EDGE Microwave’s white paper ‘An Overview of GNSS’ provides a high-level introduction to the architectural foundations and ongoing evolution of Global Navigation Satellite Systems (GNSS), which underpin modern Positioning, Navigation, and Timing (PNT) services worldwide.
The paper outlines how global and regional GNSS share a common three-segment architecture, space, control, and user, and highlights the four primary global constellations providing worldwide coverage: GPS (United States), GLONASS (Russia), Galileo (European Union), and BeiDou (China). It also notes the role of regional navigation satellite systems such as Japan’s QZSS and India’s NavIC in extending coverage and improving service availability in specific geographic areas.
Focusing on system-level trends rather than application detail, the article discusses how modern GNSS technologies are converging toward multi-frequency, CDMA-based, and interoperable signal structures. These developments support improvements in positioning accuracy, robustness, and interoperability, while enhancing resilience against interference and jamming.
Concluding, the white paper positions GNSS as critical global infrastructure and presents a technical foundation for further study in areas such as receiver design, signal simulation, and interference mitigation.
