Company Filing History:

5 out of 208

Hitachi Denshi Kabushiki Kaisha

Hitachi-kokusai Electric Inc.

patents

4. 1 out of 3

Hitachi Denshi Kabushiki

patents

5. 1 out of 832,680

Other

patents

where one patent can have more than one assignee

Years Active: 1984-2006

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10 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7039123 - Signal demodulation method and apparatus for reproducing data from received signal (2006-05-02),

2. 6879630 - Automatic equalization circuit and receiver circuit using the same (2005-04-12),

3. 6745365 - Coder with error correction, decoder with error correction and data transmission apparatus using the coder and decoder (2004-06-01),

4. 5943374 - Out-of-synchronization recovery method and apparatus of data (1999-08-24),

5. 5579434 - Speech signal bandwidth compression and expansion apparatus, and (1996-11-26),

6. 4926499 - Carrier phase controller for a receiver of phase modulated signals (1990-05-15),

7. 4823346 - Maximum likelihood decoder (1989-04-18),

8. 4535295 - Method and device for controlling the phase of timing signal (1985-08-13),

9. 4531089 - Electric power detecting circuit and gain control circuit using the same (1985-07-23),

10. 4477913 - Automatic equalizer apparatus (1984-10-16),

Title: Yoshiro Kokuryo: Innovator in Signal Demodulation Technology

Introduction

Yoshiro Kokuryo is a prominent inventor based in Tachikawa, Japan. He has made significant contributions to the field of signal processing, particularly in the area of signal demodulation. With a total of 10 patents to his name, Kokuryo's work has had a lasting impact on the technology used in data transmission.

Latest Patents

Kokuryo's latest patents include a signal demodulation method and apparatus for reproducing data from a received signal. This innovative method involves receiving a signal that contains a series of frames, each with a training signal for automatic equalization processing and a data signal. The process includes controlling the amplitude of the received signal through Automatic Gain Control (AGC) processing, conducting demodulation processing, and periodically performing automatic equalization to adapt the modulated signal to the characteristics of the transmission path. Another notable patent is the automatic equalization circuit and receiver circuit, which focuses on demodulating a multilevel digital modulation signal. This circuit utilizes either the in-phase or quadrature component of the training signal for equalization convergence, thereby reducing the calculation amount required for processing.

Career Highlights

Throughout his career, Yoshiro Kokuryo has worked with notable companies such as Hitachi Denshi and Hitachi, Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in signal processing technology.

Collaborations

Kokuryo has collaborated with esteemed colleagues, including Naoya Kobayashi and Makoto Ohnishi. These partnerships have contributed to the advancement of his research and the successful development of his patents.

Conclusion

Yoshiro Kokuryo's contributions to signal demodulation technology exemplify his innovative spirit and dedication to advancing the field. His patents continue to influence the way data is transmitted and processed, showcasing the importance of his work in modern technology.

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