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Self-adaptation repeated resampling navigation satellite capturing method and achieving system thereof

A navigation satellite and resampling technology, which is applied in the field of satellite navigation and positioning, can solve the problems of weak signal and time-consuming, and achieve the effect of shortened time and obvious capture effect

Active Publication Date: 2015-01-21
JINAN DINGRUN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To carry out navigation tracking and navigation calculation, at least four visible navigation satellites need to be captured, but not all received visible navigation satellite signals are weak signals, so only short data acquisition methods cannot capture enough navigation satellites, but The capture method using only long data is too time-consuming

Method used

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  • Self-adaptation repeated resampling navigation satellite capturing method and achieving system thereof
  • Self-adaptation repeated resampling navigation satellite capturing method and achieving system thereof
  • Self-adaptation repeated resampling navigation satellite capturing method and achieving system thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] An adaptive multiple resampling navigation satellite acquisition method, the specific steps include:

[0037] (1) start;

[0038] (2) Define an array and initialize parameters: the initial value of the captured visible navigation satellite number SV is 0, the value range of the visible navigation satellite number S to be captured is 4≤S≤12, and the initial value of the local intermediate frequency carrier number m is 1 , 1≤m≤29, the frequency interval of the local intermediate frequency carrier is +500Hz or -500Hz, the value range of the capture threshold Th is 2.5≤Th≤5, and the frequency of the intermediate frequency signal obtained by resampling is n of the local intermediate frequency carrier times, the initial value of n is 2, and the values ​​of n are 2, 3, 4;

[0039] (3) Resampling the received intermediate frequency signal: resampling the received intermediate frequency signal, the frequency of the intermediate frequency signal after resampling is n times the f...

Embodiment 2

[0051] A system for implementing the method described in Embodiment 1, comprising: an intermediate frequency signal resampling module, a baseband frequency mixing and time-frequency transformation module, a frequency domain mixing and frequency-time transformation module, a judge module, a resampling controller module, a local The intermediate frequency carrier generation module and the domain frequency PRN generation module, the intermediate frequency signal resampling module, the baseband frequency mixing and time-frequency conversion module, the frequency domain mixing and frequency-time conversion module, the judge module, the The resampling controller modules are connected end to end in sequence, the resampling controller module, the local intermediate frequency carrier generation module, the baseband frequency mixing and time-frequency conversion module are connected in sequence, the resampling controller module, the domain frequency The PRN generation module, the frequen...

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Abstract

The invention relates to a self-adaptation repeated resampling navigation satellite capturing method. Intermediate frequency signals are resampled through a resampling technology, and the times of resampling needing to be conducted for capturing enough visible navigation satellites are automatically judged by adding a self-adaptation technology. By means of the self-adaptation repeated resampling navigation satellite capturing method, the visible navigation satellites are rapidly captured, and the speed is one time higher than that of the capturing method without the resampling technology. Due to the fact that the self-adaptation n-times resampling technology is further adopted in the self-adaptation repeated resampling navigation satellite capturing method, the visible navigation satellites in the enough number can be captured for conducting subsequent handling. By means of the self-adaptation repeated resampling navigation satellite capturing method, the effect of capturing signals with high radio-frequency front end sampling frequency is more obvious, and the time for capturing the navigation satellites is obviously shortened. The processed data are reduced, and thus the data processing time is shortened.

Description

technical field [0001] The invention relates to an adaptive multiple resampling navigation satellite acquisition method and an implementation system thereof, belonging to the technical field of satellite navigation and positioning. Background technique [0002] After more than 20 years of development history, satellite navigation technology has become increasingly mature, and today's satellite navigation systems have become richer. In addition to the US GPS, there are Russia's GLONASS, the EU's GALILEO and China's Beidou. Satellite navigation positioning has gradually entered people's daily life, such as car navigation, positioning of children and the elderly, etc. Today's smartphones are equipped with one or more navigation systems, and the applications of satellite navigation are endless. There are two kinds of satellite navigation receivers widely used at present: dedicated navigation equipment based on ASIC structure, called hardware receiver; navigation equipment based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/24G01S19/30
CPCG01S19/246
Inventor 王永毛刚徐辉周景涛刘金鑫
Owner JINAN DINGRUN ELECTRONICS TECH