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

An Unambiguous Reception Method Applied to boc(n,n) Signals

A receiving method and non-ambiguous technology, applied in the field of satellite navigation, can solve problems such as tracking ambiguity, and achieve the effect of excellent tracking performance

Active Publication Date: 2017-09-01
湖南中电星河电子有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention designs a new reference waveform, the pseudo-code phase discrimination function constructed by the waveform has no wrong lock point, and can effectively solve the problem of tracking ambiguity when the code-related reference waveform technology is applied to BOC(n,n) signals

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 Unambiguous Reception Method Applied to boc(n,n) Signals
  • An Unambiguous Reception Method Applied to boc(n,n) Signals
  • An Unambiguous Reception Method Applied to boc(n,n) Signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but this does not constitute a limitation of the present invention.

[0031] Such as Figure 1 to Figure 6 As shown, the method for receiving an unambiguous reference waveform applied to a BOC(n,n) signal in this embodiment includes the following steps:

[0032] Step S1: Phase rotate and split the received satellite navigation signal to obtain two orthogonal signals respectively z i ( t )and z q ( t );

[0033] Step S2: The local replica signal generator generates a local BOC signal according to the pseudo-code phase information obtained by the pseudo-code phase detector X ( t ), X ( t ) respectively with z i ( t )and z q ( t ) correlation, accumulation, get I P and Q P , the calculation formula is

[0034]

[0035]

[0036] The value of T is generally selected as 1ms;

[0037] The local reference waveform generation ...

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 unambiguous anti-multipath receiving method for BOC (n, n) signals, comprising the following steps: a received satellite navigation signal is phase-rotated and split to obtain zi(t) and zq(t); a spread spectrum code and a subcarrier are generated according to pseudo-code phase information, and the spread spectrum code and the subcarrier are modulated to obtain X(t), and X(t) is correlated with and added up to zi(t) and zq(t) respectively to obtain Ip and Qp; a reference waveform signal W(t) is generated according to the pseudo-code phase information, wherein the basic waveform signal of W(t) is composed of four basic rectangular waves of which the widths are delta1, the amplitudes of the four basic rectangular waves are respectively 1, 1, 1 and -1, and an interval of which the width is delta2 exists between the first two basic rectangular waves; W(t) is correlated with and added up to zi(t) and zq(t) respectively to obtain Iw and Qw; S3, a pseudo-code phase discrimination function is obtained through a formula d(epsilon)=Ip(epsilon)*Iw(epsilon)+Qp(epsilon)*Qw(epsilon) according to Ip, Qp, Iw and Qw obtained in S2; and S4, the steps S2 to S3 are repeated to realize BOC (n, n) signal pseudo code tracking. By adopting the method of the invention, error locking points of the pseudo-code phase discrimination function can be eliminated effectively.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to an unambiguous receiving method applied to BOC (n, n) signals. Background technique [0002] Multipath is caused by the satellite direct signal entering the receiver antenna through the reflection of surrounding objects. It is difficult to eliminate by establishing mathematical models and differential methods. Multipath has become one of the main error sources of current satellite navigation system positioning. Traditional BPSK receivers generally use code-related reference waveform technology to eliminate multipath errors. The code-related reference waveform technology constructs a relatively ideal pseudo-code phase discrimination function by generating a series of reference waveforms locally. Traditional reference waveforms include W2 waveform, W3 waveform, W4 waveform, etc., which are only affected by short-delay multipath signals when applied to BPSK signals. ...

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): G01S19/22
CPCG01S19/22
Inventor 倪少杰刘哲张国柱张勇虎庞晶伍微唐小妹刘瀛翔黄仰博
Owner 湖南中电星河电子有限公司
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