Anti-4G (fourth generation)-interference Beidou GPS (global positioning system) multi-mode receiving-dispatching integration navigation communication module

Abstract

The invention discloses an anti-4G (fourth generation)-interference Beidou GPS (global positioning system) multi-mode receiving-dispatching integration navigation communication module, which comprises a Beidou first-generation RDSS (radio determination satellite service) unit, a Beidou second-generation RNSS (radio navigation satellite service) / GPS unit, a power supply processing unit, a connector and a metal box body, wherein the Beidou first-generation RDSS unit and the Beidou second-generation RNSS / GPS unit are both loaded on a PCB (printed circuit board); the power supply processing unit supplies power to the Beidou first-generation RDSS unit and the Beidou second-generation RNSS / GPS unit; a receiving-dispatching processing channel adopts an anti-4G-intererence receiving-dispatching circuit and comprises a low-noise amplifier (LNA), a first-level frequency Mixer1, a first low pass filter (LPF), a second-level frequency Mixer2, a band-pass filter (BPF), a variable gain amplifier (VGA) and a second LPF, wherein all components are successively connected; the signal output end of the second LPF is connected with a baseband processing module; a radio frequency signal IF1OUT output from the first-level frequency mixer1 is input into a first intermediate frequency surface acoustic wave filter IF1SAW; the IF1SAW outputs a frequency radio signal IF1IN to the input end of the first LPF. According to the module, the problem of receiving interference on the Beidou first-generation RDSS by a 4G signal is solved.

Description

technical field [0001] The invention relates to a Beidou GPS multi-mode transceiver integrated navigation communication module, which belongs to the technical field of radio frequency communication devices. Background technique [0002] The Beidou Navigation System (RDSS) is an all-weather, regional satellite positioning system that uses geosynchronous satellites to provide users with fast positioning, short digital message communication and timing services. However, the Beidou first-generation RDSS positioning system has certain defects, that is, it adopts an active positioning method, so that the user machine cannot independently calculate its own coordinate values, and the user capacity is limited, the positioning accuracy is not high, and the user's target position is easily exposed. [0003] The Beidou second-generation satellite navigation system adopts a passive three-dimensional positioning principle similar to that of the GPS system in terms of navigation principles...

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Problems solved by technology

[0010] The purpose of the present invention is to design a Beidou GPS multi-mode transceiver integrated navigation communication module integrating Beidou first-generation RDSS, Beidou second-generation RNSS and GPS, low power consumption, and small volume, so as to solve the shortage of single-mode navigation and positioning modules, and Solve the interference problem of 4G signal to the first-generation RDSS terminal

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