Yoshihiro Ishikawa

This inventor holds 51 USPTO granted patents and 6 published patent applications, plus 1 CIPO patent and 12 EPO patents, primarily in Mobile Communication Systems (CPC class 4551). Top assignees: Ntt Docomo, Inc., Ntt Mobile Communications Network, Inc., Fujifilm Corporation. Active years: 1997-2013.

USPTO Granted Patents = 51 (Patent Applications = 6)

% Patents Active = 37.3

CIPO Patents = 1 (Patent Applications = 1)

EPO Patents = 12 (Patent Applications = 3)

Average Co-Inventor Count = 2.9

ph-index = 10

Forward Citations = 534(Granted Patents)

Forward Citations (Not Self Cited) = 521(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Yokohamashi, JP (1997 - 1998)
Yokosuka-shi, JP (2007)
Kanagawa-ken, JP (2004 - 2009)
Kanagawa, JP (2002 - 2012)
Yokosuka, JP (2005 - 2013)

Company Filing History:

Ntt Mobile Communications Network, Inc.

Years Active: 1997-2013

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Areas of Expertise:

Mobile Communication

Transmission Power Control

Call Admission Control

Quality Measurement

Channel Estimation

Handover Control

Base Station

Wireless Communication

Traffic Measurement

Communication Performance

CDMA Systems

Radio Control

51 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8583124 - Base station and mobile communication method to change a transmission power of communication channel (2013-11-12),

2. 8582691 - Receiving apparatus and receiving method (2013-11-12),

3. 8483331 - Receiving device and radio quality calculation method (2013-07-09),

4. 8295332 - Channel estimation device and method, demodulation device and method, and fading frequency decision device and method (2012-10-23),

5. 8055202 - Measuring apparatus and area quality measuring method (2011-11-08),

6. 7929592 - Channel estimation device and method, demodulation device and method, and fading frequency decision device and method (2011-04-19),

7. 7701906 - Mobile station, mobile communication system, handover control method, handover control program and recording medium (2010-04-20),

8. 7693106 - Neighboring base station information update method, information management method for cell search in mobile communications system, cell search method of mobile station, mobile communications system, mobile station, base station and control station (2010-04-06),

9. 7649859 - Channel identifier assigning method and mobile communications system (2010-01-19),

10. 7545790 - Apparatus and method for acquisition of communication quality (2009-06-09),

11. 7507983 - Radiation image information reading apparatus (2009-03-24),

12. 7492784 - Call acceptance control method, mobile communication system and base station device (2009-02-17),

13. 7492721 - Traffic measurement device and traffic measurement method (2009-02-17),

14. 7449709 - Apparatus for and method of reading and erasing radiation image information (2008-11-11),

15. 7437152 - Control method of searching neighboring cells, mobile station, and mobile, communication system (2008-10-14),

Title: **Yoshihiro Ishikawa: Innovator in Mobile Communication Technology**

Introduction

Yoshihiro Ishikawa is an accomplished inventor based in Yokosuka, Japan, known for his significant contributions to the field of mobile communication technology. With a remarkable portfolio of 51 patents, Ishikawa has advanced innovative methods and apparatuses that facilitate seamless communication.

Latest Patents

Among Ishikawa's latest patents is a groundbreaking design for a receiving apparatus and method. This invention allows for the efficient reception of downlink signals with discontinuous pilot symbols. The apparatus includes several key components: a unit for extracting reference signals, a signal generation unit that employs inverse Fourier transform techniques, and a functionality to calculate received power based on generated signals.

Another noteworthy patent is for a femto base station designed to optimize transmission power of communication channels. This invention includes a downlink perch channel signal transmission power controller that adjusts transmission power based on specific conditions, as well as an uplink reception sensitivity controller to enhance performance.

Career Highlights

Yoshihiro Ishikawa has made substantial contributions while working for prominent companies in the telecommunications industry, including NTT Docomo, Inc. and NTT Mobile Communications Network, Inc. His work in these organizations has positioned him as a leader in innovating practical solutions to address the ever-evolving demands of mobile communication.

Collaborations

Throughout his career, Ishikawa has collaborated with notable colleagues such as Seizo Onoe and Mikio Iwamura. These partnerships have played a crucial role in the development of pioneering technologies and have fostered a creative environment that encourages the exchange of ideas.

Conclusion

Yoshihiro Ishikawa's dedication to innovation in telecommunications is evident in his extensive patent portfolio and his influential role in leading industry advancements. His inventions not only enhance communication technology but also pave the way for future innovations in the field. As he continues to push the boundaries of what is possible, Ishikawa remains an inspirational figure in the world of inventors.