Generalized discriminator and its applications in GNSS signal tracking

Jyh-Chin Juang, Tsai Ling Kao

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

8 Citations (Scopus)

Abstract

The tracking of new-generation GNSS signals including Galileo and modernized GPS signals are considered to be more challenging than that with respect to legacy GPS signals. Typically, the tracking system is required to accomplish several, sometimes conflicting, objectives including acceptable tracking error under noise and multipath, fast response with respect to changing signal reception conditions, and ability to deal with nonlinearities due to multiple equilibria due to MBOC modulation. The design of the discriminator, which is an essential ingredient of the tracking loop, is deemed important as it affects the resulting sensitivity, bias, error, and ambiguities. To this end, several different discriminators including BPSK-like, subcarrier cancellation, multi-correlation, autocorrelation sidepeak correlation, BOC/PRN, and weighted discriminator schemes have been investigated. In the paper, a generalized discriminator is proposed with an aim to analyze most existing discriminators under the same framework. After presenting the generalized discriminator, its tracking performance under noise is analyzed. The risk of ambiguous tracking is then assessed and a condition for unambiguous tracking is established. Simulation results are then provided to illustrate the generalized discriminator in GNSS signal tracking. Finally, some comparative results on implementation are addressed. The investigation on generalized discriminator which put all potential design parameters under the same framework is believed to be beneficial to GNSS receiver designers in trading-off various issues including design complexity and achievable performance.

Original languageEnglish
Title of host publication23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010
Pages3251-3257
Number of pages7
Publication statusPublished - 2010 Dec 1
Event23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010 - Portland, OR, United States
Duration: 2010 Sep 212010 Sep 24

Publication series

Name23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010
Volume4

Other

Other23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010
Country/TerritoryUnited States
CityPortland, OR
Period10-09-2110-09-24

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication

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