High-stability clock synthesis device and method based on atomic clock group

Abstract

The invention provides a high-stability clock synthesis device and method based on an atomic clock group. The device comprises a high-stability crystal oscillator, a FPGA module, analog-to-digital conversion (ADC) chips, a digital-to-analog conversion (DAC) chip, a pressure-controlled crystal oscillator and an adder, a plurality of satellite-borne atomic clocks are connected with the FPGA module,the digital-to-analog conversion (DAC) chip, the adder and the pressure-controlled crystal oscillator in sequence through the corresponding analog-to-digital conversion (ADC) chips, the pressure-controlled crystal oscillator outwardly outputs the phase and the frequency as clock signals for next-level navigation task processing and outputs the phase and the frequency to any analog-to-digital conversion (ADC) chip, the high-stability crystal oscillator is used for providing the sampling frequency to the analog-to-digital conversion (ADC) chips and the FPGA module, and sampling clocks of the analog-to-digital conversion (ADC) chips are co-frequency and co-phase. According to the device and method, the problem of non-continuous satellite clock signals caused by switching between different atomic blocks is solved, and a digitalized universal design method based on high-stability clock synthesis within a large dynamic range is proposed.

Description

technical field [0001] The invention relates to a highly stable clock synthesis device and method based on an atomic clock group, and belongs to the technical field of navigation satellite clock generation. Background technique [0002] The management control of the traditional atomic clock group is to use one or more algorithms to calculate the adjustment amount of the system parameters of the atomic clock group after analyzing the clock error data generated by the atomic clock group, and realize the adjustment of the system parameters through the phase microstep meter , so that the accuracy and stability of the atomic time scale produced by the atomic clock group are higher, such as figure 2 shown. [0003] The 10.23MHz signal generation of the satellite clock is an important part of the payload of the satellite navigation system. It is the core of maintaining high-precision time and frequency. It is the on-board time reference for generating navigation signals and distan...

AI Technical Summary

Problems solved by technology

[0008] The technical solution problem of the present invention is: overcome the deficiencies in the prior art, propose a kind of highly stable clock synthesizing device and method based on the atomic clock group, not only to solve the discontinuous problem of the satellite clock signal caused by switching between different atomic clocks; and A digital general-purpose design method is proposed. The digital processing method can satisfy the input of analog signals with a large dynamic range, and realize the synthesis of a high-stable clock with a large dynamic range through software configuration.

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