Company Filing History:
Years Active: 2007-2014
Title: Innovations of Yonghua Fang
Introduction
Yonghua Fang is a notable inventor based in Ottawa, Canada. He has made significant contributions to the field of telecommunications, particularly in echo cancellation systems and impedance settings for trunk lines. With a total of 4 patents to his name, Fang's work has had a considerable impact on improving communication technologies.
Latest Patents
One of Yonghua Fang's latest patents is a "System for conditioning echo response of loop start trunk line." This innovative echo canceling system utilizes an adaptive filter connected to an echo source to effectively cancel echo from an echo path. Additionally, a fixed echo conditioning filter is integrated in series with the adaptive filter, which helps in canceling the constant part of the echo path by using a measured impulse response of the echo path.
Another significant patent is the "Method for selecting impedance setting for loop start trunk line." This method involves successively applying various impedance settings to the loop start trunk line. For each setting, the impulse response of the trans-hybrid echo path is measured by applying audio test signals. This process allows for the calculation of a figure of merit based on the power spectrum, ultimately leading to the selection of the optimum impedance associated with the highest calculated figure of merit.
Career Highlights
Yonghua Fang is currently employed at Mitel Networks Corporation, where he continues to develop innovative solutions in telecommunications. His expertise in echo cancellation and impedance settings has positioned him as a valuable asset to the company.
Collaborations
Throughout his career, Yonghua Fang has collaborated with talented professionals such as Mirjana Popovic and Dieter Schulz. These collaborations have further enhanced his work and contributed to the advancements in the field.
Conclusion
Yonghua Fang's contributions to telecommunications through his patents and innovative methods demonstrate his commitment to improving communication technologies. His work continues to influence the industry and pave the way for future advancements.