Company Filing History:
Years Active: 2008-2013
Title: Kunifusa Maruyama: Innovating in Wireless Communication Technology
Introduction
Kunifusa Maruyama is a distinguished inventor based in Tokyo, Japan, known for his contributions to the field of wireless communication technology. With a portfolio of three patents, Maruyama has made significant strides in enhancing communication systems, particularly in MIMO (Multiple Input Multiple Output) technology. His innovative work at NEC Corporation highlights his dedication to advancing telecommunications.
Latest Patents
One of Maruyama's latest patents is for a **MIMO receiving apparatus and method**. This patent involves a coherent bandwidth calculation unit that determines the coherent bandwidth based on the channel response in the time domain, as received from signals for each path between transmitting and receiving antennas. Additionally, he has developed a weight calculation control unit that identifies target subcarriers for equalization weight calculation based on determined coherent bandwidth, alongside a weight calculation unit that computes the equalization weight for these subcarriers. Furthermore, a weight interpolation unit is included to perform interpolation processing to derive equalization weights for subcarriers that haven’t undergone weight calculation.
Another significant patent from Maruyama is a **Radio communication system**. In this patent, a base station is designed to generate a dummy pattern infused with error correction codes during instances when a control channel is not designated for transmitting control information. It transmits this dummy pattern at a reduced power level compared to normal transmission. A mobile station then decodes the control information sent via the control channel, assesses the validity of the information, and executes error detection. If the decoded value is deemed unsuitable or an error is detected, the mobile station halts the decoding of data from the data channel.
Career Highlights
Throughout his career at NEC Corporation, Kunifusa Maruyama has remained at the forefront of innovation within wireless communications. His expertise in signal processing and channel management has led to advancements that benefit various applications in modern telecommunications. His role within the company emphasizes collaborative technology development and consistent enhancement of communication standards.
Collaborations
Maruyama has worked alongside talented individuals such as Masato Shiokawa and Masayuki Kimata. Their combined efforts have contributed to the successful development of various innovative projects that continue to shape the telecommunications landscape.
Conclusion
Kunifusa Maruyama's dedication to innovation in wireless technology is reflected in his patents and collaborative work at NEC Corporation. His advancements in MIMO technology and radio communication systems are essential contributions that address the evolving needs of modern communication. As technology continues to advance, inventors like Maruyama play a crucial role in shaping the future of telecommunications.