Multi-system signal detection device based on Beidou satellite and switching method thereof

Abstract

The invention discloses a multi-system signal detection device based on Beidou satellite. The multi-system signal detection device based on the Beidou satellite comprises a radio frequency antenna, a radio frequency signal processing chip, a multi-system signal radio frequency time multiplexing control unit, a multi-system signal baseband processing unit and a multi-system signal continuous measurement master control center, wherein the radio frequency signal processing chip is communicated with the radio frequency antenna; the multi-system signal radio frequency time multiplexing control unit and the multi-system signal baseband processing unit are communicated with the radio frequency signal processing chip; and the multi-system signal continuous measurement master control center is respectively communicated with the multi-system signal radio frequency time multiplexing control unit and the multi-system signal baseband processing unit. According to the invention, the signal reliability of a Beidou navigation terminal under the severe application scenes that a satellite signal is weak, an obstructed object exists between the satellite navigation terminal and a satellite, 2G / 3G mobile communication signals are shielded, and the Beidou navigation terminal has overhigh moving speed is enhanced; the requirement on the Beidou satellite signal is lowered; the self adaption and service capability of the Beidou navigation terminal are improved; the user experience of the Beidou navigation terminal is improved; the positioning precision when the navigation signal is unstable is improved; and the continuity for obtaining geographic position information is improved.

Description

technical field [0001] The invention relates to a multi-standard signal switching device and a switching method capable of improving the continuity of the Beidou-based navigation terminal signal detection and the navigation accuracy, and belongs to the technical field of navigation. Background technique [0002] The main principle of satellite positioning technology is to place a GPS receiver at an undetermined position on the ground, and receive signals transmitted by more than 4 GPS satellites at the same time. The positions of the four or more satellites at this moment and their respective distances to the receiver are determined by a certain method, and the position of the test point and the clock error of the receiver are calculated by using the distance intersection method. [0003] The Beidou Navigation Satellite System (BeiDou Navigation Satellite System) is an independently developed and independently operated global satellite navigation system being implemented in ...

AI Technical Summary

Problems solved by technology

[0004] Beidou satellite navigation system is expected to build a global satellite navigation system consisting of 5 geostationary orbit and 30 non-geostationary orbit satellites by 2020. 16 navigation satellites have been launched, but the full coverage and high-precision navigation and positioning cannot be achieved yet. In addition, because the ground segment of the Beidou navigation system is still under construction, the various navigation and positioning information transmitted and adjusted by the ground station has yet to be improved, resulting in the current The positioning and navigation experience brought by the Beidou navigation terminal to users is not good enough, mainly in the aspects of insufficient coverage, insufficient usability, poor continuity, and insufficient navigation and positioning accuracy.

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