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A Design Method of Code Correlation Reference Waveform in GNSS Based on Least-Squares Fitting.

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Summary
This summary is machine-generated.

This study proposes a new method to improve Global Satellite Navigation Systems (GNSSs) by mitigating multipath errors in binary offset carrier (BOC) signals, preventing false lock issues.

Keywords:
BOCCCRWGNSSSVDleast-squaresmultipath

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Area of Science:

  • Satellite Navigation Systems
  • Signal Processing
  • Geomatics Engineering

Background:

  • Multipath effect is a primary error source in Global Satellite Navigation Systems (GNSSs).
  • Code Correlation Reference Waveform (CCRW) effectively mitigates multipath for Binary Phase Shift Keying (BPSK) signals.
  • CCRW faces false lock issues with Binary Offset Carrier (BOC) signals.

Purpose of the Study:

  • To propose a novel least-squares approximation method for designing CCRW discriminators.
  • To address the false lock problem encountered by CCRW with BOC signals.
  • To evaluate the performance of the proposed method for various BOC signals.

Main Methods:

  • A least-squares approximation design scheme for CCRW.
  • Utilizing truncated singular value decomposition (SVD).
  • Testing on BPSK, BOC(1,1), BOC(2,1), BOC(6,1), and BOC(7,1) signals.

Main Results:

  • The proposed method generates coherent and non-coherent CCRW discriminators without false lock points.
  • Performance analysis focused on multipath error envelope and tracking jitter.
  • Approximation results for CCRWs were presented and analyzed.

Conclusions:

  • The developed method successfully mitigates false lock issues in BOC signals.
  • While tracking jitter may see minor degradation, multipath error envelope performance improves for BPSK and BOC(1,1) signals.
  • The approach is applicable to high-order BOC signals, enhancing GNSS robustness.