Overcoming the challenges of BeiDou receiver implementation.

Area of Science:

• Satellite Navigation Systems
• Signal Processing
• Geomatics Engineering

Background:

• Global Navigation Satellite System (GNSS) receivers are evolving with new systems like BeiDou (BDS) and Galileo.
• Modernization of GPS and GLONASS includes more frequencies and signal changes for challenging applications.
• The development of multi-GNSS receivers is crucial due to these advancements.

Purpose of the Study:

• To discuss the functionalities of a software-defined BeiDou receiver.
• To compare BeiDou B1 and GPS L1 C/A signal characteristics.
• To implement and evaluate novel signal acquisition and carrier-to-noise ratio estimation techniques for BDS.

Main Methods:

• Software-defined receiver implementation for BeiDou Navigation Satellite System (BDS).
• Analysis of signal similarities and differences between BeiDou B1 and GPS L1 C/A signals.
• Development of novel acquisition techniques for BeiDou D1 and GEO signals.
• Implementation of a carrier-to-noise density ratio estimation technique without prior bit synchronization.

Main Results:

• Successful implementation of a software-defined BeiDou receiver.
• Demonstration of a BeiDou-only position fix using all three BDS constellations.
• Presentation of a multi-GNSS position fix integrating GPS and BDS systems.
• Comparison of positioning performance between GPS and BDS.

Conclusions:

• The developed software-defined BeiDou receiver effectively processes BDS signals.
• Novel techniques enhance signal acquisition and carrier-to-noise ratio estimation in GNSS receivers.
• Multi-GNSS capabilities, particularly with GPS and BDS, offer robust positioning solutions.