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Beidou 2nd generation B1 and B3 double-frequency receiver

A receiver and Beidou technology, applied in the field of satellite navigation, to achieve complete processing and separation, improve positioning accuracy, and improve reliability

Active Publication Date: 2016-05-25
BEIJING MXTRONICS CORP +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the current Beidou navigation receivers can only receive signals at a single B1 frequency point. Therefore, in the civilian field, it is very urgent to realize a navigation receiver that can simultaneously support Beidou 2nd generation B1 and B3 frequency points.

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  • Beidou 2nd generation B1 and B3 double-frequency receiver

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Embodiment Construction

[0033] Aiming at the high precision, stability and miniaturization requirements of civil navigation and positioning, the present invention designs a civil Beidou second-generation B1 and B3 dual-frequency receiver in combination with the capabilities and characteristics of the Beidou navigation system. By receiving and processing the signals of Beidou II B1 and B3 civil frequency points, and adopting differential positioning, the purpose of fast and high-precision navigation and positioning is realized.

[0034] 1. System design

[0035] like figure 1As shown, it is the civil Beidou second generation B1, B3 dual-frequency receiver of the present invention, including a signal combiner, a radio frequency amplification and filtering circuit, a radio frequency down-conversion and analog-to-digital conversion sampling conversion circuit, an intermediate frequency digital signal processing circuit, and a measurement data pre-processing circuit. Processing module, navigation and pos...

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Abstract

The invention relates to a Beidou 2nd generation B1 and B3 double-frequency receiver, the receiver comprises an amplifying and filtering circuit, a power dividing circuit, a B1 narrow-band band-pass filter, a B3 narrow-band band-pass filter, a down-conversion and analog-digital conversion sampling circuit, a crystal oscillator, an intermediate frequency (IF) digital signal processing circuit, a measured data preprocessing module, a combined filtering module and a navigation and positioning module. According to the invention, the civilian used Beidou 2nd generation B1, B3 double-frequency signal double-end selectable input is adopted by the receiver, the B1, B3 double-frequency signal can be simultaneously demodulated and performed positioning calculation, a self-adaptive difference positioning algorithm is adopted, the dependency of GPS system is avoided, the navigation and positioning precision of Beidou system is effectively improved, and a reliable positioning continuity and a relatively high positioning precision are provided under conditions of poor observation condition and less available satellite number.

Description

technical field [0001] The invention belongs to the field of satellite navigation and relates to a Beidou satellite navigation receiver. Background technique [0002] The Beidou satellite navigation and positioning system is a new, all-weather, regional satellite navigation and positioning system developed by my country to provide users with fast positioning, short digital message communication and timing services. The Beidou satellite navigation system is a huge system engineering with complex technology and wide application range. It has filled the gaps in my country's navigation system and opened a new journey for my country's aerospace industry. , Provide an important guarantee to promote the overall development of economy and culture. The Beidou second-generation satellite positioning system adopts a passive positioning method, and the multi-frequency data sent by it can perform high-precision relative positioning, which is of great practical significance to my country'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/13
CPCG01S19/13
Inventor 李文杰赵元富陈雷韩逸飞
Owner BEIJING MXTRONICS CORP
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