TITLE: Comprehensive State Inference for Cognitive Radio Networks

SPEAKER: Dr. Georgios B. Giannakis

DATE and TIME: Thursday, April 30, 2015 at Noon to 1:30 PM.  Lunch will be catered by Moe’s Southwest Grill.  Lunch will be served starting at Noon.  Dr. Giannakis’s presentation will begin at 12:30 PM.

LOCATION: Georgia Tech Research Institute, 250 14th St NW, Room 119C, Atlanta, GA 30318

PARKING: Free parking is available in the parking deck next to the building.

RSVP: Please RSVP by Monday, April 27th to jim.worsham(a)att.com or brett.walkenhorst(a)gtri.gatech.edu if you plan to attend so we have an accurate count for lunch.

ABSTRACT: Spectrum sensing is a critical prerequisite in envisioned applications of wireless cognitive radio (CR) networks, which promise to resolve the perceived bandwidth scarcity versus under-utilization dilemma. This talk presents recent advances for comprehensive situation awareness at the PHY of CR networks by capitalizing on the novel notion of spatio-temporal RF cartography, which amounts to constructing two families of maps: (m1) global power spectral density maps capturing the distribution of power across space, time, and frequency; and (m2) local channel gain maps providing the propagation medium per frequency from each node to any point in space and time. Paralleling the success of routing tables, the vision is to have CR nodes jointly utilize these maps so as to enable: (v1) identification of opportunistically available spectrum bands for re-use, and handoff operation; (v2) localization, transmit-power estimation, and tracking of primary user activities; and (v3) interference control, resource allocation, and routing. If time allows, CR sensing beyond the PHY will be presented to for flagging network anomalies.

BIOGRAPHY: Georgios B. Giannakis (Fellow’97) received his Diploma in Electrical Engr. from the Ntl. Tech. Univ. of Athens, Greece, 1981. From 1982 to 1986 he was with the Univ. of Southern California (USC), where he received his MSc. in Electrical Engineering, 1983, MSc. in Mathematics, 1986, and Ph.D. in Electrical Engr., 1986. Since 1999 he has been a professor with the Univ. of Minnesota, where he now holds an ADC Chair in Wireless Telecommunications in the ECE Department, and serves as director of the Digital Technology Center. His general interests span the areas of communications, networking and statistical signal processing – subjects on which he has published more than 375 journal papers, 625 conference papers, 20 book chapters, two edited books and two research monographs (h-index 111). Current research focuses on big data analytics, wireless cognitive radios, network science with applications to social, brain, and power networks with renewables.. He is the (co-) inventor of 22 patents issued, and the (co-) recipient of 8 best paper awards from the IEEE Signal Processing (SP) and Communications Societies, including the G. Marconi Prize Paper Award in Wireless Communications. He also received Technical Achievement Awards from the SP Society (2000), from EURASIP (2005), a Young Faculty Teaching Award, the G. W. Taylor Award for Distinguished Research from the University of Minnesota, and the IEEE Fourier Technical Field Award (2015). He is a Fellow of EURASIP, and has served the IEEE in a number of posts including that of a Distinguished Lecturer for the IEEE-SP Society.



Brett Walkenhorst, Chair

Mark Jones, Vice-Chair

Reggie Ratcliff, Treasurer

Jim Worsham, Secretary

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