Location History:
- Tottori, JP (1991)
- Gifu, JP (1992 - 1995)
Company Filing History:
5 out of 8,780 
5 out of 143 Years Active: 1991-1995
Title: Akio Kosaka: Innovator in Digital Modulation Technologies
Introduction
Akio Kosaka is a notable inventor based in Gifu, Japan. He has made significant contributions to the field of digital modulation technologies, holding a total of 5 patents. His work primarily focuses on enhancing the efficiency and performance of digital signal processing.
Latest Patents
Among his latest patents, the "Baseband Signal Generator for Digital Modulator" stands out. This invention performs differential encoding and mapping processings for a digital baseband signal. It limits the bandwidths of the obtained symbol mapping data of an I phase and a Q phase using digital filters. Each digital filter includes a circuit for accumulating symbol mapping data corresponding to multiple symbol sections, a plurality of ROMs for storing symbol data, and an adder for outputting a digital baseband signal. This signal is then converted into an analog baseband signal by a D/A converter and supplied to an analog modulation unit.
Another significant patent is the "Digital DQPSK Modulator." This invention limits the respective bands of symbol mapping data of the I phase and Q phase. It applies differential encoding and mapping processings to a digital baseband signal and multiplies the obtained data by carrier signals using a digital filter. The digital filter accumulates symbol mapping data for each phase and includes ROMs for storing multiplication results. The adder outputs a digital modulated signal, which is converted into an analog modulated signal by a D/A converter.
Career Highlights
Akio Kosaka has worked with prominent companies such as Sanyo Electric Co., Ltd. and Tottori Sanyo Electric Co., Ltd. His experience in these organizations has contributed to his expertise in digital modulation technologies.
Collaborations
Throughout his career, Akio has collaborated with talented individuals, including Toshinori Iinuma and Mitsufumi Yoshimoto. These collaborations have likely enriched his work and led to innovative advancements in his field.
Conclusion
Akio Kosaka is a distinguished inventor whose contributions to digital modulation technologies have made a significant impact. His patents reflect his commitment to advancing the field and improving digital signal processing techniques.