Circuit structure method for upgrading baseband circuit functions in GNSS receiver

Abstract

The invention relates to a circuit structure for upgrading baseband circuit functions in a global navigational satellite system (GNSS) receiver, which comprises a programmable logic circuit module, a central processing module, a storage function module and a data exchange interface module, wherein the programmable logic circuit module is connected with a radio-frequency circuit in the GNSS receiver; and the central processing module is respectively connected with the programmable logic circuit module, the storage function module and the data exchange interface module. The invention also relates to a method for upgrading the baseband circuit functions in a GNSS receiver on the basis of the circuit structure. The circuit structure and the method can track different signals according to different resource files to be upgraded and process data with different methods, thereby enhancing the flexibility of the GNSS receiver. The invention is of great importance for the uncertainty of GNSS signals within a long time period; and a user can configure the circuit structure into GNSS receivers with corresponding characteristics according to different application occasions. The method has the advantages of simple and practical structure, quick and convenient process, stable and reliable working performance, and wide application range.

Description

Technical field [0001] The present invention relates to the field of Global Navigation Satellite System (GNSS, Global Navigation Satellite System), in particular to the technical field of functional upgrading of baseband circuits in global navigation satellite system receivers, and specifically refers to a circuit that realizes functional upgrading of baseband circuits in GNSS receivers Structure and method. Background technique [0002] GNSS is a broad concept, it is the general term for all satellite navigation and positioning systems, including the current GPS satellite global positioning system, GLONASS global navigation satellite system, Beidou satellite navigation system, WAAS wide area augmentation system, EGNOS European static satellite navigation overlap System, DORIS satellite-borne Doppler radio orbit determination and positioning system, PRARE precise distance and variability measurement system, QZSS quasi-zenith satellite system, GAGAN GPS geostationary satellite aug...

AI Technical Summary

Problems solved by technology

Obviously, most of these operations are impossible for users to complete by themselves, and they need to return to the receiver manufacturer for the receiver manufacturer to complete the above work, which is very inconvenient

Although in the circuit design of other industries or applications, there is also a solution to modify and upgrade the FPGA configuration file in the non-volatile storage through the CPU, but for the GNSS receiver, there is currently no way to adapt to future signals or different Application-specific upgrade solutions

[0008] Therefore, although the GNSS receiver whose baseband part is implemented by an ASIC chip can also be upgraded, because its baseband part is implemented by an ASIC chip, once the GNSS receiver is made, the function of the baseband part cannot be changed, and the scope of the upgrade is limited to GNSS receivers. In other words, the upgrade of traditional receivers can only modify the method of data processing software, but it is completely powerless for the signal objects to be processed by GNSS receivers; the baseband part is implemented by FPGA, but the configuration file uses The GNSS receiver that is solidified in the non-volatile memory and directly reads the configuration file in the non-volatile memory by the FPGA, although the baseband part can be upgraded in theory, but the upgrade needs to disassemble the GNSS receiver and replace the non-volatile receiver. Memory or re-programming with a dedicated programmer, which is very inconvenient in actual use

[0009] In the past few decades of GNSS applications, the available GNSS resources have not changed much, so the application of traditional GNSS receivers has not been limited; however, in the face of so many GNSS resources that may appear in the future and the uncertainty of these resources The traditional GNSS receiver will lack flexibility and adaptability, and its application will be limited

Faced with this situation, GNSS receiver manufacturers will have to spend a lot of manpower and material resources to continuously develop a wide variety of GNSS receiver types; on the other hand, GNSS receiver users will also have a lot of concerns, because the purchased GNSS receiver It is very likely that after new changes in GNSS signals, these new functions and services cannot be enjoyed, and even the GNSS receiver becomes a waste due to the disappearance of some GNSS resources

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