Company Filing History:
Years Active: 2002-2004
Title: The Innovations of Stefan Barkarö
Introduction
Stefan Barkarö is a notable inventor based in Solna, Sweden. He has made significant contributions to the field of telecommunications, particularly in DSL technology. With a total of 6 patents to his name, Barkarö's work has had a considerable impact on the industry.
Latest Patents
One of his latest patents is a "Signal level adjustment arrangement." This invention focuses on the signal level adjustment of a multitone signal received over a transmission line during a training sequence in a DSL system. It involves a programmable high-pass filter connected to the transmission line, along with a programmable gain control unit linked to an A/D converter. A digital signal processor is also integrated, which detects signal level differences and programs the filter to equalize the signal levels of the highest and lowest tones. Additionally, the processor adjusts the gain control unit to align the total signal output level with the dynamic range of the A/D converter.
Another significant patent is a "Method and an arrangement for securing an ADSL connection." This invention secures an ADSL connection between a first ADSL transceiver in a central office and a second ADSL transceiver at a subscriber's premises. It detects a request to apply a ringing signal to the telephone line and adjusts the bit rate of the ADSL connection accordingly. The system maintains a lower bit rate during an off-hook condition and switches back to the normal bit rate when the line is on-hook.
Career Highlights
Stefan Barkarö works at Telefonaktiebolaget Lm Ericsson (publ), a leading telecommunications company. His role involves developing innovative solutions that enhance the efficiency and security of ADSL connections. His expertise in signal processing and telecommunications has positioned him as a key player in the industry.
Collaborations
Throughout his career, Barkarö has collaborated with talented individuals such as Torbjörn Randahl and Albin Johansson. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies in the telecommunications sector.
Conclusion
Stefan Barkarö's contributions to telecommunications through his patents and innovations demonstrate his expertise and commitment to advancing the field. His work continues to influence the way we connect and communicate today.