Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An Accurate Calculation Method of Correlation Domain Parameters Applicable to Navigation Signal Quality Evaluation

A navigation signal and quality assessment technology, applied in the field of satellite navigation signal quality assessment, can solve the problems of not paying attention to the solution steps, incomplete index parameters, etc.

Active Publication Date: 2020-04-10
XIAN INSTITUE OF SPACE RADIO TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core of the protection of the above patents is the comprehensiveness of the signal quality evaluation indicators, and does not pay attention to the specific calculation steps for specific indicator parameters. For the relevant domain parameters, the involved indicator parameters are incomplete

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
  • An Accurate Calculation Method of Correlation Domain Parameters Applicable to Navigation Signal Quality Evaluation
  • An Accurate Calculation Method of Correlation Domain Parameters Applicable to Navigation Signal Quality Evaluation
  • An Accurate Calculation Method of Correlation Domain Parameters Applicable to Navigation Signal Quality Evaluation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0127] In order to make the object, technical solution and advantages of the present invention clearer, the following reference figure 1 , to further describe the present invention in detail.

[0128] For convenience of illustration, consider a simple example: there are K=4 signal components, each signal component is a BPSK (10) signal, and the pseudo code period T p =1ms, the emission bandwidth is 30.69MHz, and the analysis bandwidth is 20.46MHz.

[0129] The operating steps of the method disclosed by the invention are as follows:

[0130] 1), data collection

[0131] Use high-speed acquisition equipment to collect navigation signals from the same source, set the sampling rate to 650MHz, and collect data for 2s.

[0132] 2), signal synchronization

[0133] Coarse code / carrier phase synchronization: follow the attached figure 2 As shown in the rough synchronization process, 1ms data is taken, down-converted to baseband, 30.69MHz ideal low-pass filtering, power normalizat...

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 discloses an accurate relevant domain parameter calculation method for navigation signal quality evaluation. The method comprises: step one, carrying out clock homologous sampling on anactual navigation signal; step two, calculating accurate fine code phases and accurate fine carrier phases of K signal components of actual navigation signal sampling data within M pseudo-code cycles;step three, calculating correlation functions of all K signal components of the actual navigation signal and K signal components of a local navigation signal within M pseudo-code cycles; and step four, according to maximum correlation values and correlation functions of all K signal components of the actual navigation signal and ideal navigation signal sampling data and K signal components of thelocal navigation signal within the M pseudo-code cycles, calculating related losses of the K signal components of the actual navigation signal sampling data, related losses of an actual navigation-signal combination signal, and S curve offsets and S curve slope offsets of all K signal components. The method has advantages of high computational efficiency and high accuracy.

Description

technical field [0001] The invention relates to a method for calculating parameters in a correlation domain of a navigation signal. The invention belongs to the field of satellite navigation signal quality evaluation. Background technique [0002] Satellite navigation signals are user-oriented space interfaces, and their signal quality directly affects whether the system can achieve the designed performance. At the same time, signal quality is also the core standard for measuring the payload level of navigation satellites, and has received continuous attention from relevant units. [0003] The parameters of navigation signal quality evaluation include time domain, frequency domain, modulation domain, correlation domain and measurement domain. Among them, the correlation domain parameter is closely related to the receiving performance of the signal received by the user, and can directly reflect the quality of the navigation signal. Correlation domain parameters include corr...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/20
Inventor 严涛王瑛刘潇曲博王国永雷文英
Owner XIAN INSTITUE OF SPACE RADIO TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com