A New Asymmetric Correlation Kernel for GNSS Multipath Mitigation

Steven Miller, Xue Zhang, Andreas Spanias

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Multipath is the dominant error source in precise positioning Global Navigation Satellite Systems (GNSS) such as the United States Global Positioning System (GPS). These systems utilize the satellite signal time of arrival estimates to solve for position. Multipath corrupts the time of arrival estimates by distorting the signal tracking phase discriminator; which results in a slowly time- varying phase bias. This bias ranges from several centimeters to tens of meters. The submeter bias is the most problematic for centimeter positioning systems. Moreover, in addition to multipath, the GPS spread spectrum code is unbalanced for certain space vehicles which can lead to a code tracking phase bias. A new correlation kernel is proposed as part of a multipath mitigating delay-locked- loop code phase discriminator that does not suffer a tracking bias due to unbalanced spreading codes. This new algorithm performance is compared to existing techniques with respect to position bias and robustness.

Original languageEnglish (US)
Title of host publication2015 Sensor Signal Processing for Defence, SSPD 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479974443
DOIs
StatePublished - Oct 2 2015
Event5th Sensor Signal Processing for Defence, SSPD 2015 - Edinburgh, United Kingdom
Duration: Sep 9 2015Sep 10 2015

Other

Other5th Sensor Signal Processing for Defence, SSPD 2015
CountryUnited Kingdom
CityEdinburgh
Period9/9/159/10/15

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Keywords

  • correlation
  • DSSS
  • GPS
  • multipath

ASJC Scopus subject areas

  • Signal Processing
  • Instrumentation

Cite this

Miller, S., Zhang, X., & Spanias, A. (2015). A New Asymmetric Correlation Kernel for GNSS Multipath Mitigation. In 2015 Sensor Signal Processing for Defence, SSPD 2015 [7288498] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SSPD.2015.7288498