Location History:
- Nishinasunomachi, JP (1990)
- Kawasaki, JP (1993 - 2004)
Company Filing History:
Years Active: 1990-2004
Title: Yoshiaki Kumagai: Innovator in Mobile Communication Technology
Introduction
Yoshiaki Kumagai is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of mobile communication technology, holding a total of 11 patents. His work has been instrumental in advancing the efficiency and functionality of communication systems.
Latest Patents
Kumagai's latest patents include a radio base station for a CDMA mobile communication system. This innovative base station is designed to allocate radio channels to mobile stations at various bit rates. It features a storage part that maintains a maximum number of radio channels, ensuring that the signal-to-interference noise power ratio for each channel exceeds a predetermined value. The maximum number of channels can change in steps based on the bit rate used for the current call. Additionally, he has developed a base station transmitter-receiver that addresses synchronization issues between base stations. This system includes a synchronous controller that adjusts the reception mode to ensure proper timing between transmissions.
Career Highlights
Throughout his career, Kumagai has worked with notable companies such as Fujitsu Corporation and Fujitsu Limited. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies in mobile communications.
Collaborations
Kumagai has collaborated with esteemed colleagues, including Eiji Itaya and Yoichi Endo. Their combined expertise has fostered innovation and development in the field.
Conclusion
Yoshiaki Kumagai's contributions to mobile communication technology are noteworthy, with a focus on enhancing the efficiency of radio base stations. His patents reflect a deep understanding of the complexities involved in communication systems, making him a key figure in the industry.