Real time software GPS receiver with new fast tracking method

Type :

Term papers

Pages :

5 pages

Format :

.pdf

Published date :

10/09/2009

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Summary :

 
 

Table of Contents Real time software GPS receiver with new fast tracking method Table of Contents

 
  1. Abstract
  2. Introduction
  3. Software receiver structure
  4. GPS signal acquisition
    1. GPS signal acquisition: Modified algorithm
    2. GPS signal carrier pull in
  5. GPS signal tracking
  6. Conclusion and future work
  7. References

Abstract

This work is part of an effort to develop a receiver that solely depends upon software based processing. Correlation operations are performed in software rather than using a hardware correlators. The receiver consists of RF front end and a SHARC DSP processor. The RF front end converts the L1 signal (1575.42 MHz) into a 2-bit digital data bit stream at 5.714 MHz. Only sign bit is read in to the SHARC processor through serial port. Data is collected through chained DMA module so as to make real time processing of the collected data possible. This paper will discuss in detail about the gps signal processing and various real time implementation issues involved. In order to extract the navigation data bits being transmitted by a particular satellite, an acquisition method must be used to detect the presence of the signal being transmitted by that satellite. Once particular satellite signal is detected, necessary parameters should be obtained so that signal can be tracked continuously to obtain the navigation data bits. So, signal acquisition is nothing but signal detection problem.

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About the author :

pencil image Vijay P. Director of Shri HDG MBA College
Level :General public Study : Management School/University : Saurashtra University

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