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For the Inventor, By the Inventor

Kawasaki, Japan

Nobukazu Koizumi

USPTO Granted Patents = 45 


Average Co-Inventor Count = 4.1

ph-index = 11

Forward Citations = 499(Granted Patents)


Company Filing History:

goldMedal44 out of 39,244 
 
Fujitsu Corporation
 patents
silverMedal1 out of 1 
 
Fujitsu Limimited
 patent

Years Active: 1994-2022

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Areas of Expertise:
Signal Processing
Adaptive Equalizer
Optical Receiver
Digital Coherent Receiver
Optical Communication
Digital Subscriber Line
Optical Amplification
Echo Canceller
Waveform Distortion Compensation
Jitter Compensation
Transversal Filter
Performance Evaluation
45 patents (USPTO):Explore Patents
1. 11476946 - Signal processing device and transmission device (2022-10-18),
2. 11159352 - Adaptive equalizer, optical receiver, and optical transmission system (2021-10-26),
3. 11146428 - Adaptive equalizer, optical receiver, and adaptive equalization method (2021-10-12),
4. 10931485 - Adaptive equalization circuit and optical receiver (2021-02-23),
5. 10560199 - Signal processing circuit and optical receiving device (2020-02-11),
6. 10177855 - Amplitude adjustment circuit, digital coherent receiver, and amplitude adjustment method (2019-01-08),
7. 9680667 - Adaptive equalization circuit, digital coherent receiver, and adaptive equalization method (2017-06-13),
8. 9660733 - Signal processing apparatus, signal processing method, and signal processing system (2017-05-23),
9. 9496966 - Optical communication receiving device and frequency offset compensation method (2016-11-15),
10. 9444554 - Digital coherent receiving apparatus (2016-09-13),
11. 9407471 - Adaptive equalizer tap coefficient correction method and optical receiver (2016-08-02),
12. 8861980 - Loop filter (2014-10-14),
13. 8693898 - Adaptive equalizer, optical receiver, and tap coefficient correcting method (2014-04-08),
14. 8649689 - Digital coherent receiving apparatus (2014-02-11),
15. 8606118 - Optical digital coherent receiver (2013-12-10),

Title: Innovator Profile: Nobukazu Koizumi

Introduction: Nobukazu Koizumi is a prominent inventor based in Kawasaki, Japan, known for his significant contributions to signal processing and optical communication technologies. With a remarkable portfolio of 45 patents, Koizumi has played a critical role in advancing innovations in his field.

Latest Patents: Among Koizumi's latest inventions are two innovative patents that enhance the efficiency and reliability of optical signal transmission. The first patent describes a signal processing device that includes a memory and a processor designed to compensate for optical frequency offsets in signals. This device accurately adjusts for discrepancies between light sources on both the transmission and reception sides, enhancing the overall quality of optical communications.

The second patent focuses on an adaptive equalizer used in optical systems. This device incorporates a sample buffer for data obtained through fractional sampling and is configured to determine the position of training sequences within the data stream. By leveraging specific correlations, the equalizer adjusts its tap coefficients based on variable symbol lengths, thus improving signal processing capabilities.

Career Highlights: Koizumi's career includes significant roles at Fujitsu Corporation and Fujitsu Limited, where he honed his skills and contributed to major technological advancements. His work has been instrumental in shaping modern optical communication systems, making him a respected figure in the industry.

Collaborations: Throughout his career, Koizumi has collaborated with notable professionals, including Yutaka Awata and Seiji Miyoshi. These partnerships have facilitated the development of groundbreaking technologies, further solidifying his impact on the field.

Conclusion: With a rich legacy of innovation and a dedication to advancing optical signal processing technologies, Nobukazu Koizumi continues to be a leading force in his domain. His latest patents not only demonstrate his expertise but also contribute significantly to the future of communication technologies.

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