CN115833862A - Digital-analog compatible radio transceiver for aviation sonar buoy - Google Patents
Digital-analog compatible radio transceiver for aviation sonar buoy Download PDFInfo
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- CN115833862A CN115833862A CN202211250960.4A CN202211250960A CN115833862A CN 115833862 A CN115833862 A CN 115833862A CN 202211250960 A CN202211250960 A CN 202211250960A CN 115833862 A CN115833862 A CN 115833862A
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Abstract
The invention relates to a digital-analog compatible radio transceiver for an aviation sonar buoy, which belongs to the technical field of buoys and can be used for various sonar buoys with different communication systems and different transmitting power requirements; carrying out analog or digital modulation on the underwater detection signal, carrying out power amplification, and radiating through an antenna; and receiving the wireless remote control command through the antenna, carrying out analog or digital analysis on the command, and outputting an analysis command. The device comprises a digital-analog compatible signal generating module (1), a power switchable amplifying module (2), a duplex matching module (3), a transmitting and receiving antenna (4) and a digital-analog compatible instruction receiving module (5). The invention is used for solving the uplink and downlink bidirectional data communication of the aviation sonar buoy and solving the problem of hardware compatibility of different communication systems of various sonar buoys.
Description
Technical Field
The invention belongs to the technical field of sonar buoys, and particularly relates to an aviation sonar buoy digital-analog compatible radio transceiver.
Background
An aviation sonobuoy is underwater target detection equipment, signals detected by an underwater sensor need to be sent to airborne receiving and processing equipment through a radio uplink, and a traditional sonobuoy adopts a radio communication system which is unidirectional, frequency division multiple access and a simulation frequency modulation system. With the development of the sonobuoy technology, the sonobuoy is required to be capable of receiving a remote control command signal of an airplane in real time while finishing uploading the signal, and is used for changing the working depth, the pulse form and the like of an underwater extension set. The radio communication link is changed from one-way to two-way, for example, the technology of the internet of things is adopted, signals can be received when the signals are better, but the working environment of the buoy is mostly free of base stations for communication.
Disclosure of Invention
In view of this, the present invention provides a digital-analog compatible radio transceiver for an aviation sonobuoy, which solves the compatibility problem of the transceiver for the aviation sonobuoy in full duplex uplink and downlink communication, the analog system sonobuoy and the digital system sonobuoy.
The utility model provides a compatible radio transceiver of aviation sonar buoy digifax, buoy include surface of water electronics cabin, and the main control board is installed to surface of water electronics cabin, main control board and the communication of electron cabin under water, including antenna, digifax compatible signal generation module, the changeable amplifier module of power, duplex matching module, digifax compatible instruction receiving module, the antenna includes antenna module, wherein:
the antenna can receive and send signals, and the signals are communicated in two directions through the antenna module duplex matching module;
the duplex matching module is used for impedance matching and filtering of signals;
the digital-analog compatible instruction receiving module can be in bidirectional communication with the duplex matching module to realize analog demodulation and digital demodulation;
the power switchable amplification module is suitable for buoys with different power requirements and can be used for power switching in a matching manner;
the digital-analog compatible signal generating module enables the buoy to generate signals and transmit the signals through the antenna module.
The invention has the beneficial effects that:
the device provided by the scheme enables the buoy to be used for various sonobuoys with different communication systems and different transmission power requirements, and the external sonobuoys work parameter setting device selects the sonobuoys to work in different transmission systems, different transmission powers and different receiving systems; carrying out analog or digital modulation on the underwater detection signal, carrying out power amplification, and radiating through an antenna; and receiving the wireless remote control command through the antenna, carrying out analog or digital analysis on the command, and outputting an analysis command. The problem of hardware compatibility of an aviation sonobuoy uplink and downlink full duplex communication and an analog system sonobuoy and digital system sonobuoy transceiver is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of an implementation of the present invention;
FIG. 2 is a block diagram of a digital-to-analog compatible signal generation module implementation of the present invention;
FIG. 3 is a block diagram of a power switchable amplification module implementation of the present invention;
FIG. 4 is a schematic diagram of a duplex matching module implementation of the present invention;
fig. 5 is a schematic diagram of a transmit receive antenna implementation of the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without inventive step, are intended to be within the scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to or other than one or more of the aspects set forth herein.
The digital-analog compatible radio transceiver device of the aviation sonar buoy shown in fig. 1 comprises a water surface electronic cabin, a main control board is installed in the water surface electronic cabin, the main control board is communicated with the underwater electronic cabin and comprises an antenna 4, a digital-analog compatible signal generating module 1, a power switchable amplifying module 2, a duplex matching module 3 and a digital-analog compatible instruction receiving module 5, the antenna 4 comprises an antenna module, and as shown in fig. 5, the antenna is a transceiving antenna, wherein:
the antenna can receive and send signals, and the signals are communicated in two directions through the antenna module duplex matching module;
a duplex matching module for impedance matching (e.g., impedance matching of the antenna module and the power switchable amplification module) and filtering of signals;
the digital-analog compatible instruction receiving module can be in two-way communication with the duplex matching module to realize analog demodulation and digital demodulation;
the power switchable amplification module is suitable for buoys with different power requirements and can switch power in a matching manner;
and the digital-analog compatible signal generating module enables the buoy to generate signals and transmit the signals through the antenna module.
Aeronautical sonobuoys typically include the old five-model sonobuoys (passive omnidirectional, passive directional, active omnidirectional, warm-depth, sea-noise) and the new four-model sonobuoys (vertical line array, horizontal extended array, active directional, acoustic source). The communication system and the transmitting power of each type of buoy have different requirements, and the radio transceiver of the novel buoy can be compatible with the current working system, realize modularization and generalization and is beneficial to reducing the hardware cost of the buoy, so that the device has the receiving and transmitting performance of signals, for example, underwater detection signals are subjected to analog or digital modulation by a digital-analog compatible signal generating module, power amplification is carried out, and radiation is carried out by a transmitting and receiving antenna; meanwhile, a radio remote control instruction is received through the transmitting and receiving antenna, the instruction is subjected to analog or digital demodulation through the digital-analog compatible instruction receiving module, and an analytic instruction is output and used for remotely setting the working state of the sonobuoy. The buoy receiving device can work in a full-duplex working mode, and can be compatible with different buoy transmitting modes, transmitting power and receiving modes.
As a specific implementation manner provided by the present disclosure, the digital-analog compatible signal generating module uses a software radio architecture composed of an FPGA chip and a DAC, and completes encoding and modulating an underwater detection signal at a baseband (for example, processing signals of an underwater electronic cabin and a hydrophone), and directly converts the baseband signal into a radio frequency band after modulation without secondary frequency conversion or frequency multiplication, wherein after the buoy is powered on, the digital-analog compatible signal generator reads a working mode and switches the signal to an analog modulation manner or a digital modulation manner, so as to implement compatibility of the analog sonar buoy and the digital sonar buoy, specifically, as shown in fig. 2,
the digital-analog compatible instruction receiving module comprises a power supply, a crystal oscillator, a frequency synthesizer, an FPGA chip, a digital-analog converter DAC, a Low Noise Amplifier (LNA) and a filter, wherein the power supply, the crystal oscillator, the frequency synthesizer, the FPGA chip and the DAC are powered on, and the LNA and the filter are arranged on the same side of the low noise amplifier, wherein:
the FPGA chip controls a crystal oscillator to generate a basic clock signal, frequency modulation is carried out through a frequency synthesizer, signal conversion is carried out through a digital-to-analog converter (DAC), signal amplification is carried out through a Low Noise Amplifier (LNA), and the amplified electric signal is input to a filter for filtering;
when the signal is transmitted, the signal generated by the buoy is input to the power switchable amplification module through the filter, and the power switchable amplification module performs matching power switching according to the type of the buoy.
The oscillator, the filter and the up-conversion needed for generating radio emission signals are all realized by DDS, FIR and DUC algorithms in the chip, the modulation and the frequency conversion are all completed on software, and the software module multiplexing is realized. After the power-on, the digital-analog compatible signal generation module reads the working mode to generate an analog modulation signal or a digital modulation signal, the low-noise amplifier amplifies the DAC signal to ensure that the signal power can drive the power amplification module, and the 4-order LC low-pass filter performs a low-pass filter on the amplified signal to prevent harmonic waves and stray signals from entering the power amplification module.
As a specific implementation manner provided in the present disclosure, as shown in fig. 3, the power switchable amplifying module is controlled by the digital-analog compatible signal generating module, and the power switchable amplifying module includes a first-stage LDMOS transistor and a first-stage LDMOS transistor that form a cascode circuit, for example, the cascode circuit and the bias power supply in the prior art are used for setting, and the bias power supply is controlled to adjust an amplifying coefficient of the cascode circuit, where:
after the power-on, the digital-analog compatible signal generating module reads power transmission gear setting parameters, the TTL level control signal is used for controlling the working voltage of the first-stage LDMOS tube and the first-stage LDMOS tube, high-level, medium-level and low-level transmission power switching is achieved, the compatibility of power amplification of an analog buoy and a digital buoy is achieved, specifically, the digital-analog compatible signal generating module comprises an input low-pass filter circuit, a first-stage amplifying circuit, a second-stage amplifying circuit and an output low-pass filter circuit, the amplifying function is achieved by adopting two stages of high-efficiency LDMOS tubes, the low-pass filter circuit performs low-pass filtering on radio frequency signals generated by the digital-analog compatible signal generator, and harmonic waves and stray signals are prevented from entering the amplifying module to generate intermodulation signals. The output circuit carries out 30dB filtering on stray signals which are generated or amplified by the power amplification module and fall on an instruction receiving frequency band, a shielding case of the power amplification module is integrally formed and processed by adopting 1mm thick copper, and the shielding case is reliably connected with a printed board through welding. The back of the amplifying module is exposed with copper through the window and is tightly attached to the mounting structural part, so that good heat dissipation is realized. The power switching is realized by controlling the working voltage of the drain electrode of the two-stage LDMOS transistor by two triodes.
As a specific implementation manner provided in the present disclosure, as shown in fig. 4, the duplex matching module is composed of a low-pass filter, a high-pass filter, a sound table filter, and a matching circuit, wherein:
the processing circuit of the low-pass wave trap comprises a seven-order low-pass filter circuit, and the processing circuit performs 50dB inhibition on stray signals of the power switchable amplification module so that the digital-analog compatible signal generation module works in a full-duplex mode; without performing a transmit/receive switching operation
The high-pass filter adopts a parallel resonant circuit, and the high-pass filter and the acoustic surface filter jointly isolate the transmitting signal by 70 dB;
the matching circuit is a five-order low-difference-loss low-pass filter circuit, wherein:
the duplex matching module carries out impedance matching on the transmitting and receiving antenna and the power switchable amplification module, so that the standing-wave ratio of a transmitting full frequency band is lower than 2, the signal communication of the power amplification module is ensured, the effective radiation of the antenna is improved, and the radiation efficiency is improved.
As a specific implementation mode provided by the scheme, the antenna is a transmitting-receiving antenna and comprises a radiating oscillator and a grounding array, wherein the length of the radiating array is lambda/4 of the central frequency, and the length of the grounding array is lambda/16;
the antenna module antenna is connected with the duplex matching module, the transmitting end and the receiving end of the antenna share one antenna, and a frequency division multiplexing mode is adopted. In a full duplex mode, transmission and reception do not affect each other.
As a specific implementation manner provided by the present disclosure, the digital-analog compatible instruction receiving module employs a dedicated monolithic integrated circuit to implement analog demodulation and digital demodulation, after being powered on, the digital-analog compatible instruction receiver reads demodulation operating parameters, and switches a radio frequency signal to a corresponding monolithic dedicated integrated circuit through a radio frequency switch to implement analog demodulation or digital demodulation, or the digital-analog compatible instruction receiving module employs a high-sensitivity dedicated monolithic integrated circuit, and is controlled by the digital-analog compatible signal generating module, after being powered on, the signal generating module sends configuration operating parameters to the instruction receiving module, controls the instruction receiving module to operate at a corresponding frequency, demodulation mode, and communication rate, controls the radio frequency switch to switch the radio frequency signal to the corresponding monolithic dedicated integrated circuit to implement analog demodulation and digital demodulation, and the monolithic dedicated integrated circuit sends an instruction receiving result to the signal generating module, and sends an instruction signal power strength RSSI measurement result to the signal generating module, and the RSSI is finally uploaded through an uplink radio link through the signal generating module to form communication distance closed-loop judgment.
Compared with a buoy in a traditional mode, the technical scheme of the scheme realizes the functions of receiving and transmitting signals in a wireless mode. The buoy is divided into an aviation sonar buoy and a marine sonar buoy, the marine sonar buoy generally adopts a base station for communication, but in an area without base station communication, the device provided by the invention can still realize the function of transmitting and receiving signals.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a compatible radio transceiver of aviation sonar buoy digifax, buoy include surface of water electronics cabin, and the main control board is installed to surface of water electronics cabin, main control board and the communication of electron cabin under water, its characterized in that: including antenna, the compatible signal generation module of digifax, the changeable amplification module of power, duplex matching module, the compatible instruction receiving module of digifax, the antenna includes antenna module, wherein:
the antenna can receive and send signals, and the signals are communicated in two directions through the antenna module duplex matching module;
the duplex matching module is used for impedance matching and filtering of signals;
the digital-analog compatible instruction receiving module can be in bidirectional communication with the duplex matching module to realize analog demodulation and digital demodulation;
the power switchable amplification module is suitable for buoys with different power requirements and can be used for power switching in a matching manner;
the digital-analog compatible signal generating module can generate signals and transmit the signals through the antenna module.
2. The digital-to-analog compatible radio transceiver device for an airborne sonobuoy of claim 1, wherein:
the digital-analog compatible signal generator module adopts a software radio framework consisting of an FPGA chip and a DAC, codes and modulates the underwater detection signal at a baseband, directly converts the baseband signal into a radio frequency band after modulation, reads a working mode after the buoy is powered on, and switches the signal to an analog modulation mode or a digital modulation mode, so that the compatibility of the analog sonar buoy and the digital sonar buoy is realized.
3. The airborne sonar buoy digital-to-analog compatible radio transceiver device of claim 2, wherein the digital-to-analog compatible command receiving module includes a power supply, a crystal oscillator, a frequency synthesizer, an FPGA chip, a digital-to-analog converter DAC, a low noise amplifier LNA, and a filter for supplying power, wherein:
the FPGA chip controls the crystal oscillator to generate a basic clock signal, frequency modulation is carried out through the frequency synthesizer, signal conversion is carried out through a digital-to-analog converter (DAC), signal amplification is carried out through a Low Noise Amplifier (LNA), and the amplified electric signal is input to the filter to be filtered;
when the signal is transmitted, the signal generated by the buoy is input to the power switchable amplification module through the filter, and the power switchable amplification module performs matching power switching according to the type of the buoy.
4. The digital-to-analog compatible radio transceiver device of an airborne sonobuoy of claim 3, wherein:
the power switchable amplifying module is controlled by the digital-analog compatible signal generating module, and comprises a first-stage LDMOS tube and a first-stage LDMOS tube which form a common-emitter circuit, wherein:
after the power supply, the digital-analog compatible signal generating module reads the power transmission gear setting parameters, controls the magnitude of the drain working voltage of the first-stage LDMOS tube and the first-stage LDMOS tube through the TTL level control signal, realizes the switching of the high, medium and low three-gear transmission power, and realizes the compatibility of the power amplification of the analog buoy and the digital buoy.
5. The digital-to-analog compatible radio transceiver device of an airborne sonobuoy of claim 4, wherein:
the duplex matching module consists of a low-pass filter, a high-pass filter, a sound table filter and a matching circuit, wherein:
the processing circuit of the low-pass wave trap comprises a seven-order low-pass filter circuit, and the processing circuit is used for inhibiting the stray signals of the power switchable amplification module by 50dB so that the digital-analog compatible signal generation module works in a full-duplex mode; without performing a transmit/receive switching operation
The high-pass filter adopts a parallel resonant circuit, and the high-pass filter and the acoustic surface filter jointly isolate the transmitting signal by 70 dB;
the matching circuit is a five-order low-difference-loss low-pass filter circuit, wherein:
the duplex matching module performs impedance matching on the transmitting and receiving antenna and the power switchable amplification module, so that the standing-wave ratio of a transmitting full frequency band is lower than 2, and the signals of the power amplification module are ensured to pass through.
6. The digital-to-analog compatible radio transceiver device for an airborne sonobuoy of claim 1, wherein: the antenna is a receiving and transmitting integrated antenna and comprises a radiation oscillator and a ground array, wherein the length of the radiation array is lambda/4 of the central frequency, and the length of the ground array is lambda/16; the antenna module antenna is connected with the duplex matching module, and the transmitting end and the receiving end of the antenna share one antenna and adopt a frequency division multiplexing mode.
7. The digital-to-analog compatible radio transceiver device for an airborne sonobuoy of claim 1, wherein:
the digital-analog compatible instruction receiving module adopts a special single-chip integrated circuit to realize analog demodulation and digital demodulation, after the digital-analog compatible instruction receiving module is electrified, the digital-analog compatible instruction receiving module reads demodulation working parameters, and radio frequency signals are switched to the corresponding single-chip special integrated circuit through a radio frequency switch to realize analog demodulation or digital demodulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211250960.4A CN115833862A (en) | 2022-10-12 | 2022-10-12 | Digital-analog compatible radio transceiver for aviation sonar buoy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211250960.4A CN115833862A (en) | 2022-10-12 | 2022-10-12 | Digital-analog compatible radio transceiver for aviation sonar buoy |
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| CN115833862A true CN115833862A (en) | 2023-03-21 |
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| CN202211250960.4A Pending CN115833862A (en) | 2022-10-12 | 2022-10-12 | Digital-analog compatible radio transceiver for aviation sonar buoy |
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