Kouichi Nagano

Title: Kouichi Nagano: Innovator in Signal Processing Technologies

Introduction

Kouichi Nagano is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of signal processing, holding a total of 10 patents. His work focuses on enhancing the performance and accuracy of complex signal processing systems.

Latest Patents

One of his latest patents is an "Orthogonal Transform Error Corrector." This invention features a phase adjuster that arranges the phases of waveforms of a complex signal after orthogonal transformation. An edge detector is employed to identify the edge of the complex signal post-phase adjustment. Additionally, a phase shift detector measures the phase shift of the output signal from the edge detector between the in-phase signal and the quadrature signal after the orthogonal transform, producing a phase error signal (PE). The oscillator, which is linked to mixers and a shifter for performing the orthogonal transform, includes a phase adjustment section that modifies the edge of a voltage-controlled oscillator (VCO) clock based on the phase error signal (PE), thereby correcting the phase shift of the original signal.

Another notable patent is for a "Complex Signal Processing Circuit, Receiver Circuit, and Signal Reproduction Device." This invention utilizes an analog complex filter to combine an in-phase signal and a quadrature signal, resulting in the output of first and second analog signals. An analog-to-digital converter then transforms these analog signals into their digital counterparts. A first digital complex filter attenuates the quadrature signal component of the first digital signal, producing a third digital signal, while it also attenuates the in-phase signal component of the second digital signal, yielding a fourth digital signal. Furthermore, an IQ imbalance correction circuit rectifies any quadrature and amplitude errors between the third and fourth digital signals.

Career Highlights

Kouichi Nagano has worked with notable companies such as Matsushita Electric Industrial Co., Ltd. and Panasonic Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in signal processing technologies.

Collaborations

Throughout his career, Kouichi has collaborated with esteemed colleagues, including Hiroki Mouri and Takashi Yamamoto. These partnerships have contributed to the advancement of his inventions and the overall field of signal processing.

Conclusion

Kouichi Nagano's contributions to signal processing through his innovative patents