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

Improved binary-coded character modulation method of satellite navigation system signals

A satellite navigation system and binary coding technology, applied in the field of satellite navigation systems, can solve the problems of signal code tracking, unsatisfactory anti-multipath and anti-jamming compatibility, and reduced power amplifier efficiency.

Inactive Publication Date: 2011-04-27
SHANGHAI JIAO TONG UNIV
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Binary-coded symbol modulation is used to improve signal performance by modulating the signal power onto the side lobes of the carrier frequency, but the binary-coded symbol modulation method given in the article will bring out-of-band large-amplitude side lobes to reduce the efficiency of the power amplifier, and the signal The code tracking, anti-multipath, anti-jamming and compatibility with other navigation signals are not ideal in some cases

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
  • Improved binary-coded character modulation method of satellite navigation system signals
  • Improved binary-coded character modulation method of satellite navigation system signals
  • Improved binary-coded character modulation method of satellite navigation system signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0028] Such as figure 2 As shown, in this embodiment, firstly, according to the performance requirements and constraints of the navigation system, the frequency f of the spreading code is determined c =1.023MHz, determine the number K=4 that needs to split the unit, select symbol [s 0 ,s 1 ,...,s K-1 ]=[-1,1,1,1]; then according to the determined spreading code frequency f c Determine the modulation waveform of the spread spectrum symbol, and construct the improved binary coded symbol modulation M-BCS ([-1, 1, 1, 1], 1), the specific steps are as follows:

[0029] Step 1: First, according to the requirements ...

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 an improved binary-coded character modulation method of satellite navigation system signals, belonging to the technical field of satellite navigation. On the basis of binary-coded characters, the traditional spread spectrum character is split into K units; each unit uses the character pulse waveform based on MSK (minimum shift keying) instead of the binary value waveform; and proper parameters are selected, thereby having the advantages of interference rejection, multipath resistance and compatibility of the binary-coded character, realizing the constant enveloping of MSK modulation, enhancing the efficiency of the power amplifier, realizing large side lobe attenuation and the like. The invention uses the improved binary-coded character modulation to enhance the code tracking performance, multipath resistance, interference rejection and compatibility with other navigation signals, thereby realizing constant enveloping of signals and avoiding the occurrence of large-amplitude side lobes.

Description

technical field [0001] The invention relates to a method in the technical field of satellite navigation systems, in particular to an improved binary code symbol modulation method for satellite navigation system signals. Background technique [0002] The quality of the signal system performance of the satellite navigation system directly determines the navigation and positioning performance of the system, and the navigation signal modulation is one of the keys in the design of the navigation signal system. Binary Coded Symbol (BCS for short) is a new navigation signal modulation method, C.J.Hegarty, J.W.Betz, A.Saidi wrote "Binary Coded Symbol Modulations for GNSS". Proceedings of ION NTM 2005, San Diego, USA, pp.56-64, January2005. "Global satellite navigation system binary code symbol modulation", by selecting appropriate parameters to improve signal related performance, such as anti-jamming and anti-multipath capabilities of navigation systems, especially in the current ra...

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): G01S19/37G01S19/21
Inventor 战兴群刘卫翟传润杜刚刘莉牛满仓张炎华
Owner SHANGHAI JIAO TONG UNIV
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