Company Filing History:
Years Active: 2012-2016
Title: Noriyasu Nakayama: Innovator in Digital Communication Technologies
Introduction
Noriyasu Nakayama is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of digital communication technologies, holding a total of 8 patents. His work focuses on enhancing the efficiency and performance of optical communication systems.
Latest Patents
One of Nakayama's latest patents is for a digital coherent receiving apparatus. This apparatus includes a first oscillator that outputs a local light signal of a fixed frequency. It also features a hybrid unit that mixes the local light signal with a light signal received by a receiver. Additionally, it has a second oscillator for outputting a sampling signal of a sampling frequency, a converter for converting the mixed light signal into a digital signal, and a waveform adjuster for adjusting waveform distortion. The apparatus further includes a phase adjustor, a demodulator, a phase detector, and a control signal output unit that generates a frequency control signal based on the detected phase signal.
Another notable patent is for an adaptive equalizer, optical receiver, and tap coefficient correcting method. This adaptive equalizer consists of a finite impulse response filter with a predetermined number of taps. It also includes a tap coefficient adaptive controller that holds tap coefficients for the filter, calculates a weighted center of the tap coefficients, and shifts the tap coefficients based on the calculated result. During the initial training period, the tap coefficient shifter adjusts the coefficients to minimize the difference between the calculated weighted center and the defined tap center.
Career Highlights
Noriyasu Nakayama is currently employed at Fujitsu Corporation, where he continues to innovate in the field of digital communication. His work has been instrumental in advancing technologies that improve data transmission and reception.
Collaborations
Throughout his career, Nakayama has collaborated with notable colleagues, including Nobukazu Koizumi and Hisao Nakashima. These collaborations have contributed to the development of cutting-edge technologies in the industry.
Conclusion
Noriyasu Nakayama's contributions to digital communication technologies have established him as a key figure in the field. His innovative patents and ongoing work at Fujitsu Corporation continue to shape the future of optical communication systems.
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