Beidou satellite short message external antenna, terminal and control method thereof

Abstract

The invention relates to the technical field of Beidou application, in particular to a Beidou satellite short message external antenna and terminal and a control method thereof, comprising a sending module, a receiving module, a signal conversion module, a wireless Bluetooth communication module and a built-in power supply module; the signal conversion module is used for processing outbound signals received by the receiving module and inbound signals received by the wireless Bluetooth communication module; the wireless Bluetooth communication module is used for transmitting data between the Beidou satellite short message external antenna and the Beidou satellite short message terminal; and the built-in power supply module is used for supplying power to the Beidou satellite short message external antenna. Compared with a built-in antenna, the external antenna provided by the invention has better signal receiving and transmitting capability, can more effectively capture weak signals from a Beidou satellite, and improves the reliability and stability of communication. Through the wireless Bluetooth communication module, the external antenna can be in wireless connection with the Beidou satellite short message terminal, the structure is simple, cable constraint is reduced, installation and use are more flexible and convenient, and the manufacturing cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of Beidou application technology, and in particular to a Beidou satellite short message external antenna and terminal and a control method thereof. Background Art

[0002] BeiDou-2 Satellite Navigation System (BD2, Beidou-2) is a global satellite navigation system independently developed by China. As of the end of 2012, there are 14 satellites serving the Asia-Pacific region, including 5 GEO satellites, 5 IGSO satellites and 4 MEO satellites. Among them, 5 GEO satellites of BeiDou-2 provide short message communication functions, and other satellites provide navigation and positioning functions. 5 GEO satellites, each of which contains 2 independent beam signals, that is, a total of 10 independent beam signals provide short message communication services.

[0003] The BeiDou-3 project was officially launched in 2009. The space segment of the BeiDou-3 satellite navigation system consists of 27 medium earth orbit satellites, 5 synchronous orbit satellites, and 3 inclined synchronous orbit satellites, which will provide services to the world. BeiDou-3 officially provided services to the world on July 31, 2020. BeiDou-3 mainly provides basic navigation services, short message communication services (regional and global), satellite-based augmentation services, international search and rescue services, and precise point positioning services. The short message service capability of BeiDou-3 is 10 times larger in capacity than BeiDou-2, and the transmission power is 10 times smaller than BeiDou-2, which makes BeiDou short messages have stronger communication service capabilities.

[0004] The types of terminals based on Beidou satellite short message applications include handheld, vehicle-mounted, ship-mounted, data transmission, and command types. Handheld Beidou satellite short message terminals are the most widely used and largest type of terminals. Beidou satellite short message application terminals are integrated with internal antennas and have external antenna interfaces reserved to adapt to a wider range of application scenarios. At present, most Beidou satellite short message external antennas are connected to Beidou satellite short message application terminals through a wired connection, which is costly and has complex circuits. Summary of the invention

[0005] (I) Purpose of the invention

[0006] The object of the present invention is to provide a Beidou satellite short message external antenna and terminal with a simple structure and a control method thereof which can reduce manufacturing cost.

[0007] (II) Technical solution

[0008] In order to solve the above problems, the present invention provides a Beidou satellite short message external antenna, comprising: a sending module, a receiving module, a signal conversion module, a wireless Bluetooth communication module and a built-in power supply module;

[0009] The sending module, the receiving module, the signal conversion module, the wireless Bluetooth communication module and the built-in power supply module are electrically connected;

[0010] The receiving module is used to receive the outbound signal from the Beidou satellite and transmit it to the signal conversion module;

[0011] The sending module is used to send the inbound signal transmitted by the signal conversion module to the Beidou satellite;

[0012] The signal conversion module is used to process the outbound signal received by the receiving module and the inbound signal received by the wireless Bluetooth communication module;

[0013] The wireless Bluetooth communication module is used to transmit data between the Beidou satellite short message external antenna and the Beidou satellite short message terminal;

[0014] The built-in power module is used to supply power to the Beidou satellite short message external antenna.

[0015] In another aspect of the present invention, preferably, the transmitting module comprises an L-frequency passive antenna and an L-frequency power amplifier circuit;

[0016] The L-frequency passive antenna is used to send inbound signals to Beidou satellites;

[0017] The L-frequency power amplifier circuit is used to amplify the inbound signal.

[0018] In another aspect of the present invention, preferably,

[0019] The receiving module includes an S-frequency passive antenna and an S-frequency low-noise amplifier circuit;

[0020] The S-frequency passive antenna is used to receive the outbound signal of the Beidou satellite;

[0021] The S-frequency low-noise amplifier circuit is used to perform low-noise active amplification on the outbound signal of the Beidou satellite.

[0022] In another aspect of the present invention, preferably,

[0023] The signal conversion module includes a frequency conversion circuit and a baseband circuit;

[0024] The wireless Bluetooth communication module, baseband circuit and frequency conversion circuit are communicatively connected;

[0025] The frequency conversion circuit is respectively connected to the S-frequency low-noise amplifier circuit and the L-frequency power amplifier circuit for communication.

[0026] The frequency conversion circuit is used to perform frequency conversion processing on the outbound signal after amplification and the inbound signal transmitted by the baseband circuit respectively;

[0027] The baseband circuit is used to process the outbound signal after frequency conversion processing and the inbound signal transmitted by the wireless Bluetooth communication module respectively.

[0028] In another aspect of the present invention, preferably,

[0029] The S-frequency passive antenna supports an elevation angle of 10° to 90° and an azimuth angle of 0° to 360°;

[0030] The L-frequency passive antenna supports an elevation angle of 10° to 90° and an azimuth angle of 0° to 360°.

[0031] In another aspect of the present invention, preferably,

[0032] The built-in power module includes an energy storage unit, a charging unit and a power selection unit;

[0033] The energy storage unit stores electricity to power the Beidou satellite short message external antenna;

[0034] The external power source is used to charge the energy storage unit through the charging unit;

[0035] During charging, the power selection circuit stops the energy storage unit from supplying power to the Beidou satellite short message external antenna; and the external power supply supplies power to the Beidou satellite short message external antenna.

[0036] When not charging, the power selection circuit selects the energy storage unit to power the Beidou satellite short message external antenna.

[0037] In another aspect of the present invention, preferably, a Beidou satellite short message terminal is provided, and the Beidou satellite short message terminal comprises the Beidou satellite short message external antenna as described above.

[0038] In another aspect of the present invention, preferably,

[0039] The Beidou satellite short message terminal also includes a control module and a SIM module;

[0040] The control module is communicatively connected with the SIM module;

[0041] The control module receives the outbound signal transmitted by the wireless Bluetooth communication module and transmits it to the SIM module, and receives the inbound signal transmitted by the SIM module and transmits it to the wireless Bluetooth communication module;

[0042] The SIM module receives and decodes the outbound signal transmitted by the control module, and compiles the information to be sent into an inbound signal and transmits it to the control module.

[0043] Another aspect of the present invention is preferably a control method for a Beidou satellite short message terminal, characterized in that the control method is applicable to the Beidou satellite short message terminal as described above;

[0044] The control method includes a Beidou short message receiving method;

[0045] The receiving method comprises:

[0046] The receiving module receives the outbound signal from the Beidou satellite and transmits it to the signal conversion module;

[0047] The signal conversion module processes the outbound signal received by the receiving module and transmits it to the control module through the wireless Bluetooth communication module;

[0048] The control module transmits the received outbound signal to the SIM module;

[0049] The SIM module decodes the outbound signal.

[0050] In another aspect of the present invention, preferably, the control method further includes a Beidou short message sending method;

[0051] The sending method comprises:

[0052] The SIM module compiles the information to be sent and obtains an inbound signal;

[0053] The control module transmits the inbound signal to the signal conversion module via the wireless Bluetooth communication module;

[0054] The signal conversion module processes the inbound signal and sends it to the Beidou satellite through the sending module.

[0055] (III) Beneficial effects

[0056] The above technical solution of the present invention has the following beneficial technical effects:

[0057] Compared with the built-in antenna, the external antenna of the present invention has better signal receiving and sending capabilities, can more effectively capture weak signals from Beidou satellites, and transmit the signals to internal circuits for processing after amplification. At the same time, it can also send signals back to Beidou satellites more stably, thereby improving the reliability and stability of communication. Through the wireless Bluetooth communication module, the external antenna can be wirelessly connected to the Beidou satellite short message terminal, with a simple structure, reducing the constraints of cables, making installation and use more flexible and convenient, and reducing manufacturing costs. The sending module, receiving module, signal conversion module, wireless Bluetooth communication module and built-in power module are integrated into one, and data transmission and control are realized through electrical connection between each module, ensuring the coordinated operation of the entire system. The built-in power module provides stable power support for the entire system, which can extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a schematic diagram of the overall structure of an external antenna according to an embodiment of the present invention;

[0059] Figure 2 It is a schematic diagram of the structure of a built-in power module according to an embodiment of the present invention;

[0060] Figure 3 It is a schematic diagram of the structure of a Beidou satellite short message terminal according to an embodiment of the present invention;

[0061] Figure 4 It is a schematic diagram of a SIM module and a baseband circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0063] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clarity. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0064] Obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0066] The present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0067] Embodiment 1

[0068] A Beidou satellite short message external antenna, Figure 1 FIG. 1 shows a schematic diagram of the overall structure of an embodiment of the present invention. Figure 1 As shown, it includes: a sending module, a receiving module, a signal conversion module, a wireless Bluetooth communication module and a built-in power module;

[0069] The sending module, the receiving module, the signal conversion module, the wireless Bluetooth communication module and the built-in power module are electrically connected;

[0070] The receiving module is used to receive the outbound signal from the Beidou satellite and transmit it to the signal conversion module; the specific content of the receiving module is not limited here. In this embodiment, the receiving module includes an S-frequency passive antenna and an S-frequency low-noise amplifier circuit; the S-frequency passive antenna is used to receive the outbound signal of the Beidou satellite; the S-frequency low-noise amplifier circuit is used to perform low-noise active amplification on the outbound signal of the Beidou satellite. The S-frequency low-noise amplifier circuit is used to perform low-noise amplification on the weak signal received by the S-frequency passive antenna. In this embodiment, the gain of the S-frequency low-noise amplifier circuit is about 32db.

[0071] Furthermore, the S-frequency passive antenna is used to receive the outbound signal of the Beidou satellite short message. The center frequency is 2491.75MHz. The S-frequency passive antenna supports an elevation angle of 10°~90° and an azimuth angle of 0°~360°. It adopts an omnidirectional antenna design, which allows users to quickly (less than 1 second) lock onto the Beidou satellite short message outbound signal, ensuring convenience and reliability when using it.

[0072] Furthermore, the S-frequency low-noise amplifier circuit is used to perform low-noise active amplification on the passive outbound signal at the S-frequency, and adopts a two-stage amplification design, and the low-noise amplifier gain is designed to be about 35dB.

[0073] The sending module is used to send the inbound signal transmitted by the signal conversion module to the Beidou satellite; the specific content of the sending module is not limited here. In this embodiment, the sending module includes an L-frequency passive antenna and an L-frequency power amplifier circuit; the L-frequency passive antenna is used to send the inbound signal to the Beidou satellite; the L-frequency power amplifier circuit is used to amplify the inbound signal; in this embodiment, the L-frequency power amplifier circuit adopts a 5-watt power amplifier design, which is used to amplify the incoming telegram information signal and then transmit it to the Beidou short message satellite.

[0074] Furthermore, the L-frequency passive antenna is used to transmit inbound signals to Beidou satellites. The Beidou-3 civil short message inbound frequency supports two inbound frequencies, Lf1 and Lf2, and the intermediate frequencies are 1614.26MHz and 1618.34MHz respectively. The L-frequency passive antenna supports an elevation angle of 10° to 90° and an azimuth angle of 0° to 360°. It adopts an omnidirectional antenna design to ensure the power of the inbound signal and the success rate of communication.

[0075] Furthermore, the power amplifier circuit design of the L frequency point adopts a 5-watt power amplifier circuit. The power amplifier circuit works in a burst mode. According to different message lengths, the power amplifier is turned on for approximately 100ms to 1000ms.

[0076] The signal conversion module is used to process the outbound signal received by the receiving module and the inbound signal received by the wireless Bluetooth communication module; in this embodiment, the signal conversion module includes a frequency conversion circuit and a baseband circuit; the wireless Bluetooth communication module, the baseband circuit and the frequency conversion circuit are communicatively connected; the frequency conversion circuit is communicatively connected with the S-frequency low-noise amplifier circuit and the L-frequency power amplifier circuit respectively, and the frequency conversion circuit is used to perform frequency conversion processing on the outbound signal after amplification processing and the inbound signal transmitted by the baseband circuit respectively; the baseband circuit is used to process the outbound signal after frequency conversion processing and the inbound signal transmitted by the wireless Bluetooth communication module respectively;

[0077] Among them, the frequency conversion circuit is set as an RDSS channel up and down conversion circuit, which is used to down-convert the RF signal of the S frequency point to an intermediate frequency signal for use by the AD of the Beidou short message baseband circuit; the RDSS channel up and down conversion circuit is used to BPSK modulate the inbound telegram output by the Beidou short message baseband circuit and up-convert it to the L-band inbound frequency; further, the RDSS channel up and down conversion circuit is used to down-convert the RF signal 2491MHz of the S frequency point to 12.24MHz, and the up conversion circuit is used to mix the 8.16M BPSK signal output by the baseband and modulate it to the L-band.

[0078] The Beidou short message baseband circuit is used to realize the capture, tracking, message analysis and modulation of the Beidou satellite short message outbound signal, and belongs to the digital circuit part; further, the Beidou short message baseband circuit has a built-in AD sampling, which is used to realize the capture, tracking, demodulation, message analysis and modulation of the Beidou short message outbound signal. The Beidou short message baseband circuit provides Beidou short message communication service functions through the serial port.

[0079] The wireless Bluetooth communication module is used to transmit data between the Beidou satellite short message external antenna and the Beidou satellite short message terminal; the wireless Bluetooth communication module is used to realize the data transmission between the Beidou satellite short message external antenna and the Beidou short message terminal about the Beidou SIM module related functions, so as to ensure the realization of the Beidou satellite short message external antenna function. The wireless Bluetooth communication module is connected to the control module of the Beidou satellite short message terminal through the TTL serial port, and is used for the subsequent external antenna data interaction work related to the Beidou user SIM module.

[0080] The wireless Bluetooth communication module mainly realizes two functions: one is to transmit the user's original encrypted short message received by the external antenna to the Beidou satellite short message terminal via Bluetooth; the other is to send the inbound message application sent by the Beidou satellite short message terminal, including the content of the message to be sent, the inbound authentication code, the user ID and the inbound frame number field information, to the external antenna via Bluetooth. Bluetooth communication adopts a two-way serial Bluetooth wireless communication mode, that is, a point-to-point Bluetooth serial port two-way sending and receiving mode, which is similar to the data processing method of ordinary RS232 serial communication.

[0081] The frequency hopping sequence of the wireless Bluetooth communication module in this embodiment is generated by the following steps:

[0082] Determine the initial frequency f0 and a frequency set F = {f1, f2, ..., f M}, where M is the size of the frequency set;

[0083] Generate an initial key K using a secure random number generator or pseudo-random number generator;

[0084] Use the key K to generate a series of extended keys K through the key scheduling algorithm i ;

[0085] A preset timestamp function T(t) generates a timestamp value according to the current time t;

[0086] T(t)=t mod P

[0087] Wherein, P is a predefined period value used to periodically reset the timestamp;

[0088] Use the timestamp T(t) to update the key according to the following formula:

[0089] K i+1 =SHA-256(K i ||T(t))

[0090] Among them, K i+1 represents a new key, || represents a string concatenation operation; SHA-256 is the SHA-256 algorithm, K i is the current key, which can be a bit string of any length; T(t) is the timestamp generated according to the current time t;

[0091] The next hopping frequency value is generated using the following formula:

[0092] f n+1 =(f n +H(K i+1 ,f n ,T(t)))mod M

[0093] Here, H is a hash function that accepts a key K. i+1 、Current frequency hopping value f n and timestamp T(t) as input, and output the next frequency hopping value f n+1 ;

[0094] Furthermore, using the key K based on the time function i+1 Encrypt the frequency hopping sequence:

[0095]

[0096] Where E is an encryption function that accepts a key K i+1 、Current frequency f n+1 and timestamp T(t) as input, and output the encrypted frequency hopping value f n ' +1 .

[0097] Figure 2 FIG. 4 shows a schematic diagram of the structure of a built-in power module according to an embodiment of the present invention. Figure 2 As shown, the built-in power module is used to power the Beidou satellite short message external antenna. The built-in power module is used to power the Beidou satellite short message external antenna so that it can work independently; the built-in power module includes an energy storage unit, a charging unit and a power selection unit; the energy storage unit stores electricity to power the Beidou satellite short message external antenna; the external power supply is used to charge the energy storage unit through the charging unit; when charging, the power selection circuit stops the energy storage unit from powering the Beidou satellite short message external antenna; the external power supply powers the Beidou satellite short message external antenna. When not charging, the power selection circuit selects the energy storage unit to power the Beidou satellite short message external antenna.

[0098] Compared with the built-in antenna, the external antenna of the present invention has better signal receiving and sending capabilities, can more effectively capture weak signals from Beidou satellites, and transmit the signals to internal circuits for processing after amplification. At the same time, it can also send signals back to Beidou satellites more stably, thereby improving the reliability and stability of communication. Through the wireless Bluetooth communication module, the external antenna can be wirelessly connected to the Beidou satellite short message terminal, with a simple structure, reducing the constraints of cables, making installation and use more flexible and convenient, and reducing manufacturing costs. The sending module, receiving module, signal conversion module, wireless Bluetooth communication module and built-in power module are integrated into one, and data transmission and control are realized through electrical connection between each module, ensuring the coordinated operation of the entire system. The built-in power module provides stable power support for the entire system, which can extend the service life of the equipment.

[0099] Embodiment 2

[0100] A Beidou satellite short message terminal, Figure 3 FIG. 1 shows a schematic diagram of the overall structure of an embodiment of the present invention. Figure 3 As shown, the Beidou satellite short message terminal includes the Beidou satellite short message external antenna as above.

[0101] Furthermore, the Beidou satellite short message terminal also includes a control module and a SIM module;

[0102] The control module is communicatively connected with the SIM module;

[0103] The control module receives the outbound signal transmitted by the wireless Bluetooth communication module and transmits it to the SIM module, and receives the inbound signal transmitted by the SIM module and transmits it to the wireless Bluetooth communication module;

[0104] The SIM module receives and decodes the outbound signal transmitted by the control module, and compiles the information to be sent into an inbound signal and transmits it to the control module.

[0105] The SIM module is built into the Beidou satellite short message terminal. The SIM module interacts and communicates with the control module in the Beidou satellite short message terminal through the IC card bus. The control module is a Beidou short message baseband chip. By upgrading and transforming the internal Beidou short message baseband program of the Beidou satellite short message terminal, the interaction between the SIM module and the external antenna of the Beidou short message terminal is opened up to realize the Beidou satellite short message external antenna function. Through Bluetooth wireless communication, the SIM module function of the Beidou short message terminal is used to realize the external antenna function of the Beidou short message terminal, which does not affect the existing structure of the Beidou short message terminal and has many advantages such as low cost and simple and convenient use.

[0106] Embodiment 3

[0107] A control method for a Beidou satellite short message terminal, the control method is applicable to the above Beidou satellite short message terminal;

[0108] The control method includes a Beidou short message receiving method;

[0109] Receiving methods include:

[0110] The receiving module receives the outbound signal from the Beidou satellite and transmits it to the signal conversion module;

[0111] The signal conversion module processes the outbound signal received by the receiving module and transmits it to the control module through the wireless Bluetooth communication module;

[0112] The control module transmits the received outbound signal to the SIM module;

[0113] The SIM module decodes the outbound signal.

[0114] The SIM module is connected to the Beidou short message baseband chip, i.e. the baseband circuit. Figure 4 : is a schematic diagram of a SIM module and a baseband circuit according to an embodiment of the present invention. Figure 4 As shown, the SIM module and the baseband circuit adopt the smart card interface communication mode, mainly realizing two-way communication with the Beidou baseband chip through two lines, the clock line and the data line. The input frequency of the clock line is required to be 4.896MHz~5MHz, and the duty cycle is between 45% and 55%.

[0115] The signal conversion module encodes the received telegram information as shown in Table 1, and sends it to the SIM module for decryption through the smart card bus communication.

[0116] Table 1 Original message format

[0117] Instruction Type Receiving ID User Index Message length Original message 23H 3 bytes 2 bytes 2 bytes Variable length

[0118] The Beidou user card returns the decrypted message as shown in Table 2.

[0119] Table 2 Format of decrypted message

[0120] Instruction Type Status Information Message length Declassified message 23H 1 byte 2 bytes Variable length

[0121] The control method also includes a Beidou short message sending method;

[0122] The sending methods include:

[0123] 1) The Beidou satellite short message terminal sends the length of the message to be sent, the user ID, the inbound frame number and other fields to the Beidou SIM card through the Beidou satellite short message baseband chip, and requests the Beidou satellite inbound authentication code sent this time;

[0124] SIM module is connected to the base circuit, see Figure 4 SIM card and Beidou short message baseband chip adopt smart card interface communication mode, mainly through the clock line and data line two lines and Beidou baseband chip to achieve two-way communication, where the input frequency of the clock line is required to be 4.896MHz~5MHz, and the duty cycle is between 45% and 55%. The Beidou baseband chip in the Beidou satellite short message terminal sends the information to be authenticated to the Beidou user card in the format shown in Table 3.

[0125] Table 3 Format of information to be authenticated

[0126]

[0127]

[0128] Inbound type: Regional short message inbound is 01H; global short message inbound is 02H; others are illegal.

[0129] The information to be authenticated, the regional short message inbound includes: ID number (24 bits), number length indication (14 bits), inbound sequence number (16 bits), response satellite number (6 bits), response beam number (4 bits), and response time (8 bits).

[0130] Information type, the default value is 00H.

[0131] After receiving the inbound identity authentication information, the Beidou user card returns the authentication code information to the baseband chip of the Beidou satellite short message terminal. The returned authentication code information is shown in Table 4;

[0132] Table 4 Authentication code information

[0133] Instruction Type Status Information Identity Authentication 25H 1 byte 3 bytes

[0134] Status information: 00H is normal, others are abnormal.

[0135] The SIM module sends the inbound authentication code to the Beidou satellite short message terminal;

[0136] The Beidou satellite short message terminal sends the information such as the message content to be sent, the inbound authentication code, the user ID, the inbound frame number, etc. to the external antenna through the wireless Bluetooth communication module;

[0137] The external antenna encodes and modulates the content of the message to be sent through the built-in baseband circuit and radio frequency circuit, and finally sends it to the Beidou satellite via the L-band signal.

[0138] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

[0139] In the above description, the technical details of patterning and etching of each layer are not described in detail. However, those skilled in the art should understand that various means in the prior art can be used to form layers, regions, etc. of desired shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not completely the same as the methods described above.

[0140] The present invention has been described above with reference to the embodiments of the present invention. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Without departing from the scope of the present invention, a person skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

[0141] Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.

[0142] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A Beidou satellite short message external antenna, characterized in that: include: Transmitting module, receiving module, signal conversion module, wireless Bluetooth communication module and built-in power module; The sending module, the receiving module, the signal conversion module, the wireless Bluetooth communication module and the built-in power supply module are electrically connected; The receiving module is used to receive the outbound signal from the Beidou satellite and transmit it to the signal conversion module; The sending module is used to send the inbound signal transmitted by the signal conversion module to the Beidou satellite; The signal conversion module is used to process the outbound signal received by the receiving module and the inbound signal received by the wireless Bluetooth communication module; The wireless Bluetooth communication module is used to transmit data between the Beidou satellite short message external antenna and the Beidou satellite short message terminal; The built-in power module is used to supply power to the Beidou satellite short message external antenna.

2. The Beidou satellite short message external antenna according to claim 1, characterized in that: The transmitting module includes an L-frequency passive antenna and an L-frequency power amplifier circuit; The L-frequency passive antenna is used to send inbound signals to Beidou satellites; The L-frequency power amplifier circuit is used to amplify the inbound signal.

3. The Beidou satellite short message external antenna according to claim 2, characterized in that: The receiving module includes an S-frequency passive antenna and an S-frequency low-noise amplifier circuit; The S-frequency passive antenna is used to receive the outbound signal of the Beidou satellite; The S-frequency low-noise amplifier circuit is used to perform low-noise active amplification on the outbound signal of the Beidou satellite.

4. The Beidou satellite short message external antenna according to claim 3, characterized in that: The signal conversion module includes a frequency conversion circuit and a baseband circuit; The wireless Bluetooth communication module, baseband circuit and frequency conversion circuit are communicatively connected; The frequency conversion circuit is respectively connected to the S-frequency low-noise amplifier circuit and the L-frequency power amplifier circuit for communication. The frequency conversion circuit is used to perform frequency conversion processing on the outbound signal after amplification and the inbound signal transmitted by the baseband circuit respectively; The baseband circuit is used to process the outbound signal after frequency conversion processing and the inbound signal transmitted by the wireless Bluetooth communication module respectively.

5. The Beidou satellite short message external antenna according to claim 4, characterized in that: The S-frequency passive antenna supports an elevation angle of 10° to 90° and an azimuth angle of 0° to 360°; The L-frequency passive antenna supports an elevation angle of 10° to 90° and an azimuth angle of 0° to 360°.

6. The Beidou satellite short message external antenna according to claim 1, characterized in that: The built-in power module includes an energy storage unit, a charging unit and a power selection unit; The energy storage unit stores electricity to power the Beidou satellite short message external antenna; The external power source is used to charge the energy storage unit through the charging unit; During charging, the power selection circuit stops the energy storage unit from supplying power to the Beidou satellite short message external antenna; an external power supply supplies power to the Beidou satellite short message external antenna; When not charging, the power selection circuit selects the energy storage unit to power the Beidou satellite short message external antenna.

7. A Beidou satellite short message terminal, characterized in that: The Beidou satellite short message terminal includes the Beidou satellite short message external antenna as described in any one of claims 1-6.

8. The Beidou satellite short message terminal according to claim 7, characterized in that: The Beidou satellite short message terminal also includes a control module and a SIM module; The control module is communicatively connected with the SIM module; The control module receives the outbound signal transmitted by the wireless Bluetooth communication module and transmits it to the SIM module, and receives the inbound signal transmitted by the SIM module and transmits it to the wireless Bluetooth communication module; The SIM module receives and decodes the outbound signal transmitted by the control module, and compiles the information to be sent into an inbound signal and transmits it to the control module.

9. A control method for a Beidou satellite short message terminal, characterized in that: The control method is applicable to the Beidou satellite short message terminal as claimed in claim 7 or 8; The control method includes a Beidou short message receiving method; The receiving method comprises: The receiving module receives the outbound signal from the Beidou satellite and transmits it to the signal conversion module; The signal conversion module processes the outbound signal received by the receiving module and transmits it to the control module through the wireless Bluetooth communication module; The control module transmits the received outbound signal to the SIM module; The SIM module decodes the outbound signal.

10. The control method according to claim 9, characterized in that: The control method also includes a Beidou short message sending method; The sending method comprises: The SIM module compiles the information to be sent and obtains an inbound signal; The control module transmits the inbound signal to the signal conversion module via the wireless Bluetooth communication module; The signal conversion module processes the inbound signal and sends it to the Beidou satellite through the sending module.

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