# 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.

Chi, Y, Eldar, YC, and Calderbank, R. "PETRELS: Parallel subspace estimation and tracking by recursive least squares from partial observations." *Ieee Transactions on Signal Processing* 61.23 (November 27, 2013): 5947-5959.
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Chi, Y, and Calderbank, R. "Knowledge-enhanced matching pursuit." *Icassp, Ieee International Conference on Acoustics, Speech and Signal Processing Proceedings* (October 18, 2013): 6576-6580.
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Renna, F, Rodrigues, MRD, Chen, M, Calderbank, R, and Carin, L. "Compressive sensing for incoherent imaging systems with optical constraints." *Icassp, Ieee International Conference on Acoustics, Speech and Signal Processing Proceedings* (October 18, 2013): 5484-5488.
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Goparaju, S, Rouayheb, SE, Calderbank, R, and Poor, HV. "Data secrecy in distributed storage systems under exact repair." *2013 International Symposium on Network Coding, Netcod 2013* (September 9, 2013).
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Jacobvitz, AN, Calderbank, R, and Sorin, DJ. "Coset coding to extend the lifetime of memory." *Proceedings International Symposium on High Performance Computer Architecture* (July 23, 2013): 222-233.
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Reboredo, H, Renna, F, Calderbank, R, and Rodrigues, MRD. "Compressive classification." *2013 Ieee International Symposium on Information Theory* (July 2013).
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Goparaju, S, and Calderbank, R. "A new sub-packetization bound for minimum storage regenerating codes." *2013 Ieee International Symposium on Information Theory* (July 2013).
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Wang, M, Xu, W, and Calderbank, R. "Compressed sensing with corrupted participants." *2013 Ieee International Conference on Acoustics, Speech and Signal Processing* (May 2013).
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Duarte, MF, Jafarpour, S, and Calderbank, AR. "Performance of the Delsarte-Goethals Frame on Clustered Sparse Vectors." *Ieee Transactions on Signal Processing* 61.8 (April 2013): 1998-2008.
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Harms, A, Bajwa, WU, and Calderbank, R. "A constrained random demodulator for sub-nyquist sampling." *Ieee Transactions on Signal Processing* 61.3 (February 1, 2013): 707-723.
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## Pages

Boche, H, Calderbank, R, Kutyniok, G, and Vybíral, J. "A survey of compressed sensing." January 1, 2015. Full Text

Huang, J, Qiu, Q, Calderbank, R, Rodrigues, M, and Sapiro, G. "Alignment with intra-class structure can improve classification." January 1, 2015. Full Text

Rodrigues, M, Nokleby, M, Renna, F, and Calderbank, R. "Compressive classification: Where wireless communications meets machine learning." January 1, 2015. Full Text

Huang, J, Yuan, X, and Calderbank, R. "Multi-scale Bayesian reconstruction of compressive X-ray image." January 1, 2015. Full Text

Huang, J, Yuan, X, and Calderbank, R. "Collaborative compressive X-ray image reconstruction." January 1, 2015. Full Text

Harms, A, Bajwa, W, and Calderbank, R. "Efficient linear time-varying system identification using chirp waveforms." January 1, 2015. Full Text

"Dynamic spectrum estimation with minimal overhead via multiscale information exchange." January 1, 2015. Full Text

Wang, L, Razi, A, Dias Rodrigues, M, Calderbank, R, and Carin, L. "Nonlinear information-theoretic compressive measurement design." January 1, 2014.

Bajwa, WU, Duarte, MF, and Calderbank, R. "Average case analysis of high-dimensional block-sparse recovery and regression for arbitrary designs." January 1, 2014.

Harms, A, Bajwa, WU, Calderbank, R, and IEEE, . "Shaping the Power Spectra of Bipolar Sequences with Application to Sub-Nyquist Sampling." 2013.