Company Filing History:
Years Active: 2000-2007
Title: Don L. Harmer: Innovator in DSL Technology
Introduction
Don L. Harmer is a notable inventor based in Anaheim, CA, who has made significant contributions to the field of digital subscriber line (DSL) communication systems. With a total of 3 patents to his name, Harmer has focused on innovations that enhance the efficiency and performance of DSL technology.
Latest Patents
Harmer's latest patents include groundbreaking work in modulation switching for DSL signal transmission. This invention allows a DSL communication system to utilize the high-frequency band of a standard telephone line without requiring a plain old telephone service (POTS) splitter in the resident's home. The system employs constant envelope modulation or quadrature amplitude modulation to optimize DSL signals. When a telephone is detected as off-hook, constant envelope modulation is used to reduce intermodulation product distortion, thereby minimizing audible noise for the user. Conversely, when the telephone is on-hook, QAM is employed to maximize upstream data rates, as any noise generated is not an issue due to the non-use of the POTS frequency band.
Another significant patent by Harmer is focused on constant envelope modulation for splitterless DSL transmission. This innovation also eliminates the need for a POTS splitter by utilizing digital signal processing techniques that adapt to varying subscriber line conditions. The techniques reduce susceptibility to distortion caused by the characteristics of the subscriber line, ensuring a clearer communication experience.
Career Highlights
Don L. Harmer has worked at Conexant Systems, Inc., where he has been instrumental in developing advanced DSL technologies. His work has contributed to the evolution of communication systems, making them more efficient and user-friendly.
Collaborations
Throughout his career, Harmer has collaborated with notable colleagues, including Kenneth David Ko and David O. Anderton. These partnerships have fostered innovation and have played a crucial role in the development of his patented technologies.
Conclusion
Don L. Harmer's contributions to DSL technology have significantly impacted the way we communicate today. His innovative patents demonstrate a commitment to enhancing communication systems, making them more efficient and accessible for users.