Georgios B. Giannakis (born 27 February 1958) is a Greek-American Computer Scientist, engineer and inventor. He has been an Endowed Chair Professor of Wireless Telecommunications, he was Director of the Digital Technology Center, and at present he is a McKnight Presidential Chair with the Department of Electrical and Computer Engineering at the

University of Minnesota The University of Minnesota, formally the University of Minnesota, Twin Cities, (UMN Twin Cities, the U of M, or Minnesota) is a public university, public Land-grant university, land-grant research university in the Minneapolis–Saint Paul, Tw ...

. Giannakis is internationally known for his work in the areas of

statistical signal processing Signal processing is an electrical engineering subfield that focuses on analyzing, modifying and synthesizing ''signals'', such as sound, images, and scientific measurements. Signal processing techniques are used to optimize transmissions, di ...

, distributed estimation using

sensor networks Wireless sensor networks (WSNs) refer to networks of spatially dispersed and dedicated sensors that monitor and record the physical conditions of the environment and forward the collected data to a central location. WSNs can measure environmental c ...

wireless communications Wireless communication (or just wireless, when the context allows) is the transfer of information between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most ...

and cross-layer network designs, on topics such as auto-regressive moving average system identification using

higher-order statistics In statistics, the term higher-order statistics (HOS) refers to functions which use the third or higher power of a sample, as opposed to more conventional techniques of lower-order statistics, which use constant, linear, and quadratic terms (zer ...

, principal component

filter bank In signal processing, a filter bank (or filterbank) is an array of bandpass filters that separates the input signal into multiple components, each one carrying a single frequency Sub-band coding, sub-band of the original signal. One application of ...

s, linear precoding, multicarrier modulation,

ultra-wideband Ultra-wideband (UWB, ultra wideband, ultra-wide band and ultraband) is a radio technology that can use a very low energy level for short-range, high-bandwidth communications over a large portion of the radio spectrum. UWB has traditional applicati ...

communications,

cognitive radio A cognitive radio (CR) is a radio that can be programmed and configured dynamically to use the best wireless channels in its vicinity to avoid user interference and congestion. Such a radio automatically detects available channels in wireless spe ...

s, and

smart grid A smart grid is an electrical grid which includes a variety of operation and energy measures including: *Advanced metering infrastructure (of which smart meters are a generic name for any utility side device even if it is more capable e.g. a f ...

s. Seminal work includes the development of linear precoding wireless communication systems, which provided a unified approach for designing

space–time block code In physics, spacetime is a mathematical model that combines the three dimensions of space and one dimension of time into a single four-dimensional manifold. Spacetime diagrams can be used to visualize relativistic effects, such as why differen ...

s that achieve data high rates and reliability, and proposal of zero-padding as an alternative to the

cyclic prefix In telecommunications, the term cyclic prefix refers to the prefixing of a symbol, with a repetition of the end. The receiver is typically configured to discard the cyclic prefix samples, but the cyclic prefix serves two purposes: * It provides a ...

for multi-carrier communication systems, which had impact in the multi-band ultra wide band standard. Current research focuses on

big data Though used sometimes loosely partly because of a lack of formal definition, the interpretation that seems to best describe Big data is the one associated with large body of information that we could not comprehend when used only in smaller am ...

, graph learning, and

network science Network science is an academic field which studies complex networks such as telecommunication networks, computer networks, biological networks, cognitive and semantic networks, and social networks, considering distinct elements or actors repre ...

with applications to social, brain and power networks with

renewables Renewable energy is energy that is collected from renewable resources that are naturally replenished on a human timescale. It includes sources such as sunlight, wind, the movement of water, and geothermal heat. Although most renewable energy ...

. Giannakis has left a substantial academic legacy as an advisor of more than 58 Ph.D. dissertations and mentor of more than 26

postdoctoral researcher A postdoctoral fellow, postdoctoral researcher, or simply postdoc, is a person professionally conducting research after the completion of their doctoral studies (typically a PhD). The ultimate goal of a postdoctoral research position is to p ...

s at the

University of Virginia The University of Virginia (UVA) is a Public university#United States, public research university in Charlottesville, Virginia. Founded in 1819 by Thomas Jefferson, the university is ranked among the top academic institutions in the United S ...

and the

Early life

Born in

Piraeus Piraeus ( ; el, Πειραιάς ; grc, Πειραιεύς ) is a port city within the Athens urban area ("Greater Athens"), in the Attica region of Greece. It is located southwest of Athens' city centre, along the east coast of the Saronic ...

and raised in

Corinth Corinth ( ; el, Κόρινθος, Kórinthos, ) is the successor to an ancient city, and is a former municipality in Corinthia, Peloponnese, which is located in south-central Greece. Since the 2011 local government reform, it has been part o ...

, Greece, Giannakis received his MEng in Electrical and Mechanical Engineering from the

National Technical University of Athens The National (Metsovian) Technical University of Athens (NTUA; el, Εθνικό Μετσόβιο Πολυτεχνείο, ''National Metsovian Polytechnic''), sometimes known as Athens Polytechnic, is among the oldest higher education institution ...

in 1981, his M.Sc. in electrical engineering from the

University of Southern California The University of Southern California (USC, SC, or Southern Cal) is a Private university, private research university in Los Angeles, California, United States. Founded in 1880 by Robert M. Widney, it is the oldest private research university in C ...

in 1983, his M.Sc. in mathematics from the

in 1986, and his PhD in Electrical Engineering from the

also in 1986.Georgios B. Giannakis
degrees at umn.edu. Accessed September 5, 2013 After completing his Ph.D., he started his academic career at the

in 1987 and moved to the

in 1999. As a professor, he built a distinguished research group making contributions in many areas including

, sensor and mobile ad hoc networks and

data analytics Analytics is the systematic computational analysis of data or statistics. It is used for the discovery, interpretation, and communication of meaningful patterns in data. It also entails applying data patterns toward effective decision-making. It ...

Awards and honors

In 2021, Giannakis became a corresponding member of the Academy of Athens, Greece. In 2020, he was inducted as International Member of

Academia Europaea The Academia Europaea is a pan-European Academy of Humanities, Letters, Law, and Sciences. The Academia was founded in 1988 as a functioning Europe-wide Academy that encompasses all fields of scholarly inquiry. It acts as co-ordinator of Europea ...

. In the same year, he won the

European Association for Signal Processing The European Association for Signal Processing (EURASIP) is an international scientific society for the theory and application of signal processing. It was established on the 1st of September 1978.It hosts the European Signal Processing Conference ( ...

(

EURASIP The European Association for Signal Processing (EURASIP) is an international scientific society for the theory and application of signal processing. It was established on the 1st of September 1978.It hosts the European Signal Processing Conference ( ...

) "Athanasios Papoulis," Society Award, and was elected Fellow of the

European Academy of Sciences European, or Europeans, or Europeneans, may refer to: In general * ''European'', an adjective referring to something of, from, or related to Europe ** Ethnic groups in Europe ** Demographics of Europe ** European cuisine, the cuisines of Europe ...

. In 2019, he was the winner of the Institute for Electrical and Electronics Engineers (

IEEE The Institute of Electrical and Electronics Engineers (IEEE) is a 501(c)(3) professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operation ...

) Signal Processing "Norbert Wiener" Society Award; he was also named Fellow of the US

National Academy of Inventors The National Academy of Inventors (NAI) is a US non-profit organization dedicated to encouraging inventors in academia, following the model of the National Academies of the United States. It was founded at the University of South Florida in 2010. ...

( NAI); and won the IEEE Communications Society Education Award. In 2018, he received honorary doctorate degrees from the University of Patras, and the University of Peloponnese, Greece. In 2016, 2017 and 2018, he was honored as distinguished professor respectively at Zhejiang University, BIT, and Fudan University, China. In 2016, Giannakis was appointed to the prestigious McKnight Presidential Endowed Chair at the University of Minnesota.; and from 2001 to 2008 he held the Endowed Chair in Wireless Telecommunications at the U. of Minnesota. In 2015, Giannakis became the inaugural recipient of the IEEE Technical Field Fourier Award for Signal Processing. From 2012 to 2017, he served as member of the Board of Regents,

University of Patras The University of Patras (UPatras; el, Πανεπιστήμιο Πατρών, ''Panepistímio Patrón'') is a public university in Patras, Greece. It is the third-largest university in Greece with respect to the size of the student body, the s ...

, Greece. In 2008, Giannakis became Fellow of

, and in 2005 he received EURASIP's Technical Achievement Award. Earlier in 1997, he became

Fellow of the IEEE The Institute of Electrical and Electronics Engineers (IEEE) is a 501(c)(3) professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operation ...

, and in 2000 he received the Technical Achievement Award from the

IEEE Signal Processing Society The IEEE Signal Processing Society (IEEE SPS) is one of the nearly 40 technical societies of the Institute of Electrical and Electronics Engineers (IEEE) and the first one created. Its mission is to "advance and disseminate state-of-the-art scien ...

. Giannakis is listed in the top 20 of '' ISI’s Highly Cited Researchers in ECE and Computer Science.'' His publications have received more than 87,000 citations with h-index=155. In Thomson Reuters "World’s Most Influential Scientific Minds" he ranks at the top 300 from all fields of Engineering, Informatics, and Computer Science. Giannakis is also a co-author of ten best journal paper awards including the IEEE Communications Society'
Gugliermo Marconi Prize Paper Award
for work on linear precoding, the 2003 IEEE Signal Processing Society's SP Magazine Best Paper Award for a paper on wireless multicarrier communication, an IEEE Signal Processing Society'
Best Paper Award
in 2001 for work on parallel factor analysis in sensor array processing, an IEEE Signal Processing Society'
Best Paper Award
2000 for work on designing filterbank precoders and equalizers.

Invention and commercialization

Giannakis has 34 US and foreign patents issued in the fields of wireless communications (several related to the 4G LTE standard), cognitive radio sensing, signal processing, power system monitoring, and photovoltaic inverters in residential power distribution. Through those he became a fellow of the US National Academy of Inventors, `…the highest professional distinction accorded to academic inventors who have demonstrated a prolific spirit of innovation…’ Multiple lawsuits were filed by the University of Minnesota against Sprint, T-Mobile, Verizon, and AT&T based on Giannakis’ patents.

Selected books and book chapters

* G. B. Giannakis, Y. Hua, P. Stoica, L. Tong, Editors, Signal Processing Advances in Wireless and Mobile Communications, Vol. 1: Trends in Channel Est. and Equalization, Prentice Hall, 2000. * G. B. Giannakis, Y. Hua, P. Stoica, L. Tong, Editors, Signal Processing Advances in Wireless and Mobile Communications, Vol. 2: Trends in Single- and Multi-User Systems, Prentice Hall, Inc., 2000. * G. B. Giannakis, Z. Liu, X. Ma, and S. Zhou, Space-Time Coding for Broadband Wireless Communications, John Wiley & Sons, Inc., 2007. * V. Kekatos, G. Wang, H. Zhu, and G. B. Giannakis, "PSSE redux: Convex relaxation, decentralized, robust, and dynamic approaches", Chapter in Advances in Electric Power and Energy; M. El-Hawary Editor, 2018. * G. Mateos and G. B. Giannakis, "Robust PCA by controlling sparsity in model residuals", Chapter in T. Bouwmans, E. Zahzah, and N. Aybat, Editors, CRC Press, 2017. * G. B. Giannakis, G. Mateos, I. D. Schizas, H. Zhu, and Q. Ling, "Decentralized learning for wireless communications and networking", Chapter in Splitting Methods... by R. Glowinski, S. Osher, and W. Yin, Editors, NY, Springer, 2016. * X. Ma and G. B. Giannakis, "Communicating over Wireless Doubly-Selective Channels", Chapter in Space-Time Wireless..., H. Boelcskei, D. Gesbert, C.B. Papadias and A.-J. van der Veen Eds., Cambridge U. Press, 2006. * Z. Tian, T. Davidson, X. Luo, X. Wu and G. B. Giannakis, "Ultra-Wideband Pulse-Shaper Design", Chapter in UWB Wireless Communications, H. Arslan and Y. Chen, Wiley 2005. * G. B. Giannakis, "Statistical Signal Processing", Chapter in DSP, V. K. Madisetti, D. Williams, Editors-in-Chief, CRC Press, 1998. * G. B. Giannakis, "Trends in Spectral Analysis: Higher-Order and Cyclic Statistics", Chapter in Digital Signal Proc. Tech., P. Papamichalis and R. Kerwin, Eds., pp. 74–97, vol. CR57, 1995.

Selected publications

* S. Gezici, Z. Tian, G. B. Giannakis, H. Kobayashi, A. V. Molisch, H. V. Poor and Z. Sahinoglu, "Localization via Ultra-Wideband Radios", ''IEEE Signal Processing Magazine'', vol. 22, no. 4, pp. 70–84, July 2005. * L. Yang, and G. B. Giannakis, "Ultra-Wideband Communications: An Idea whose Time has Come", ''IEEE Signal Processing Magazine'', vol. 21, no. 6, pp. 26–54, November 2004. * Q. Liu, S. Zhou, and G. B. Giannakis, "Cross-Layer Combining of Adaptive Modulation and Coding with Truncated ARQ over Wireless Links", ''IEEE Trans. on Wireless Communications'', vol. 3, no. 5, pp. 1746–1755, September 2004. * Z. Wang, and G. B. Giannakis, "A Simple and General Parameterization Quantifying Performance in Fading Channels", ''IEEE Transactions on Communications'', vol. 51, no. 8, pp. 1389–1398, August 2003. * P. Xia, and G. B. Giannakis, "Design and Analysis of Transmit-Beamforming based on Limited-Rate Feedback", ''IEEE Transactions on Signal Processing,'' vol. 54, no. 5, pp. 1853–1863, May 2006. * G. B. Giannakis, P. Anghel and Z. Wang, "Generalized Multi-Carrier CDMA: Unification and Equalization", ''EURASIP Journal of Applied Signal Processing'', pp. 743–756, February 2005. * Y. Xin, Z. Wang, and G. B. Giannakis, "Space-Time Diversity Systems based on Linear Constellation Precoding", ''IEEE Transactions on Wireless Communications'', vol. 2, no. 2, pp. 294–309, March 2003. * N. D. Sidiropoulos, R. Bro, and G. B. Giannakis, "Parallel Factor Analysis in Sensor Array Processing", ''IEEE Transactions on Signal Processing'', vol. 48, pp. 2377–2388, August 2000. * Z. Wang and G. B. Giannakis, "Wireless Multicarrier Communications: Where Fourier Meets Shannon", ''IEEE Signal Processing Magazine'', vol. 17, pp. 29–48, May 2000. * A. Scaglione, G. B. Giannakis, and S. Barbarossa, "Redundant Filterbank Precoders and Equalizers Part I: Unification and Optimal Designs", ''IEEE Transactions on Signal Processing'', vol. 47, pp. 1988– 2006, July 1999. * M. K. Tsatsanis and G. B. Giannakis, "Principal component filter banks for optimal multiresolution analysis", ''IEEE Transactions on Signal Processing'', vol. 43, pp. 1766–1777, August 1995. * G. B. Giannakis and J. M. Mendel, "Identification of non-minimum phase systems using higher-order statistics", ''IEEE Transactions on Acoustics Speech and Signal Processing'', vol. 37, pp. 360–377, March 1989.

Selected patents

* G. B. Giannakis, and X. Ma, "Estimating Frequency-offsets and Multi-antenna Channels in MIMO-OFDM Systems", US Patent no. US 10,700,800 B2; issued June 30, 2020; impacted LTE (3GPP Tech. Spec.36.211, Sec.6.10). * S. Dhople, G. B. Giannakis, and E. Dall’Anese, "Decentralized Optimal Dispatch of Photovoltaic Inverters in Power Distribution Systems", US Patent no. 10,139,800 B2, issued Nov. 27, 2018. * G. B. Giannakis, and H. Zhu, "State Estimation of Electrical Power Networks using Semidefinite Relaxation", US Patent no. 9,863,985, issued January 9, 2018. * G. B. Giannakis, E. Dall'Anese, J. A. Bazerque, H. Zhu, and G. Mateos, "Robust Parametric Power Spectrum Density Map Construction", US Patent no. 9,363,679, issued June 7, 2016; RF maps for wireless cognitive radios. * G. B. Giannakis, G. Mateos, and J. A. Bazerque, "Non-parametric Power Spectral Density Map Construction", US Patent no. 9,191,831, issued November 17, 2015. * G. B. Giannakis, Y. Xin, and Z. Wang, "Wireless communication system having linear encoder", US Patent no. RE45,230, issued Nov. 4, 2014; complex-field codes that combat fading effects to ensure fast-reliable wireless links. * G. B. Giannakis, P. Xia and S. Zhou, "Bandwidth- and Power-Efficient Multi-Carrier Multiple Access for Uplink Broadband Wireless Communications", US Patent no. 7,672,384, issued March 2, 2010.

References

{{DEFAULTSORT:Giannakis, Georgios B. 1958 births Living people American computer scientists Greek computer scientists University of Minnesota faculty People from Corinth