Company Filing History:
Years Active: 2014
Title: The Innovations of Bill Xenakis
Introduction
Bill Xenakis is a notable inventor based in Pleasanton, CA. He has made significant contributions to the field of communication systems. His work primarily focuses on calibration techniques that enhance the performance of receivers and transmitters.
Latest Patents
Bill Xenakis holds a patent for "Fast in-phase and quadrature imbalance calibration." This invention includes a technique to calibrate the receiver and transmitter in a communication system. N digitized samples I(n) and Q(n) are stored, representing in-phase and quadrature (I-Q) components of a down-converted signal from a receiver. The I-Q components are generated from a quadrature demodulator or modulator that has I-Q imbalance. Phase and gain adjustment constants are computed from the N digitized samples to compensate for the I-Q imbalance using a closed form solution. Another embodiment of this invention includes a technique to calibrate a transceiver in a communication system without using a calibrated reference receiver. A first test signal at a first frequency is injected into a transmitter with a quadrature modulator that has I-Q imbalance. The transmitter generates a transmitter signal, which is detected to create a composite signal containing the first test signal and a second test signal at a second frequency twice that of the first. The composite signal is digitized, and I-Q direct current (DC) offset, phase, and gain corrections are computed from the digitized composite signal to correct the I-Q imbalance using a closed form solution.
Career Highlights
Bill Xenakis is currently employed at Qualcomm Incorporated, a leading company in the telecommunications industry. His work at Qualcomm has allowed him to develop innovative solutions that address complex challenges in communication systems.
Collaborations
Throughout his career, Bill has collaborated with talented individuals such as Chaekwan Lee and Peter A Thompson. These collaborations have contributed to the advancement of technology in the field.
Conclusion
Bill Xenakis is a distinguished inventor whose work in calibration techniques has significantly impacted communication systems. His patent demonstrates his commitment to innovation and excellence in technology.