Keisuke Dohi

Title: Keisuke Dohi: Innovator in Optical Communication Technology

Introduction

Keisuke Dohi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical communication technology, holding a total of 5 patents. His work focuses on developing advanced devices that enhance the efficiency and effectiveness of optical communication systems.

Latest Patents

One of Dohi's latest patents is a likelihood generation device. This device includes a similarity detection unit, a likelihood table reference unit, and a similarity processing unit. The similarity detection unit receives a modulation scheme selection signal and a received value, detecting a likelihood similarity between information bits based on the modulation scheme selection signal. It outputs a likelihood selection signal that specifies likelihood data to be searched for and an operation selection signal that specifies an operation on the likelihood data. The likelihood table reference unit registers likelihood data and extracts it based on the likelihood selection signal. The similarity processing unit then obtains the entire likelihood distribution by performing an operation designated by the operation selection signal on the extracted likelihood data.

Another notable patent is related to an optical transmitter, optical receiver, and optical communication system. The optical transmitter includes a bit converter that processes input bits in units of four bits, generating an output bit sequence having eight bits based on one of three conversion tables. The symbol mapper allocates the output bit sequence to X-polarization and Y-polarization of two consecutive time slots. The bit converter performs this process such that the most significant bits and least significant bits of the output bit sequence are associated with values allocated to two constellation points on a complex plane.

Career Highlights

Keisuke Dohi is currently employed at Mitsubishi Electric Corporation, where he continues to innovate in the field of optical communication. His work has been instrumental in advancing technologies that are crucial for modern communication systems.

Collaborations

Dohi has collaborated with notable coworkers, including Tsuyoshi Yoshida and Keisuke Matsuda. Their combined expertise has contributed to the development of cutting-edge technologies in their field.

Conclusion

Keisuke Dohi is a key figure in the realm of optical communication technology, with a strong portfolio of patents that reflect his innovative spirit. His contributions continue to shape the future of communication systems, making him a significant inventor in this domain.