Company Filing History:
Years Active: 2014-2017
Title: Innovations of Jianxun Fan
Introduction
Jianxun Fan is a notable inventor based in Apex, NC (US). He has made significant contributions to the field of technology, particularly in the area of transmitter calibration and error correction. With a total of 4 patents to his name, his work has had a considerable impact on communication systems.
Latest Patents
One of Jianxun Fan's latest patents is the "Transmitter LO leakage calibration scheme using loopback circuitry." This invention provides a method and apparatus for estimating and compensating TX LO leakage using circuitry on a loopback path connecting the transmitter and receiver. The TX LO leakage can be estimated by measuring the DC signal on the receiver, measuring the phase difference between the received LO signal and the receiver LO signal, and filtering LO harmonics that may arise from the use of non-linear mixers. The method may be utilized in an initialization or tracking calibration scheme.
Another significant patent is the "Wideband quadrature error correction." This transmission module includes a transmitter, a loopback receiver, and a QEC controller. In the first state, the QEC controller calibrates the loopback receiver to remove quadrature imbalance. In the second state, a communication pathway is established between the transmitter and the loopback receiver, allowing the QEC controller to identify quadrature imbalance in the transmitter based on a comparison of data signals.
Career Highlights
Jianxun Fan is currently employed at Analog Devices, Inc., where he continues to innovate and develop advanced technologies. His work has been instrumental in enhancing the performance of communication systems.
Collaborations
Jianxun has collaborated with notable colleagues such as Steven R Bal and David J Mclaurin, contributing to various projects and advancements in technology.
Conclusion
Jianxun Fan's contributions to the field of technology through his patents and collaborations highlight his role as an influential inventor. His work continues to shape the future of communication systems and technology.