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A Flexible System-on-Chip Field-Programmable Gate Array Architecture for Prototyping Experimental Global Navigation

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Researchers developed a low-cost System-on-Chip Field-Programmable Gate Array (SoC-FPGA) architecture for rapid prototyping of Global Navigation Satellite System (GNSS) receivers. This flexible design enables testing of novel GNSS features using live signals.

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Area of Science:

  • Electrical Engineering
  • Computer Engineering
  • Aerospace Engineering

Background:

  • Global Navigation Satellite System (GNSS) technology is advancing rapidly, necessitating agile research and development tools.
  • Increasing complexity of GNSS integrated circuits (ICs) limits researchers' ability to modify or inspect receiver internals.
  • Existing prototyping methods may lack the flexibility or efficiency required for cutting-edge GNSS research.

Purpose of the Study:

  • To design and present a low-cost System-on-Chip Field-Programmable Gate Array (SoC-FPGA) architecture for experimental GNSS receiver prototyping.
  • To enable the development of compact, portable, multi-channel, and multi-constellation GNSS receivers.
  • To provide a flexible platform for testing novel and non-standard GNSS features with live signals.

Main Methods:

  • Developed a System-on-Chip Field-Programmable Gate Array (SoC-FPGA) architecture.
  • Integrated Software-Defined Radio (SDR) techniques with FPGA energy efficiency.
  • Designed and evaluated a general-purpose GNSS receiver as a research testbed.

Main Results:

  • Demonstrated the ability to acquire and track GNSS signals in static and low Earth orbit (LEO) scenarios.
  • Assessed the quality of navigation observables.
  • Evaluated the accuracy of navigation solutions derived from the prototype receiver.

Conclusions:

  • The proposed SoC-FPGA architecture offers a flexible and efficient solution for prototyping advanced GNSS receivers.
  • The developed testbed receiver successfully acquires and tracks GNSS signals, validating its performance for research applications.
  • This approach facilitates the exploration of innovative GNSS functionalities and system designs.