Toshihiko Ryu

Title: Innovations of Toshihiko Ryu

Introduction

Toshihiko Ryu is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of digital radio systems, holding a total of 11 patents. His work has been instrumental in advancing communication technologies.

Latest Patents

One of his latest inventions is a one frequency repeater for a digital radio system. This device includes a receiver for receiving a reception signal through a receiving antenna, a variable frequency characteristic filter for generating a signal to cancel an interference signal caused by leakage of a transmission signal into the receiving antenna, and an adder for combining the interference signal with the reception signal. Additionally, it features a demodulator for demodulating the output signal from the adder, a data converter for converting the output signal from the modulator, a modulator for modulating a carrier based on the output from the data converter, and a transmitter for sending the modulated output signal from a transmitting antenna. The variable frequency characteristic filter is controlled in response to a control signal that includes the output from the data converter, supplying the interference cancellation signal to the adder.

Another notable patent is the cross-polarization interference canceller. This device is designed to reset a cross-polarization interference canceller used in a digital radio communications receiver. It incorporates two polarized-signal discriminators that are coupled to receive reproduced digital data from corresponding demodulators. If the demodulator produces an output that is not characteristic, the corresponding polarized-signal discriminator generates a reset signal to reset the canceller.

Career Highlights

Toshihiko Ryu has worked with notable companies such as NEC Corporation and Nippon Electric Co., Ltd. His experience in these organizations has contributed to his expertise in the field of digital communications.

Collaborations

Throughout his career, Ryu has collaborated with talented individuals, including Yutaka Koizumi and Masato Tahara. These partnerships have fostered innovation and development in his projects.

Conclusion

Toshihiko Ryu's contributions to digital radio technology through his patents and collaborations highlight his significant role as an inventor. His work continues to influence advancements in communication systems.