A highly stable clock synthesis device and method based on an atomic clock group

Abstract

A highly stable clock synthesis device and method based on an atomic clock group, comprising: a highly stable crystal oscillator, an FPGA module, an analog-to-digital conversion chip ADC, a digital-to-analog conversion chip DAC, a voltage-controlled crystal oscillator, and an adder. Multiple on-board atomic clocks are sequentially connected to the FPGA module, digital-to-analog conversion chip DAC, adder, and voltage-controlled crystal oscillator through the corresponding analog-to-digital conversion chip ADC; the voltage-controlled crystal oscillator outputs phase and frequency to the outside as a next-level navigation The clock signal for task processing, and output phase and frequency to any analog-to-digital conversion chip ADC; the high-stable crystal oscillator is used to provide sampling frequency to the analog-to-digital conversion chip ADC and FPGA module, and the sampling clocks of multiple analog-to-digital conversion chips ADC are at the same frequency in phase. The invention not only solves the problem of "discontinuity" of satellite clock signals caused by switching between different atomic clocks, but also proposes a digital universal design method based on high-stable clock synthesis in a large dynamic range.

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.

Images