Jyun-chen Chen

Title: Innovations of Jyun-chen Chen in Digital Modulation

Introduction

Jyun-chen Chen is an accomplished inventor based in Chapel Hill, NC (US). He has made significant contributions to the field of digital modulation, particularly in the area of continuous phase modulation (CPM) signals. His innovative approach focuses on enhancing the efficiency of signal transmission while minimizing interference.

Latest Patents

Jyun-chen Chen holds a patent for a "Digital modulation method with controlled envelope variation." This invention addresses the challenges associated with filtering CPM signals, such as quaternary CPFSK signals. By designing a modulation filter, specifically a finite impulse response (FIR) filter, he has managed to limit bandwidth while controlling amplitude modulation and intersymbol interference. This advancement allows for the use of high-efficiency, nonlinear power amplifiers in transmitting filtered CPFSK signals. Although some amplitude modulation and intersymbol interference are introduced, digital signal processor-based receivers can effectively demodulate these signals using sequence estimation algorithms like the Viterbi algorithm. The result is a narrowed bandwidth that is particularly advantageous for narrowband mobile radio communications.

Career Highlights

Jyun-chen Chen is currently associated with Ericsson GmbH, where he continues to work on innovative solutions in telecommunications. His expertise in digital modulation has positioned him as a valuable asset in the industry.

Collaborations

One of his notable collaborators is Ross W Lampe, Jr. Together, they have contributed to advancements in digital signal processing and telecommunications.

Conclusion

Jyun-chen Chen's work in digital modulation exemplifies the intersection of innovation and practical application in telecommunications. His patent demonstrates a significant step forward in managing signal transmission efficiency and interference.