Shouhei Murakami

Title: Shouhei Murakami: Innovator in Digital Predistortion Technology

Introduction

Shouhei Murakami is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of digital predistortion technology, holding a total of 6 patents. His work focuses on effectively compensating distortion in predistortion transmitters, which is crucial for enhancing communication systems.

Latest Patents

One of his latest patents involves a digital predistortion transmitter designed to address various distortion issues. This technology compensates for memory effects due to amplifier nonlinearity, as well as modulator DC offsets, IQ unbalance, and local quadrature errors. The predistortor he developed includes a polynomial basis generation portion and an inner product calculation portion. The polynomial basis generation portion delays the real and imaginary parts of a complex input signal for up to M samples, generating multiple signals that are combined to create monomials of maximum degree N. The inner product calculation portion then uses a coefficient vector to perform calculations, outputting a polynomial value as a complex signal.

Career Highlights

Shouhei Murakami has worked with prominent companies such as Hitachi, Ltd. and Hitachi Communication Technologies, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects in the field of communication technology.

Collaborations

Throughout his career, Murakami has collaborated with talented individuals, including Kazuyuki Hori and Yuji Ishida. These partnerships have fostered a creative environment that has led to advancements in their respective fields.

Conclusion

Shouhei Murakami's contributions to digital predistortion technology highlight his innovative spirit and dedication to improving communication systems. His patents and collaborations reflect a commitment to excellence in engineering and technology.