A shortwave single sideband fast link establishment device

Abstract

The present invention relates to the technical field of shortwave communication, and in particular to a shortwave single sideband fast link establishment device. The present invention can use different channel modules to process a service module and an automatic link establishment module respectively in an asynchronous mode under automatic link establishment; quickly and effectively select a passable frequency in a given shortwave frequency band or a shortwave full frequency band; when there is no link establishment request, the link establishment module is always in a scanning state and does not interfere with the service module; and spectrum sensing is performed on the scanned channels so that the interfering channels can be quickly eliminated during detection.

Description

Technical Field

[0001] The invention relates to the technical field of shortwave communication, and in particular to a shortwave single sideband fast link establishment device. Background Art

[0002] In shortwave communication, automatic link establishment refers to automatically selecting an operating frequency in the shortwave wireless communication module to establish a link.

[0003] The existing shortwave communication radio stations use the same channel processing module for automatic link establishment and business communication. When a shortwave communication radio station has completed link establishment, its channel processing module will be occupied by business communication. At this time, if a third-party radio station establishes a link with the radio station, the third-party radio station will not receive any response; and the called radio station does not know that a third-party radio station has initiated a link establishment for it, resulting in business losses. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention aims at providing a shortwave single sideband fast link establishment device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions to achieve it.

[0006] A shortwave single sideband fast link establishment device, comprising a radio frequency channel processing unit, a multi-channel signal synchronization capture unit, a link establishment control unit, an upper layer control unit and a program storage unit;

[0007] The RF channel processing unit is unidirectionally connected to the multi-channel signal synchronization capture unit through a first communication interface, is bidirectionally connected to the multi-channel signal synchronization capture unit through a second communication interface, and is bidirectionally connected to the upper-layer control unit through a third communication interface; the multi-channel signal synchronization capture unit is bidirectionally connected to the link establishment control unit through a second communication interface; the link establishment control unit is bidirectionally connected to the program storage unit through a second communication interface, and is bidirectionally connected to the upper-layer control unit through a fourth communication interface;

[0008] The RF channel processing unit is used to down-convert the input RF digital signal, and convert the processed RF digital signal into multiple complex baseband signals of the same bandwidth, and transmit them to the multi-channel signal synchronization capture unit; the RF channel processing unit is also used to up-convert the data to be sent transmitted by the upper control unit and output it; the RF channel processing unit is also used to process and output the delinking signal transmitted by the multi-channel signal synchronization capture unit.

[0009] The multi-channel signal synchronous capture unit is used to group multiple-channel complex baseband signals, and simultaneously quickly and synchronously capture the multiple-channel complex baseband signals, and then transmit a complex baseband signal with a capture peak exceeding a capture threshold and a maximum capture peak and its channel number to the link establishment control unit; the multi-channel signal synchronous capture unit is also used to transmit a link removal signal to the RF channel processing unit.

[0010] The link establishment control unit is used to further perform synchronous capture on the baseband signal to complete the link establishment, and to send a link removal signal to the multi-channel signal synchronous capture unit.

[0011] The upper control unit is used to control the link establishment control unit to complete link establishment and link removal according to external instructions, and to read the status of the link establishment control unit and the data it receives; it is also used to set the transmission parameters of the radio frequency channel processing unit, and transmit the data to be sent to the radio frequency channel processing unit.

[0012] The program storage unit is used to store the program code of the link establishment control unit.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: in the asynchronous mode under automatic link establishment, different channel modules are used to process the service module and the automatic link establishment module respectively; a passable frequency is quickly and effectively selected in a given shortwave frequency band or a shortwave full frequency band; when there is no link establishment request, the link establishment module is always in a scanning state and does not interfere with the service module; at the same time, spectrum sensing is performed on the scanned channels so that the interfering channels can be quickly eliminated during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 It is a schematic diagram of the structure of the shortwave single sideband fast link establishment device of the present invention. DETAILED DESCRIPTION

[0016] The embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.

[0017] refer to Figure 1 , a shortwave single sideband fast link establishment device, comprising a radio frequency channel processing unit, a multi-channel signal synchronization capture unit, a link establishment control unit, an upper layer control unit and a program storage unit;

[0018] The RF channel processing unit is unidirectionally connected to the multi-channel signal synchronization capture unit through a first communication interface, is bidirectionally connected to the multi-channel signal synchronization capture unit through a second communication interface, and is bidirectionally connected to the upper-layer control unit through a third communication interface; the multi-channel signal synchronization capture unit is bidirectionally connected to the link establishment control unit through a second communication interface; the link establishment control unit is bidirectionally connected to the program storage unit through a second communication interface, and is bidirectionally connected to the upper-layer control unit through a fourth communication interface;

[0019] The RF channel processing unit is used to down-convert the input RF digital signal, and convert the processed RF digital signal into multiple complex baseband signals of the same bandwidth, and transmit them to the multi-channel signal synchronization capture unit; the RF channel processing unit is also used to up-convert the data to be sent transmitted by the upper control unit and output it; the RF channel processing unit is also used to process and output the delinking signal transmitted by the multi-channel signal synchronization capture unit.

[0020] The multi-channel signal synchronous capture unit is used to group multiple-channel complex baseband signals, and simultaneously quickly and synchronously capture the multiple-channel complex baseband signals, and then transmit a complex baseband signal with a capture peak exceeding a capture threshold and a maximum capture peak and its channel number to the link establishment control unit; the multi-channel signal synchronous capture unit is also used to transmit a link removal signal to the RF channel processing unit.

[0021] The link establishment control unit is used to further perform synchronous capture on the baseband signal to complete the link establishment, and to send a link removal signal to the multi-channel signal synchronous capture unit.

[0022] The upper control unit is used to control the link establishment control unit to complete link establishment and link removal according to external instructions, and to read the status of the link establishment control unit and the data it receives; it is also used to set the transmission parameters of the radio frequency channel processing unit, and transmit the data to be sent to the radio frequency channel processing unit.

[0023] The program storage unit is used to store the program code of the link establishment control unit.

[0024] Furthermore, the radio frequency channel processing unit is an FPGA chip.

[0025] Furthermore, the multi-channel signal synchronization capture unit is an FPGA chip.

[0026] Furthermore, the link building control unit is a DSP chip.

[0027] Furthermore, the upper control unit is an MCU chip.

[0028] Furthermore, the first communication interface is a universal parallel port UPP (Universal Parallel Port); the second communication interface is a multichannel buffered serial port McBSP (Multichannel Buffered Serial Port); the third communication interface is a serial peripheral interface SPI (Serial Peripheral Interface); and the fourth communication interface is an asynchronous serial interface UART (Universal Asynchronous Receiver / Transmitter).

[0029] When in use, the RF channel processing unit is connected to the RF front end. After the radio successfully establishes a link, the multi-channel signal synchronization capture unit continues to receive the link establishment signal. When a third-party radio establishes a link, the radio can still receive the link establishment request through different channels, thereby avoiding business losses.

[0030] The multi-channel signal synchronization capture unit is always in scanning state and does not interfere with the business module. The scanning frequency range is 2MHz to 30MHz. The channel bandwidth is in steps of 3KHz, and the number of available channels is:

[0031]

[0032] In order to improve the scanning efficiency, the module divides 320 channels into one group, which can be divided into 29 groups in total. In the scanning state, the scanning dwell time of each group is 120ms.

[0033] In the asynchronous mode under automatic link establishment, the radio uses different channel modules to process the business module and the automatic link establishment module respectively;

[0034] Through the multi-channel signal synchronization capture unit and link building control unit, the passable frequency can be quickly and effectively selected in a given shortwave frequency band or the full shortwave frequency band;

[0035] The link building control unit performs spectrum sensing on the scanned channels so that the channels with interference can be quickly eliminated during detection.

[0036] Although the present invention has been described in detail in general terms and in specific embodiments in this specification, it is obvious to those skilled in the art that some modifications or improvements may be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A shortwave single sideband fast link establishment device, characterized in that: It includes a radio frequency channel processing unit, a multi-channel signal synchronization capture unit, a link building control unit, an upper layer control unit and a program storage unit; The RF channel processing unit is unidirectionally connected to the multi-channel signal synchronization capture unit through a first communication interface, is bidirectionally connected to the multi-channel signal synchronization capture unit through a second communication interface, and is bidirectionally connected to the upper-layer control unit through a third communication interface; the multi-channel signal synchronization capture unit is bidirectionally connected to the link establishment control unit through a second communication interface; the link establishment control unit is bidirectionally connected to the program storage unit through a second communication interface, and is bidirectionally connected to the upper-layer control unit through a fourth communication interface; The RF channel processing unit is used to perform down-conversion processing on the input RF digital signal, and convert the processed RF digital signal into multiple complex baseband signals of the same bandwidth, and transmit them to the multi-channel signal synchronization capture unit; the RF channel processing unit is also used to perform up-conversion processing on the data to be sent transmitted by the upper control unit and output it; the RF channel processing unit is also used to process and output the delinking signal transmitted by the multi-channel signal synchronization capture unit; The multi-channel signal synchronous capture unit is used to group the multi-channel complex baseband signals, and simultaneously perform rapid synchronous capture on the multi-channel complex baseband signals, and then transmit the complex baseband signal with a capture peak value exceeding the capture threshold and the largest capture peak value and its channel number to the link establishment control unit; the multi-channel signal synchronous capture unit is also used to transmit the link removal signal to the RF channel processing unit; The link building control unit is used to further perform synchronous capture on the baseband signal to complete link building, and send a link removal signal to the multi-channel signal synchronous capture unit; The upper layer control unit is used to control the link building control unit to complete link building and link removal according to external instructions, and read the state of the link building control unit and the data received by it; it is also used to set the transmission parameters of the radio frequency channel processing unit, and transmit the data to be sent to the radio frequency channel processing unit; The program storage unit is used to store the program code of the link establishment control unit.

2. The shortwave single sideband fast link establishment device according to claim 1, characterized in that: The radio frequency channel processing unit is a FPGA chip.

3. The shortwave single sideband fast link establishment device according to claim 1, characterized in that: The multi-channel signal synchronization capture unit is an FPGA chip.

4. The shortwave single sideband fast link establishment device according to claim 1, characterized in that: The link building control unit is a DSP chip.

5. The shortwave single sideband fast link establishment device according to claim 1, characterized in that: The upper control unit is an MCU chip.

6. The shortwave single sideband fast link establishment device according to claim 1, characterized in that: The first communication interface is a universal parallel port UPP; the second communication interface is a multi-channel buffered serial port McBSP; the third communication interface is a serial peripheral interface SPI; and the fourth communication interface is an asynchronous serial interface UART.

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