Data processing method of external short-wave modem with multi-type remote control function

Abstract

The invention belongs to but is not limited to the technical field of short-wave communication, and discloses a short-wave external modem with a multi-type remote control function and a data processing method, remote control is performed through a covering wire, a network cable and a serial port line, and remote multi-mode remote control operation is realized; the digital signal processing unit comprises a signal amplification circuit, a filter circuit, a digital signal processing circuit, a power supply circuit and an IP network processing circuit, and is used for carrying out signal amplification processing and digital modulation processing on an input signal and then outputting the signal as a fixed audio signal; the panel unit comprises a main control circuit, a liquid crystal display circuit and an encryption circuit, and is used for realizing data encryption and parameter setting; and the rear interface unit comprises an audio conversion output circuit and various equipment interfaces, and realizes audio output, network access, covered wire access and power supply access. According to the data processing method, a digital signal processing platform is used, and an input audio or data signal is output to a short-wave radio station in a fixed audio mode after signal processing.

Description

Technical Field

[0001] The present invention belongs to but is not limited to the technical field of shortwave communication, and in particular relates to a data processing method for a shortwave external modem with multi-type remote control functions. Background Art

[0002] With the continuous development of shortwave communication technology, the shortwave equipment currently used in the market has a variety of signal modulation and demodulation processing methods. Under different modulation and demodulation methods, the data of various shortwave equipment cannot be interoperable, which brings inconvenience in system communication. Therefore, shortwave external modems have a lot of room for development in this prospect. They can achieve unified signal modulation and demodulation for different types of shortwave equipment, greatly enhance the construction of communication system networks, and realize the upgrading of shortwave equipment without replacing shortwave equipment. At the same time, the current equipment use environment requires multiple types of remote control, which is convenient for better operation of equipment when used.

[0003] The technical problems that need to be solved urgently in the prior art are:

[0004] 1. The current size of the shortwave external modem is too large to be portable and flexible. The size can be reduced, the current interface socket can be miniaturized, and the portability can be improved; the functional module can be miniaturized and the circuit can be simplified;

[0005] 2 The power supply method adopts DC power supply, supports vehicle-mounted power supply, and can add AC power supply to facilitate the installation and use of base stations; currently there is no independent power supply system, and power can only be provided externally. The battery use method can be added, and it does not rely on a single external power supply method;

[0006] 3. The rear panel unit has a radio port and a peripheral port, which can combine the two port definitions into one, enhancing the utilization rate of the equipment and saving the volume of the equipment;

[0007] 4. The network port, wiring, and serial port connection system software methods add wireless control methods, WIFI and Bluetooth, etc. Summary of the invention

[0008] In view of the problems existing in the prior art, the present invention provides a data processing method for a shortwave external modem with multi-type remote control functions. The external modulation of the signal is realized by the shortwave external signal modulation mode. The external connection of the modem can enable shortwave transceivers with different modulation modes to receive and transmit the same modulation signal, and the replacement of shortwave equipment can be completed under the premise of saving costs.

[0009] The present invention is implemented as follows: a shortwave external modem with multiple types of remote control functions is composed of a digital signal processing unit, a panel unit and a rear interface unit;

[0010] The signal processing unit includes a signal processing circuit, a power supply circuit and an IP network processing circuit, which is used to convert the input signal into an audio signal for output after signal modulation processing; the signal processing circuit includes a signal amplification circuit, a filter circuit, a single-chip microcomputer, an FPGA and a DSP circuit, etc.;

[0011] The panel unit includes a main control circuit, a liquid crystal display circuit and an encryption circuit, etc., and is used to realize functions such as data encryption and parameter setting;

[0012] The rear interface unit includes an audio conversion output circuit and various device interfaces, which are used to realize functions such as audio output, network access, wiring access, and power access.

[0013] Furthermore, the shortwave external modem has multiple types of remote control functions, and can be remotely controlled using an Ethernet port, a coverage cable, and a serial port; using data transmission software, it can be connected to the shortwave external modem through the Ethernet port, the coverage cable, and the serial port for remote control. The Ethernet port and the coverage cable realize data transmission through the IP network module, and the data is interacted with the main control unit to realize long-distance data transmission. The serial port communicates directly with the main control unit through the panel unit to realize multiple types of remote control functions.

[0014] Furthermore, when the shortwave external modem is in the modulation working state, the signal amplification circuit and the filtering circuit amplify and filter the audio signal input by the microphone, and send the audio signal to the digital signal processing circuit after signal processing. The FPGA generates a digital baseband signal and sends it to the DSP chip; the DSP chip is used to perform baseband modulation on the digital baseband signal to be sent, and send the digital audio signal generated by the baseband modulation to the FPGA; the FPGA sends the received digital audio signal to the audio D / A converter. When sending data, the shortwave external modem switches to the sending state, and the panel LCD screen will display that the current device is in the sending state; the D / A converter sends the audio signal to the audio amplification circuit, and then outputs it in the form of fixed audio through the rear panel.

[0015] Furthermore, when the shortwave external modem is in a demodulation working state, the fixed audio signal received from the shortwave receiver is first amplified, filtered, and processed before being sent to the digital signal processing circuit, and then sent to the FPGA after A / D conversion. The FPGA generates a digital baseband signal and sends it to the DSP chip. The DSP chip is used to perform baseband modulation on the digital baseband signal to be sent, and send the digital audio signal generated by the baseband modulation to the FPGA; the FPGA sends the received digital audio signal to the audio D / A converter for voice broadcasting; after receiving the data, the DSP interacts with the main control circuit of the panel unit, and the data is displayed on the LCD screen in the panel or connected to the data transmission software for data display in the software.

[0016] Furthermore, the power supply circuit steps down the DC 24V input to provide 5V, 3.3V, 1.8V, 1.5V, 1.2V voltages, etc. for the main control circuit, signal processing circuit, IP module, etc.

[0017] Furthermore, the IP network processing circuit sends the IP network protocol processing to the main control circuit in the panel unit for processing, thereby realizing IP network communication.

[0018] Furthermore, the main control circuit of the panel unit mainly has functions such as parameter setting and fixed phrase sending, and the LCD displays the corresponding settings, and can send data to the DSP for modulation and demodulation; the LCD display circuit includes liquid crystal and buttons, which can perform human-computer interaction operations; the encryption circuit encrypts the sent data; at the same time, the panel unit has a serial data port, which can be connected to the data transmission software through the serial port, and remote control operation can be performed through the software; it has an audio input port, which can perform voice input; it has a service knob, which can switch different service types for sending.

[0019] Furthermore, the rear interface unit mainly converts the single-ended audio output signal into a double-ended audio signal output, and has a network port socket, a wiring interface, a peripheral socket, a radio socket and a power input port, etc.

[0020] Another object of the present invention is to provide a data processing method for a shortwave external modem having multiple types of remote control functions, including voice processing and data processing;

[0021] (1) Voice processing: The analog audio is amplified by the amplifier circuit, digitized by A / D conversion, and then converted into an analog audio signal for output;

[0022] (2) Data processing: Data is transmitted to the main control circuit using digital transmission software, and then the audio signal is output after being processed by DSP.

[0023] Furthermore, when sending modulated data, you can connect the shortwave external modem through the data transmission software to edit and send text information, or you can send it through the fixed phrases stored in the shortwave external modem. The panel unit sends the data to the digital signal processing unit for modulation, and after the modulation is completed, it is sent to the rear panel unit to output it to the shortwave transmitter as an audio signal, thereby realizing the shortwave external modulation function; when sending voice, the first method is to directly input through the front panel audio port, adjust the service knob to the analog voice position or the voice code position for voice input, and the voice signal is sent to the DSP for digital signal modulation after signal amplification, filtering, A / D conversion and other processing; the second method is to input voice through the data transmission software, connect to the shortwave external modem through the network port, overlay cable, serial port and other methods for voice data transmission, and send the voice data to the DSP for voice signal modulation;

[0024] When receiving data, the demodulation method is that the rear panel unit peripheral interface receives the audio signal sent by the shortwave receiver, and after being processed by the audio amplification and filtering circuit, it is sent to the FPGA through A / D conversion, and then the data is demodulated by the DSP. The demodulated data is sent to the main control unit for display and reading. After the voice is demodulated, it is played by the audio port of the panel unit.

[0025] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0026] First, the purpose of the present invention is to propose a data processing method for a shortwave external modem with multi-type remote control functions, which uses multi-type remote control methods to control equipment, remotely operate equipment to achieve unattended operation, and save human resources; it can externally modulate and demodulate shortwave signals, and connect shortwave devices with different modulation methods to shortwave external modems so that they can output or receive the same type of modulation signals, so as to facilitate unified modulation and demodulation of shortwave devices with different modulation methods. The present invention processes the signal modulation part, sends it to the shortwave device in the form of fixed audio, and uses the signal transmission path of the shortwave device to transmit the radio frequency signal; when processing the signal demodulation part, the modem receives the fixed audio signal output by the shortwave device for demodulation. The present invention can improve the use efficiency of shortwave communication system equipment, and can update shortwave communication technology without replacing shortwave equipment, saving costs, and can maximize the use of shortwave equipment in the system. The present invention has a variety of business types, and the business type can be selected according to the use scenario, with analog voice, voice code, data, etc. suitable for different use scenarios.

[0027] The technical features of the present invention are: the present invention has multiple remote control methods to control the external modem, the usage scenarios are flexible, and the remote control methods of the external modem are diverse; the present invention has diverse usage scenarios, is adapted to multiple scenarios, equipment, etc., solves the problem that shortwave equipment in different systems are not interoperable, provides the same waveform for data transmission, and improves equipment utilization; the present invention has multiple service types, analog speech, voice code, and data are selectable, and multiple types enrich the usage scenarios.

[0028] Second, the technical solution of the present invention fills the technical gap in the industry at home and abroad: the variety of equipment currently used in the field of shortwave communication is rich, which also brings a variety of modulation signal waveforms, causing problems such as the inability of equipment data to communicate with each other during the use of the communication system. In view of the current development status of shortwave communication systems, there are many types of communication products and diversified modulation signals. The present invention can realize the unified modulation of baseband signals for different devices and different modulation waveforms. At the same time, it has multiple remote control methods for remote device remote control, which is convenient for actual use and operation.

[0029] Third, the technical solution of the present invention significantly improves the reliability and flexibility of the existing technology in industrial applications by designing a shortwave external modem with multi-type remote control functions, solves the shortcomings of traditional modems in remote control, data transmission stability, and data security, and achieves significant technical progress.

[0030] 1. Solved the problem of remote control limitation

[0031] Traditional modems usually only support a single control mode for remote control, which is easily limited by the network environment or signal coverage. The present invention introduces multiple control modes, including network port, overlay and serial port. This multi-interface design greatly enhances the adaptability of the device in different environments. Users can flexibly choose the control mode to ensure stable remote control in complex environments.

[0032] 2. Improved the stability of data transmission

[0033] The modem of the present invention integrates an IP network processing circuit in the signal processing unit, and effectively avoids signal interruption caused by a single transmission mode through the coordinated work of multiple transmission modes. Especially in remote operation, network port transmission and overlay transmission back up each other, which can ensure the continuity and stability of data, improve the data transmission reliability of the modem, and adapt to a wider range of application needs.

[0034] 3. Enhanced security of data transmission

[0035] Traditional shortwave modems have certain deficiencies in encryption protection of remote data transmission. The present invention implements data encryption function through encryption circuit in the panel unit, prevents data leakage and tampering during remote transmission, and ensures the security of transmitted information. This design has obvious advantages in industries with high security requirements, such as military communications, financial services, etc.

[0036] 4. Improved the flexibility and compatibility of equipment operation

[0037] Since the rear interface unit of the present invention supports multiple input and output interfaces and fixed audio transmission, the device can be compatible with the connection of multiple external devices and adapt to the use requirements of different scenarios. This design makes the device more flexible in application scenarios and also facilitates subsequent device upgrades or integration with other systems.

[0038] In summary, the technical solution of the present invention significantly solves the key problems of remote control, data stability, data security, etc. in the prior art, and has made significant progress in functionality and flexibility. Through these innovative designs, the modem of the present invention is more competitive in industrial applications, and brings efficient, stable and safe solutions to various industries that require shortwave communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the structure of a shortwave external modem with multiple types of remote control functions provided by an embodiment of the present invention;

[0040] Figure 2 is a schematic diagram of remote control provided by an embodiment of the present invention;

[0041] Figure 3 is a schematic diagram of a signal processing circuit provided by an embodiment of the present invention;

[0042] Figure 4 is a schematic diagram of a power supply circuit provided by an embodiment of the present invention;

[0043] Figure 5 is an audio modulation waveform provided by an embodiment of the present invention;

[0044] Figure 6 This is a liquid crystal interface display provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] like Figure 1 As shown, an embodiment of the present invention provides a shortwave external modem with multiple types of remote control functions, which is composed of a panel unit, a signal processing unit and a rear interface unit;

[0047] The signal processing unit includes a signal processing circuit, a power supply circuit and an IP network processing circuit, and is used to modulate or demodulate the input signal and then convert it into an audio signal for input or output;

[0048] The panel unit includes a main control circuit, a liquid crystal display circuit and an encryption circuit, etc., and is used to realize functions such as data encryption and parameter setting;

[0049] The rear interface unit includes audio conversion input and output circuits and various equipment interfaces, which are used to realize fixed audio input and output, network access, wiring access, power access and other functions.

[0050] like Figure 2As shown, the shortwave external modem has multiple types of remote control functions, and can be remotely controlled using an Ethernet port, a coverage cable, and a serial port; using the supporting system software, it can be connected to the shortwave external modem through the Ethernet port, a coverage cable, and a serial port for remote control. The Ethernet port realizes data transmission through an IP network module, and interacts the remote control data with the main control unit to realize long-distance data transmission. The serial port directly interacts with the main control unit through the panel unit to realize multiple types of remote control functions.

[0051] The shortwave external modem provided by the present invention is composed of a panel unit, a signal processing unit and a rear interface unit, and realizes the remote control function through a variety of interfaces. The input signal is modulated or demodulated by the signal processing unit and converted into an audio signal for output or input. The system is remotely controlled through a variety of connection methods such as an Internet port, a coverage line and a serial port, ensuring wide applicability and flexibility.

[0052] The signal processing unit includes a signal processing circuit, a power circuit, and an IP network processing circuit. The input signal is modulated or demodulated by the signal processing circuit and converted into a suitable audio signal for communication with other devices. The IP network processing circuit is responsible for the transmission of data in the network interface, ensuring the stable transmission of data at the network level. The power circuit supplies power to each circuit module to ensure the stable operation of the system.

[0053] The panel unit contains the main control circuit, LCD display circuit and encryption circuit. The main control circuit is responsible for the control function of the entire device, and the LCD display circuit is used to display the working status and parameters of the device, which is convenient for users to set and view the operation status. The encryption circuit provides protection for data encryption, ensuring that the data is not illegally tampered with or leaked during transmission, further improving the security of the device.

[0054] The rear interface unit includes audio conversion input and output circuits and multiple device interfaces, supporting fixed audio input and output, network access, overlay access, power access and other functions. Through the rear interface unit, the device can be connected to different external devices to achieve multifunctional data and audio exchange. The multifunctional interface design of this module makes the device more compatible and adaptable to more application scenarios.

[0055] The shortwave external modem supports remote control via Ethernet, wired and serial ports. Through the Ethernet port, the device is connected to the IP network module for data transmission and interaction with the main control unit to achieve long-distance data transmission. The wired and serial ports provide backup remote control methods, allowing shortwave modem control operations to be achieved even when the network is unstable. This multi-type remote control design ensures stable operation of the device in various environments.

[0056] The supporting system software is connected to the shortwave modem through the network, coverage line and serial port to facilitate remote control and parameter adjustment. The system software can send instructions through the network and interact with the main control unit to achieve real-time data transmission and feedback. The multiple connection methods supported by the software allow users to flexibly choose the appropriate control method, improving the operating experience and remote management capabilities of the equipment.

[0057] like Figure 3 As shown, the signal processing circuit mainly includes filtering, amplifying circuits, FPGA and DSP chips, ADC, etc. The filtering and amplifying circuit filters and amplifies the input audio signal, and then the processed audio enters the FPGA to generate a digital baseband signal and sends it to the DSP chip. The DSP chip is used to perform baseband modulation on the digital baseband signal and send the digital audio signal generated by the baseband modulation to the FPGA. The FPGA sends the received digital audio signal to the audio digital-to-analog converter, and the digital-to-analog converter sends the audio signal to the audio amplifying circuit, and finally converts the single-ended audio into a dual-ended audio for output.

[0058] like Figure 4 As shown, the power supply input DC voltage is 24V, and after LDO step-down processing, it provides 5V, 3.3V, 1.8V, 1.5V, 1.2V, etc. for the main control circuit, signal processing circuit, IP module, etc. The panel unit can perform human-computer interaction and data interaction with system software, FPGA and DSP chips. The panel can perform parameter setting operations, set the call address, local address, IP address, panel parameters, etc. of the shortwave external modem, and can also connect to the system software to set the parameters issued, and send the required modulated data to the FPGA and DSP chips.

[0059] In the embodiment of the present invention, the shortwave external modem is first connected to the shortwave device, and after the various parameters are successfully set, the required service is then selected for transmission, and the data is sent to the audio port of the shortwave device in the form of fixed audio, and the shortwave signal is externally modulated and then sent using the shortwave device transmission channel. The shortwave external modem receives the audio signal received by the shortwave device during demodulation, processes the audio signal, and the data content is displayed through the panel, and the received voice is played.

[0060] In the embodiment of the present invention, the shortwave external modem is used in conjunction with the system software to control the shortwave device to complete the modulation and demodulation of the shortwave external signal. The system software is connected to the shortwave external modem via a network cable, etc., and sends the required parameters to the shortwave external modem. It can set the various parameters of the shortwave device and control the shortwave device to send voice and data at the same time. It can also receive the audio data of the shortwave device, realize the reception or sending of external modulation and demodulation signals by the shortwave device, make full use of the shortwave device's signal receiving and sending path, and realize the upgrading of the equipment without replacing the equipment.

[0061] Example 1

[0062] The shortwave external modem uses a digital signal processing platform to process the input audio and data and output them to the shortwave equipment in the form of fixed audio.

[0063] The working mode mainly includes the parameter setting of the shortwave equipment, including system parameters such as equipment frequency, channel number, power level, tuning status, etc., and the use of shortwave external signal modulation and demodulation technology, with an interface for connecting the audio output of an external shortwave transceiver, transmitting or receiving fixed audio signals. For shortwave communication equipment with different modulation modes, the external modem can enable shortwave transceivers with different modulation modes to receive and transmit the same modulation signal, which can maximize the use of shortwave equipment and facilitate the construction of a unified shortwave communication system. First, connect the DC power supply through the power port. This power input method is convenient for vehicle-mounted equipment and is convenient for users to use it in a vehicle environment; connect the device port to the audio connection port of the shortwave device, and output the signal modulated by the shortwave external modem to the shortwave device to realize external signal modulation; set the shortwave external modem device parameters, and enter the menu to set parameters such as the call address, local address, IP address, and confidentiality machine. After the setting is completed, select the service type to be transmitted on the panel unit. There are four service types to choose from, including analog speech, voice code, voice signal and data. After selecting the service type to be transmitted, data output is performed; in the analog speech position, voice input can be performed directly, and the signal processing unit only performs signal amplification and filtering processing without modulation processing, and sends it to the audio port of the shortwave device. After the shortwave device receives the audio, it transmits; when selecting the voice code service, first input the voice through the audio port of the front panel unit, and the audio signal is filtered, amplified, and then modulated by the FPGA and DSP chips. After the modulation is completed, it is converted by digital to analog, and the audio data is sent to the shortwave device for data transmission; when selecting the data service, you can select the commonly used fixed phrases that have been stored in the menu for transmission. The main control circuit will generate a data signal and send it to the signal processing unit. After the FPGA and DSP modulation processing, the data is output to the rear panel unit for processing after digital to analog conversion, and then the single-ended audio is converted into a double-ended audio and output to the device port. After the shortwave device receives the data information, it transmits.

[0064] The information processing method mainly includes: first, the data information is generated by the main control and sent to the signal processing unit, and then the FPGA and DSP modulate the signal to form a shortwave modulation signal. The modulated signal is output in the form of audio data after analog-to-digital conversion, and then sent to the rear panel unit. The rear panel unit converts the audio signal into a double-end audio and outputs the double-end audio to the shortwave device port. The shortwave device transmits after receiving the data.

[0065] Example 2

[0066] When used in conjunction with system software, the shortwave external modem can exert greater functions.

[0067] When used in conjunction with the system software, it can be connected to the shortwave external modem through the remote control interface to achieve remote operation. The shortwave external modem can be operated unattended, which greatly saves manpower and is convenient to use. The system software can query and set the configuration parameters of the shortwave external modem and the parameters of the shortwave device. The shortwave radio parameters include channel number, frequency, power level, transceiver status, etc. The parameter setting port of the shortwave device is connected through the shortwave external modem external port, and the parameters of the shortwave device can be set through this port; text information can be manually input when sending data, and the modulation method is consistent with that when working with fixed phrases. When sending voice data, voice input can be performed through the system software, and the audio signal is sent to the IP module through the IP network for protocol conversion, filtering, amplification, etc. After processing, it is sent to the signal processing unit for modulation. The information processing method is consistent with when using a shortwave external modem to send voice data. When the system software is used at the same time, a single user can remotely control multiple shortwave external modems, and multiple devices can be operated simultaneously using one terminal; multiple users can remotely control a single shortwave external modem, and a single device can be operated using multiple terminals; multiple users can remotely control multiple shortwave external modems, and multiple devices can be operated simultaneously using multiple terminals; multiple operation modes meet the user's flexible application needs in different scenarios.

[0068] When the present invention is connected to a shortwave device, the existing transmission channel can be used to send external modulated data and output a fixed audio signal to the shortwave device. Due to the various types of external devices connected, the received audio amplitude indicators vary greatly, and the requirements for the received audio amplitude are not the same. According to the use of the device, the present invention has the function of adjusting the output fixed audio amplitude, which can be used for devices with different output powers to transmit with full-power signals, so that the device can maximize its effectiveness. The output audio amplitude is shown in FIG. Figure 5 Similarly, the amplitude of the audio received during the demodulation process can also be adjusted to ensure that the data can be demodulated correctly. After the parameters are set in the present invention, the LCD displays the current detailed status of the device. Figure 6 As shown, it displays the local address, calling address, status display and other contents.

[0069] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A shortwave external modem with multiple types of remote control functions, characterized in that: It consists of a digital signal processing unit, a panel unit and a rear interface unit; The signal processing unit includes a signal processing circuit, a power supply circuit and an IP network processing circuit, and is used to convert the input signal into an audio signal for output after signal modulation processing; the signal processing circuit includes a signal amplification circuit, a filter circuit, a single chip microcomputer, an FPGA and a DSP circuit; The panel unit includes a main control circuit, a liquid crystal display circuit and an encryption circuit, which are used for data encryption and parameter setting; The rear interface unit includes an audio conversion output circuit and various device interfaces for audio output, network access, wiring access, and power access.

2. The shortwave external modem with multi-type remote control function as claimed in claim 1, characterized in that: The shortwave external modem has multiple types of remote control functions. Data transmission software is used to connect to the shortwave external modem through the network port, coverage line and serial port for remote control. The network port and coverage line realize data transmission through the IP network module, and the data is interacted with the main control unit to realize long-distance data transmission. The serial port communicates directly with the main control unit through the panel unit to realize multiple types of remote control functions.

3. The shortwave external modem with multi-type remote control function as claimed in claim 1, characterized in that: When the shortwave external modem is in the modulation working state, the signal amplification circuit and the filtering circuit amplify and filter the audio signal input by the microphone, and send the audio signal to the digital signal processing circuit after signal processing. The FPGA generates a digital baseband signal and sends it to the DSP chip; the DSP chip is used to perform baseband modulation on the digital baseband signal to be sent, and send the digital audio signal generated by the baseband modulation to the FPGA; the FPGA sends the received digital audio signal to the audio D / A converter. When sending data, the shortwave external modem switches to the sending state, and the panel LCD screen will display that the current device is in the sending state; the D / A converter sends the audio signal to the audio amplification circuit, and then outputs it in the form of fixed audio through the rear panel.

4. The shortwave external modem with multi-type remote control function as claimed in claim 1, characterized in that: When the shortwave external modem is in a demodulation working state, the fixed audio signal received from the shortwave receiver is first amplified, filtered and processed, and then sent to the digital signal processing circuit, and then sent to the FPGA after A / D conversion. The FPGA generates a digital baseband signal and sends it to the DSP chip. The DSP chip is used to perform baseband modulation on the digital baseband signal to be sent, and send the digital audio signal generated by the baseband modulation to the FPGA; the FPGA sends the received digital audio signal to the audio D / A converter for voice broadcasting; after receiving the data, the DSP interacts with the main control circuit of the panel unit, and the data is displayed on the LCD screen in the panel or connected to the data transmission software for data display in the software.

5. The shortwave external modem with multi-type remote control function as claimed in claim 1, characterized in that: The power supply circuit steps down the DC 24V input to provide 5V, 3.3V, 1.8V, 1.5V, and 1.2V voltages for the main control circuit, signal processing circuit, and IP module respectively.

6. The shortwave external modem with multiple types of remote control functions as claimed in claim 1, characterized in that: The IP network processing circuit sends the IP network protocol processing to the main control circuit in the panel unit for processing to realize IP network communication.

7. The shortwave external modem with multi-type remote control function as claimed in claim 1, characterized in that: The main control circuit of the panel unit has parameter setting and fixed phrase sending functions, and the LCD displays corresponding settings, and sends data to the DSP for modulation and demodulation; the LCD display circuit includes liquid crystal and buttons for human-computer interaction; the encryption circuit encrypts the sent data; the panel unit has a serial data port, which is connected to the data transmission software through the serial port, and remote control operation is performed through the software; it has an audio input port for voice input; and it has a service knob that can switch different service types for sending.

8. The shortwave external modem with multiple types of remote control functions as claimed in claim 1, characterized in that: The rear interface unit converts the single-ended audio output signal into a double-ended audio signal output, and is provided with a network port socket, a wiring interface, a peripheral socket, a radio socket and a power input port.

9. A data processing method for a shortwave external modem with multi-type remote control functions as claimed in any one of claims 1 to 8, characterized in that: Including voice processing and data processing; (1) Voice processing: The analog audio is amplified by the amplifier circuit, digitized by A / D conversion, and then converted into an analog audio signal for output; (2) Data processing: Data is transmitted to the main control circuit using digital transmission software, and then the audio signal is output after being processed by DSP.

10. The data processing method of the shortwave external modem with multi-type remote control function as claimed in claim 9, characterized in that: When sending modulated data, the shortwave external modem is connected through the data transmission software to edit and send text information, or the fixed phrases stored in the shortwave external modem are used for sending. The panel unit sends the data to the digital signal processing unit for modulation. After the modulation is completed, it is sent to the rear panel unit and output to the shortwave transmitter as an audio signal, thus realizing the shortwave external modulation function. When sending voice, the first method is to input directly through the front panel audio port, adjust the service knob to the analog position or the voice code position for voice input, and the voice signal is sent to the DSP for digital signal modulation after signal amplification, filtering, and A / D conversion processing; the second method is to input voice through the digital transmission software, connect to the shortwave external modem through the network port, overlay cable, and serial port for voice data transmission, and send the voice data to the DSP for voice signal modulation; When receiving data, the demodulation method is that the rear panel unit peripheral interface receives the audio signal sent by the shortwave receiver, which is processed by the audio amplification and filtering circuits and sent to the FPGA through A / D conversion. The data is then demodulated by the DSP, and the demodulated data is sent to the main control unit for display and reading. After the voice is demodulated, it is played by the audio port of the panel unit.

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