Company Filing History:
Years Active: 2003
Title: The Innovative Contributions of Tetsu Sakata in Coherent Detection Systems
Introduction: Tetsu Sakata, an inventor based in Kanagawa, Japan, has made significant strides in the field of communication technology. With a focus on enhancing the performance of multicarrier modulation systems, Sakata's work is characterized by his innovative approach to addressing challenges posed by severe environmental conditions.
Latest Patents: Sakata holds a notable patent for a coherent detection system specifically designed for multicarrier modulation. This system is capable of accurate channel estimation even in challenging environments characterized by high thermal noise and deep multipath fading. His invention includes a simple structure and compact circuit design, which contributes to its efficiency and effectiveness.
The coherent detection system comprises several key components: a channel estimation circuit that assesses channel attenuation from the preamble part of each subcarrier, an adaptive filter that smooths the estimated channel attenuation across subcarriers, and a divider that performs coherent detection of data by dividing a receive vector by the smoothed estimated channel attenuation for each subcarrier. Additionally, a characteristic extraction circuit is utilized to derive characteristic values of each subcarrier, which are crucial for the adaptive filter's control process.
Career Highlights: Tetsu Sakata’s work at Nippon Telegraph and Telephone Corporation has positioned him as a pivotal figure in developing advanced communication technologies. His patent addresses critical issues in real-world applications, thereby enhancing the reliability and performance of communication systems under adverse conditions.
Collaborations: Throughout his career, Sakata has collaborated with fellow innovators, including Takeshi Onizawa and Masato Mizoguchi. These partnerships have fostered an environment of creative problem-solving and technological advancement.
Conclusion: Tetsu Sakata's contributions to the field of coherent detection systems represent a significant advancement in multicarrier modulation technologies. His innovative solutions have great potential to enhance communication systems' reliability, making him a noteworthy inventor in this specialized domain.
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