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Triones navigation system radio frequency front end

A navigation system and radio frequency front-end technology, applied in radio wave measurement system, satellite radio beacon positioning system, radio wave beacon system, etc., can solve the problems of large volume, large delay, high cost of radio frequency front end, etc., to achieve The effect of small size, small delay and low cost

Inactive Publication Date: 2009-06-03
南京东大宽带通信技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The RF front-end has problems such as high cost, large volume, and large delay

Method used

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  • Triones navigation system radio frequency front end
  • Triones navigation system radio frequency front end
  • Triones navigation system radio frequency front end

Examples

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Embodiment Construction

[0016] The accompanying drawings non-limitingly disclose the system block diagram of the present invention and the electrical principle diagram of a specific embodiment. The present invention will be further described below with reference to the accompanying drawings.

[0017] by figure 1 It can be seen that the active antenna module receives and amplifies the weak satellite signal, transmits it to the radio frequency receiving module through the cable, and finally processes it by the baseband part. The satellite signal received by the active antenna module is sent to the down-converter to be converted into an intermediate frequency signal after passing through the low noise amplifier, image rejection filter, and gain module in turn, and then sent to the variable gain amplifier after intermediate frequency amplification and LC bandpass filter. Finally, the intermediate frequency signal is output by the operational amplifier.

[0018] by figure 2 It can be seen that, in this embo...

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Abstract

The invention comprises an active antenna module, and a RF receive module. Wherein, it sends the received signal to the down converter through a low-noise amplifier, a mirror suppression filter, and a gain module to convert into a MF signal; then, after MF amplification and LC bandpass filer, it sends the signal to a variable gain amplifier, and finally outputs a MF signal by OA. This invention has small volume and NF, low cost, and flexible control.

Description

Technical field [0001] The invention relates to a radio frequency front end in the satellite navigation field, in particular to the radio frequency front end of the Beidou satellite navigation system. Background technique [0002] The Beidou navigation satellite positioning system currently consists of three parts: a geosynchronous satellite positioned over the equator, a ground center station, and a user terminal. The main functions of the system are: [0003] a. Timing: Quickly determine the geographic location where the user is located, and provide navigation information to the user and the competent authority. [0004] b. Communication: Two-way short digital message communication can be achieved between users and users, and between users and the central control system. [0005] c. Timing: The central control system broadcasts timing information regularly to provide timing users with time delay correction values. [0006] The frequency band registered by the Beidou navigation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/13G01S19/21G01S1/02G01S1/04G01S5/02
Inventor 严蘋蘋刘进蒯振起
Owner 南京东大宽带通信技术有限公司
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