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Triones navigation system radio frequency front end

A navigation system, radio frequency front-end technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, beacon systems using radio waves, etc. The effect of small size, small delay and low cost

Inactive Publication Date: 2006-09-06
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

Experimental program
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Effect test

Embodiment Construction

[0016] The accompanying drawings disclose a system block diagram of the present invention and an electrical schematic diagram of a specific embodiment without limitation, and the present invention will be further described below in conjunction with the accompanying drawings.

[0017] Depend on 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 passes through the low-noise amplifier, the image rejection filter, and the gain module in sequence, and then is sent to the down-converter to be converted into an intermediate frequency signal, and then sent to the variable gain amplifier after passing through the intermediate frequency amplification and the LC band-pass filter. Finally, the intermediate frequency signal is output by the operational amplifier...

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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 field of satellite navigation, in particular to a radio frequency front end of a Beidou satellite navigation system. Background technique [0002] The Beidou navigation satellite positioning system is currently composed 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 geographical location of the user's location, and provide navigation information to the user and the competent authority. [0004] b. Communication: Two-way short digital message communication can be realized between users and users, and between users and the central control system. [0005] c. Timing: The central control system regularly broadcasts timing information to provide time delay correction values ​​for timing users. [0006] The frequency band registered by the Beidou n...

Claims

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Application Information

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