Positioning system
Patent Information
- Application Number
- CN202411719179.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-03-07
Smart Images
Figure CN119575433A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of positioning technology, and in particular to a positioning system. Background Art
[0002] With the rapid development of satellite navigation technologies such as BeiDou, the Global Navigation Satellite System (GNSS) has been widely used in various fields such as navigation, timing and positioning in outdoor environments. Its high precision and global coverage make it the preferred positioning and timing technology for many scenarios, including the Internet of Things, agriculture, aerospace, etc. However, in closed spaces blocked by physical barriers such as concrete walls and metal structures (such as underground parking lots, large buildings and tunnels), external GNSS signals are blocked, and the signal coverage and accuracy in the space are limited, making it difficult to meet the positioning and timing needs in such environments.
[0003] In terms of indoor positioning, many solutions currently rely on technologies such as wireless networks (Wi-Fi), Bluetooth beacons and ultra-wideband (UWB), but are still limited by coverage and cost. In addition, some existing GNSS indoor enhancement technologies mostly use indoor micro base station broadcasts or pseudo satellites, but they still have shortcomings in signal coverage, transmission efficiency, deployment costs, etc., and are difficult to seamlessly integrate with existing indoor distributed antenna systems. Summary of the invention
[0004] In view of this, the purpose of this application is to provide a positioning system.
[0005] Based on the above objectives, the present application provides a positioning system, including:
[0006] GNSS signal acquisition module, timing module, GNSS signal processing module and room distribution feed interface;
[0007] The GNSS signal acquisition module is connected to the GNSS signal processing module, and is used to forward and / or regenerate GNSS signals, and transmit the GNSS signals to the GNSS signal processing module for processing;
[0008] The timing module is connected to the global navigation satellite system signal processing module and is used to provide a clock signal for the global navigation satellite system signal;
[0009] The room distribution feeding interface is connected to the global navigation satellite system signal processing module, and is used to receive the processed global navigation satellite system signal, and forward and distribute the global navigation satellite system signal.
[0010] In a possible implementation, the GNSS signal acquisition module includes an active forwarding receiving antenna and a GNSS signal regeneration source;
[0011] The active forwarding receiving antenna is used to collect the outdoor global navigation satellite system signal;
[0012] The GNSS signal regeneration source is used to regenerate the GNSS signal.
[0013] In a possible implementation, the active forwarding receiving antenna includes a high-precision global navigation satellite system signal receiving antenna, a bandpass filter and a low-noise amplifier;
[0014] The high-precision global navigation satellite system signal receiving antenna, bandpass filter and low-noise amplifier are connected in sequence;
[0015] The high-precision global navigation satellite system signal receiving antenna is used to obtain weak global navigation satellite system signals;
[0016] The bandpass filter is used to filter the noise in the acquired global navigation satellite system signal;
[0017] The low noise amplifier is used to amplify the filtered global navigation satellite system signal.
[0018] In a possible implementation, the timing module includes a high-precision clock;
[0019] The high-precision clock is used to provide a high-stability and high-precision clock source, and provides an accurate time reference for the global navigation satellite system signal.
[0020] In a possible implementation, the global navigation satellite system signal processing module includes a multi-mode multi-frequency global navigation satellite system signal receiving module, a radio frequency processing module and a storage and program control module; the multi-mode multi-frequency global navigation satellite system signal receiving module, the radio frequency processing module and the storage and program control module are connected in sequence;
[0021] The multi-mode multi-frequency GNSS signal receiving module is used to receive the collected and / or regenerated GNSS signal and use the clock signal provided by the timing module as a time-frequency reference;
[0022] The radio frequency processing module is used to perform data screening and filtering on the global navigation satellite system signal received by the multi-mode multi-frequency global navigation satellite system signal receiving module, and to amplify and reduce noise on the global navigation satellite system signal after screening and filtering;
[0023] The storage and program control module is used to store and resolve the global navigation satellite system signal.
[0024] In a possible implementation, the multi-mode and multi-frequency global navigation satellite system signal receiving module includes an analog-to-digital converter, a zero intermediate frequency, and a filter;
[0025] The analog-to-digital converter is used to convert the received analog global navigation satellite system signal into a digital signal;
[0026] The zero intermediate frequency is used to directly down-convert the received global navigation satellite system signal to a baseband frequency;
[0027] The filter is used to remove unnecessary frequency components in the global navigation satellite system signal.
[0028] In a possible implementation, the radio frequency processing module includes a global navigation satellite system signal surface acoustic wave filter, a low power noise amplifier and a programmable attenuator;
[0029] The GNSS signal SAW filter is used to filter out unnecessary GNSS signals;
[0030] The low power noise amplifier is used to amplify the weak global navigation satellite system signal;
[0031] The programmable attenuator is used to adjust the strength of the global navigation satellite system signal to reach a required level.
[0032] In a possible implementation, the storage and program control module includes a double data rate memory, a NAND flash memory and a microcontroller unit;
[0033] The double data rate memory and the NAND flash memory are used to store the global navigation satellite system signal data;
[0034] The microcontroller unit is used to perform the tasks of controlling and processing the global navigation satellite system signals.
[0035] In a possible implementation, the system further includes: a network connection module;
[0036] The network connection module is used to receive the processed global navigation satellite system signal and exchange information with the system server and / or positioning terminal.
[0037] In a possible implementation, the system further includes: a power management module;
[0038] The power management module is used to supply power to the global navigation satellite system signal acquisition module, the timing module, the global navigation satellite system signal processing module and the network connection module.
[0039] From the above, it can be seen that the positioning system provided by the present application includes: a global navigation satellite system signal acquisition module, a timing module, a global navigation satellite system signal processing module and a room-based feed interface; the global navigation satellite system signal acquisition module is connected to the global navigation satellite system signal processing module, for forwarding and / or regenerating global navigation satellite system signals, and transmitting the global navigation satellite system signals to the global navigation satellite system signal processing module for processing; the timing module is connected to the global navigation satellite system signal processing module, for providing a clock signal for the global navigation satellite system signal; the room-based feed interface is connected to the global navigation satellite system signal processing module, for receiving the processed global navigation satellite system signals, and forwarding and distributing the global navigation satellite system signals. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0041] Figure 1 This is a schematic diagram of the positioning system structure of an embodiment of the present application;
[0042] Figure 2 This is a schematic diagram of the structure of an active receiving and forwarding antenna according to an embodiment of the present application;
[0043] Figure 3 This is a schematic diagram of the structure of a global navigation satellite system signal processing module according to an embodiment of the present application. DETAILED DESCRIPTION
[0044] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.
[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0046] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.
[0047] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.
[0048] As an optional but non-limiting implementation, in response to receiving the user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.
[0049] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet relevant laws and regulations may also be applied to the implementation of the present disclosure.
[0050] As mentioned in the background technology section, with the rapid development of satellite navigation technologies such as Beidou, the global navigation satellite system has been widely used in various fields such as navigation, timing and positioning in outdoor environments. Its high precision and global coverage make it the preferred positioning and timing technology in many scenarios, including the Internet of Things, agriculture, aerospace, etc. However, in closed spaces blocked by physical barriers such as concrete walls and metal structures (such as underground parking lots, large buildings, and tunnels), external GNSS signals are blocked, and the signal coverage and accuracy in the space are limited, making it difficult to meet the positioning and timing needs in such environments.
[0051] In terms of indoor positioning, many current solutions rely on technologies such as wireless networks, Bluetooth beacons and UWB, but are still limited by coverage and cost. In addition, some existing GNSS indoor enhancement technologies mostly use indoor micro base station broadcasts or pseudo satellites, but they are still insufficient in terms of signal coverage, transmission efficiency, deployment costs, etc., and are difficult to integrate seamlessly with existing indoor distributed antenna systems.
[0052] Based on the above considerations, the embodiment of the present application proposes a positioning system, including: a global navigation satellite system signal acquisition module, a timing module, a global navigation satellite system signal processing module and a room-based feed interface; the global navigation satellite system signal acquisition module is connected to the global navigation satellite system signal processing module, used to forward and / or regenerate the global navigation satellite system signal, and transmit the global navigation satellite system signal to the global navigation satellite system signal processing module for processing; the timing module is connected to the global navigation satellite system signal processing module, used to provide a clock signal for the global navigation satellite system signal; the room-based feed interface is connected to the global navigation satellite system signal processing module, used to receive the processed global navigation satellite system signal, and forward and distribute the global navigation satellite system signal. The embodiment of the present application realizes a wide range of GNSS signal coverage by transmitting the optional forwarding or regenerating multi-band GNSS signal through the standard room-based system facilities at this stage, which can support stable and continuous positioning and timing inside and outside the closed space without changing the signal. The present invention does not require large-scale deployment of base stations and facilities, reduces construction and maintenance costs, and has better economic benefits. In addition, the equipment can optionally support 4 / 5G mobile communications, ensuring real-time transmission and remote control of data, and improving the flexibility and application scope of the equipment.
[0053] The technical solutions of the embodiments of the present application are described in detail below through specific examples.
[0054] refer to Figure 1 , the positioning system of the embodiment of the present application includes:
[0055] Global navigation satellite system signal acquisition module (optional GNSS acquisition unit), timing module, global navigation satellite system signal processing module (GNSS processing module) and room distribution feed interface (room distribution POI feed interface);
[0056] The GNSS signal acquisition module is connected to the GNSS signal processing module, and is used to forward and / or regenerate GNSS signals, and transmit the GNSS signals to the GNSS signal processing module for processing;
[0057] The timing module is connected to the global navigation satellite system signal processing module and is used to provide a clock signal for the global navigation satellite system signal;
[0058] The room distribution feeding interface is connected to the global navigation satellite system signal processing module, and is used to receive the processed global navigation satellite system signal, and forward and distribute the global navigation satellite system signal.
[0059] In some embodiments, the global navigation satellite system signal acquisition module includes an active forwarding receiving antenna and a global navigation satellite system signal regeneration source; the active forwarding receiving antenna is used to collect the global navigation satellite system signal outdoors; the global navigation satellite system signal regeneration source is used to regenerate the global navigation satellite system signal.
[0060] In some embodiments, the active forwarding receiving antenna includes a high-precision global navigation satellite system signal receiving antenna, a bandpass filter and a low-noise amplifier; the high-precision global navigation satellite system signal receiving antenna, the bandpass filter and the low-noise amplifier are connected in sequence; the high-precision global navigation satellite system signal receiving antenna is used to obtain the weak global navigation satellite system signal; the bandpass filter is used to filter the noise in the acquired global navigation satellite system signal; the low-noise amplifier is used to amplify the filtered global navigation satellite system signal.
[0061] refer to Figure 2 , is a schematic diagram of the structure of an active receiving and forwarding antenna according to an embodiment of the present application
[0062] like Figure 1 and Figure 2 As shown, in this embodiment, the optional GNSS acquisition unit includes a GNSS signal forwarding receiving antenna and a GNSS regeneration source, which are used to collect outdoor GNSS signals or regenerate GNSS satellite signals. A multi-mode GNSS navigation system that supports forwarding or regeneration can be optionally configured to ensure that the device can obtain stable GNSS signals in different environments through efficient signal acquisition.
[0063] The optional support for forwarding or regenerating multi-mode navigation systems includes GPS, Beidou (BDS), etc., and is highly adaptable to single Beidou systems. Furthermore, for forwarding or regenerating multi-mode navigation systems, multi-band GNSS signals can be optionally configured, and the supported frequency bands include but are not limited to L1, L2, L5, B1, B2, B3 and other frequency bands. The specific frequency band can be selected according to the environment in which the device is located and the selected navigation system.
[0064] Among them, for the regenerative acquisition method, it mainly relies on the GNSS regeneration source to simulate the real GNSS satellite signal in the closed space, and then connects to the processing module for further processing. For the forwarding acquisition method, the receiver is deployed in the open space outside various closed spaces, and is equipped with lightning arresters and other equipment to avoid affecting the original indoor antenna and feed system. Furthermore, for indoor positioning environments and positioning requirements such as underground parking lots, it is necessary to determine the performance indicators of the GNSS receiver that can achieve lossless acquisition based on the characteristics of the selected multi-mode and multi-frequency GNSS signal. Secondly, as the RF front end, the performance of the receiving antenna will affect the quality of the indoor GNSS signal coverage performance. This patent uses an active receiving and forwarding antenna composed of a high-precision GNSS receiving antenna, a bandpass filter, a low-noise amplifier, etc., which reduces the design difficulty and cost, and can meet the GNSS signal solution requirements in indoor spaces.
[0065] In some embodiments, the timing module includes a high-precision clock; the high-precision clock is used to provide a high-stability and high-precision clock source to provide an accurate time reference for the global navigation satellite system signal.
[0066] In this embodiment, in order to ensure the accuracy of the GNSS signal, the device has a built-in timing module. The timing module is composed of a main high-precision clock, which can provide a high-stability and high-precision clock source and provide an accurate time reference for the forwarded or regenerated GNSS signal.
[0067] The timing module is connected to the optional acquisition unit on the one hand to achieve real-time reception of high-precision GNSS signals, and is connected to the GNSS processing module through the serial port on the other hand to provide time information and clock signals as time-frequency references for the GNSS signals.
[0068] In some embodiments, the GNSS signal processing module comprises a multi-mode multi-frequency GNSS signal receiving module, a radio frequency processing module and a storage and program control module; the multi-mode multi-frequency GNSS signal receiving module, the radio frequency processing module and the storage and program control module are connected in sequence;
[0069] The multi-mode multi-frequency GNSS signal receiving module is used to receive the collected and / or regenerated GNSS signal and use the clock signal provided by the timing module as a time-frequency reference;
[0070] The radio frequency processing module is used to perform data screening and filtering on the global navigation satellite system signal received by the multi-mode multi-frequency global navigation satellite system signal receiving module, and to amplify and reduce noise on the global navigation satellite system signal after screening and filtering;
[0071] The storage and program control module is used to store and resolve the global navigation satellite system signal.
[0072] In some embodiments, the multi-mode and multi-frequency global navigation satellite system signal receiving module includes an analog-to-digital converter, a zero intermediate frequency and a filter; the analog-to-digital converter is used to convert the received analog global navigation satellite system signal into a digital signal; the zero intermediate frequency is used to directly down-convert the received global navigation satellite system signal to a baseband frequency; and the filter is used to remove unnecessary frequency components in the global navigation satellite system signal.
[0073] In some embodiments, the RF processing module includes a global navigation satellite system signal surface acoustic filter, a low power noise amplifier and a programmable attenuator; the global navigation satellite system signal surface acoustic filter is used to filter out unnecessary global navigation satellite system signals; the low power noise amplifier is used to amplify weak global navigation satellite system signals; the programmable attenuator is used to adjust the strength of the global navigation satellite system signal to reach a desired level.
[0074] In some embodiments, the storage and program control module includes a double data rate memory, a NAND flash memory and a microcontroller unit; the double data rate memory and the NAND flash memory are used to store the global navigation satellite system signal data; the microcontroller unit is used to perform the task of controlling and processing the global navigation satellite system signal.
[0075] refer to Figure 3 , is a schematic diagram of the structure of the global navigation satellite system signal processing module of an embodiment of the present application.
[0076] like Figure 3 As shown, in this embodiment, the collected GNSS signals are processed and forwarded by the GNSS processing module, including two parts: signal fusion and signal amplification. The signal fusion part mainly classifies and processes the collected signals according to the requirements of the solution algorithm, screens satellites with strong signals, filters out low-value data, and adds specific reference information to meet the solution requirements of the subsequent algorithm; the signal amplification part mainly amplifies the power of the original satellite signal to avoid being buried in the original mobile signal of the indoor distribution system, causing the situation that the solution cannot be made, while achieving full coverage of the GNSS signal.
[0077] Specifically, the multi-mode multi-frequency GNSS receiving module first receives the collected signal and performs preliminary processing; then, the RF processing module further filters and amplifies the signal; the filtered GNSS signal passes through the storage and program control module to store relevant information and analyze the GNSS positioning data. This processing unit is the core part of realizing the fine forwarding and processing of GNSS signals and the analysis of positioning observations.
[0078] The multi-mode and multi-frequency GNSS receiving module is composed of an analog-to-digital converter (ADC), a zero intermediate frequency, a filter, etc., and is connected to an optional GNSS acquisition unit, responsible for accessing the collected forwarded or regenerated GNSS signals, and using the clock signal provided by the timing module as a time-frequency reference.
[0079] ADC (Analog-to-Digital Converter): Converts the received analog GNSS signal into a digital signal for subsequent digital signal processing.
[0080] Zero Intermediate Frequency (Zero-IF): It is a signal processing technology that directly down-converts the RF signal to the baseband frequency, which simplifies the complexity of signal processing and helps reduce system cost and power consumption.
[0081] Filter: Used to remove unnecessary frequency components and retain the required signal frequency band, thereby reducing interference and improving signal quality.
[0082] The RF processing module is composed of RF processing devices such as a GNSS SAW filter, a low-power noise amplifier, and a programmable attenuator. The GNSS signal output by the receiving module is subjected to optional data screening and filtering by the RF processing module to obtain the required forwarded or regenerated GNSS signal and amplify and reduce noise to ensure signal quality and strength.
[0083] GNSS SAW filter: used to filter out unwanted frequency band signals and retain only the required GNSS signal band. This helps reduce interference and improve signal purity.
[0084] Low-power noise amplifier: used to amplify weak GNSS signals while minimizing the amount of additional noise, thereby improving the signal-to-noise ratio.
[0085] Programmable attenuator: used to adjust the strength of the signal to the desired level. This can optimize the signal quality under different conditions to ensure that subsequent processing devices work in the best state.
[0086] The storage and program control module is used to store and solve GNSS data, including double data rate memory (DDR), NAND flash memory (NAND Flash Memory) and processor (MCU, Microcontroller Unit), etc., for storing optional data, GNSS solution data, network data, etc., and performing display and conditional functions. Among them, the program control module can further support GNNS satellite signal analysis functions according to the optional data, including but not limited to all information that can be provided by the selected GNSS system such as ephemeris, pseudorange, carrier phase, Doppler, carrier-to-noise ratio, etc., and can be sent to the terminal via the network connection module to support local timing or positioning solution. In addition, the key control and display can adjust the amplification and display of the GNSS signal.
[0087] DDR memory: used to store temporary data and running program data, providing fast read and write access, and supporting the processor to perform efficient data processing and calculations.
[0088] Nand-flash memory: used to store long-term data, such as firmware, configuration information, and historical data. This type of memory is non-volatile, meaning that data is not lost after a power outage.
[0089] Processor MCU: Responsible for performing various control and processing tasks, including GNSS data solution, data management, condition judgment and communication with other modules. It is the core control unit of the system.
[0090] In this embodiment, the processed GNSS signal will be connected to the indoor distribution feed interface for forwarding and distribution. The indoor distribution feed interface includes a variety of communication interfaces, which can be connected to the standard indoor distribution system at this stage, support the access of multi-system access platform PoI or other combined systems, and further forward and distribute GNSS signals based on the indoor distribution system to achieve seamless signal coverage over a large range.
[0091] The communication interface includes but is not limited to an Ethernet interface, a serial interface (RS-232 or RS-485), a USB interface, etc., which facilitates the close coupling of the device with the indoor distributed system and the interaction with other devices to support the stable transmission of GNSS signals in complex indoor environments.
[0092] The standard indoor distributed systems at this stage include passive indoor distributed systems (including leaky cables) and active indoor distributed systems. The passive indoor distributed system uses high-power distributed base station RRU as the signal source, and the radio frequency signal is split through passive devices, and distributed to each pair of antennas and leaky cables installed in various areas of the closed space via feeders or leaky cables; the active indoor distributed system is generally composed of a baseband unit, a remote convergence unit and a wireless radio frequency unit, and all the equipment is active, which is used to solve the coverage and capacity absorption problems in high-traffic scenarios.
[0093] In some embodiments, the system further includes: a networking module; the networking module is used to receive the processed global navigation satellite system signal and exchange information with a system server and / or a positioning terminal.
[0094] In some embodiments, the system further includes: a power management module; the power management module is used to provide power to the global navigation satellite system signal acquisition module, the timing module, the global navigation satellite system signal processing module and the networking module.
[0095] In this embodiment, in order to ensure the normal operation and remote management of the device, the device also includes a power management module and a network connection module. The power management module uses a low dropout linear regulator (LDO) as a low dropout linear DC regulated power supply to power various modules of the device, including an optional GNSS acquisition unit, a GNSS processing module, a timing module, and a network connection module.
[0096] The network connection module is responsible for realizing the network information transmission of the equipment and exchanging information with the system server and the positioning terminal. The information interaction with the system server is mainly used for remote management and built-in parameter modification to improve the flexibility and reliability of the system; the information interaction with the positioning terminal is mainly used for the transmission of data required for positioning such as optional information and GNSS analysis information to support terminal timing or positioning solution within the coverage area of the equipment.
[0097] The networking module supports 4G / 5G mobile communications and can be optionally compatible with the mainstream frequency bands of China Mobile, China Telecom and China Unicom.
[0098] It can be seen from the above embodiments that the positioning system described in the embodiments of the present application includes: a global navigation satellite system signal acquisition module, a timing module, a global navigation satellite system signal processing module and a room-based feed-in interface; the global navigation satellite system signal acquisition module is connected to the global navigation satellite system signal processing module for forwarding and / or regenerating global navigation satellite system signals, and transmitting the global navigation satellite system signals to the global navigation satellite system signal processing module for processing; the timing module is connected to the global navigation satellite system signal processing module for providing a clock signal for the global navigation satellite system signal; the room-based feed-in interface is connected to the global navigation satellite system signal processing module for receiving the processed global navigation satellite system signals, and forwarding and distributing the global navigation satellite system signals. The embodiments of the present application achieve wide-range GNSS signal coverage by transmitting the optional forwarding or regenerating multi-band GNSS signals through the standard room-based system facilities at this stage, and can support stable and continuous positioning and timing inside and outside the closed space without changing the signal. The present invention does not require large-scale deployment of base stations and facilities, reduces construction and maintenance costs, and has better economic benefits. In addition, the equipment can optionally support 4 / 5G mobile communications, ensuring real-time transmission and remote control of data, and improving the flexibility and application scope of the equipment.
[0099] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.
[0100] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.
[0101] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
[0102] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.
Claims
1. A positioning system, characterized in that: include: GNSS signal acquisition module, timing module, GNSS signal processing module and room distribution feed interface; The GNSS signal acquisition module is connected to the GNSS signal processing module, and is used to forward and / or regenerate GNSS signals, and transmit the GNSS signals to the GNSS signal processing module for processing; The timing module is connected to the global navigation satellite system signal processing module and is used to provide a clock signal for the global navigation satellite system signal; The room distribution feeding interface is connected to the global navigation satellite system signal processing module, and is used to receive the processed global navigation satellite system signal, and forward and distribute the global navigation satellite system signal.
2. The system according to claim 1, characterized in that The GNSS signal acquisition module includes an active forwarding receiving antenna and a GNSS signal regeneration source; The active forwarding receiving antenna is used to collect the outdoor global navigation satellite system signal; The GNSS signal regeneration source is used to regenerate the GNSS signal.
3. The system according to claim 2, characterized in that The active forwarding receiving antenna includes a high-precision global navigation satellite system signal receiving antenna, a bandpass filter and a low-noise amplifier; The high-precision global navigation satellite system signal receiving antenna, bandpass filter and low-noise amplifier are connected in sequence; The high-precision global navigation satellite system signal receiving antenna is used to obtain weak global navigation satellite system signals; The bandpass filter is used to filter the noise in the acquired global navigation satellite system signal; The low noise amplifier is used to amplify the filtered global navigation satellite system signal.
4. The system according to claim 1, characterized in that The timing module includes a high-precision clock; The high-precision clock is used to provide a high-stability and high-precision clock source, and provides an accurate time reference for the global navigation satellite system signal.
5. The system according to claim 1, characterized in that The GNSS signal processing module comprises a multi-mode and multi-frequency GNSS signal receiving module, a radio frequency processing module and a storage and program control module; the multi-mode and multi-frequency GNSS signal receiving module, the radio frequency processing module and the storage and program control module are connected in sequence; The multi-mode multi-frequency GNSS signal receiving module is used to receive the collected and / or regenerated GNSS signal and use the clock signal provided by the timing module as a time-frequency reference; The radio frequency processing module is used to perform data screening and filtering on the global navigation satellite system signal received by the multi-mode multi-frequency global navigation satellite system signal receiving module, and to amplify and reduce noise on the global navigation satellite system signal after screening and filtering; The storage and program control module is used to store and resolve the global navigation satellite system signal.
6. The system according to claim 5, characterized in that The multi-mode and multi-frequency global navigation satellite system signal receiving module includes an analog-to-digital converter, a zero intermediate frequency and a filter; The analog-to-digital converter is used to convert the received analog global navigation satellite system signal into a digital signal; The zero intermediate frequency is used to directly down-convert the received global navigation satellite system signal to a baseband frequency; The filter is used to remove unnecessary frequency components in the global navigation satellite system signal.
7. The system according to claim 5, characterized in that The radio frequency processing module includes a global navigation satellite system signal surface acoustic wave filter, a low power noise amplifier and a programmable attenuator; The GNSS signal SAW filter is used to filter out unnecessary GNSS signals; The low power noise amplifier is used to amplify the weak global navigation satellite system signal; The programmable attenuator is used to adjust the strength of the global navigation satellite system signal to reach a required level.
8. The system according to claim 5, characterized in that The storage and program control module includes a double data rate memory, a NAND flash memory and a microcontroller unit; The double data rate memory and the NAND flash memory are used to store the global navigation satellite system signal data; The microcontroller unit is used to perform the tasks of controlling and processing the global navigation satellite system signals.
9. The system according to claim 1, characterized in that The system further comprises: a network connection module; The network connection module is used to receive the processed global navigation satellite system signal and exchange information with the system server and / or positioning terminal.
10. The system according to claim 9, characterized in that The system further comprises: a power management module; The power management module is used to supply power to the global navigation satellite system signal acquisition module, the timing module, the global navigation satellite system signal processing module and the networking module.