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A anti-jamming method for satellite navigation system based on multi-objective optimization technique.

Rongling Lang1, Hong Xiao1, Zi Li2

  • 1School of Electronics and Information Engineering, Beihang University, Beijing, China.

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|July 14, 2017
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Summary
This summary is machine-generated.

This study introduces a novel anti-jamming technique for Global Positioning System (GPS) signals. The method enhances signal quality by reducing interference, improving the signal-to-noise ratio (SNR) and algorithm robustness.

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Area of Science:

  • Signal Processing
  • Navigation Systems
  • Electromagnetic Interference Mitigation

Background:

  • Adaptive nulling methods often create wide or incorrect nulls, degrading signal quality.
  • Jamming near satellite signals significantly reduces the signal-to-noise ratio (SNR).
  • Robustness in navigation algorithms is crucial for reliable positioning.

Purpose of the Study:

  • To propose a novel anti-jamming method for GPS signals.
  • To address limitations of existing adaptive nulling techniques.
  • To improve SNR and algorithm robustness in the presence of jammers.

Main Methods:

  • Transforming a single-objective optimization into a multi-objective one using the 2-norm.
  • Developing a jamming suppression technique to mitigate interference.
  • Evaluating the method through simulations and outdoor experiments using GPS L1 C/A signals.

Main Results:

  • The proposed method effectively reduces wide and wrong nulls caused by jammers.
  • Achieved a better signal-to-noise ratio (SNR), particularly with nearby jammers.
  • Demonstrated improved algorithm robustness compared to common methods.
  • Experimental results confirmed narrower nulls targeting jammers and elimination of wrong nulls.

Conclusions:

  • The novel anti-jamming method offers superior performance in suppressing interference for GPS signals.
  • The technique enhances SNR and robustness, crucial for reliable navigation systems.
  • Validated effectiveness through both simulations and real-world GPS L1 C/A signal experiments.