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Software receiver for indoor position and navigation technology of global positioning system

A global positioning system and software receiver technology, which is applied in the field of satellite positioning and navigation, can solve the problems of positioning accuracy, stability, reliability, and real-time performance, and achieve the goals of improving sensitivity, increasing capture time, and improving signal-to-noise ratio Effect

Inactive Publication Date: 2007-09-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, generally speaking, the current GPS positioning technology that meets the requirements of the indoor environment is not very mature, and the existing indoor GPS receiver products are not ideal in terms of positioning accuracy, stability, reliability and real-time performance.

Method used

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  • Software receiver for indoor position and navigation technology of global positioning system
  • Software receiver for indoor position and navigation technology of global positioning system
  • Software receiver for indoor position and navigation technology of global positioning system

Examples

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0028] Assuming that the receiver is in complex environments such as indoors, forests, and cities, the power of the GPS signal is attenuated by 20dB, and the power of the GPS signal reaching the L1 band of the receiver is only -180dBW.

[0029] According to the processing flow in Fig. 1, the GPS electromagnetic wave arriving by RF is changed into a microwave electric signal and amplified. Carry out band-pass sampling on the 1575.42MHz RF carrier with a sampling frequency of 5MHz to realize frequency conversion. The sampled digital signal enters the digital processing part of the receiver through the USB channel.

[0030] The acquisition is based on the circular correlation algorithm, and the method of correlation accumulation and non-correlation accumulation is used to capture the weak GPS signal whose power is only -180dBW. make and ...

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PUM

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Abstract

A software receiver of satellite positioning and navigation consists of receiver analog unit and receiver digital unit. It is featured as using computer program to realize all algorithms of seizing algorithm and track demodulation algorithm as well as position calculation algorithm in digitalized channel of receiver digital unit.

Description

technical field [0001] The invention belongs to the field of satellite positioning and navigation, in particular to the positioning and navigation of a high-precision global positioning system (hereinafter referred to as GPS) in an indoor environment. Background technique [0002] The research on GPS positioning and navigation technology in indoor environment mainly revolves around the acquisition, tracking, processing and application of weak GPS signals in indoor environment. The rich connotation and huge practical value of GPS application technology in indoor environment have attracted the attention of military departments, scientific research institutions and related units in many countries. Navigation and positioning technology in indoor environment has become a research hotspot all over the world. At present, the research on navigation and positioning technology in indoor environment mainly focuses on high-sensitivity GPS (HSGPS) technology and assisted GPS (AGPS) techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01S5/14G01S19/37
Inventor 皮亦鸣付毓生闵锐田世君黄鹏达蔡昌听谢勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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