Description:
Initial Synchronization System for the LTE Sector Search Process
Princeton Docket # 16-3216-1
Researchers at Princeton in the Department of Electrical Engineering have designed a novel initial synchronization system for the LTE sector search process to provide better coverage, lower outage probability, rapid initial synchronization and rapid handover.
This invention, comprises three subsystems, takes inter-cell interference, inter-carrier interference and multipath fading into consideration with assistance from various inherent sources of diversity. The first subsystem explores inter-sector diversity to achieve the LTE frame synchronization with a long-lag differential correlator. The second subsystem exploits time diversity to jointly estimate residual timing error (RTE) and fractional frequency offset (FFO) with a short-lag differential correlator. The third subsystem exploits frequency diversity to jointly detect integral frequency offset (IFO) and sector identification (SID) with segmental frequency-domain matched filters. This system can enhance the coverage by approximately 4.7-dB signal-to-noise ratio (SNR) gain and can shorten the primary synchronization sequence (PSS) acquisition time to speed up the handover process. It can also achieve accurate timing and frequency offset estimation and sector identification (SID) by utilizing auto-correlation, cyclic-extension correlation, and differential cross-correlation.
This invention can be used in any smart phone that supports LTE and LTE-A services. Using this system, a smart phone can even work at a corner among cells or on cell edges, where inter-cell interference may be strong and SNR is low.
Applications
• Smart phone that supports LTE and LTE-A services
• Internet of things (IOT)
Advantages
• Rapid initial synchronization
• Better coverage
• Lower outage probability
• Rapid handover
Publication
Jia-Chin Lin, Yu-Ting Sun, H. Vincent Poor. Initial Synchronization Exploiting Inherent Diversity for the LTE Sector Search Process. IEEE Transactions on Wireless Communications, Vol. 15, No. 2, pp. 1114 – 1128, February 2016
Inventor
Vincent Poor is the Michael Henry Strater University Professor of Electrical Engineering at Princeton University, where his research interests are in the area of wireless networks and related fields. During 2006-16 he served as Dean of Princeton’s School of Engineering and Applied Science. He has also been involved as a consultant for a number of organizations in the wireless space, and has held visiting appointments several other institutions, including most recently at Stanford and Imperial College. Dr. Poor is a Member of the National Academy of Engineering and the National Academy of Sciences, and is a Foreign Member of the Royal Society. He is also a Fellow of the American Academy of Arts and Sciences, the National Academy of Inventors, and other national and international academies. Recent recognition of his work includes the 2014 URSI Booker Gold Medal, the 2016 John Fritz Medal, and honorary doctorates from several universities in Asia and Europe.
Jia-Chin Lin is a Full Professor in the Department of Communication Engineering, National Central University, Taiwan. He has held visiting appointments at several universities, including Stanford University and Princeton University. Dr. Lin has been serving as an Associate Editor of the IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY since 2008. He has been serving as a Technical Associate Editor of the IEEE COMMUNICATIONS MAGAZINE since 2013. He served as an Associate Editor of the IEEE SIGNAL PROCESSING LETTERS from 2011 to 2012. He served as a Guest Editor of the IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS (Special Issue on Emerging Technologies in Communications: Vehicular Networks and Telematics Applications). He served as a Guest Editor of the feature topic: Synchronization Standards towards 5G in the IEEE COMMUNICATIONS MAGAZINE. He served as a Guest Editor of the IEEE ITS Magazine and the IET Intelligent Transport Systems. Recent recognition of his work includes the Dr. Wu Da-You Research Award from the National Science Council, Executive Yuan, the Young Scientist Award by URSI, and the 2009 Ten Outstanding Young Persons Award of Taiwan.
Yu-Ting Sun received the B.S. degree in electrical engineering from the National Chi-Nan University, Taiwan, in 2005, and the M.S. and Ph.D. degrees in communication engineering from the National Central University, Taiwan, in 2007 and 2016, respectively. Her research interests include wireless transmission technologies, signal processing for communications, and synchronization techniques.
Intellectual Property & Development status
Patent protection is pending. Princeton is currently seeking commercial partners for the further development and commercialization of this opportunity.
Contact
Michael R. Tyerech
Princeton University Office of Technology Licensing • (609) 258-6762• tyerech@princeton.edu
Sangeeta Bafna
Princeton University Office of Technology Licensing • (609) 258-5579• sbafna@princeton.edu