Method for constructing fully-digital GNSS compatible navigation receiver

A technology of a navigation receiver and a construction method, which is applied to satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of difficult implementation, complex functions and structures, and achieves elimination of potential interference, good scalability, and reduction of The effect of device occupancy

Inactive Publication Date: 2010-09-15
BEIHANG UNIV
View PDF2 Cites 50 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

University of Electronic Science and Technology of China's research mainly uses radio frequency direct sampling in wireless communication broadband d

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
  • Method for constructing fully-digital GNSS compatible navigation receiver
  • Method for constructing fully-digital GNSS compatible navigation receiver
  • Method for constructing fully-digital GNSS compatible navigation receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The overall block diagram of the present invention is as figure 1 shown. The satellite signal is first received by a broadband antenna (3db bandwidth 1.15-1.65GHz), and then amplified by a three-stage low-noise amplifier (LNA). After the first-stage LNA, it passes through a broadband pre-filter with a bandwidth range of about 1.2-1.5GHz. Large broadband; after the last level of LNA, followed by a splitter, divided into two channels, each passing through a bandpass filter, filtering out the navigation frequency band signal with a bandwidth of 136MHz near 1.2G and the navigation signal with a bandwidth of 51MHz near 1.5GHz; filter After being combined by a combiner, the combined frequency band is as follows: figure 2 The signal is then controlled by the AGC and then sampled by the A / D chip with a sampling rate up to 1GHz, and the A / D outputs two signals at half the sampling clock rate; Sampling rate and multi-frequency point signal separation; FPGA output contains data...

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

The invention relates to a method for constructing a fully-digital GNSS compatible navigation receiver, which comprises four steps: I, constructing a receiving link in accordance with actual needs by taking the characteristics of satellite signals, performance indexes and current device level into comprehensive consideration; II, choosing a proper A/D chip and a proper time clock source to complete direct radio frequency sampling and constructing a sampling rate in accordance with bandwidth sampling requirements; III, constructing a filter decimation network to reduce the sampling rate, completing the down-conversion of the radio frequency, converting the frequency of the bandwidth satellite navigation signals near 1.2G and 1.5G two frequency points down to a low medium frequency under a condition of a high sampling rate, and finally outputting a sampling time clock and a GNSS medium frequency signal; and IV, constructing digital radio frequency front end and rear end medium frequencyreceiver interfaces for making the receiver compatible with other medium frequency receiver. The thought of using software radio realizes the collective receiving of full-range GNSS satellite navigation signals; and the medium frequency receivers can complete navigation solution and output measurement values, so multi-system and multi-frequency point compatible navigation is realized. The method has an application and development prospect in the technical field of communication.

Description

(1) Technical field: [0001] The invention relates to a construction method of an all-digital GNSS compatible navigation receiver, which is related to the research direction of global satellite navigation system, satellite navigation receiver and software radio, and belongs to the technical field of communication. (two) background technology: [0002] In recent years, the construction of GNSS satellite navigation system has made great progress, and the demand for low-cost, high-performance, flexible and easy-to-use GNSS compatible receivers has greatly increased in various fields. Generally, navigation receivers adopt an analog multi-stage down-conversion structure, and digitization and signal processing are performed after down-conversion to intermediate frequency. This signal receiving method has poor flexibility and is easy to introduce errors. The GNSS receiver based on the idea of ​​software radio does not need to re-replace equipment for signal structure and system upgr...

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): G01S19/13
Inventor 常青于渊陈媛刘永强
Owner BEIHANG UNIV
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