John L Murphy

Title: Innovations of John L. Murphy in Digital Audio Broadcasting

Introduction

John L. Murphy is a notable inventor based in San Francisco, CA, who has made significant contributions to the field of digital audio broadcasting. With a total of 3 patents to his name, Murphy's work focuses on enhancing the quality and reliability of audio transmission through innovative methods and apparatus.

Latest Patents

Murphy's latest patents include a method and apparatus for digital audio broadcasting and reception. This invention provides a radio broadcasting system that transmits a composite signal consisting of a frequency modulated (FM) analog signal and a multicarrier modulated digital signal. The system is designed to be resistant to multipath degradation, ensuring high-quality audio reception. The FM signal and the digital multicarrier modulated signal are fully coherent, allowing for efficient signal processing. The digital signal utilizes multiple carriers with a maximum amplitude significantly lower than the unmodulated FM signal, which aids in reliable signal acquisition and coherent detection.

Career Highlights

Murphy is currently associated with USA Digital Radio, Inc., where he continues to develop innovative solutions in the realm of digital audio technology. His expertise in the field has positioned him as a key player in advancing audio broadcasting systems.

Collaborations

Murphy collaborates with Mark J. Rich, working together to push the boundaries of digital audio technology and improve broadcasting methods.

Conclusion

John L. Murphy's contributions to digital audio broadcasting exemplify the impact of innovation in enhancing communication technologies. His patents reflect a commitment to improving audio quality and reliability in broadcasting systems.