Donald Lars Duttweiler

Title: Donald Lars Duttweiler: A Pioneer in Echo Cancellation Technology

Introduction

Donald Lars Duttweiler is a noteworthy inventor based in Rumson, NJ, who has made significant contributions to the field of echo cancellation technology. With a total of 27 patents registered to his name, Duttweiler's work has had a profound impact on telecommunications and data applications.

Latest Patents

Duttweiler's latest patents include innovative technologies that enhance the performance of echo cancelers. One of his key inventions is the "Quadrature Filter Augmentation of Echo Canceler Basis Functions." This patent describes an echo canceler that incorporates conventional tapped delay line basis functions, augmented with at least one pair of basis functions that achieve two quadrature responses of a complex pole. The selection of this pole frequency is crucial, as it aligns closely with the dominant pole of a highpass filter in the echo path of the echo canceler, resulting in significant improvements in echo-return-loss enhancement (ERLE).

Another notable patent is "Echo Cancellation in the Network for Data Applications." This invention introduces a network-based CODEC (coder-decoder) that features an echo canceler capable of recognizing data calls by identifying predefined signaling portions of a modem handshaking process. For each detected data call, the CODEC utilizes a stored channel model for effective echo cancellation. The unique aspect of this innovation is its off-line training during specific segments of the modem call, enabling it to store and apply new channel models for future data calls.

Career Highlights

Duttweiler's professional journey includes working with prestigious organizations such as AT&T Bell Laboratories and Lucent Technologies Inc.! His experiences at these companies have allowed him to develop and refine his inventions, contributing to advances in communication technologies.

Collaborations

Throughout his career, Duttweiler has collaborated with several brilliant minds, including Christodoulos Chamzas and John Hartung. These collaborations have fostered a rich environment for innovation and have played a crucial role in the development of his groundbreaking technologies.

Conclusion

Donald Lars Duttweiler's extensive work in the realm of echo cancellation exemplifies the essence of innovation in telecommunications. His patents serve as testaments to his ingenuity and dedication to improving communication systems, solidifying his status as a prominent inventor in this specialized field.