Interference Excision in Satellite Communications


11:00 AM // JACOBS HALL (EBU1)


Prof. Larry Milstein
Roy A. Rexford Jr. PhD, Senior Technologist, SPAWAR

Radio frequency interference (RFI) is an hour-to-hour problem in commercial wideband satellite communications (SATCOM).  In fact, there are between 2 and 3 interference incidents per hour worldwide in the commercial SATCOM industry.  In response to this, there are emerging products known as interference excision devices.  There are multiple product classes, but the most promising class for general purpose use is based on adaptive filters.  Adaptive filters for noise cancellation have been around since the 1970s, but only recently have they been productized for use in the SATCOM industry.  This talk will cover ten figures-of-merit that are used by the SATCOM industry and the government to evaluate the performance of interference excision devices.  This talk ends by predicting that future SATCOM modems will need to include built-in interference excision methods in order to remain competitive in the marketplace.

Speaker Bio: 

ROY A. AXFORD, Jr., Ph.D. of Space and Naval Warfare (SPAWAR) Systems Center, Pacific (SSC Pacific) is Senior Technologist, Wireless Communications at the Space and Naval Warfare (SPAWAR) Systems Center, Pacific (SSC Pacific) in San Diego, California. He serves as a science, technology, and engineering expert to steer the development of wireless communications for the Navy and the Department of Defense. He was promoted to the rank of Senior Technologist in January 2009 and is currently in his 33rd year of federal service. Dr. Axford holds the following degrees from the University of Illinois at Urbana-Champaign: Bachelor of Science in Electrical Engineering (1977), Bachelor of Arts in Mathematics (1977), and Master of Science in Electrical Engineering (1980). He holds a Ph.D. in Electrical Engineering (1995) with a specialization in communications theory and systems from the UC San Diego.  Dr. Axford received the Department of the Navy Meritorious Civilian Service Award in 1996. He received SSC Pacific’s highest award, the Lauritsen-Bennett Award for excellence in engineering, in 2005. He received the Department of the Navy Top Scientists and Engineers of the Year Award in 2006. Dr. Axford is also the recipient of five SSC Pacific publications awards. Dr. Axford is a Senior Member of the Institute of Electrical and Electronics Engineers (IEEE).

Speaker Photo: 
Event Date: 
Monday, November 23, 2015