Navigation satellite signal generator and implementation method

Abstract

The invention relates to a navigation satellite signal generator and an implementation method. The navigation satellite signal generator comprises a controller, a USBHUB, a navigation receiver, a receiving antenna, a disciplined clock module, a radio frequency module, an emitting antenna and a base band module. State self-checking is carried out on all the modules. The navigation receiver transmits information to the controller and the disciplined clock module. The disciplined clock module carries out local time service, outputs time frequency signals and transmits the time frequency signals to the radio frequency module. The controller carries out signal parameter configuration and outputs moment configuration according to ephemeris information. Pseudo-range information, Doppler information, ionosphere information, troposphere information and error information are calculated. The base band module generates intermediate-frequency signals. Base band signals are modulated through the radio frequency module, and finally radio frequency signals of multiple frequency points are synthesized into navigation satellite radio frequency signals. By means of the navigation satellite signal generator and the implementation method, navigation signals based on the real-time ephemeris can be generated and can be normal satellite signals or pesudolite signals. The navigation satellite signal generator and the implementation method can be widely used in universal receivers and can be combined with satellites in orbits for positioning.

Description

technical field [0001] The invention relates to a location service, satellite navigation and Internet of Things application fields, in particular to a navigation satellite signal generator based on a USB3.0 bus structure and an implementation method. Background technique [0002] Navigation satellite signal generation is to provide high-reliability, high-precision, repeatable test signals and test methods for location-based services, satellite navigation and Internet of Things application terminals. At present, most satellite navigation signals are generated by theoretical calculation based on ephemeris files, which lacks the means of synchronizing with the actual satellite time. At the same time, most of the buses used by satellite navigation signal generation equipment are Ethernet connections, which have a certain impact on the real-time performance and stability of the equipment. [0003] USB 3.0 is the latest USB specification. While maintaining compatibility with USB ...

AI Technical Summary

Problems solved by technology

At present, most satellite navigation signals are generated by theoretical calculation based on ephemeris files, which lacks the means of synchronizing with the actual satellite time

At the same time, most of the buses used by satellite navigation signal generation equipment are Ethernet connections, which have a certain impact on the real-time performance and stability of the equipment.

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