Chang-hyun Baik

Title: Chang-hyun Baik: Innovator in Communication Technologies

Introduction

Chang-hyun Baik is a notable inventor based in Suwon-si, South Korea. He has made significant contributions to the field of communication technologies, particularly in the areas of quadrature amplitude modulation and noise cancellation in voice signals. With a total of 3 patents, his work has had a considerable impact on electronic communication systems.

Latest Patents

One of his latest patents is a "Method and apparatus for mapping quadrature amplitude modulation symbol." This invention includes a frequency checker that verifies the frequencies of sub-carriers in an orthogonal frequency division multiplexing (OFDM) symbol. Additionally, a data categorizer maps data coded for error correction and uncoded data to the sub-carriers based on the checked frequencies. This innovative approach allows for the effective mapping of a combination of coded and uncoded data with respect to sub-carriers that have frequencies lower than a reference frequency.

Another significant patent is the "Apparatus and method for canceling noise of voice signal in electronic apparatus." This invention provides a solution for canceling noise in voice signals using a Generalized Sidelobe Canceller (GSC) and a decision unit. The GSC effectively cancels noise components from signals with different phases that are input via multiple microphones. The decision unit estimates the Signal-to-Noise Ratio (SNR) of the input signal to determine the step-size of a filter included in the GSC.

Career Highlights

Chang-hyun Baik has worked with prominent organizations such as Samsung Electronics Co., Ltd. and Sungkyunkwan University. His experience in these institutions has allowed him to develop and refine his innovative ideas in communication technologies.

Collaborations

Throughout his career, Chang-hyun Baik has collaborated with talented individuals, including Hyun-jung Ko and Jun-Yeub Lee. These collaborations have contributed to the advancement of his research and inventions.

Conclusion

Chang-hyun Baik is a distinguished inventor whose work in communication technologies has led to valuable patents and innovations. His contributions continue to influence the field and enhance electronic communication systems.