Beidou short message receiving and transmitting system

Abstract

The utility model relates to the technical field of Beidou short messages, in particular to a Beidou short message transceiving system. The Beidou short message transceiving system comprises an outdoor antenna, a first indoor antenna, a second indoor antenna and a signal processing unit, the signal processing unit comprises a power divider, a first amplifier, a second amplifier and a third amplifier, the input end of the power divider is connected with the outdoor antenna, the output end of the power divider is connected with the input ends of the first amplifier and the second amplifier, the output end of the first amplifier is connected with the first indoor antenna, and the output end of the second amplifier is connected with the second indoor antenna; the input end of the third amplifier is connected with the second indoor antenna, and the output end is connected with the outdoor antenna; according to the invention, the outdoor satellite signal can be introduced into an indoor area or other areas with weak satellite signals, the communication requirements of the indoor area or other areas with weak satellite signals can be met, and the indoor positioning can be realized.

Description

Technical Field

[0001] This utility model relates to the field of BeiDou short message technology, and in particular to a BeiDou short message transceiver system. Background Technology

[0002] Satellite positioning technology is a technique that uses artificial Earth satellites to measure point locations. Its basic principle is to utilize satellites to broadcast time signals. When a device receives the signal, it calculates the signal transmission time based on the signal transmission time and its local time, and then combines this with the speed of light to obtain the distance between the satellite and the device. The BeiDou Navigation Satellite System is one of China's independently developed and constructed global satellite navigation systems, featuring all-weather, all-time, and global coverage. It not only provides high-precision positioning, navigation, and timing services but also supports short message communication.

[0003] In many application scenarios, especially inside large buildings or underground locations, satellite signals may be blocked or attenuated, resulting in poor communication and making indoor positioning difficult. Utility Model Content

[0004] This utility model provides a Beidou short message transceiver system to solve the problem in the prior art where satellite signals may be blocked or attenuated, resulting in poor communication and difficulty in indoor positioning.

[0005] This utility model discloses a Beidou short message transceiver system, comprising: an outdoor antenna, a first indoor antenna, a second indoor antenna, and a signal processing unit; the signal processing unit includes a power divider, a first amplifier, a second amplifier, and a third amplifier. The input terminal of the power divider is connected to the outdoor antenna, and the output terminal of the power divider is connected to the input terminals of the first and second amplifiers. The output terminal of the first amplifier is connected to the first indoor antenna, the output terminal of the second amplifier is connected to the second indoor antenna, and the input terminal of the third amplifier is connected to the second indoor antenna, while the output terminal is connected to the outdoor antenna.

[0006] The outdoor antenna receives satellite signals and transmits them to the power divider. The power divider distributes the satellite signals into S-band and GNSS signals. The GNSS signal is transmitted to the first amplifier, which amplifies the GNSS signal and transmits it indoors via the first indoor antenna. The S-band signal is transmitted to the second amplifier, which amplifies the S-band signal and transmits it indoors via the second indoor antenna. The second indoor antenna receives L-band signals from indoors and transmits the L-band signals to the third amplifier, which amplifies the L-band signals and transmits them outdoors via the outdoor antenna.

[0007] Optionally, the BeiDou short message transceiver system further includes an attenuator and a main control chip. The main control chip is used to output a control signal to the attenuator. The attenuator is disposed between the first amplifier and the first indoor antenna. The attenuator is used to adjust the gain of the GNSS signal under the control signal and transmit the adjusted GNSS signal to the indoor environment through the first indoor antenna.

[0008] Optionally, the power divider includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor, and a resistor. The first terminals of the first capacitor, the first inductor, and the second inductor are connected to the outdoor antenna. The second terminal of the first capacitor is connected to the first terminals of the second and third capacitors. The second terminals of the first and second inductors are connected to the first terminal of the resistor and the first amplifier. The second terminals of the second inductor and the third capacitor are connected to the second terminal of the resistor and the second amplifier.

[0009] Optionally, the signal processing unit further includes a first filter disposed between the power divider and the second amplifier.

[0010] Optionally, the signal processing unit further includes a second filter, which is disposed between the second amplifier and the second indoor antenna.

[0011] Optionally, the signal processing unit further includes a third filter, which is disposed between the second indoor antenna and the third amplifier.

[0012] Optionally, the signal processing unit further includes a fourth filter disposed between the third amplifier and the outdoor antenna.

[0013] Optionally, the signal processing unit further includes a communication interface connected to the main control chip, the communication interface being used to receive signal gain commands from external terminal devices.

[0014] Optionally, the main control chip is connected to a button, and the main control chip outputs the control signal under the button's press signal.

[0015] Optionally, the main control chip is also connected to a display screen, which is used to display the signal gain of the GNSS signal.

[0016] Compared with the prior art, the beneficial effects of the BeiDou short message transceiver system provided by this utility model are as follows: The BeiDou short message transceiver system of this utility model is equipped with an outdoor antenna, a first indoor antenna, a second indoor antenna, and a signal processing unit. The signal processing unit includes a power divider, a first amplifier, a second amplifier, and a third amplifier. The power divider receives outdoor satellite signals and distributes their power into S-band signals and GNSS signals. The first amplifier amplifies and outputs the GNSS signals and forwards them to the indoor area through the first indoor antenna. The second amplifier amplifies and outputs the S-band signals and forwards them to the indoor area through the second indoor antenna. This allows outdoor satellite signals to be introduced into the indoor area or other areas with weak satellite signals. The second indoor antenna receives indoor L-band signals, and the L-band signals are amplified by the third amplifier and then transmitted to the outdoor antenna, thus realizing signal transmission and reception. Therefore, the BeiDou short message transceiver system of this application can meet the communication needs of indoor areas or other areas with weak satellite signals and help achieve indoor positioning. Attached Figure Description

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a structural block diagram of the Beidou short message transceiver system provided in this embodiment of the utility model;

[0019] Figure 2 This is a circuit diagram of the Beidou short message transceiver system provided in this embodiment of the utility model.

[0020] The labels for the attached figures are as follows:

[0021] 1. Outdoor antenna; 2. Signal processing unit; 21. Power divider; 22. First amplifier; 23. Second amplifier; 24. Third amplifier; 25. First filter; 26. Second filter; 27. Third filter; 28. Fourth filter; 3. First indoor antenna; 4. Second indoor antenna; 5. Attenuator; 6. Main control chip; 7. Communication interface; 8. Buttons; 9. Display screen;

[0022] C1, first capacitor; C2, second capacitor; C2, third capacitor; L1, first inductor; L2, second inductor; R1, resistor. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] This utility model embodiment provides a BeiDou short message transceiver system, such as... Figures 1-2As shown, the BeiDou short message transceiver system includes: an outdoor antenna 1, a first indoor antenna 3, a second indoor antenna 4, and a signal processing unit 2; the signal processing unit 2 includes a power divider 21, a first amplifier 22, a second amplifier 23, and a third amplifier 24. The input terminal of the power divider 21 is connected to the outdoor antenna 1, and the output terminal of the power divider 21 is connected to the input terminals of the first amplifier 22 and the second amplifier 23. The output terminal of the first amplifier 22 is connected to the first indoor antenna 3, the output terminal of the second amplifier 23 is connected to the second indoor antenna 4, and the input terminal of the third amplifier 24 is connected to the second indoor antenna 4, and the output terminal is connected to the outdoor antenna 1.

[0025] The outdoor antenna 1 receives satellite signals and transmits them to the power divider 21. The power divider 21 distributes the power of the satellite signals into S-band and GNSS signals. The GNSS signal is transmitted to the first amplifier 22, which amplifies the GNSS signal and transmits it indoors through the first indoor antenna 3. The S-band signal is transmitted to the second amplifier 23, which amplifies the S-band signal and transmits it indoors through the second indoor antenna 4. The second indoor antenna 4 receives the L-band signal from indoors and transmits it to the third amplifier 24, which amplifies the L-band signal and transmits it outdoors through the outdoor antenna 1.

[0026] The BeiDou short message transceiver system of this embodiment is configured with an outdoor antenna 1, a first indoor antenna 3, a second indoor antenna 4, and a signal processing unit 2. The signal processing unit includes a power divider 21, a first amplifier 22, a second amplifier 23, and a third amplifier 24. The power divider receives outdoor satellite signals and distributes their power into S-band signals and GNSS signals. The first amplifier 22 amplifies the GNSS signal and outputs it, which is then relayed indoors through the first indoor antenna 3. The second amplifier 23 amplifies the S-band signal and outputs it, which is then relayed indoors through the second indoor antenna 4. This allows outdoor satellite signals to be introduced indoors or into areas with weak satellite signals. The second indoor antenna 4 receives indoor L-band signals, which are then amplified by the third amplifier 24 and transmitted externally through the outdoor antenna 1, thus achieving signal transmission and reception. Therefore, the BeiDou short message transceiver system of this application can meet the communication needs of indoor areas or areas with weak satellite signals, and help achieve indoor positioning.

[0027] The BeiDou short message transceiver system of this application supports the forwarding of GNSS and BeiDou short messages. The short message communication service can provide services to users worldwide, especially providing an effective communication means in areas without terrestrial network coverage. The outdoor antenna 1 can communicate with the BeiDou satellite system, receive satellite signals, and use the BeiDou satellite system to send and receive information without relying on terrestrial communication networks, ensuring communication reliability. Even in remote areas or areas with poor terrestrial communication network coverage, it can guarantee stable information transmission, featuring low cost and wide coverage. It can effectively supplement terrestrial mobile communication networks and meet the needs of emergency communication, search and rescue, and other services in areas without terrestrial network coverage.

[0028] In specific implementation, outdoor antenna 1 is a one-line communication antenna that communicates with the BeiDou satellite navigation system, including sending and receiving short message communication signals, providing reliable data transmission for the BeiDou short message transceiver system. The first indoor antenna 3 is a passive GNSS antenna used to receive indoor GNSS signals; the second indoor antenna 4 is a passive short message antenna used to receive indoor S-beam signals and transmit the received data outdoors via uplink. Indoor users can send short messages through the short message device and further transmit them outdoors through the BeiDou short message transceiver system of this embodiment. The first amplifier 22 is a 1150-1650MHz amplifier, and the second amplifier 23 is an LNA (Low-Noise Amplifier) ​​amplifier.

[0029] refer to Figure 1 In this embodiment, the Beidou short message transceiver system also includes an attenuator 5 and a main control chip 6. The main control chip 6 is used to output control signals to the attenuator 5. The attenuator 5 is located between the first amplifier 22 and the first indoor antenna 3. The attenuator 5 is used to adjust the gain of the GNSS signal under the control signal and send the adjusted GNSS signal to the indoor area through the first indoor antenna 3.

[0030] Attenuator 5 is a programmable attenuator, employing a programmable attenuator chip. The communication pins of the programmable attenuator chip are connected to the main control chip 6, receiving control signals from the main control chip 6 to control the attenuation value. The programmable attenuator chip integrates attenuation elements, control circuits, and interface circuits into a single chip, allowing users to easily adjust the signal attenuation. It can be implemented using existing chips such as the AD8318 and HMC1119.

[0031] By adding attenuator 5 and main control chip 6, the BeiDou short message transceiver system can more flexibly adjust the gain of the GNSS signal to meet the required signal strength. This design helps optimize system performance and improve signal stability and reliability in indoor environments.

[0032] refer to Figure 2In this embodiment, the power divider 21 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L1, a second inductor L2, and a resistor R1. The first terminals of the first capacitor C1, the first inductor L1, and the second inductor L2 are connected to the outdoor antenna 1. The second terminal of the first capacitor C1 is connected to the first terminals of the second capacitor C2 and the third capacitor C3. The second terminals of the first inductor L1 and the second capacitor L2 are connected to the first terminal of the resistor R1 and the first amplifier 22. The second terminals of the second inductor L1 and the third capacitor C3 are connected to the second terminal of the resistor R1 and the second amplifier 23.

[0033] The power divider 21 is constructed using a first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L1, a second inductor L2, and a resistor R1. In practice, the impedance is matched to 50 ohms to split the satellite signal received from the outdoor antenna 1 and send it to the first amplifier 22 and the second amplifier 23 respectively, thereby realizing the power distribution of the satellite signal and providing a stable and reliable signal source for subsequent amplification and transmission.

[0034] refer to Figure 2 In this embodiment, the signal processing unit 2 further includes a first filter 25, which is disposed between the power divider 21 and the second amplifier 23.

[0035] The first filter 25 is a 2.4G filter. Its main function is to filter out unwanted frequency components or noise in the S-band signal output by the power divider 21. This helps ensure that the S-band signal transmitted to the second amplifier 23 is pure and of high quality, thereby improving the performance and reliability of the entire system. By removing potential interference signals, the first filter 25 can also protect the second amplifier 23 from damage. Interference signals may cause amplifier overload or performance degradation, and the presence of the filter helps to mitigate this risk. By precisely controlling the frequency range of the signal passing through the filter, the overall performance of the system can be further optimized, which helps to ensure that the system can maintain stable and efficient operation under different indoor environments and operating conditions.

[0036] refer to Figure 2 In this embodiment, the signal processing unit 2 further includes a second filter 26, which is disposed between the second amplifier 23 and the second indoor antenna 4.

[0037] The second filter 26 is a 2.4G filter. By setting the second filter 26 and the first filter 25 together in the downlink path of the S-band signal, a two-stage filter is formed. After the S-band signal is amplified by the second amplifier 23, the second filter 26 will further filter out noise or unwanted frequency components that may be introduced by the second amplifier 23. This ensures that the S-band signal transmitted indoors through the second indoor antenna is of high quality and clean.

[0038] refer to Figure 2 In this embodiment, the signal processing unit 2 further includes a third filter 27, which is disposed between the second indoor antenna 4 and the third amplifier 24.

[0039] The third filter 27 employs a 1.6G filter. Before the L-band signal is received from the second indoor antenna 4 and transmitted to the third amplifier 24, i.e., on the uplink path of the L-band signal, the third filter 27 preprocesses the indoor signal. This includes removing noise, interference, and other unwanted frequency components from the signal to ensure the quality and purity of the L-band signal. The third filter 27 also prevents potential interference signals or excessive signal amplitude from damaging the third amplifier 24. By limiting the frequency range of signals entering the third amplifier 24, the third filter 27 helps maintain the stability and performance of the third amplifier 24. By precisely controlling the frequency range of signals passing through the third filter 27, the overall performance of the system can be further optimized. This helps ensure that the system can stably receive and transmit L-band signals under various indoor environments and operating conditions.

[0040] refer to Figure 2 In this embodiment, the signal processing unit 2 further includes a fourth filter 28, which is disposed between the third amplifier 24 and the outdoor antenna 1.

[0041] The first filter 28 uses a 1.6G filter. By setting the fourth filter 28 and the third filter 27, a two-stage filter is formed on the uplink path of the L-band signal. After the L-band signal is amplified by the third amplifier 24, the fourth filter 28 will further filter out noise or unwanted frequency components that may be introduced by the third amplifier 24. This ensures that the L-band signal transmitted to the outside through the outdoor antenna is of high quality and pure. This helps to ensure that the system can stably transmit and receive Beidou satellite signals in complex indoor environments.

[0042] refer to Figure 2 In this embodiment, the signal processing unit 2 further includes a communication interface 7 connected to the main control chip 6. The communication interface 7 is used to receive signal gain instructions from external terminal devices.

[0043] The communication interface 7 can receive signal gain commands from external terminal devices (such as smartphones, tablets, or dedicated control devices). The received gain commands are transmitted to the main control chip 6, which controls the signal gain of the GNSS path according to the command. This helps ensure optimal signal reception and transmission performance in various environments. By allowing external terminal devices to send gain commands, the system becomes more flexible and configurable. External terminal devices typically have user-friendly interfaces and easy-to-operate functions, which not only improves the user experience but also increases the system's usability and practicality. The main control chip's output of control signals to control the attenuator can be implemented using existing microcontrollers. This application includes the specific hardware structure of the main control chip, communication interface, and attenuator. Some hardware components involve software programs during operation. The software programs that assist the operation of this Beidou short message transceiver system are all existing, reproducible software programs and do not constitute the innovation of this application.

[0044] refer to Figure 2 In this embodiment, the main control chip 6 is connected to a button 8, and the main control chip 6 outputs a control signal under the pressing signal of the button 8.

[0045] Button 8 provides users with a simple and intuitive manual control method. Users can press button 8 to trigger the main control chip 6 to output specific control signals, thereby adjusting the system's operating status or parameters. By adding button 8, the system becomes easier to operate and control. Users can control the system through simple button 8 operation without relying on external terminal devices or complex setup steps. Button 8 operation usually has a fast response speed, providing an immediate and effective control method. Compared with external terminal devices or complex control systems, button 8 has a lower hardware cost, which helps to reduce the overall cost of the system and improve its cost-effectiveness.

[0046] refer to Figure 2 In this embodiment, the main control chip 6 is also connected to a display screen 9, which is used to display the signal gain of the GNSS signal.

[0047] Display screen 9 can display the signal gain of the GNSS signal in real time, allowing users to intuitively understand the current signal gain of the system's GNSS signal. Display screen 9 provides an intuitive user interface, making the system easier to operate and understand. Users can better grasp the system's operating status by observing the information on display screen 9, thus using the system with greater confidence. Display screen 9 can be an LED digital tube.

[0048] The BeiDou short message transceiver system of this application embodiment can realize signal transmission and reception, ensuring normal indoor communication. It can be applied to the testing and development of satellite navigation equipment, ensuring that the equipment can receive accurate satellite signals even in indoor environments, and conducting necessary performance tests and verifications. Alternatively, it can be applied in the aerospace field to monitor and control the navigation system of aircraft, ensuring its communication capabilities during indoor testing and maintenance. Or, it can be applied to BeiDou location services for smart terminals, where smartphones, wearable devices, and other smart terminals can utilize this BeiDou short message transceiver system to improve positioning capabilities in indoor or other obstructed areas, building a seamless and continuous indoor and outdoor positioning service system. Or, it can be applied to vehicle terminals, where vehicles can use this BeiDou short message transceiver system to assist in positioning, improving vehicle safety and rescue efficiency. Or, it plays an important role in critical areas concerning national welfare and people's livelihoods, such as emergency communication, emergency rescue, and disaster prevention and mitigation, especially in areas without terrestrial network coverage. Or, it provides communication services in industries such as hydrology and water conservancy, marine fisheries, and petroleum and petrochemicals, especially providing effective communication means during field or offshore operations.

[0049] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. A BeiDou short message transceiver system, characterized in that, include: An outdoor antenna, a first indoor antenna, a second indoor antenna, and a signal processing unit; the signal processing unit includes a power divider, a first amplifier, a second amplifier, and a third amplifier. The input terminal of the power divider is connected to the outdoor antenna, and the output terminal of the power divider is connected to the input terminals of the first and second amplifiers. The output terminal of the first amplifier is connected to the first indoor antenna, the output terminal of the second amplifier is connected to the second indoor antenna, and the input terminal of the third amplifier is connected to the second indoor antenna, while the output terminal is connected to the outdoor antenna. The outdoor antenna is used to receive satellite signals and transmit them to the power divider. The power divider is used to distribute the power of the satellite signals into S-band signals and GNSS signals. The GNSS signals are transmitted to the first amplifier, which amplifies the GNSS signals and transmits them indoors through the first indoor antenna. The S-band signal is transmitted to the second amplifier, which amplifies the S-band signal and transmits it indoors via the second indoor antenna. The second indoor antenna receives the L-band signal indoors and transmits the L-band signal to the third amplifier, which amplifies the L-band signal and transmits it outdoors via the outdoor antenna.

2. The BeiDou short message transceiver system according to claim 1, characterized in that, The BeiDou short message transceiver system also includes an attenuator and a main control chip. The main control chip is used to output a control signal to the attenuator. The attenuator is located between the first amplifier and the first indoor antenna. The attenuator is used to adjust the gain of the GNSS signal under the control signal and transmit the adjusted GNSS signal to the indoor environment through the first indoor antenna.

3. The BeiDou short message transceiver system according to claim 1, characterized in that, The power divider includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor, and a resistor. The first terminals of the first capacitor, the first inductor, and the second inductor are connected to the outdoor antenna. The second terminal of the first capacitor is connected to the first terminals of the second and third capacitors. The second terminals of the first and second inductors are connected to the first terminal of the resistor and the first amplifier. The second terminals of the second inductor and the third capacitor are connected to the second terminal of the resistor and the second amplifier.

4. The BeiDou short message transceiver system according to claim 1, characterized in that, The signal processing unit further includes a first filter, which is disposed between the power divider and the second amplifier.

5. The BeiDou short message transceiver system according to claim 4, characterized in that, The signal processing unit further includes a second filter, which is disposed between the second amplifier and the second indoor antenna.

6. The BeiDou short message transceiver system according to claim 1, characterized in that, The signal processing unit further includes a third filter, which is disposed between the second indoor antenna and the third amplifier.

7. The BeiDou short message transceiver system according to claim 6, characterized in that, The signal processing unit further includes a fourth filter, which is disposed between the third amplifier and the outdoor antenna.

8. The BeiDou short message transceiver system according to claim 2, characterized in that, The signal processing unit also includes a communication interface connected to the main control chip, which is used to receive signal gain commands from external terminal devices.

9. The BeiDou short message transceiver system according to claim 2, characterized in that, The main control chip is connected to a button, and the main control chip outputs the control signal when the button is pressed.

10. The BeiDou short message transceiver system according to claim 2, characterized in that, The main control chip is also connected to a display screen, which is used to display the signal gain of the GNSS signal.

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