Joon Ho Cho

Title: Joon Ho Cho: Innovator in Optical Communication Technologies

Introduction

Joon Ho Cho is a prominent inventor based in Holmdel, NJ (US), known for his significant contributions to the field of optical communication technologies. With a total of 7 patents to his name, Cho has developed innovative solutions that enhance the performance of communication systems.

Latest Patents

One of his latest patents is titled "Multi-stage probabilistic signal shaping." This invention features a shaping encoder that improves the performance of probabilistic coding schemes in nonlinear optical channels by implementing the shaping process in two or more stages. The first stage utilizes a shaping code with a relatively short block length, which is advantageous for nonlinear optical channels but may incur energy efficiency penalties. The second stage employs a shaping code with a much larger block length, effectively mitigating the penalties associated with the first stage while also performing well in linear optical channels. This shaping encoder is designed to have low circuit-implementation complexity and cost, while providing high energy efficiency and shaping gain across various optical channels, including legacy dispersion-managed fiber-optic links.

Another notable patent is "Probabilistic signal shaping using multiple codebooks." This invention describes a communication system that employs multiple shaping codes in a selective and iterative manner to encode data frames. By doing so, it minimizes energy inefficiencies that may arise from using constant-probability codes or transmitting dummy constellation symbols. The shaping codes utilized have different code rates, and a code selector adapts the selection of shaping codes to match the effective rate required for efficient encoding. This approach allows the shaping decoder to accurately determine the codes used for each data frame, based on the same rate-matching criteria. The embodiments of this invention are also designed to be implemented with circuits of relatively low complexity.

Career Highlights

Throughout his career, Joon Ho Cho has worked with notable companies, including Nokia Solutions and Networks and Nokia Technologies. His experience in these organizations has allowed him to contribute to advancements in communication technologies.

Collaborations

Cho has collaborated with esteemed professionals in the field, including Peter Johannes Winzer and Roland Ryf. These collaborations have further enriched his work and innovations in optical communication.

Conclusion

Joon Ho Cho's innovative patents and contributions to optical communication technologies demonstrate his expertise and commitment to advancing the field. His work continues to influence the development of efficient communication systems.