Positioning method and device thereof

Abstract

The invention relates to the field of communication and discloses a positioning method and a device of the positioning method. The method comprises the following steps that signals from all satellites are captured to obtain capturing signals; the capturing signals are tracked to obtain tracking signals; signal quality parameters of all the tracking signals are calculated, and the tracking signals with the signal quality parameters meeting the quality judgment condition in all the tracking signals are determined as high quality signals, wherein the signal quality parameters at least comprise a Doppler error and/or a carrier-to-noise ratio; at least four high quality signals are selected to carry out PVT calculation to obtain positioning information and timing information. Signal quality judgment is carried out on all tracked satellites, the high quality signals are selected from the signals to carry out a subsequent resolving procedure, the quality of the signals involved in resolving is improved, and the positioning accuracy of the positioning method and the device in an implementation mode is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to positioning technology. Background technique [0002] The working principle of the positioning system, whether it is GPS positioning, GLONASS positioning, Beidou positioning or Galileo positioning, is that the main control station on the ground collects the observation data and meteorological information of each monitoring station, and calculates the ephemeris of each satellite. Watches and satellite clock corrections, edit the navigation message according to the specified format, and inject these information into the satellite through the injection station on the ground. When measuring and positioning, the user can use the receiver's stored ephemeris to obtain the rough position of each satellite. According to these data and its own position, the computer selects four satellites with larger opening angles between the satellite and the user line as observation objects. During observat...

AI Technical Summary

Problems solved by technology

[0012] In the prior art, the tracked satellite observations are usually calculated directly to obtain position information. However, due to the constantly changing environment of aerial observations, the satellite signals are very weak when they propagate to the ground, or are affected by multipath, Due to the influence of cross-correlation, the quality of satellite signals is unstable, the receiver cannot track normally during the tracking phase, or the error of tracking data is large, which will cause large deviations in positioning results and affect the quality of positioning

Images