Jong-sub Cha

Title: **Inventor Spotlight: Jong-sub Cha**

Introduction

Jong-sub Cha is an innovative inventor based in Seoul, South Korea, who has made significant contributions to the field of wireless communication technology. With a total of three patents to his name, his work has focused primarily on improving frequency estimation methods and enhancing radio frequency identification (RFID) apparatus functionality. Cha's inventions are paving the way for advancements in efficient communication systems.

Latest Patents

Jong-sub Cha's most recent patents include two significant inventions:

1. **Parallel Automatic Frequency Offset Estimation Method and Apparatus**

This invention discloses a wireless signal receiving apparatus and offers a method for tracking frequency offsets in a rapid manner. By calculating frequency offsets in parallel, the system can determine frequency and phase deviations at different bit intervals within a data frame. This leads to a more-efficient first sum of deviations that results in improved speed and accuracy for transmission frequency tracking, especially in the initial frame.

2. **Active RFID Apparatus for Improving PN Code Generation**

This patent introduces an active RFID apparatus featuring an additional transmitter. It includes a first pseudo noise (PN) code generator that complies with recognized ISO standards. The second transmitter performs operations on the generated PN codes to enhance auto-correlation and cross-correlation characteristics. This advancement enables better code discrimination and improves the overall performance of RFID systems.

Career Highlights

Throughout his career, Jong-sub Cha has worked at reputable organizations such as the Electronics and Telecommunications Research Institute (ETRI) and Samsung Electronics Co., Ltd. His experience at these institutions has equipped him with a solid foundation in research and development, contributing to his innovative prowess.

Collaborations

Cha has collaborated with fellow inventors and researchers, including Seung-Il Myong and Heyung-sub Lee. These partnerships have fostered creativity and innovation, allowing for the exchange of ideas and expertise, which play crucial roles in the development of groundbreaking technologies.

Conclusion

Jong-sub Cha's contributions to wireless communication technologies demonstrate his dedication to innovation and advancement in the field. With his patent on automatic frequency offset estimation and the innovative RFID apparatus, Cha continues to influence the landscape of communication systems. As technology evolves, his work is likely to inspire future inventions that will further enhance efficiency and reliability in wireless communications.