Phase/frequency tracking in a GNSS software receiver

Jyh Ching Juang, Yu Hsuan Chen

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


In the paper, a software-based technique for the tracking of frequency and phase of Global Navigation Satellite System (GNSS) signals is proposed. It is shown that a software-based receiver with precomputed, zero-phase carrier replicas for phase tracking is subject to phase jump in phase tracking and ambiguity problems in frequency estimation. A phase/frequency tracking architecture is proposed in which the frequency of the incoming signal is estimated based on a lead-lag structure which is similar to a traditional delay locked loop and the phase, after de-rotation, is estimated using a frequency-aiding phase locked loop. The effects of thermal noise and resolution-induced noise are analyzed and verified using simulation. The significance of frequency aiding in enhancing the phase tracking response is also described.

Original languageEnglish
Pages (from-to)651-660
Number of pages10
JournalIEEE Journal on Selected Topics in Signal Processing
Issue number4
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

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