Signal Processing and Communications Laboratory

Department of Engineering

Albert Guillén i Fàbregas Albert Guillén i Fàbregas

Background - Research - Publications

Position: Principal Research Associate

Office Location: BN3-06

Telephone:

E-mail: albert.guillen [ at] eng.cam.ac.uk

Google Scholar Profile

Background

Albert Guillén i Fàbregas is an ICREA Research Professor at the Department of Information and Communication Technologies, Universitat Pompeu Fabra and a Principal Research Associate (part time) at the Department of Engineering, University of Cambridge. He received the Telecommunication Engineering Degree and the Electronics Engineering Degree from Universitat Politècnica de Catalunya and Politecnico di Torino, respectively in 1999, and the PhD in Communication Systems from École Polytechnique Fédérale de Lausanne in 2004. He has held appointments at the New Jersey Institute of Technology, Telecom Italia, European Space Agency, Institut Eurécom, University of South Australia and the University of Cambridge. He is a recipient of a Starting Grant of the European Research Council. He is a member of the Young Academy of Europe, Senior Member of the IEEE, Editor of the IEEE Transactions on Information Theory, Foundations and Trends in Communications and Information Theory and previously of the IEEE Transactions on Wireless Communications. He is a General co-Chair of the 2016 IEEE International Symposium on Information Theory, Barcelona, July 2016. He has published more than 120 articles, including 1 patent, 1 book, 2 book chapters, 35 journal articles, 9 invited and 74 refereed conference articles.

Research Interests

Information Theory, Communication Theory, Coding Theory, Iterative Decoding, Fading Channels, Multiuser Detection, Digital Signal Processing, Wireless Communications, Satellite Communications, Free-Space Optical Communciations.

Selected Publications

Book

A. Guillén i Fàbregas, A. Martinez and G. Caire, "Bit-Interleaved Coded Modulation", Foundations and Trends on Communications and Information Theory, Now Publishers, vol. 5, no. 1-2, pp. 1-153, 2008, ISBN 978-1-60198-1900-5. http://dx.doi.org/10.1561/0100000019 Promotional code for discounted rate CIT019-00.

Book Chapters

[BC2] A. Guillén i Fàbregas and N. Letzepis, “Hybrid Free-Space Optical and Radio-Fequency Wireless Communications”, Advanced Optical Wireless Communication Systems, Cambridge University Press, 2012, S. Arnon, J. R. Barry, G. K. Karagiannidis, R. Schober, M. Uysal Eds, ISBN 9780521197878.

[BC1] K. P. Liolis, R. De Gaudenzi, N. Alagha, A. Martinez, and A. Guillén i Fàbregas, ``Amplitude Phase Shift Keying Constellation Design and its Applications to Satellite Digital Video Broadcasting", in ``Digital Video", IN-TECH, ISBN 978-3-902613-44-8.

Journal Papers

[J37] J. Scarlett, A. Martinez, A. Guillén i Fàbregas, “ Second-Order Rate Region of Constant Composition Codes for the Multiple-Access Channel”, to appear IEEE Transactions on Information Theory.

[J36] A. T. Asyhari and A. Guillén i Fàbregas, “MIMO Block-Fading Channels with Mismatched CSI”, IEEE Transactions on Information Theory, vol. 60, no. 11, pp. 7166-7186, November 2014.

[J35] J. Scarlett, L. Peng, N. Merhav, A. Martinez and A. Guillén i Fàbregas, “Expurgated Random-Coding Ensembles: Exponents, Refinements and Connections”, IEEE Transactions on Information Theory, vol. 60, no. 7, pp. 4449-4462, July 2014.

[J34] A. Tauste Campo, G. Vazquez-Vilar, A. Guillén i Fàbregas, T. Koch and A. Martinez, “A Derivation of the Source-Channel Error Exponent using Non-identical Product Distributions”, IEEE Transactions on Information Theory, vol. 60, no. 6, pp. 3209-3217, June 2014.

[J33] J. Scarlett, A. Martinez and A. Guillén i Fàbregas, “Mismatched Decoding: Error Exponents, Second-Order Rates and Saddlepoint Approximations”, IEEE Transactions on Information Theory, vol. 60, no. 5, pp. 2647-2666, May 2014.

[J32] A. Guillén i Fàbregas, I. Land and A. Martinez, “Extremes of Error Exponents”, IEEE Transactions on Information Theory, vol. 59, no. 4, pp. 2201-2207, April 2013.

[J31] A. T. Asyhari and A. Guillén i Fàbregas, “Nearest Neighbour Decoding in MIMO Block-Fading Channels with Imperfect CSIR”, IEEE Transactions on Information Theory, vol. 58, no. 3, pp. 1483-1517, March 2012.

[J30] K. D. Nguyen, L. K. Rasmussen, A. Guillén i Fàbregas and N. Letzepis, “MIMO ARQ with Multilevel Feedback: Outage Analysis” IEEE Transactions on Information Theory, vol 58, no. 2, pp. 765-778, February 2012.

[J29] G. Lechner, L. K. Rasmussen and A. Guillén i Fàbregas, “Optimal Power Control for LDPC Codes in Block-fading Channels”, IEEE Transactions on Communications, vol. 59, no. 7, pp. 1759-1765, July 2011.

[J28] A. Tauste Campo, A. Guillén i Fàbregas and E. Biglieri, “Large-System Analysis of Multiuser Detection with an Unknown Number of Users: A High SNR Approach”, IEEE Transactions on Information Theory, vol. 57, no. 6, pp. 3416-3428, June 2011.

[J27] T. T. Kim, K. D. Nguyen and A. Guillén i Fàbregas, “Coded Modulation with Mismatched CSIT over MIMO Block-Fading Channels”, IEEE Transactions on Information Theory, vol. 56, no. 11, pp. 5631-5640, November 2010.

[J26] J. Boutros, A. Guillén i Fàbregas, E. Biglieri and G. Zémor, "Low-Density Parity Check Codes for Nonergodic Block-Fading Channels", IEEE Transactions on Information Theory, vol. 56, no. 9, pp. 4286-4300, September 2010.

[J25] K. D. Nguyen, A. Guillén i Fàbregas and L. K. Rasmussen, "Outage Exponents of Block-Fading Channels with Power Allocation", IEEE Transactions on Information Theory, vol. 56, no. 5, pp. 2373-2381, May 2010.

[J24] N. Letzepis, K. D. Nguyen, A. Guillén i Fàbregas and W. Cowley, “Outage Analysis of the Hybrid Free-Space Optical and Radio-Fequency Channel”, IEEE Journal on Selected Areas in Communications, Special Issue on Optical Wireless Communications, vol 27, no.9, pp. 1709-1719, December 2009.

[J23] N. Letzepis and A. Guillén i Fàbregas, "Outage Probability of the Gaussian MIMO Free Space Optical Channel with PPM", IEEE Transactions on Communications, vol 57, no.12, pp. 3682-3690, December 2009.

[J22] N. Letzepis and A. Guillén i Fàbregas, "Outage Probability of the Free Space Optical Channel with Doubly Stochastic Scintillation", IEEE Transactions on Communications, vol. 57, no. 10, pp. 2899-2902, October 2009.

[J21] A. Martinez, A. Guillén i Fàbregas, G. Caire and F. Willems, "Bit-Interleaved Coded Modulation Revisited: A Mismatched Decoding Perspective", IEEE Transactions on Information Theory, vol 55, no. 6, pp. 2756-2765, June 2009.

[J20] K. D. Nguyen, A. Guillén i Fàbregas and L. K. Rasmussen, "Power Allocation for Block-Fading Channels with Arbitrary Input Constellations", IEEE Transactions on Wireless Communications, vol. 8, no. 5, pp. 2514-2523, May 2009.

[J19] A. Martinez and A. Guillén i Fàbregas, "Large-SNR Error Probability Analysis of BICM with Uniform Interleaving in Fading Channels", IEEE Transactions on Wireless Communications, vol. 8, no. 1, pp. 38-44, January 2009.

[J18] A. Martinez, A. Guillén i Fàbregas, G. Caire and F. Willems, "Bit-Interleaved Coded Modulation in the Wideband Regime", IEEE Transactions on Information Theory, vol. 54, no. 12, pp. 5447-5455, December 2008.

[J17] A. Chuang, A. Guillén i Fàbregas, L. K. Rasmussen and I. B. Collings, "Optimal Throughput-Diversity-Delay Tradeoff in MIMO ARQ Block-Fading Channels", IEEE Transactions on Information Theory, vol. 54, no. 9, pp. 3968-3986, September 2008. Extended version available on arXiv.

[J16] A. Guillén i Fàbregas and G. Caire, "Multidimensional Coded Modulation in Block-Fading Channels", IEEE Transactions on Information Theory, vol. 54, no. 5, pp. 2367-2372, May 2008. Extended version available on arXiv.

[J15] A. Guillén i Fàbregas and E. Viterbo, "The Sphere Lower Bound for Rotated Lattice Constellations in Fading Channels", IEEE Transactions on Wireless Communications, vol. 7, no. 3, pp. 825-830, March 2008. Extended version available on arXiv.

[J14] A. Guillén i Fàbregas and A. Grant, "Capacity Approaching Codes for Non-Coherent Orthogonal Modulation", IEEE Transactions on Wireless Communications, vol. 6, no. 11, pp. 4004-4013, November 2007.

[J13] K. D. Nguyen, A. Guillén i Fàbregas and L. K. Rasmussen, "A Tight Lower Bound to the Outage Probability of Discrete-Input Block-Fading Channels", IEEE Transactions on Information Theory, vol. 53, no. 11, pp. 4314-4322 November 2007.

[J12] Y. Hong and A. Guillén i Fàbregas, "New Space-Time Trellis Codes for Two-Antenna Quasistatic Channels", IEEE Transactions on Vehicular Technology, vol. 56, no. 6, part I, pp. 3581-3587, November 2007.

[J11] A. Guillén i Fàbregas and A. Martinez, "Derivative of BICM Mutual Information", IET Electronics Letters, vol 43, no. 22, pp. 1219-1220, 25th October 2007.

[J10] G. M. Kraidy, J. J. Boutros and A. Guillén i Fàbregas, "Outage-Approaching Turbo-Codes for the Amplify-and-Forward Relay Channel", IEEE Communications Letters, vol 11, no. 10, pp. 808-810, October 2007.

[J9] A. Martinez, A. Guillén i Fàbregas and G. Caire, "A Closed-Form Approximation for the Error Probability of BPSK Fading Channels", IEEE Transactions on Wireless Communications, vol. 6, no. 6, pp. 2051-2056, June 2007.

[J8] A. Guillén i Fàbregas, "Coding in the Block-Erasure Channel", IEEE Transactions on Information Theory, vol. 52, no. 11, pp. 5116-5121, November 2006.

[J7] A. Guillén i Fàbregas, M. Guillaud, D. T. M. Slock,G. Caire, K. Gosse, S. Rouquette, A. Ribeiro Dias, P. Bernardin, X. Miet, J.-M. Conrat, Y. Toutain, A. Peden and Z. Li, "A MIMO-OFDM Testbed for Wireless Local Area Networks ", EURASIP Journal on Applied Signal Processing, Special Issue on Implementation Aspects and Testbeds for MIMO Systems. Volume 2006, Article ID 18083, Pages 1-20.

[J6] R. De Gaudenzi, A. Guillén i Fàbregas and A. Martinez, "Performance Analysis of Turbo-Coded APSK Modulations for Satellite Broadband Communications", IEEE Transactions on Wireless Communications, vol. 5, no. 9, pp.2396-2407, September 2006.

[J5] A. Guillén i Fàbregas and A. Grant, "Parameter Free Iterative Decoding Metrics for Non-Coherent Orthogonal Modulation", IET Electronics Letters, vol. 42, no. 18, 31st August 2006.

[J4] R. De Gaudenzi, A. Guillén i Fàbregas and A. Martinez, "Design of Turbo-Coded APSK Modulations for Satellite Broadband Communications", Wiley International Journal of Satellite Communications and Networking, vol. 24, no. 4, pp. 261-281, July/August 2006.

[J3] A. Guillén i Fàbregas and G. Caire, "Impact of Signal Constellation Expansion on the Achievable Diversity of Pragmatic Bit-interleaved Space-Time Codes", IEEE Transactions on Wireless Communications, vol. 5, no. 8, pp. 2032-2037, August 2006.

[J2] A. Martinez, A. Guillén i Fàbregas and G. Caire, "Error Probability Analysis of Bit-Interleaved Coded Modulation" IEEE Transactions on Information Theory, vol. 52, no. 1, pp. 262-271, January 2006.

[J1] A. Guillén i Fàbregas and G. Caire, "Coded Modulation in the Block-Fading Channel: Coding Theorems and Code Construction", IEEE Transactions on Information Theory, vol. 52, no. 1, pp. 91-114, January 2006.

Recent Conference Papers

A. Martinez, J. Scarlett, M. Dalai, A. Guillén i Fàbregas, “A Complex-Integration Approach to the Saddlepoint Approximation for Random-Coding Bounds”, 2014 International Symposium on Wireless Communications Systems, Barcelona, Spain, August 2014.

J. Scarlett, A. Martinez and A. Guillén i Fàbregas, “The Saddlepoint Approximation: Unified Random Coding Asymptotics for Fixed and Varying Rates”, IEEE International Symposium on Information Theory, Hawaii, USA, June-July 2014.

I. Bocharova, A. Guillén i Fàbregas, B. Kudryashov, A. Martinez, A. Tauste Campo, G. Vazquez-Vilar, “Source-Channel Coding with Multiple Classes”, IEEE International Symposium on Information Theory, Hawaii, USA, June-July 2014.

J. Scarlett, A. Martinez and A. Guillén i Fàbregas, “Mismatched Multi-letter Successive Decoding for the Multiple-Access Channel”, IEEE International Symposium on Information Theory, Hawaii, USA, June-July 2014.

J. Guo, M. Qin, P. Siegel and A. Guillén i Fàbregas, “Enhanced Belief Propagation Decoding of Polar Codes through Concatenation”, IEEE International Symposium on Information Theory, Hawaii, USA, June-July 2014.

J. Scarlett, L. Peng, N. Merhav, A. Martinez and A. Guillén i Fàbregas, “Expurgated Random-Coding Ensembles: Exponents, Refinements and Connections”, 2014 International Zurich Seminar on Communications, Zurich, Switzerland, February 2014.

J. Scarlett, A. Martinez and A. Guillén i Fàbregas, “A Derivation of the Asymptotic Random-Coding Prefector”, 51st Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, USA, October 2013.

G. Vazquez-Vilar, A. Tauste Campo, A. Guillén i Fàbregas and A. Martinez, “The Meta-Converse Bound is Tight”, 2013 IEEE International Symposium on Information Theory, Istanbul, Turkey, July 2013.

J. Scarlett, A. Martinez and A. Guillén i Fàbregas, “Superposition Codes for Mismatched Decoding”, 2013 IEEE International Symposium on Information Theory, Istanbul, Turkey, July 2013.

L. Peng, A. Guillén i Fàbregas and A. Martinez, “Improved Exponents and Rates for Bit-Interleaved Coded Modulation”, 2013 IEEE International Symposium on Information Theory, Istanbul, Turkey, July 2013.

J. Guo, A. Guillén i Fàbregas and J. Sayir, “Fixed-Threshold Polar Codes”, 2013 IEEE International Symposium on Information Theory, Istanbul, Turkey, July 2013.

J. Scarlett, A. Martinez and A. Guillén i Fàbregas, “Cost Constrained Random Coding with Applications”, 2013 Information Theory and Applications Workshop, University of California, San Diego, February 2013.

J. Scarlett and A. Guillén i Fàbregas, “An Achievable Error Exponent for the Mismatched Multiple-Access Channel”, 50th Annual Allerton Conference on Communication, Control and Computing, Allerton, IL, October 2012.

J. Scarlett, A. Martinez and A. Guillén i Fàbregas, “Ensemble-Tight Error Exponents for Mismatched Decoders”, 50th Annual Allerton Conference on Communication, Control and Computing, Allerton, IL, October 2012.

A. Tauste Campo, G. Vazquez-Vilar, A. Guillén i Fàbregas, T. Koch and A. Martinez, “Achieving Csiszár’s Exponent for Joint Source-Channel Coding with Product Distributions”,2012 IEEE International Symposium on Information Theory, MIT, Cambridge, MA, USA, July 2012.

T. Koch, A. Martinez and A. Guillén i Fàbregas, “The Capacity Loss of Dense Constellations”, 2012 IEEE International Symposium on Information Theory, MIT, Cambridge, MA, USA, July 2012.