Yoshito Ohta

Title: The Ingenious Mind of Yoshito Ohta

Introduction

Yoshito Ohta, a talented inventor based in Tokorozawa, Japan, has made significant contributions to the field of communications technology. With a total of six patents to his name, Ohta’s innovations have paved the way for advancements in CDMA communication systems, enhancing the effectiveness and reliability of wireless communications.

Latest Patents

Among his latest inventions is a groundbreaking patent for a CDMA communication system and method. In this system, the base station detects the phase difference between a reference phase of a spreading code and the phase of a received signal from each terminal station. It then transmits a phase jump signal, PJ-i, which represents the phase difference back to each terminal station. After the terminal stations acquire timing, they utilize the reference phase during reception. A shift amount between the received signal's phase and the reference phase is communicated as phase synchronization control information (PC-i). This enables each terminal station to coarsely adjust the phase of its spreading code according to the phase jump signal. Subsequently, it can finely tune the phase of its transmitting signal based on the synchronization information, ensuring that the signals from terminal stations are perfectly synchronized upon receipt at the base station. To achieve this, an orthogonal code is used for spreading on the reverse links.

Career Highlights

Yoshito Ohta's career has been marked by his association with notable companies in the tech industry, including Hitachi Denshi and Hitachi, Ltd. His work has focused primarily on improving communication technologies, showcasing his passion for innovation in this crucial sector.

Collaborations

Throughout his career, Ohta has collaborated with esteemed colleagues, including Masayuki Ariyoshi and Nobukazu Doi. Together, they have contributed to the development and refinement of various technological advancements that have impacted the communication landscape.

Conclusion

Yoshito Ohta stands out as a prominent inventor whose work in CDMA communication has opened new avenues for wireless communication technology. His patents reflect a deep understanding of the intricate mechanisms involved in signal processing and phase synchronization, which are essential for modern communication systems. Through his innovations, Ohta continues to influence and shape the future of telecommunications.