GNSS receiver and time determination method thereof

Abstract

The invention relates to a GNSS receiver and a time determination method thereof. The GNSS receiver comprises a cellular communication module and a GNSS module; the cellular communication module is used for receiving a signal frame sent by a base station, generating a trigger signal according to the edge of the signal frame, and parsing the signal frame to determine first time corresponding to theedge of the signal frame; and the GNSS module receives the triggering signal from the cellular communication module through a hardware direct connection and performs calculation according to second time, third time when the triggering signal is received, and fourth time when time information is received, so as to determine the current time of the GNSS receiver, wherein the second time is determined and issued by the cellular communication module according to the first time, the time information is determined and issued by the cellular communication module according to the signal frame, the first time and the second time are based on the local time of the base station, and the third time and the fourth time are based on the local time of the GNSS receiver. With the GNSS receiver and the time determination method thereof provided by the technical schemes of the invention, receiver time can be determined more accurately.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a GNSS receiver and a time determination method thereof. Background technique [0002] With the rapid development and popularization of the Global Navigation Satellite System (GNSS for short, hereinafter referred to as the GNSS system), electronic devices such as mobile phones equipped with GNSS receivers can perform precise positioning conveniently and quickly based on the GNSS system. For example, the GNSS receiver can receive wireless ranging signals transmitted by multiple satellites in the GNSS system to realize its real-time positioning, timing, navigation and other functions. [0003] In order to realize the above functions, the GNSS receiver needs to be able to capture and track the satellite signals of the above system. Existing GNSS receivers can more accurately estimate the visible state of each satellite in the system and its corresponding code phase ...

AI Technical Summary

Problems solved by technology

However, in practical applications, such a solution is difficult to use directly due to the lack of time accuracy provided by the server (usually at the second level), and only a full range of chips can be searched.

[0006] At this stage, in most cases, the existing technology does not provide an effective solution to determine the receiver time more accurately, so as to reduce the error between the receiver time and the satellite time, even when the GNSS receiver is not working, it can still Ensure the accuracy of the calculation of the receiver time, which is conducive to more accurate and faster acquisition of satellites by electronic equipment

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