Pulse per second (PPS) generating method and device

Abstract

The invention discloses a pulse per second (PPS) generating method. The method includes the following steps that: satellite observation values are read from a satellite baseband signal processing channel so as to form local UCT time information; information such as satellite time, local time, PPS controller parameters and crystal oscillator parameters is utilized to predict future epoch PPS effective edge time phase difference; and information such as the crystal oscillator parameters and receiver parameters are utilized to determine the current status of a receiver loop, so that a PPS effective edge hopping constraint threshold value can be dynamically adjusted. With the method adopted, the long-term stability of a crystal oscillator can be ensured, and short-term random phase jitter of satellite navigation signals tracked by the receiver can be eliminated, and PPS output accuracy can be improved. The invention also provides a device for realizing the above method. With the device of the invention adopted, the high-precision time information of GNSS can be fully utilized, and timing accuracy of the satellite navigation system can be improved. The pulse per second (PPS) generating method and device of the invention can have higher commercial value.

Description

technical field [0001] The invention relates to the technical field of satellite positioning and timing, in particular to a method and device for generating PPS second pulses based on information such as satellite time and local time, receiver status and crystal oscillator characteristics obtained through positioning and timing calculation. Background technique [0002] In the past few decades, satellite navigation technology has shown extremely high precision in both military and civilian fields, and it has provided precise PVT services for tens of thousands of various equipment in the sea, land and air. With the gradual improvement of GPS, GLONASS, Galileo and Compass, Global Navigation Satellite System (GNSS) is widely used in various industries. In the national defense and national economy such as aerospace, banking and securities systems, and power systems, high-precision synchronous time references are the basic guarantee for their stable operation. In addition, with ...

AI Technical Summary

Problems solved by technology

The problem with this solution is that the crystal oscillator frequency is limited and cannot be increased without limit, and the atomic clock has an expensive price, which is not suitable for promotion.

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