# Robert Calderbank

- Charles S. Sydnor Professor of Computer Science
- Professor of Computer Science
- Director of the Information Initiative at Duke
- Professor of Mathematics (Joint)
- Professor of Electrical and Computer Engineering (Joint)
- Professor of Physics (Secondary)

**External address:**140 Science Drive, 317 Gross Hall, Durham, NC 27708

**Internal office address:**Campus Box 90984, 140 Science Drive, Durham, NC 27708

**Phone:**(919) 613-7874

### Research Areas and Keywords

##### Algebra & Combinatorics

##### Analysis

##### Computational Mathematics

##### Number Theory

##### Physical Modeling

##### Probability

##### Signals, Images & Data

Robert Calderbank is Director of the Information Initiative at Duke University, where he is Professor of Electrical Engineering, Computer Science and Mathematics. He joined Duke in 2010, completed a 3 year term as Dean of Natural Sciences in August 2013, and also served as Interim Director of the Duke Initiative in Innovation and Entrepreneurship in 2012. Before joining Duke he was Professor of Electrical Engineering and Mathematics at Princeton University where he also directed the Program in Applied and Computational Mathematics.

Before joining Princeton University Dr. Calderbank was Vice President for Research at AT&T. As Vice President for Research he managed AT&T intellectual property, and he was responsible for licensing revenue. AT&T Labs was the first of a new type of research lab where masses of data generated by network services became a giant sandbox in which fundamental discoveries in information science became a source of commercial advantage

At Duke, Dr. Calderbank works with researchers from the Duke Center for Autism and Brain Development, developing information technology that is able to capture a full spectrum of behavior in very young children. By supporting more consistent and cost-effective early diagnosis, the team is increasing the opportunity for early interventions that have proven very effective.

At the start of his career at Bell Labs, Dr. Calderbank developed voiceband modem technology that was widely licensed and incorporated in over a billion devices. Voiceband means the signals are audible so these modems burped and squeaked as they connected to the internet. One of these products was the AT&T COMSPHERE^{®} modem which was the fastest modem in the world in 1994 – at 33.6kb/s!

Together with Peter Shor and colleagues at AT&T Labs Dr. Calderbank developed the group theoretic framework for quantum error correction. This framework changed the way physicists view quantum entanglement, and provided the foundation for fault tolerant quantum computation.

Dr. Calderbank has also developed technology that improves the speed and reliability of wireless communication by correlating signals across several transmit antennas. Invented in 1996, this *space-time coding* technology has been incorporated in a broad range of 3G, 4G and 5G wireless standards. He served on the Technical Advisory Board of Flarion Technologies a wireless infrastructure company founded by Rajiv Laroia and acquired by Qualcomm for $1B in 2008.

Dr. Calderbank is an IEEE Fellow and an AT&T Fellow, and he was elected to the National Academy of Engineering in 2005. He received the 2013 IEEE Hamming Medal for contributions to coding theory and communications and the 2015 Shannon Award.

### Selected Grants

Photon-limited Sensing and Surveillance awarded by Air Force Office of Scientific Research (Principal Investigator). 2011 to 2014

## Pages

Harms, A, Bajwa, WU, and Calderbank, R. "Identification of Linear Time-Varying Systems Through Waveform Diversity." *Ieee Transactions on Signal Processing* 63.8 (April 2015): 2070-2084.
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Hashemi, J, Campbell, K, Carpenter, K, Harris, A, Qiu, Q, Tepper, M, Espinosa, S, Schaich Borg, J, Marsan, S, Calderbank, R, Baker, J, Egger, H, Dawson, G, and Sapiro, G. "A scalable app for measuring autism risk behaviors in young children: A technical validity and feasibility study." *Proceedings of the 5th Eai International Conference on Wireless Mobile Communication and Healthcare "Transforming Healthcare Through Innovations in Mobile and Wireless Technologies"* (2015).
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Wang, L, Huang, J, Yuan, X, Krishnamurthy, K, Greenberg, J, Cevher, V, Rodrigues, MRD, Brady, D, Calderbank, R, and Carin, L. "Signal Recovery and System Calibration from Multiple Compressive Poisson Measurements." *Siam Journal on Imaging Sciences* 8.3 (January 2015): 1923-1954.
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Calderbank, R, Thompson, A, and Xie, Y. "On block coherence of frames." *Applied and Computational Harmonic Analysis* 38.1 (January 2015): 50-71.
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Goparaju, S, and Calderbank, R. "Binary cyclic codes that are locally repairable." *2014 Ieee International Symposium on Information Theory* (June 2014).
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Nokleby, M, Rodrigues, M, and Calderbank, R. "Discrimination on the grassmann manifold: Fundamental limits of subspace classifiers." *2014 Ieee International Symposium on Information Theory* (June 2014).
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Goparaju, S, El Rouayheb, S, and Calderbank, R. "New codes and inner bounds for exact repair in distributed storage systems." *2014 Ieee International Symposium on Information Theory* (June 2014).
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Liming Wang, , Carlson, DE, Rodrigues, MRD, Calderbank, R, and Carin, L. "A Bregman Matrix and the Gradient of Mutual Information for Vector Poisson and Gaussian Channels." *Ieee Transactions on Information Theory* 60.5 (May 2014): 2611-2629.
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Carpenter, K, Sprechmann, P, Fiori, M, Calderbank, R, Egger, H, and Sapiro, G. "Questionnaire simplification for fast risk analysis of children's mental health." *2014 Ieee International Conference on Acoustics, Speech and Signal Processing (Icassp)* (May 2014).
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Nokleby, M, Rodrigues, M, and Calderbank, R. "Information-theoretic criteria for the design of compressive subspace classifiers." *2014 Ieee International Conference on Acoustics, Speech and Signal Processing (Icassp)* (May 2014).
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## Pages

Kumar, S, Calderbank, R, and Pfister, HD. "Reed-muller codes achieve capacity on the quantum erasure channel." 2016 IEEE International Symposium on Information Theory (ISIT). July 10, 2016 - July 15, 2016.: IEEE, July 2016. Full Text

Nokleby, M, Beirami, A, and Calderbank, R. "Rate-distortion bounds on Bayes risk in supervised learning." 2016 IEEE International Symposium on Information Theory (ISIT). July 10, 2016 - July 15, 2016.: IEEE, July 2016. Full Text

Vahid, A, and Calderbank, R. "When does spatial correlation add value to delayed channel state information?." 2016 IEEE International Symposium on Information Theory (ISIT). July 10, 2016 - July 15, 2016.: IEEE, July 2016. Full Text

Mappouras, G, Vahid, A, Calderbank, R, and Sorin, DJ. "Methuselah Flash: Rewriting Codes for Extra Long Storage Lifetime." 2016 46th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DSN). June 28, 2016 - July 1, 2016.: IEEE, June 2016. Full Text

Wang, L, Renna, F, Yuan, X, Rodrigues, M, Calderbank, R, and Carin, L. "A general framework for reconstruction and classification from compressive measurements with side information." 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). March 20, 2016 - March 25, 2016.: IEEE, March 2016. Full Text

Huang, J, Qiu, Q, Calderbank, R, and Sapiro, G. "Geometry-Aware Deep Transform." 2015 IEEE International Conference on Computer Vision (ICCV). December 7, 2015 - December 13, 2015.: IEEE, December 2015. Full Text

Goparaju, S, Rouayheb, SE, and Calderbank, R. "Can linear minimum storage regenerating codes be universally secure?." 2015 49th Asilomar Conference on Signals, Systems and Computers. November 8, 2015 - November 11, 2015.: IEEE, November 2015. Full Text

Renna, F, Wang, L, Yuan, X, Yang, J, Reeves, G, Calderbank, R, Carin, L, and Rodrigues, MRD. "Classification and reconstruction of compressed GMM signals with side information." September 28, 2015. Full Text

Vahid, A, Shomorony, I, and Calderbank, R. "Informational bottlenecks in two-unicast wireless networks with delayed CSIT." 2015 53rd Annual Allerton Conference on Communication, Control and Computing (Allerton). September 29, 2015 - October 2, 2015.: IEEE, September 2015. Full Text

Nokleby, M, Beirami, A, and Calderbank, R. "A rate-distortion framework for supervised learning." 2015 IEEE 25th International Workshop on Machine Learning for Signal Processing (MLSP). September 17, 2015 - September 20, 2015.: IEEE, September 2015. Full Text