Company Filing History:
Years Active: 1994
Title: Naoki Ishiyama: Innovator in Optical Transmission Systems
Introduction
Naoki Ishiyama is a prominent inventor based in Osaka, Japan. He is known for his contributions to the field of optical transmission systems. With a focus on enhancing digital signal transmission, Ishiyama has made significant strides in technology.
Latest Patents
Ishiyama holds a patent for an optical transmission system. This system provides digital signals that have added bits for error correction through an encoder. These signals are converted into 16-QAM signals with a predetermined carrier frequency by a modulator. The signals are then frequency division multiplexed with an AM signal to be inputted to an optical-electric converter. When the total sum of the light modulation indices of signals to be transmitted exceeds 1, the light modulation index of an M-QAM signal is calculated to ensure optimal performance. The multiplexed signals are transmitted via optical fiber and converted into electric signals by a photo receiver, demodulated by a demodulator, and outputted after error correction by an error corrector.
Career Highlights
Naoki Ishiyama is associated with Matsushita Electric Industrial Co., Ltd., a leading company in the electronics industry. His work has contributed to advancements in optical communication technologies. Ishiyama's innovative approach has positioned him as a key figure in his field.
Collaborations
Ishiyama has collaborated with notable coworkers, including Kazuki Maeda and Hiroaki Nakata. Their combined expertise has fostered a productive environment for innovation and development.
Conclusion
Naoki Ishiyama's work in optical transmission systems exemplifies the impact of innovation in technology. His contributions continue to influence the field and pave the way for future advancements.