Jong-Ki Lee

Title: Innovations of Jong-Ki Lee

Introduction

Jong-Ki Lee is a notable inventor based in San Jose, CA, with a focus on advancements in satellite measurement and sensor integration technologies. He holds 3 patents that showcase his expertise in enhancing the functionality and reliability of Global Navigation Satellite Systems (GNSS) and sensor data fusion.

Latest Patents

One of his latest patents is titled "Method of multiple satellite measurement failure detection and isolation for GNSS." This invention describes methods for reducing the resources needed to detect and identify faulty pseudorange measurements in a GNSS receiver. In this Receiver Autonomous Integrity Monitoring (RAIM) method, a position solution is calculated using a weighted least squares method on measurements from satellites of one or more GNSS constellations. A test statistic is calculated from residuals, and a threshold is determined based on a probability function. If the test statistic meets or exceeds the threshold, a subset of pseudorange measurements is selected using a metric indicative of possible measurement error. A measurement is then chosen from this subset based on signal strength or another metric and discarded from the set of pseudorange measurements. If more than five measurements remain, the method loops back to the position solution calculation step.

Another significant patent is the "Method and apparatus for data fusion of a three-axis magnetometer and three-axis accelerometer." This invention integrates a three-axis magnetometer and a three-axis accelerometer to provide calibrated data for attitude and heading, while also removing sensor error sources over time and temperature. The method compensates for hard and soft iron distortions of the Earth's magnetic field. Filtered accelerometer data are corrected for various error sources, and the magnetic heading is calculated from a horizontal magnetic field vector transformed from the three-dimensional Earth's magnetic field vector. Two Kalman filters are employed to estimate correction matrices, ensuring accurate sensor data integration.

Career Highlights

Jong-Ki Lee has worked with prominent companies such as Samsung Electronics and Memsic, where he contributed to innovative projects that leverage his expertise in sensor technologies and GNSS systems. His work has significantly impacted the fields of navigation and sensor integration.

Collaborations

He has collaborated with notable professionals in the industry, including Makarand Phatak and Dong An, enhancing the development of his inventions through teamwork and shared expertise.

Conclusion

Jong-Ki Lee's contributions to the fields of