Dr. John Papandriopoulos, an Australian researcher, has announced a technique to boost broadband speeds on ordinary DSL lines by up to ten times. The Ph.D. thesis Papandriopoulos wrote at the University of Melbourne outlines an algorithm that reduces crosstalk interference on copper phone lines. Dr. Papandriopoulos will soon join the staff of Silicon Valley-based ASSIA founded by DSL pioneer John Cioffi. ADSL transmissions are hampered by two factors: the length of the line from the exchange and electromagnetic crosstalk on that line. These two impediments reduce the actual speed users encounter to well under 10 Mbits/s. Essentially, the new algorithm exploits the fact that interference varies across the frequency spectrum. With clever allocation of transmission power among the various frequency bands, interference between strongly coupled lines can be controlled. If the software using this algorithm is successful, it could be important to users around the globe since replacement of existing copper phone connections will not take place for years to come. Find more details about this research on Dr. Papandriopoulos’ website.
Aussie Researcher Says Managing Crosstalk Will Speed DSL
