Navigation constellation inter-satellite link transceiver device time delay calibration method

Abstract

The invention provides a navigation constellation inter-satellite link transceiver device time delay calibration method. The method comprises the steps of adding a bidirectional calibration channel, a medium-frequency switch matrix and a radio-frequency switch matrix on a transceiver device, conducting time-sharing control on the radio-frequency switch matrix and the medium-frequency switch matrix, sequentially enabling every two of a transmitting channel, a receiving channel and the bidirectional calibration channel to be communicated, performing closed loop time delay testing to obtain three time delay values, and finally calculating an absolute time delay Tt of the transmitting channel and an absolute time delay Tr of the receiving channel according to the three time delay values, wherein the time delay amount serves as a transceiver device time delay zero value to be substituted into inter-satellite link time delay measurement data for time delay calibration, and transceiver device time delay calibration is achieved. By means of the navigation constellation inter-satellite link transceiver device time delay calibration method, on-orbit real-time measurement of a transceiver can be achieved, and transceiver device delay calibration can be completed in a single satellite, namely the defect of static testing is avoided. In addition, compared with other dynamic methods, multi-satellite or multi-antenna participated time delay measurement work is not needed.

Description

technical field [0001] The invention relates to a time delay calibration method, in particular to a time delay calibration method for navigation constellation inter-satellite link transceiver equipment. Background technique [0002] Navigation constellation autonomous navigation refers to the fact that the navigation constellation satellites continuously correct the satellite long-term forecast ephemeris injected by the ground station through inter-satellite two-way ranging, data exchange and on-board processor filtering processing when the navigation constellation satellites are not supported by the ground system for a long time and clock parameters, and independently generate navigation messages and maintain the basic configuration of the constellation to meet the user's high-precision navigation and positioning application requirements. The realization of inter-satellite precision ranging and time synchronization is one of the key technologies that determine the ultimate ...

AI Technical Summary

Problems solved by technology

[0006] When the transceiver is working in orbit, the working state of each device will change with external factors such as time, temperature, vibration, and radiation dose, so the absolute time of the transceiver’s transmitting channel and receiving channel under different external environments The delay values ​​are inconsistent. The traditional static measurement method has gradually failed to meet the needs of real-time and online accurate measurement of equipment delay, and cannot accurately characterize the real-time delay value of each device in the satellite operating state, while the dynamic method can meet this requirement. Application requirements

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