Channel delay test-based satellite clock self-adjusting method

Abstract

The invention discloses a channel delay test-based satellite clock self-adjusting method. The method comprises the following steps of: firstly, performing data packet transmitting / receiving test on a test channel by taking a standard clock source as a clock timer on the ground to obtain a channel transmission standard delay test value; secondly, arranging a clock source to be debugged and the test channel serving as additional devices in a satellite, and sending the clock source to be debugged and the test channel into the space along with the satellite; thirdly, performing the data packet transmitting / receiving test on the test channel to obtain an on-satellite channel delay test value by taking the clock source to be debugged as the clock timer when the satellite runs in space; fourthly, analyzing the ground test result and the space test result tested by the same test channel, and acquiring the timing frequency deviation between the current clock source to be debugged and a ground standard clock source; and finally, determining the timing and frequency difference values which are required to be adjusted according to the frequency difference of the two clock sources and the adjusted time interval, namely compensating the clock source to be debugged to complete the adjustment of a satellite clock.

Description

technical field [0001] The present invention relates to a satellite clock self-adjustment method based on channel delay test, to be more precise, relates to a satellite clock self-adjustment or self-correction method for clock timing deviation caused by clock frequency changes in a satellite communication scenario The clock keeping method belongs to the technical field of satellite clock self-keeping. Background technique [0002] In a wired communication scenario, when data processing such as Time Division Multiplexing (TDM) is implemented, the data transmission device needs to ensure that the clocks of the two devices communicating with each other can be synchronized. However, because the clock crystal oscillators used as clock sources by the communication devices at both ends are different, and are affected by other factors in the external environment of the devices, the clocks between the two devices will be out of sync. Because the crystal oscillator device of the cloc...

AI Technical Summary

Problems solved by technology

However, these methods are expensive, and the corresponding technology is limited by the accessibility of communication transmission

Furthermore, if the clock calibration technology is simply used, the clock timing synchronization of the communication equipment cannot be guaranteed during the intermittent time of clock calibration.

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