Naotoshi Maeda

Title: Naotoshi Maeda: Innovator in Reception Technology

Introduction

Naotoshi Maeda is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of reception technology, holding 2 patents that showcase his innovative approach to improving mobile reception performance.

Latest Patents

Maeda's latest patents include a reception device and a method for determining the velocity of the device based on a received pilot signal. This invention involves storing a channel characteristic obtained from a pilot signal for a prescribed number of symbols, performing a Fourier transform, calculating the power of each Doppler frequency component, and filtering in the time direction for each component. The invention emphasizes power changes between adjacent Doppler frequency components and generates motion information by comparing it with a predetermined decision threshold. This velocity detection method allows for high precision in detecting motion from a received signal, ultimately enhancing mobile reception performance by optimizing demodulation operations according to the velocity of motion.

Another notable patent is a scan conversion apparatus that improves vertical resolution and reduces flicker. This video scan converter features a deflickering circuit that attenuates spatial frequency components combining high vertical spatial frequency with low horizontal spatial frequency. The resulting signal is converted from progressive scanning to interlaced scanning by selecting even and odd horizontal scanning lines. The deflickering circuit can also expand a selected part of the video signal through vertical interpolation, followed by vertical low-pass filtering, with a separate horizontal interpolating circuit expanding the selected part horizontally.

Career Highlights

Throughout his career, Naotoshi Maeda has worked with notable companies such as Mitsubishi Denki Kabushiki Kaisha and Mitsubishi Electric Corporation. His experience in these organizations has contributed to his expertise in reception technology and innovation.

Collaborations

Maeda has collaborated with several talented individuals, including Sadayuki Inoue and Junji Sukeno. These collaborations have likely enriched his work and led to advancements in the technologies he has developed.

Conclusion

Naotoshi Maeda's contributions to reception technology through his patents and career achievements highlight his role as an influential inventor. His innovative solutions continue to impact the field and improve mobile reception performance.