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 ...

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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 co

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