Satellite receiving module

Abstract

The utility model belongs to the technical field of positioning, and discloses a satellite receiving module. The satellite receiving module provided by the utility model comprises a Beidou satellite receiving antenna, a Beidou receiving and processing unit, a CDR receiving antenna, a CDR receiving and processing unit, a processor and a data storage unit, the Beidou satellite receiving antenna is connected with the Beidou receiving processing unit, the CDR receiving antenna is connected with the CDR receiving processing unit, the Beidou receiving processing unit and the CDR receiving processing unit are both connected with the processor, and the data storage unit is connected with the processor. According to the utility model, two receiving functions, namely a Beidou satellite signal receiving technology and a CDR signal receiving technology, are integrated on one receiving module, massive Beidou high-precision positioning can be realized by using a CDR channel, and the problem of security leakage in a communication process can be effectively avoided due to the characteristic of CDR unidirectional transmission, so that the privacy of a user can be effectively protected; the privacy and security of Beidou high-precision positioning can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of positioning technology, and more specifically, relates to a satellite receiving module. Background Technology

[0002] Currently, due to the needs of positioning technology development, BeiDou high-precision positioning technology is being applied to various industries such as transportation, agriculture, and environmental protection. Compared to the United States' Global Positioning System (GPS), which can achieve high precision without a ground-based augmentation system, my country currently requires a corresponding BeiDou ground-based augmentation system to achieve the same high precision positioning due to insufficient satellite numbers and other reasons.

[0003] The BeiDou Ground-Based Augmentation Network system is a multi-reference-station regional satellite positioning augmentation system based on the BeiDou satellite positioning system. It can broadcast real-time differential correction information using various communication methods, including satellite communication, radio data links, fixed-line telephone networks, the Global System for Mobile Communications (GSM) mobile network, and the NTRIP protocol for RTK data transmission over the Internet. However, the two-way information interaction characteristic of these existing broadcasting methods results in shortcomings in privacy and security. Utility Model Content

[0004] This invention provides a satellite receiving module that addresses the issue of insufficient privacy and security in existing BeiDou high-precision positioning technologies.

[0005] This utility model provides a satellite receiving module, including: a BeiDou satellite receiving antenna, a BeiDou receiving and processing unit, a CDR receiving antenna, a CDR receiving and processing unit, a processor, and a data storage unit; the BeiDou satellite receiving antenna is connected to the BeiDou receiving and processing unit, the CDR receiving antenna is connected to the CDR receiving and processing unit, both the BeiDou receiving and processing unit and the CDR receiving and processing unit are connected to the processor, and the data storage unit is connected to the processor.

[0006] Preferably, the BeiDou satellite receiving antenna is used to receive BeiDou satellite wireless signals and transmit the BeiDou satellite wireless signals to the BeiDou receiving and processing unit; the BeiDou receiving and processing unit is used to process the BeiDou satellite wireless signals to obtain satellite positioning information and transmit the satellite positioning information to the processor; the CDR receiving antenna is used to receive CDR wireless signals and transmit the CDR wireless signals to the CDR receiving and processing unit; the CDR receiving and processing unit is used to process the CDR wireless signals to obtain broadcast data and transmit the broadcast data to the processor; the processor is used to receive the satellite positioning information and the broadcast data, to extract differential data from the broadcast data, to perform positioning processing on the satellite positioning information to obtain positioning data, and to perform error elimination calculation on the positioning data using the differential data to obtain the calculated positioning data.

[0007] Preferably, the satellite receiving module further includes: an interface unit; the interface unit is connected to the processor; the interface unit is used to output the calculated positioning data.

[0008] Preferably, the BeiDou receiving and processing unit includes a BeiDou satellite tuning unit and a BeiDou baseband unit; the BeiDou satellite receiving antenna is connected to the BeiDou satellite tuning unit, the BeiDou satellite tuning unit is connected to the BeiDou baseband unit, and the BeiDou baseband unit is connected to the processor; the BeiDou satellite tuning unit is used to amplify, down-convert, and perform analog-to-digital conversion on the BeiDou satellite wireless signal to obtain a digital intermediate frequency signal; the BeiDou baseband unit is used to perform baseband demodulation on the digital intermediate frequency signal to obtain satellite positioning information, and transmit the satellite positioning information to the processor.

[0009] Preferably, the CDR receiving and processing unit includes a CDR tuning unit and a CDR baseband unit; the CDR receiving antenna is connected to the CDR tuning unit, the CDR tuning unit is connected to the CDR baseband unit, and the CDR baseband unit is connected to the processor; the CDR tuning unit is used to tune the CDR wireless signal, and the CDR baseband unit is used to demodulate the tuned signal and transmit the demodulated broadcast data to the processor.

[0010] Preferably, the data stored in the data storage unit includes one or more of the following: baseband demodulation data, demodulated intermediate data, and calculated positioning data.

[0011] Preferably, the data storage unit uses one of NOR FLASH, NAND FLASH, DDR2, and DDR3 for data storage.

[0012] Preferably, the interface unit includes a UART interface and / or a PPS satellite positioning module universal interface.

[0013] Preferably, the satellite receiving module has a Mini PCIe structure.

[0014] Preferably, the satellite receiving module has a general satellite receiving module structure.

[0015] One or more technical solutions provided in this utility model have at least the following technical effects or advantages:

[0016] This utility model provides a satellite receiving module comprising a BeiDou satellite receiving antenna, a BeiDou receiving and processing unit, a CDR receiving antenna, a CDR receiving and processing unit, a processor, and a data storage unit. The BeiDou satellite receiving antenna is connected to the BeiDou receiving and processing unit, the CDR receiving antenna is connected to the CDR receiving and processing unit, both the BeiDou receiving and processing unit and the CDR receiving and processing unit are connected to the processor, and the data storage unit is connected to the processor. In other words, this utility model provides a satellite receiving module with two independent wireless signal receiving and processing channels, and a unified processor and data storage unit. This utility model integrates BeiDou satellite signal receiving technology and CDR signal receiving technology into an integrated hardware receiving module, solving the current difficulty of integrating multiple modules at the application layer. This utility model integrates two receiving functions into a single receiving module, utilizing the CDR channel to achieve massive BeiDou high-precision positioning. Furthermore, due to the unidirectional transmission characteristic of CDR, it effectively avoids security leaks during communication, effectively protecting user privacy, thus improving the privacy and security of BeiDou high-precision positioning. In addition, this utility model reduces system costs by utilizing a shared processor and data storage unit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the framework of a satellite receiving module provided in an embodiment of the present utility model.

[0018] Among them, 1-BeiDou satellite receiving antenna, 2-BeiDou satellite tuning unit, 3-BeiDou baseband unit, 4-CDR receiving antenna, 5-CDR tuning unit, 6-CDR baseband unit, 7-processor, 8-data storage unit, and 9-interface unit. Detailed Implementation

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] Frequency modulation (FM) band digital audio broadcasting technology (China Digital Radio, CDR) is a technology based on digital technology, employing advanced digital audio coding, compression, and channel error correction coding modulation techniques to achieve digital processing and transmission of audio broadcast signals. Besides transmitting digital audio, CDR can also transmit real-time data such as weather, road conditions, and navigation, enabling public information coverage through broadcasting. This invention utilizes existing broadcasting resources to provide a BeiDou ground-based augmented differential data broadcasting channel to enhance information security.

[0021] This embodiment provides a satellite receiving module; see [link / reference] Figure 1 It includes: a BeiDou satellite receiving antenna 1, a BeiDou receiving and processing unit, a CDR receiving antenna 4, a CDR receiving and processing unit, a processor 7, and a data storage unit 8; the BeiDou satellite receiving antenna 1 is connected to the BeiDou receiving and processing unit, the CDR receiving antenna 4 is connected to the CDR receiving and processing unit, the BeiDou receiving and processing unit and the CDR receiving and processing unit are both connected to the processor 7, and the data storage unit 8 is connected to the processor 7.

[0022] The BeiDou satellite receiving antenna 1 is used to receive BeiDou satellite wireless signals and transmit the BeiDou satellite wireless signals to the BeiDou receiving and processing unit; the BeiDou receiving and processing unit is used to process the BeiDou satellite wireless signals to obtain satellite positioning information and transmit the satellite positioning information to the processor 7.

[0023] Specifically, the BeiDou receiving and processing unit includes a BeiDou satellite tuning unit 2 and a BeiDou baseband unit 3; the BeiDou satellite receiving antenna 1 is connected to the BeiDou satellite tuning unit 2, the BeiDou satellite tuning unit 2 is connected to the BeiDou baseband unit 3, and the BeiDou baseband unit 3 is connected to the processor 7.

[0024] The BeiDou satellite tuning unit 2 is used to amplify, down-convert, and perform analog-to-digital conversion on the BeiDou satellite wireless signal to obtain a digital intermediate frequency (IF) signal; in addition, a preferred embodiment may also include filtering processing. The BeiDou baseband unit 3 is used to perform baseband demodulation on the digital IF signal to obtain satellite positioning information, and transmit the satellite positioning information to the processor 7.

[0025] That is, after receiving the BeiDou satellite wireless signal, the BeiDou tuning unit 2 performs amplification, filtering, down-conversion and other operations to generate an intermediate frequency signal suitable for analog-to-digital conversion. After analog-to-digital conversion, the intermediate frequency signal is digitized. The BeiDou tuning unit 2 outputs the digitized signal to the BeiDou baseband unit 3 for digital signal processing to recover the original positioning information broadcast by the satellite. The BeiDou baseband unit 3 is connected to the processor 7 and sends the satellite positioning information to the processor 7 for calculation.

[0026] The CDR receiving antenna 4 is used to receive CDR wireless signals and transmit the CDR wireless signals to the CDR receiving and processing unit; the CDR receiving and processing unit is used to process the CDR wireless signals to obtain broadcast data and transmit the broadcast data to the processor 7.

[0027] Specifically, the CDR receiving and processing unit includes a CDR tuning unit 5 and a CDR baseband unit 6; the CDR receiving antenna 4 is connected to the CDR tuning unit 5, the CDR tuning unit 5 is connected to the CDR baseband unit 6, and the CDR baseband unit 6 is connected to the processor 7.

[0028] The CDR tuning unit 5 is used to tune the CDR wireless signal, and the CDR baseband unit 6 is used to demodulate the tuned signal and transmit the demodulated broadcast data to the processor 7.

[0029] The processor 7 is used to receive the satellite positioning information and the broadcast data, extract differential data from the broadcast data, perform positioning processing on the satellite positioning information to obtain positioning data, and use the differential data to perform error elimination calculation on the positioning data to obtain the calculated positioning data.

[0030] The positioning data obtained by processing the satellite positioning information is achieved using existing satellite positioning algorithms, and this invention does not involve any improvement to the algorithm itself. The processor 7 receives the broadcast data. If the broadcast data is composite data from multiple services, the processor 7 extracts BeiDou ground-based augmentation differential data and performs error elimination calculations with the positioning data. Based on the type of differential data, it calculates the accuracy of RTD (Real Time Differential) and RTK (Real Time Kinematic) data.

[0031] The data stored in the data storage unit 8 includes one or more of the following: baseband demodulation data, demodulated intermediate data, and calculated positioning data.

[0032] The data storage unit 8 can store data in various forms, including but not limited to NOR FLASH, NAND FLASH, DDR2, and DDR3.

[0033] Furthermore, the satellite receiving module may also include an interface unit 9, which is connected to the processor 7. The interface unit 9 is used to output the calculated positioning data. That is, this invention outputs the calculated data to an external device through the interface unit 9.

[0034] The interface unit 9 includes a UART (Universal Asynchronous Receiver / Transmitter) interface and / or a PPS satellite positioning module universal interface, which is compatible with ordinary satellite positioning modules.

[0035] The module of this utility model can be implemented in various forms. For example, the satellite receiving module can be in the form of a standard Mini PCIe structure or a general satellite receiving module structure.

[0036] This invention integrates BeiDou satellite signal receiving technology and CDR signal receiving technology into a single receiving module. Utilizing the CDR channel, it can achieve massive BeiDou high-precision positioning. Furthermore, due to the unidirectional transmission characteristic of CDR, it can effectively avoid security leaks during communication and effectively protect user privacy, thus improving the privacy and security of BeiDou high-precision positioning.

[0037] Furthermore, existing solutions for acquiring differential data via the internet generally require purchasing commercial service accounts, which are costly and require management. Existing solutions for receiving differential data via private wireless networks also suffer from high costs due to the limited number of users. In contrast to these two differential data acquisition methods, the satellite receiving module provided by this invention functions similarly to a regular BeiDou positioning module. Users do not need to understand CDR technology or perform any user-end operations to upgrade massive amounts of single-point BeiDou positioning data to differential BeiDou high-precision positioning. Users also do not need to manage differential data accounts, simplifying user operations, significantly reducing user costs, and enabling the service to a massive number of users.

[0038] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A satellite receiving module, characterized in that, include: Beidou satellite receiving antenna, Beidou receiving and processing unit, CDR receiving antenna, CDR receiving and processing unit, processor and data storage unit; The BeiDou satellite receiving antenna is connected to the BeiDou receiving and processing unit, the CDR receiving antenna is connected to the CDR receiving and processing unit, both the BeiDou receiving and processing unit and the CDR receiving and processing unit are connected to the processor, and the data storage unit is connected to the processor.

2. The satellite receiving module according to claim 1, characterized in that, The BeiDou satellite receiving antenna is used to receive BeiDou satellite wireless signals and transmit the BeiDou satellite wireless signals to the BeiDou receiving and processing unit; the BeiDou receiving and processing unit is used to process the BeiDou satellite wireless signals to obtain satellite positioning information and transmit the satellite positioning information to the processor; the CDR receiving antenna is used to receive CDR wireless signals and transmit the CDR wireless signals to the CDR receiving and processing unit; the CDR receiving and processing unit is used to process the CDR wireless signals to obtain broadcast data and transmit the broadcast data to the processor; The processor is configured to receive the satellite positioning information and the broadcast data, extract differential data from the broadcast data, perform positioning processing on the satellite positioning information to obtain positioning data, and use the differential data to perform error elimination calculation on the positioning data to obtain the calculated positioning data.

3. The satellite receiving module according to claim 2, characterized in that, Also includes: Interface unit; The interface unit is connected to the processor; The interface unit is used to output the calculated positioning data.

4. The satellite receiving module according to claim 2, characterized in that, The BeiDou receiving and processing unit includes a BeiDou satellite tuning unit and a BeiDou baseband unit; the BeiDou satellite receiving antenna is connected to the BeiDou satellite tuning unit, the BeiDou satellite tuning unit is connected to the BeiDou baseband unit, and the BeiDou baseband unit is connected to the processor; The BeiDou satellite tuning unit is used to amplify, down-convert, and perform analog-to-digital conversion on the BeiDou satellite wireless signal to obtain a digital intermediate frequency signal. The BeiDou baseband unit is used to perform baseband demodulation on the digital intermediate frequency signal to obtain satellite positioning information, and then transmit the satellite positioning information to the processor.

5. The satellite receiving module according to claim 2, characterized in that, The CDR receiving and processing unit includes a CDR tuning unit and a CDR baseband unit; the CDR receiving antenna is connected to the CDR tuning unit, the CDR tuning unit is connected to the CDR baseband unit, and the CDR baseband unit is connected to the processor; The CDR tuning unit is used to tune the CDR wireless signal, and the CDR baseband unit is used to demodulate the tuned signal and transmit the demodulated broadcast data to the processor.

6. The satellite receiving module according to claim 1, characterized in that, The data stored in the data storage unit includes one or more of the following: baseband demodulation data, demodulated intermediate data, and calculated positioning data.

7. The satellite receiving module according to claim 1, characterized in that, The data storage unit uses one of NORFLASH, NAND FLASH, DDR2, or DDR3 for data storage.

8. The satellite receiving module according to claim 3, characterized in that, The interface unit includes a UART interface and / or a PPS satellite positioning module universal interface.

9. The satellite receiving module according to claim 1, characterized in that, The satellite receiving module has a Mini PCIe structure.

10. The satellite receiving module according to claim 1, characterized in that, The satellite receiving module has a general structure.

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