Joseph W Fontes

Title: Joseph W. Fontes: Innovator in GNSS Technology

Introduction

Joseph W. Fontes is a notable inventor based in San Jose, CA, specializing in advancements in Global Navigation Satellite System (GNSS) technology. He holds a total of 3 patents that contribute significantly to the field of satellite navigation.

Latest Patents

Fontes' latest patents focus on enhancing the performance of GNSS signal receivers. One of his key inventions is a system for GNSS time fraction calibration of a real-time clock. This innovation allows for a fast time to first fix by calibrating a low power always-on real-time clock (RTC). The receiver includes an RTC calibrator with a fraction calculator and a time expander. Before powering off, the fraction calculator determines a time fraction for RTC time using the fine resolution of GNSS time. Upon powering back on, the time expander estimates RTC time drift and calibrates the RTC time for improved accuracy. This calibrated RTC time assists in achieving a first fix with code phase search and enhances the resolution of GPS satellite positioning.

Career Highlights

Joseph W. Fontes is currently employed at Trimble Navigation Limited, where he continues to innovate in the field of GNSS technology. His work has been instrumental in developing systems that improve the efficiency and accuracy of satellite navigation.

Collaborations

Fontes has collaborated with notable colleagues, including Xiaorong Zhi and Yiming Jim Yu, contributing to various projects that advance GNSS technology.

Conclusion

Joseph W. Fontes is a significant figure in the realm of GNSS innovations, with a focus on improving satellite navigation systems. His contributions through patents and collaborations continue to shape the future of navigation technology.