unit realizes gain adjustment and band-pass filtering of an intermediate frequency input signal, controls the level of the input signal, ensures that the linear index of the mixer meets the requirement, and mainly comprises circuits such as attenuation, filtering and the like. The receiving intermediate frequency unit realizes gain amplification, filtering and AGC processing of intermediate frequency signals generated by down conversion, at least realizes a gain adjustment range of 30dB and out-of-band suppression filtering of 80dB, and mainly comprises circuits such as amplification, filtering, attenuation and the like.
The monitoring and communication unit mainly realizes the monitoring of the working state and the configuration of working parameters of the radio frequency function, automatically completes the power-on self-test, the temperature monitoring, the ALC and the AGC of the module, realizes the RS232 communication with an upper computer and is a control center of the whole module; the unit is built by taking an FPGA and peripheral circuits thereof as cores, and monitoring and configuration programs are embedded in the unit. The power supply unit provides various voltages required by the module operation, such as +9V, + 24V, +5V, +3.3V, +1.2V and the like; the high-voltage DC/DC power supply mainly comprises a DC/DC, LDO, EMI filtering, overcurrent and overvoltage protection circuit and the like.
The rf transceiver module adopts a transceiving time-sharing half-duplex mode, and in order to simplify the circuit scale and improve the module reliability, the rf transceiver module adopts the same frequency conversion relationship of up-down frequency conversion to realize the maximum utilization of the frequency synthesis module, and the schematic diagram of the working principle is shown in fig. 6.
The ground test equipment for the flight data chain provided by the embodiment of the invention has the advantages of simple structure, low cost and good test stability; the requirements of various special test items of the flight data link can be met, wherein the special test items comprise a wired/wireless transmitting communication mode, a wired/wireless receiving communication mode and a wireless networking communication mode; the beam angles of the receiving and transmitting antennas are adjustable and can cover the motion range of the flight data link; the performance of a receiving and transmitting mode is stable, the harmonic wave and the spurious suppression of an output signal exceed 45dBc, and the noise coefficient of a receiver is lower than 6 dB; the digital Doppler frequency of the transmitted signal can be adjusted, the range can reach 600kHz, the minimum stepping is 30Hz, and the Doppler change of the flight data link can be virtually realized; the measurement precision is high, and the frequency precision of the transmitted signal can be better than 0.1 ppm; the environmental adaptability of the ground test equipment can be ensured through environmental adaptability screening experiments including random vibration experiments, temperature cycle experiments, high/low temperature experiments, sports car experiments (namely long-distance transportation) and the like; the replaceability of a hardware part can be realized, and if the hardware of a product fails, the corresponding board card can be directly replaced; the method can directly realize various test modes and process test data through upper computer software on the blade computer, is convenient for real-time monitoring and is easy to operate.
Finally, the apparatus of the present application is only a preferred embodiment and is not intended to limit the scope of the embodiments of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.
Claims (7)
1. An airborne data link ground test apparatus, comprising: a signal processing subsystem and an antenna feed subsystem; the signal processing subsystem comprises a main control and human-computer interaction module, a digital signal processing module, a digital interface processing module, a frequency synthesizer, an up-down frequency conversion module, a back plate connecting module and a power supply module; the digital signal processing module, the digital interface processing module, the frequency synthesizer and the up-down frequency conversion module are respectively connected with the main control and man-machine interaction module and the power supply module through the backboard connecting module;
the digital signal processing module is used for transmitting a control signal to the digital interface processing module; the digital interface processing module is used for providing an interface to the outside; the frequency synthesizer and up-down frequency conversion module is used for providing a synchronous reference clock signal for the digital signal processing module and realizing the conversion among a baseband processing signal, an intermediate frequency transceiving signal and a radio frequency transceiving signal; the frequency synthesis module and the up-down frequency conversion module are used for realizing the conversion from the medium-frequency transceiving signals to the radio-frequency transceiving wired signals; the antenna feed subsystem is used for realizing the conversion from the radio frequency receiving and transmitting wired signals to the radio frequency receiving and transmitting wireless signals;
the working mode of the equipment is a sending communication mode, a receiving communication mode or a wireless networking communication mode;
if the working mode of the equipment is a sending communication mode, the equipment is in any one of the following four sending states, wherein the following four sending states are respectively a wired sending protocol waveform, a wired sending test waveform, a wireless sending protocol waveform and a wireless sending test waveform;
if the working mode of the equipment is a receiving communication mode, the equipment is in a wired receiving state or a wireless receiving state;
if the working mode of the equipment is a wireless networking communication mode, the equipment is in an active node test state or a passive node test state;
the main control and man-machine interaction module is used for generating and collecting baseband signals, intermediate frequency signals, radio frequency wired signals and radio frequency wireless signals and is also used for testing a flight data chain.
2. The apparatus of claim 1, wherein the digital signal processing module is configured to generate and receive a high speed interface signal and a low speed interface signal, and to generate a baseband transmit signal and collect a baseband receive signal.
3. The apparatus of claim 1, wherein the frequency synthesizer and up-down conversion module comprises a radio frequency signal processing module; the radio frequency signal processing module comprises a signal processing channel and an antenna feeder module; the signal processing channel is an intermediate frequency signal processing and/or radio frequency signal processing channel;
the signal processing channel is used for providing a synchronous reference clock signal for the digital signal processing module and also used for realizing conversion among a baseband processing signal, an intermediate frequency transceiving signal and a radio frequency transceiving signal; and the antenna feeder module is used for receiving and transmitting different wireless signals.
4. The apparatus of claim 3, wherein the signal processing channel comprises a frequency synthesizer module, a control module, and a signal processing module; the signal processing module is an intermediate frequency signal processing and/or radio frequency signal processing module; the frequency synthesis module is used for providing local oscillation signals for the up-down frequency conversion channel and providing system clock signals for generating baseband signals;
the signal processing module is used for converting the baseband processing signal into a radio frequency transceiving signal and/or converting the baseband processing signal into an intermediate frequency transceiving signal; and the control module is used for realizing the control of the frequency synthesis module and the signal processing module.
5. The apparatus of claim 3, wherein the antenna feed module comprises a radio frequency front end, a transceiver antenna, a power source, and a feed line.
6. The apparatus of claim 3, wherein the radio frequency signal processing module further comprises a radio frequency transceiver module; the radio frequency transceiving module is used for transceiving signals and finishing the operation control of system test, the display of test results and the indication of test states.
7. The device of claim 6, wherein the radio frequency transceiver module comprises a frequency synthesizer unit, an up-converter unit, a down-converter unit, a power amplifier unit, a pre-preselection and amplification unit, a transmit-receive loop test unit, a duplexer unit, a transmit intermediate frequency unit, a receive intermediate frequency unit, a monitor and communication unit, and a power supply unit;
the frequency synthesis unit is used for generating a broadband frequency sweeping local oscillator signal and a synchronous reference clock signal required by the digital signal processing module, and outputting the signals after filtering and amplifying; the up-conversion unit is used for realizing the conversion from the intermediate frequency transceiving signal to the radio frequency transceiving signal; the down-conversion unit is used for realizing conversion from the radio frequency transceiving signal to the intermediate frequency transceiving signal; the power amplification unit is used for amplifying the frequency of the transmitted signal; the pre-preselection and amplification unit is used for pre-preselection of a received signal, AGC detection and low-noise amplification; the receiving and transmitting loop test unit is used for carrying out loop test on the signal receiving and transmitting channel; the duplexer unit is used for realizing the two-way communication of the radio frequency transceiving signals; the transmitting intermediate frequency unit is used for realizing gain adjustment and band-pass filtering of an intermediate frequency input signal; the receiving intermediate frequency unit is used for realizing gain amplification, filtering and AGC processing of intermediate frequency signals generated by down conversion; and the monitoring and communication unit is used for monitoring the working state of the radio frequency function and configuring working parameters.
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| CN110995559B (en) * | 2019-12-10 | 2021-08-24 | 西安云维智联科技有限公司 | Wired carrier network construction method |
| CN111025342A (en) * | 2019-12-13 | 2020-04-17 | 航天神舟飞行器有限公司 | Method for testing performance and Align data precision of Beidou board card of unmanned aerial vehicle |
| CN112333041A (en) * | 2020-10-23 | 2021-02-05 | 上海航天测控通信研究所 | Space air-to-air communication testing device |
| CN114337866A (en) * | 2022-01-04 | 2022-04-12 | 北京电子工程总体研究所 | Aircraft communication testing arrangement and system |
| CN116582164B (en) * | 2023-07-07 | 2023-10-20 | 四川九洲空管科技有限责任公司 | Multimode ground aviation communication radio station |
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