Radio frequency front-end circuit of L1-L2 dual-band satellite navigation receiver

A satellite navigation and radio frequency front-end technology, applied in satellite radio beacon positioning systems, electrical components, radio wave measurement systems, etc., can solve the problems of complex circuit structure, large power consumption, and high cost

Active Publication Date: 2016-05-04
ALLYSTAR TECH SHENZHEN CO LTD
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to realize the function of not using off-chip radio frequency, intermediate frequency filter and supporting single antenna input on the ba

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Radio frequency front-end circuit of L1-L2 dual-band satellite navigation receiver
  • Radio frequency front-end circuit of L1-L2 dual-band satellite navigation receiver
  • Radio frequency front-end circuit of L1-L2 dual-band satellite navigation receiver

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0048] A kind of preferred embodiment of the present invention is as follows:

[0049] Such as figure 2 As shown, the dual-band receiver RF front-end circuit consists of the following parts:

[0050] (1) radio frequency low noise amplifier 10, its input is to receive radio frequency signal, output radio frequency signal A after amplifying, connect first stage mixer 20;

[0051] (2) first stage mixer 20, its input radio frequency signal A, carries out frequency mixing with the first local oscillator signal LO1_I of channel one I road and the first local oscillator signal LO1_Q of two channel Q roads respectively, signal A is by radio frequency Down conversion to the first intermediate frequency frequency, that is: A and LO1_I mixing output I first intermediate frequency signal B1, A and LO1_Q mixing output Q first intermediate frequency signal B2, B1 and B2 are connected to the second stage mixer 30;

[0052] (3) second stage mixer 30, its input is the first intermediate fre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Disclosed in the invention is a radio frequency front-end circuit of an L1-L2 dual-band satellite navigation receiver. The radio frequency front-end circuit is composed of a radio frequency low-noise amplifier, a first-stage mixer, a second-stage mixer, a low-pass filter, a configurable complex band-pass filter, a variable-gain intermediate-frequency amplifier, an analog-digital converter, a frequency synthesizer and an eight-frequency divider. The circuit is capable of receiving dual-band satellite signals like GPS L1 and L2 signals, Beidou B1 and B2 signals, Glonass L1 and L2 signals; and demands of high-precision dual-band satellite positioning and navigation can be satisfied. Meanwhile, the circuit is characterized in that the circuit structure of the traditional dual-band receiver is simplified and simultaneous receiving of dual-band signals can be realized only by using one frequency synthesizer; single-antenna inputting is supported and image rejection by using an off-chip radio frequency unit and an intermediate-frequency filter is not needed, so that the power consumption and cost of the receiver radio frequency front-end circuit can be effectively reduced. Therefore, the provided circuit has the great industrial value in use.

Description

technical field [0001] The invention belongs to the field of wireless communication chip design, and in particular relates to a radio frequency front-end circuit of a satellite navigation receiver. Background technique [0002] The global satellite navigation system (GNSS) can provide users with accurate position, speed, and time information. It has the characteristics of all-weather, global, real-time, and high-precision, so it has developed rapidly in recent years. At present, global satellite navigation systems mainly include the Global Positioning System (GPS) of the United States, the Glonass system (Glonass) of Russia, the Galileo system (Galileo) of the European Union and the Beidou System (BDS) of China. The satellites of each system can transmit satellite signals of multiple carrier frequencies to the ground at the same time. Added satellite signals in the L5 (1176.45MHz) frequency band; Glonass satellites simultaneously transmit L1 (1602MHz) and L2 (1246MHz) two-f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01S19/24H04B1/10H04B1/26
Inventor 孙旭光
Owner ALLYSTAR TECH SHENZHEN CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap