Navigation signal enhancement system and method

Abstract

The invention discloses a navigation signal enhancement system and method, and relates to the technical field of navigation. The navigation signal enhancement system comprises a timing system control unit, a signal processing unit and a signal enhancement unit which are connected in sequence, wherein the timing system control unit is used for receiving a first navigation signal transmitted by a navigation satellite and unifying the time frequency of a base station according to the first navigation signal; the signal processing unit is used for generating a second navigation signal according to the first navigation signal and the working mode of the base station, and the second navigation signal at least comprises a position signal, a time delay signal and a clock correction signal; the signal enhancement unit is used for generating a third navigation signal according to the first navigation signal and the second navigation signal, and the third navigation signal is a navigation enhancement signal for accurately positioning the terminal. The navigation signal enhancement system and the navigation signal enhancement method provided by the invention can be used for accurately positioning and navigating the low-altitude traffic tool under low-altitude economy.

Description

Technical Field

[0001] The present application relates to the field of navigation technology, and in particular to a navigation signal enhancement system and method. Background Art

[0002] Low-altitude economy refers to the use of low-altitude airspace resources, through the innovative development of low-altitude transportation tools and technologies, to promote economic growth and industrial integration in multiple fields such as aviation industry, tourism, logistics, and emergency rescue. With the continuous advancement of science and technology and the rapid development of the aviation industry, low-altitude economy is gradually becoming an important part of the global economy. Realizing high-safety, high-reliability, three-dimensional high-precision navigation and positioning of low-altitude transportation tools has become the most urgent service demand for the development of low-altitude economy in cities in the future.

[0003] In the existing technology, accurate navigation and positioning of low-altitude vehicles are usually achieved through high-precision global positioning systems, Beidou satellite navigation systems and ground-based auxiliary systems. However, the existing technology is prone to problems such as insufficient anti-interference ability, limited obstacle avoidance ability, imperfect regulatory system and backward infrastructure, and cannot ensure the safety and efficient operation of low-altitude transportation. Therefore, how to accurately position and navigate low-altitude vehicles in the low-altitude economy has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] In order to address the deficiencies of the prior art, the purpose of the present application is to provide a navigation signal enhancement system and method that can accurately locate and navigate low-altitude vehicles under low-altitude economy.

[0005] To achieve the above objectives, this application adopts the following technical solutions: In a first aspect, a navigation signal enhancement system is provided, comprising a timing control unit, a signal processing unit and a signal enhancement unit connected in sequence; the timing control unit is used to receive a first navigation signal transmitted by a navigation satellite, and unify the time and frequency of the base station according to the first navigation signal; the signal processing unit is used to generate a second navigation signal according to the first navigation signal and the working mode of the base station, the second navigation signal at least including a position signal, a delay signal and a clock correction signal, the base station working mode includes a compensation regeneration mode and a compatible independent regeneration mode, the compensation regeneration mode is used when the first navigation signal is greater than a preset threshold, and the compatible independent regeneration mode is used when the first navigation signal is less than a preset threshold; the signal enhancement unit is used to generate a third navigation signal according to the first navigation signal and the second navigation signal, the third navigation signal being a navigation enhancement signal for accurately positioning the terminal.

[0006] Furthermore, if the base station is in an area with full coverage of navigation satellite signals, the timing control unit determines that the timing mode for the base station is a navigation satellite timing mode; if the base station is in an area with semi-coverage of navigation satellite signals, the timing control unit determines that the timing mode for the base station is a timing mode that combines navigation satellite timing and base station timing; if the base station is in an area with no coverage of navigation satellite signals, the timing control unit determines that the timing mode for the base station is a timing mode that combines multiple base stations.

[0007] Furthermore, the base station includes a first base station and a second base station, and the timing synchronization method of the multiple base stations includes: the timing control unit in the first base station generates a modulated synchronization pulse signal according to the first navigation signal and sends it to the second base station; the timing control unit in the second base station receives the modulated synchronization pulse signal to synchronize the time and frequency of the first base station.

[0008] Furthermore, the timing control unit is also used to calculate the time-frequency deviation of the first navigation signal, and adjust the voltage-controlled voltage according to the time-frequency deviation to calibrate the time-frequency of the base station, and send the calibrated time-frequency to the signal enhancement unit.

[0009] Furthermore, the signal enhancement unit receives the calibrated time and frequency, and determines a reference signal according to a phase-locked loop technology; baseband modulates and outputs a radio frequency to the second navigation signal according to the reference signal to obtain a third navigation signal.

[0010] Furthermore, the signal processing unit is also used to monitor the status information of the base station and send the status information of the base station to the base station server connected to the base station. The status information of the base station at least includes the power, temperature, power consumption and interface status of the base station.

[0011] Furthermore, the signal processing unit is also used to monitor the spatial information data of the area where the base station is located, and integrate the spatial information data, where the spatial information data at least includes the signal strength and environmental information of the navigation satellite; the signal processing unit sends the result of the integration processing to the time system control unit, where the result of the integration processing includes the navigation satellite signal coverage range of the area where the base station is located.

[0012] Furthermore, the base station also includes a network communication unit for processing and forwarding navigation signals. The network communication unit includes a communication link subunit and a WIFI routing link subunit. The communication link subunit is used to interact with the base station server for data, and the WIFI routing link subunit is used to communicate wirelessly with the terminal.

[0013] Furthermore, the base station also includes a base station control unit, which is used to adjust the switch of the base station according to the number of terminals around the base station.

[0014] In a second aspect, a navigation signal enhancement method is provided, the method comprising: receiving a first navigation signal transmitted by a navigation satellite, and unifying the time and frequency of a base station according to the first navigation signal; generating a second navigation signal according to the first navigation signal and an operating mode of the base station, the second navigation signal comprising at least a position signal, a delay signal and a clock correction signal, the base station operating mode comprising a compensation regeneration mode and a compatible independent regeneration mode, the compensation regeneration mode being used when the first navigation signal is sufficient, and the compatible independent regeneration mode being used when the first navigation signal is insufficient; generating a third navigation signal according to the first navigation signal and the second navigation signal, the third navigation signal being a navigation enhancement signal for accurately positioning the terminal.

[0015] Based on the above scheme, the present application proposes a navigation signal enhancement system and method, wherein the navigation signal enhancement system includes a time control unit, a signal processing unit and a signal enhancement unit. First, the time control unit unifies the time and frequency of the base station according to the first navigation signal transmitted by the navigation satellite. Then the signal processing unit generates a second navigation signal according to the first navigation signal and the working mode of the base station. Finally, the signal enhancement unit generates a third navigation signal according to the first navigation signal and the second navigation signal, and the generated third navigation signal is a navigation enhancement signal for accurately positioning the terminal. Compared with the prior art, the navigation signal enhancement system proposed in the present application can accurately locate and navigate low-altitude vehicles in the low-altitude economy, improve the overall performance of the navigation system, meet the needs of high-precision positioning and navigation in different scenarios, and at the same time ensure the reliability and continuity of navigation services in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a navigation signal enhancement system provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a time system control unit in a navigation signal enhancement system provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a network communication unit in a navigation signal enhancement system provided in an embodiment of the present application; Figure 4 A flowchart schematic diagram of a navigation signal enhancement method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the specific implementation manner of the present application will be clearly and completely described below in conjunction with the drawings in the implementation manner of the present application.

[0018] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0019] It should also be understood that the term “comprising” indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components.

[0020] like Figure 1 , which is a schematic diagram of the structure of a navigation signal enhancement system 100 provided in an embodiment of the present application.

[0021] Among them, the navigation signal enhancement system 100 is applied to one or more base stations. The base stations can be deployed at the top of the smart lamp pole, and the storage of the base stations can be achieved through the smart lamp pole honeycomb.

[0022] The navigation signal enhancement system 100 includes a timing control unit 11 , a signal processing unit 12 and a signal enhancement unit 13 which are connected in sequence.

[0023] The time synchronization control unit 11 is used to receive a first navigation signal transmitted by a navigation satellite, and unify the time and frequency of the base station according to the first navigation signal to ensure the time accuracy and frequency stability in the communication network. The first navigation signal includes at least the time and frequency signal of the navigation satellite. For example, the navigation satellite can be a satellite in the Global Navigation Satellite System (GNSS).

[0024] As an implementation method, the navigation satellite sends atomic time to the base station via a satellite signal. Accordingly, the time control unit 11 in the base station receives time information from the navigation satellite. The time control unit 11 obtains an accurate timestamp and corrects the local clock to achieve synchronization with the navigation satellite time. The time control unit 11 receives the frequency information of the navigation satellite signal and adjusts the frequency of the local oscillator to keep it consistent with the navigation satellite clock, thereby achieving synchronization with the navigation satellite time.

[0025] The timing control unit 11 is also used to determine the timing mode for the base station. Timing for the base station means transmitting accurate time information to the base station through technical means such as transmitting signals by navigation satellites to ensure that the base station and its connected devices can accurately synchronize time.

[0026] As a way to achieve this, Figure 2 As shown, the timing control unit 11 may include a GNSS timing subunit 111, a clock training subunit 112, a self-organizing network two-way comparison subunit 113 and a precision fine-tuning and clock parameter generation subunit 114. Each subunit in the timing control unit 11 performs timing for the base station individually or in combination. The timing mode may include a navigation satellite timing mode, a timing mode combining navigation satellite timing with base station timing, and a timing mode combining multiple base stations.

[0027] Specifically, if the base station is in an area fully covered by navigation satellite signals, the GNSS timing subunit 111 in the timing control unit 11 determines that the timing mode for the base station is the navigation satellite timing mode.

[0028] If the base station is in the semi-coverage area of ​​the navigation satellite signal, the GNSS timing subunit 111 and the clock training subunit 112 in the timing control unit 11 determine that the timing mode for the base station is a timing mode combining the navigation satellite timing and the base station timing.

[0029] If the base station is in an area where the navigation satellite signal has no coverage, the self-organizing network two-way comparison subunit 113 in the time synchronization control unit 11 determines that the timing mode for the base station is a timing mode of a combination of multiple base stations. For example, the base station includes a first base station and a second base station, and the time synchronization control unit 11 in the first base station generates a modulated synchronization pulse signal according to the first navigation signal and sends it to the second base station. The time synchronization control unit 11 in the second base station receives the modulated synchronization pulse signal to synchronize the time and frequency of the first base station.

[0030] It should be noted that the base station is in the signal coverage area of ​​the navigation satellite through the signal processing unit 12. Specifically, the signal processing unit 12 monitors the spatial information data of the area where the base station is located and integrates and processes it to obtain the navigation satellite signal coverage range of the area where the base station is located, and sends it to the time system control unit 11. Among them, the spatial information data at least includes the signal strength and environmental information of the navigation satellite in the area where the base station is located. For example, the environmental information may include information such as humidity and wind force.

[0031] It should also be noted that the precision fine-tuning and clock parameter generating subunit 114 in the timing control unit 11 is used to ensure accurate reception and transmission of the first navigation signal.

[0032] The signal processing unit 12 is used to generate a second navigation signal according to the first navigation signal and the working mode of the base station.

[0033] The second navigation signal is navigation parameter information, and the navigation parameter information at least includes a position signal, a delay signal and a clock correction signal.

[0034] The base station working mode includes a compensation regeneration mode and a compatible independent regeneration mode. The compensation regeneration mode is used when the first navigation signal is greater than a preset threshold, and the compatible independent regeneration mode is used when the first navigation signal is less than a preset threshold.

[0035] As an implementation, in the compensation regeneration working mode, the first navigation signal received by the data processing unit 12 is greater than a preset threshold, and the data processing unit 12 analyzes and processes the first navigation signal to compensate for the influence of environmental factors on the processing performance. For example, if the first navigation signal is greater than the preset threshold, the data processing unit 12 will generate a second navigation signal that is less affected by the environment, including navigation parameters such as a position signal, a delay signal, and a clock correction signal, to ensure high accuracy and high reliability of the system.

[0036] Exemplarily, in an unobstructed environment, a reasonable base station installation location, and a scenario of minimized electromagnetic interference, the satellite signal received by the base station is greater than a preset threshold.

[0037] As an implementation, in the compatible independent regeneration working mode, when the first navigation signal received by the data processing unit 12 is less than a preset threshold, the data processing unit 12 not only needs to perform compensation calculations, but also needs to be able to independently generate a second navigation signal. In the absence of the first navigation signal transmitted by the navigation satellite, the data processing unit 12 generates the second navigation signal according to the algorithm in the data processing unit 12, which includes the position signal, the delay signal and the clock correction signal, and also includes a signal dynamic feature control word.

[0038] Exemplarily, the navigation signal of the base station is less than a preset threshold in the presence of obstructions, equipment failure, and electromagnetic interference.

[0039] The signal processing unit 12 is further configured to monitor the status information of the base station and send the status information of the base station to a base station server connected to the base station.

[0040] The status information of the base station includes at least the power level, temperature, power consumption and interface status of the base station.

[0041] As an implementation method, the signal processing unit 12 monitors and collects data when the base station is working, including key performance data such as power, temperature, power consumption and interface status of the base station. The signal processing unit 12 sends the status information of the base station to the base station server, and the base station server performs data analysis on the status information of the base station to determine whether the operating status of the base station is normal, and take corresponding measures in the case of abnormality.

[0042] As another implementation, the signal processing unit 12 monitors and collects data when the base station is working, and analyzes the data to determine whether the base station is operating normally. The signal processing unit 12 generates a base station status information report based on the analysis results, including the operating status of the base station, whether there is an abnormality, and the measures to be taken. The signal processing unit 12 automatically performs an inspection process based on the base station status information report to check whether various parts of the base station need maintenance or replacement.

[0043] The signal enhancement unit 13 is configured to generate a third navigation signal according to the first navigation signal and the second navigation signal.

[0044] Among them, the third navigation signal is a navigation enhancement signal for accurately positioning the terminal.

[0045] As an implementation method, the time control unit 11 calculates the time-frequency deviation of the first navigation signal, and adjusts the voltage control voltage according to the time-frequency deviation to calibrate the time-frequency of the base station, and sends the calibrated time-frequency to the signal enhancement unit 13. Correspondingly, the signal enhancement unit 13 receives the calibrated time-frequency and determines the reference signal according to the phase-locked loop technology. The phase-locked loop technology completes the reference clock generation of information such as code, phase, and telegram according to the calibrated time-frequency, and ensures the synchronization of the output signal with the input signal by locking the phase of the input signal.

[0046] The signal enhancement unit 13 performs baseband modulation and RF output on the second navigation signal according to the reference signal to obtain a third navigation signal. Baseband modulation is the process of encoding the second navigation signal onto a carrier, which includes operations such as symbol mapping and modulation of the second navigation signal. RF output refers to converting the baseband signal into a high-frequency signal suitable for wireless transmission and sending the high-frequency signal to the terminal, thereby enhancing the navigation signal.

[0047] With the support of the timing control unit 11, the signal enhancement unit 13 can calibrate the time and frequency of the base station, and combine the phase-locked loop technology and the navigation information provided by the signal processing unit 12 to complete the baseband modulation and RF output of the navigation enhancement signal, which not only improves the accuracy and reliability of the navigation signal, but also ensures that users can obtain high-quality positioning services.

[0048] Based on the above scheme, the present application proposes a navigation signal enhancement system, including a time synchronization control unit, a signal processing unit and a signal enhancement unit. First, the time synchronization control unit unifies the time and frequency of the base station according to the first navigation signal transmitted by the navigation satellite. Then the signal processing unit generates a second navigation signal according to the first navigation signal and the working mode of the base station. Finally, the signal enhancement unit generates a third navigation signal based on the first navigation signal and the second navigation signal, and the generated third navigation signal is a navigation enhancement signal for accurately positioning the terminal. Compared with the prior art, the navigation signal enhancement system proposed in the present application can accurately locate and navigate low-altitude vehicles under the low-altitude economy, improve the overall performance of the navigation system, meet the needs of high-precision positioning and navigation in different scenarios, and at the same time ensure the reliability and continuity of navigation services in complex environments.

[0049] The navigation signal enhancement system 100 further includes: a network communication unit 14 and a base station control unit 15. The network communication unit 14 is connected to the time control unit 11 and the signal processing unit 12 respectively, and the base station control unit 15 is connected to the signal processing unit 12.

[0050] The network communication unit 14 is used for processing and forwarding navigation signals, such as Figure 3 As shown, the network communication unit 14 includes a communication link subunit 141 and a WIFI routing link subunit 142. The communication link subunit 141 is used to perform data interaction with the base station server, and the WIFI routing link subunit 142 is used to perform wireless communication with the terminal.

[0051] As an implementation method, the network communication unit 14 is used to establish a communication connection with a base station server and / or a terminal to process and forward navigation signals. The communication link subunit 141 is used to ensure that the base station quickly receives and sends a large amount of data to the base station server through a 4G / 5G link. The WIFI routing link subunit 142 optimizes signal coverage by adjusting the frequency band and power of the WIFI routing to ensure the communication quality of terminal devices in the low airspace. In addition, the network communication unit 14 can also automatically select the best communication link based on factors such as communication requirements, signal quality, and network load through the base station intelligent algorithm.

[0052] The network communication unit 14 realizes real-time interaction between the base station and the base station server through the 4G / 5G link, and solves the problem of low-altitude dense communication link selection by adding node WIFI routing, which not only improves the network coverage and communication quality, but also enhances the network's adaptability and overall performance, and improves communication efficiency.

[0053] The base station control unit 15 is used to adjust the switch of the base station according to the number of terminals around the base station.

[0054] As an implementation method, the base station control unit 15 detects the existence and quantity of the terminal device and performs accurate location measurement by establishing a communication connection with the terminal device. For example, when the terminal device communicates with the base station, the base station can identify the unique identifier (such as IMEI) of the terminal device, thereby determining the existence of the terminal device. Then, the base station control unit 15 adjusts the switch of the base station according to the number of terminals around the base station.

[0055] Exemplarily, when the base station control unit 15 detects that the number of terminals in a certain area is high, the base station resources in the area are started or increased. For example, the number of base stations or channels in nearby cells is increased to meet the communication needs of the terminal devices. For another example, when the base station control unit 15 detects that the number of terminals in a certain area is low, the base station resources in the area are reduced or shut down to dynamically adjust the allocation of base station resources.

[0056] The base station control unit 15 adjusts the base station switch according to the number of terminals around the base station, which not only improves the service quality and efficiency of the base station, but also reduces energy loss, provides users with a better communication experience, and also reduces operating costs.

[0057] It should be noted that the structure of the navigation signal enhancement system 100 described in the embodiment of the present application is to more clearly illustrate the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of the system structure, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0058] like Figure 4 , which is a flowchart diagram of a navigation signal enhancement method provided in an embodiment of the present application. The control method is applicable to the above-mentioned navigation signal enhancement system 100. Specifically, the method includes the following steps: Step S401: receiving a first navigation signal transmitted by a navigation satellite, and unifying the time and frequency of the base station according to the first navigation signal.

[0059] Specifically, reference may be made to the above description of the timing control unit 11 , which will not be repeated here.

[0060] Step S402: Generate a second navigation signal according to the first navigation signal and the working mode of the base station.

[0061] Specifically, reference may be made to the above description of the signal processing unit 12 , which will not be repeated here.

[0062] Step S403: Generate a third navigation signal according to the first navigation signal and the second navigation signal.

[0063] Specifically, reference may be made to the above description of the signal enhancement unit 13 , which will not be repeated here.

[0064] Based on the above scheme, the base station of this method unifies the time and frequency of the base station according to the first navigation signal transmitted by the navigation satellite. After that, the base station generates a second navigation signal according to the first navigation signal and the working mode of the base station. Finally, the base station generates a third navigation signal according to the first navigation signal and the second navigation signal, and the generated third navigation signal is a navigation enhancement signal for accurately positioning the terminal. Compared with the prior art, the navigation signal enhancement method proposed in this application can accurately locate and navigate low-altitude vehicles under the low-altitude economy, improve the overall performance of the navigation system, meet the needs of high-precision positioning and navigation in different scenarios, and at the same time ensure the reliability and continuity of navigation services in complex environments.

[0065] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A navigation signal enhancement system, applied to a base station, characterized in that: include: A time-unification control unit, configured to receive a first navigation signal transmitted by a navigation satellite, and unify the time and frequency of the base station according to the first navigation signal; a signal processing unit, configured to generate a second navigation signal according to the first navigation signal and a working mode of the base station, wherein the second navigation signal includes at least a position signal, a delay signal, and a clock correction signal, and the working mode of the base station includes a compensation regeneration mode and a compatible independent regeneration mode, wherein the compensation regeneration mode is used when the first navigation signal is greater than a preset threshold, and the compatible independent regeneration mode is used when the first navigation signal is less than a preset threshold; The signal enhancement unit is used to generate a third navigation signal according to the first navigation signal and the second navigation signal, wherein the third navigation signal is a navigation enhancement signal for accurately positioning the terminal.

2. The navigation signal enhancement system according to claim 1, characterized in that: If the base station is in a signal full coverage area of ​​the navigation satellite, the time system control unit determines that the timing mode for the base station is the navigation satellite timing mode; If the base station is in a semi-covered area of ​​a navigation satellite signal, the timing control unit determines that the timing mode for the base station is a timing mode combining navigation satellite timing and base station timing; If the base station is located in an area where there is no coverage of navigation satellite signals, the timing control unit determines that the timing service mode for the base station is a timing service mode of a combination of multiple base stations.

3. The navigation signal enhancement system according to claim 2, characterized in that: The base station includes a first base station and a second base station, and the timing mode of the plurality of base stations includes: The timing control unit in the first base station generates a modulated synchronization pulse signal according to the first navigation signal and sends the modulated synchronization pulse signal to the second base station; The timing control unit in the second base station receives the modulated synchronization pulse signal to synchronize the time and frequency of the first base station.

4. The navigation signal enhancement system according to claim 1, characterized in that: The timing control unit is further used to calculate the time-frequency deviation of the first navigation signal, and adjust the voltage control voltage according to the time-frequency deviation to calibrate the time-frequency of the base station, and send the calibrated time-frequency to the signal enhancement unit.

5. The navigation signal enhancement system according to claim 4, characterized in that: The signal enhancement unit receives the calibrated time-frequency and determines a reference signal according to a phase-locked loop technique; The second navigation signal is baseband modulated and RF outputted according to the reference signal to obtain the third navigation signal.

6. The navigation signal enhancement system according to claim 1, characterized in that: The signal processing unit is also used to monitor the status information of the base station and send the status information of the base station to a base station server connected to the base station. The status information of the base station includes at least the power, temperature, power consumption and interface status of the base station.

7. The navigation signal enhancement system according to claim 2, characterized in that: The signal processing unit is further used to monitor the spatial information data of the area where the base station is located, and integrate the spatial information data, wherein the spatial information data at least includes the signal strength and environmental information of the navigation satellite; The signal processing unit sends the result of the integration processing to the time system control unit, and the result of the integration processing includes the coverage of the navigation satellite signal of the area where the base station is located.

8. The navigation signal enhancement system according to claim 1, characterized in that: The navigation signal enhancement system also includes a network communication unit for processing and forwarding the navigation signal. The network communication unit includes a communication link subunit and a WIFI routing link subunit. The communication link subunit is used to exchange data with the base station server, and the WIFI routing link subunit is used to communicate wirelessly with the terminal.

9. The navigation signal enhancement system according to claim 1, characterized in that: The navigation signal enhancement system further includes a base station control unit, which is used to adjust the switch of the base station according to the number of the terminals around the base station.

10. A navigation signal enhancement method, characterized in that: The method comprises: receiving a first navigation signal transmitted by a navigation satellite, and unifying the time and frequency of the base station according to the first navigation signal; generating a second navigation signal according to the first navigation signal and the working mode of the base station, wherein the second navigation signal includes at least a position signal, a delay signal and a clock correction signal, and the working mode of the base station includes a compensation regeneration mode and a compatible independent regeneration mode, wherein the compensation regeneration mode is used when the first navigation signal is sufficient, and the compatible independent regeneration mode is used when the first navigation signal is insufficient; A third navigation signal is generated according to the first navigation signal and the second navigation signal, and the third navigation signal is a navigation enhancement signal for accurately positioning the terminal.

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