University of California, Riverside

Department of Electrical and Computer Engineering



Colloquium Speaker: Professor Danijela Cabric presents a talk on "Localization in Cognitive Radio Networks"


Colloquium Speaker: Professor Danijela Cabric presents a talk on "Localization....
 
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Colloquium Speaker: Professor Danijela Cabric presents a talk on "Localization in Cognitive Radio Networks"

April 3, 2017 - 11:10 am
Winston Chung Hall, 205/206

ABSTRACT

Cognitive Radio (CR) is a promising approach to efficiently utilize the scarce RF spectrum resource. In this paradigm, knowledge about spectrum occupancy in time, frequency, and space that is both accurate and timely is crucial in allowing CR networks to opportunistically use the spectrum, and avoid interference to a primary user (PU). In particular, information about PU location will enable several key capabilities in CR networks including improved spatio-temporal spectrum sensing, intelligent location-aware power control and routing, as well as aiding security and spectrum policy enforcement.

The PU localization problem in CR networks is in general different from localization in other applications such as Wireless Sensor Networks (WSN) and Global Positioning System (GPS), due to the following two features.  First, a PU does not cooperate or communicate with CRs since they are opportunistic users of the PU spectrum band. Therefore, very limited knowledge about PU signaling, such as transmit power, modulation scheme and synchronization, is available to CRs. Second, since CRs need to detect and localize PUs in the entire coverage area at a very low signal-to-noise ratio (SNR), cooperation among a large number of CRs is necessary, which introduces important accuracy and complexity constraints.

In this talk, we will explore a set of CR cooperative localization algorithms for single and multiple PUs using different antenna configurations and available measurements, and analyze their cost performance trade-offs both theoretically and experimentally.

BIOGRAPHY

Danijela Cabric received the Dipl. Ing. degree from the University of Belgrade, Serbia, in 1998, and the M.Sc. degree in electrical engineering from the University of California, Los Angeles, in 2001. She received her Ph.D. degree in electrical engineering from the University of California, Berkeley, in 2007, where she was a member of the Berkeley Wireless Research Center. In 2008, she joined the faculty of the Electrical Engineering Department at the University of California, Los Angeles, where she is now Associate Professor. Dr. Cabric received the Samueli Fellowship in 2008, the Okawa Foundation Research Grant in 2009, Hellman Fellowship in 2012 and the National Science Foundation Faculty Early Career Development (CAREER) Award in 2012. She served as an Associate Editor in IEEE Journal on Selected Areas in Communications (Cognitive Radio series) and IEEE Communications Letters, and TPC Co-Chair of 8th International Conference on Cognitive Radio Oriented Wireless Networks (CROWNCOM) 2013. She is now Associated Editor of IEEE Transactions of Cognitive Communications and Networking. Her research interests include novel radio architecture, signal processing, and networking techniques for cognitive radio, 5G and massive MIMO systems.



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Electrical and Computer Engineering
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