Alexandre Graell i Amat

Biträdande professor at Electrical Engineering, Kommunikationssystem, informationsteori och antenner, Communication Systems

Projects

2017–2020

Reliable Uncoordinated Medium Access for Critical Low-Latency Communication

Fredrik Brännström Communication Systems
Alexandre Graell i Amat Communication Systems
Swedish Research Council (VR)

2012–2015

MIMO-BICM: Fundamentals, Analysis, and Design

Fredrik Brännström Communication Systems
Mikhail Ivanov Communication Systems
Erik Agrell Communication Systems
Alexandre Graell i Amat Communication Systems
Swedish Research Council (VR)

2014–2019

Energy-efficient optical fibre communication

Erik Agrell Communication Systems
Christoffer Fougstedt Computer Engineering (Chalmers)
Anders Larsson Photonics
Peter Andrekson Photonics
Alexandre Graell i Amat Communication Systems
Kevin Cushon Computer Engineering (Chalmers)
Alireza Sheikh Communication Systems
Per Larsson-Edefors Computer Engineering (Chalmers)
Magnus Karlsson Photonics
Lars Lundberg Photonics
Knut and Alice Wallenberg Foundation

2016–2020

Coding for Optical communications In the Nonlinear regime (COIN)

Erik Agrell Communication Systems
Alexandre Graell i Amat Communication Systems
European Commission (Horizon 2020)

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Publications

2017

Probabilistically-Shaped Coded Modulation with Hard Decision Decoding for Coherent Optical Systems

Sheikh Alireza, Alexandre Graell i Amat, Gianluigi Liva et al
European Conf. on Optical Commun. (ECOC)
Conference paper - peer reviewed
2017

On Achievable Information Rates for Coherent Fiber-Optic Systems with Hard Decision Decoding

Sheikh Alireza, Alexandre Graell i Amat, Gianluigi Liva et al
European Conf. on Optical Commun. (ECOC)
Conference paper - peer reviewed
2017

Spatially Coupled Hybrid Concatenated Codes

Saeedeh Moloudi, Michael Lentmaier, Alexandre Graell i Amat et al
11th International ITG Conference on Systems, Communications and Coding (SCC)
Conference paper - peer reviewed
2017

Density Evolution for Deterministic Generalized Product Codes on the Binary Erasure Channel at High Rates

Christian Häger, Henry D. Pfister, Alexandre Graell i Amat et al
IEEE Transactions on Information Theory. Vol. 63 (7), p. 4357-4378
Scientific journal article - peer reviewed
2017

Nonbinary Staircase Codes for Spectrally and Energy Efficient Fiber-Optic Systems

Sheikh Alireza, Alexandre Graell i Amat, Magnus Karlsson et al
Optical Fiber Communication Conference 2017
Conference paper - peer reviewed
2017

Broadcast coded slotted ALOHA: A finite frame length analysis

Mikhail Ivanov, Fredrik Brännström, Alexandre Graell i Amat et al
IEEE Transactions on Communications. Vol. 65 (2), p. 651-662
Scientific journal article - peer reviewed
2017

On Frame Asynchronous Coded Slotted ALOHA: Asymptotic, Finite Length, and Delay Analysis

Erik Sandgren, Alexandre Graell i Amat, Fredrik Brännström et al
IEEE Transactions on Communications. Vol. 65 (2), p. 691-704
Scientific journal article - peer reviewed
2017

Compressed Sensing in Wireless Sensor Networks without Explicit Position Information

Christopher Lindberg, Alexandre Graell i Amat, Henk Wymeersch et al
IEEE Transactions on Signal and Information Processing over Networks. Vol. 3 (2), p. 404-415
Scientific journal article - peer reviewed
2016

Unequal Error Protection in Coded Slotted ALOHA

Mikhail Ivanov, Fredrik Brännström, Alexandre Graell i Amat et al
IEEE Wireless Communications Letters. Vol. 5 (5), p. 536-539
Scientific journal article - peer reviewed
2016

Distributed Storage in Mobile Wireless Networks with Device-to-Device Communication

Jesper Pedersen, Alexandre Graell i Amat, Iryna Andriyanova et al
IEEE Transactions on Communications. Vol. 64 (11), p. 4862-4878
Scientific journal article - peer reviewed
2016

Dispersion Compensation FIR Filter with Improved Robustness to Coefficient Quantization Errors

Sheikh Alireza, Christoffer Fougstedt, Alexandre Graell i Amat et al
Journal of Lightwave Technology. Vol. 34 (22), p. 5110-5117
Scientific journal article - peer reviewed
2016

Finite Length Weight Enumerator Analysis of Braided Convolutional Codes

Saeedeh Moloudi, Michael Lentmaier, Alexandre Graell i Amat et al
International Symposium on Information Theory and Its Applications (ISITA), p. 488-492
Conference paper - peer reviewed
2016

Density Evolution for Deterministic Generalized Product Codes with Higher-Order Modulation

Christian Häger, Alexandre Graell i Amat, Henry D. Pfister et al
Proc. 9th Int. Symp. on Turbo Codes and Iterative Information Processing (ISTC), 2016, Brest, France, p. 236-240
Conference paper - peer reviewed
2016

MDS-coded distributed storage for low delay wireless content delivery

Amina Piemontese, Alexandre Graell i Amat,
9th International Symposium on Turbo Codes and Iterative Information Processing, ISTC 2016; Brest; France; 5-9 September 2016
Conference paper - peer reviewed
2016

Asymptotic and Finite Frame Length Analysis of Frame Asynchronous Coded Slotted ALOHA

Erik Sandgren, Alexandre Graell i Amat, Fredrik Brännström et al
9th International Symposium on Turbo Codes and Iterative Information Processing (ISTC), Brest, FRANCE, SEP 05-09, 2016 , p. 81-85
Conference paper - peer reviewed
2016

On the Information Loss of the Max-Log Approximation in BICM Systems

Mikhail Ivanov, Christian Häger, Fredrik Brännström et al
IEEE Transactions on Information Theory. Vol. 62 (6), p. 3011 - 3025
Scientific journal article - peer reviewed
2016

Secure Repairable Fountain Codes

Siddhartha Kumar, Eirik Rosnes, Alexandre Graell i Amat et al
IEEE Communications Letters. Vol. 20 (8), p. 1491-1494
Scientific journal article - peer reviewed
2016

Deterministic and Ensemble-Based Spatially-Coupled Product Codes

Christian Häger, Henry D. Pfister, Alexandre Graell i Amat et al
IEEE International Symposium on Information Theory - Proceedings, p. 2114-2118
Conference paper - peer reviewed
2016

Threshold Saturation for Nonbinary SC-LDPC Codes on the Binary Erasure Channel

Iryna Andriyanova, Alexandre Graell i Amat,
IEEE Transactions on Information Theory. Vol. 62 (5), p. 2622-2638
Scientific journal article - peer reviewed
2016

A Deterministic Construction and Density Evolution Analysis for Generalized Product Codes

Christian Häger, Henry D. Pfister, Alexandre Graell i Amat et al
Proc. Int. Zurich Seminar on Communications (IZS)
Conference paper - non peer reviewed
2016

Density Evolution and Error Floor Analysis for Staircase and Braided Codes

Christian Häger, Henry D. Pfister, Alexandre Graell i Amat et al
Proc. Optical Fiber Communication Conf. and Exposition (OFC)
Conference paper - peer reviewed
2016

Linear Massive MIMO Precoders in the Presence of Phase Noise – A Large-Scale Analysis

Rajet Krishnan, Mohammad Reza Khanzadi, N. Krishnan et al
IEEE Transactions on Vehicular Technology. Vol. 65 (5), p. 3057-3071
Scientific journal article - peer reviewed
2015

Power-Efficient Time-Domain Dispersion Compensation Using Optimized FIR Filter Implementation

Christoffer Fougstedt, Sheikh Alireza, Pontus Johannisson et al
Signal Processing in Photonics Communications, SPPCom 2015; Boston, MA; United States; 27 June 2015-1 July 2015, p. SpT3D.3
Conference paper - peer reviewed
2015

Dispersion Compensation Filter Design Optimized for Robustness and Power Efficiency

Sheikh Alireza, Christoffer Fougstedt, Alexandre Graell i Amat et al
Signal Processing in Photonics Communications, SPPCom 2015; Boston, MA; United States; 27 June 2015 through 1 July 2015 , p. SpT3D.2
Conference paper - peer reviewed
2015

A Family of Erasure Correcting Codes with Low Repair Bandwidth and Low Repair Complexity

Siddhartha Kumar, Alexandre Graell i Amat, Iryna Andriyanova et al
IEEE Global Communications Conference (GLOBECOM), San Diego, CA, DEC 06-10, 2015
Conference paper - peer reviewed
2015

Repair Scheduling in Wireless Distributed Storage with D2D Communication

Jesper Pedersen, Alexandre Graell i Amat, Iryna Andriyanova et al
IEEE Information Theory Workshop (ITW), p. 69-73
Conference paper - peer reviewed
2015

Threshold Saturation for Spatially Coupled Turbo-like Codes over the Binary Erasure Channel

Saeedeh Moloudi, Michael Lentmaier, Alexandre Graell i Amat et al
IEEE Information Theory Workshop (ITW), p. 138-142
Conference paper - peer reviewed
2015

Analysis of Spatially-Coupled Counter Braids

Eirik Rosnes, Alexandre Graell i Amat,
IEEE Information Theory Workshop (ITW), p. 133-137
Conference paper - peer reviewed
2015

Impact of Forward Error Correction on Energy Consumption of VCSEL-based Transmitters

Krzysztof Szczerba, Christoffer Fougstedt, Per Larsson-Edefors et al
41st European Conference on Optical Communication, ECOC 2015, Valencia, Spain, 27 September - 1 October 2015
Conference paper - peer reviewed
2015

Algorithms for Joint Phase Estimation and Decoding for MIMO Systems in the Presence of Phase Noise and Quasi-Static Fading Channels

Rajet Krishnan, Giulio Colavolpe, Alexandre Graell i Amat et al
IEEE Transactions on Signal Processing. Vol. 63 (13), p. 3360-3375
Scientific journal article - peer reviewed
2015

Probabilistic Handshake in All-to-all Broadcast Coded Slotted ALOHA

Mikhail Ivanov, Petar Popovski, Fredrik Brännström et al
Proc. IEEE Int. Workshop Signal Proc. Advances Wireless Commun., Stockholm, Sweden, June 2015, p. 690-694
Conference paper - peer reviewed
2015

Spatially-Coupled Codes for Optical Communications: State-of-the-Art and Open Problems

Alexandre Graell i Amat, Christian Häger, Fredrik Brännström et al
20th OptoElectronics and Communications Conference, OECC 2015, p. Art. no. 7340116
Conference paper - peer reviewed
2015

All-to-all Broadcast for Vehicular Networks Based on Coded Slotted ALOHA

Mikhail Ivanov, Fredrik Brännström, Alexandre Graell i Amat et al
IEEE International Conference on Communication Workshop, ICCW 2015, London, UK, June 2015, p. 2046-2050
Conference paper - peer reviewed
2015

Large-Scale Analysis of Linear Massive MIMO Precoders in the Presence of Phase Noise

Rajet Krishnan, Mohammad Reza Khanzadi, N. Krishnan et al
2015 IEEE International Conference on Communication Workshop, p. 1172-1177
Conference paper - peer reviewed
2015

Terminated and Tailbiting Spatially-Coupled Codes with Optimized Bit Mappings for Spectrally Efficient Fiber-Optical Systems

Christian Häger, Alexandre Graell i Amat, Fredrik Brännström et al
Journal of Lightwave Technology. Vol. 33 (7), p. 1275-1285
Scientific journal article - peer reviewed
2015

On Parameter Optimization for Staircase Codes

Christian Häger, Alexandre Graell i Amat, Henry D. Pfister et al
Proc. Optical Fiber Communication Conference and Exposition (OFC)
Conference paper - peer reviewed
2015

Error Floor Analysis of Coded Slotted ALOHA over Packet Erasure Channels

Mikhail Ivanov, Fredrik Brännström, Alexandre Graell i Amat et al
IEEE Communications Letters. Vol. 19 (3), p. 419-422
Scientific journal article - peer reviewed
2014

Distributed Compressed Sensing for Sensor Networks with Packet Erasures

Christopher Lindberg, Alexandre Graell i Amat, Henk Wymeersch et al
2014 IEEE Global Communications Conference, GLOBECOM 2014; Austin; United States; 8 December 2014 through 12 December 2014, p. 13-19
Conference paper - peer reviewed
2014

An Introduction to Distributed Channel Coding

Alexandre Graell i Amat, Ragnar Thobaben,
Channel Coding: Theory, Algorithms, and Applications, Academic Press Library in Mobile and Wireless Communications, p. 399-450
Chapter in monograph, book
2014

Spatially Coupled Turbo Codes: Principles and Finite Length Performance

Alexandre Graell i Amat, Saeedeh Moloudi, Michael Lentmaier et al
11th International Symposium on Wireless Communications Systems, ISWCS 2014; Barcelona; Spain; 26 August 2014 through 29 August 2014, p. 883-887
Conference paper - peer reviewed
2014

Spatially Coupled Turbo Codes

Saeedeh Moloudi, Michael Lentmaier, Alexandre Graell i Amat et al
8th International Symposium on Turbo Codes & Iterative Information Processing, ISTC 2014, Bremen, Germany, August 2014., p. 82-86
Conference paper - peer reviewed
2014

Proving Threshold Saturation for Nonbinary SC-LDPC Codes on the Binary Erasure Channel

Alexandre Graell i Amat, Iryna Andriyanova, Amina Piemontese et al
31st General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2014; Beijing; China; 16 August 2014 through 23 August 2014, p. Art. no. 6929239
Conference paper - peer reviewed
2014

Braided Convolutional Codes: A Class of Spatially Coupled Turbo-Like Codes

Michael Lentmaier, Saeedeh Moloudi, Alexandre Graell i Amat et al
International Conference on Signal Processing and Communications (SPCOM). Invited Paper. Bangalore, India, 22-25 July 2014, p. Art. no. 6983939
Conference paper - peer reviewed
2014

Minimum Pseudoweight Analysis of 3-Dimensional Turbo Codes

Eirik Rosnes, Michael Helmling, Alexandre Graell i Amat et al
IEEE Transactions on Communications. Vol. 62 (7), p. 2170-2182
Scientific journal article - peer reviewed
2014

Using Short Synchronous WOM Codes to Make WOM Codes Decodable

Nicolas Bitouze, Alexandre Graell i Amat, Eirik Rosnes et al
IEEE Transactions on Communications. Vol. 62 (7), p. 2156-2169
Scientific journal article - peer reviewed
2014

Joint phase noise estimation and data detection in coded multi-input-multi-output systems

Arif Onder Isikman, Hani Mehrpouyan, A. A. Nasir et al
Iet Communications. Vol. 8 (7), p. 981-989
Scientific journal article - peer reviewed
2014

Comparison of Terminated and Tailbiting Spatially Coupled LDPC Codes With Optimized Bit Mapping for PM-64-QAM

Christian Häger, Alexandre Graell i Amat, Fredrik Brännström et al
2014 European Conference on Optical Communication, ECOC 2014; Cannes; France; 21 September 2014 through 25 September 2014, p. Art. no. 6964047
Conference paper - peer reviewed
2014

Improving soft FEC performance for higher-order modulations via optimized bit channel mappings

Christian Häger, Alexandre Graell i Amat, Fredrik Brännström et al
Optics Express. Vol. 22 (12), p. 14544-14558
Scientific journal article - peer reviewed
2014

Spatially-Coupled LDPC Codes for Decode-and-Forward Relaying of Two Correlated Sources over the BEC

Stefan Schwandter, Alexandre Graell i Amat, Gerald Matz et al
IEEE Transactions on Communications. Vol. 62 (4), p. 1324-1337
Scientific journal article - peer reviewed
2014

Optimized Bit Mappings for Spatially Coupled LDPC Codes over Parallel Binary Erasure Channels

Christian Häger, Alexandre Graell i Amat, Alex Alvarado et al
Proc. 1st IEEE International Conference on Communications (ICC), p. 2064-2069
Conference paper - peer reviewed
2014

A Low-Complexity Detector for Memoryless Polarization-Multiplexed Fiber-Optical Channels

Christian Häger, Lotfollah Beygi, Erik Agrell et al
IEEE Communications Letters. Vol. 18 (2), p. 368-371
Scientific journal article - peer reviewed
2014

On Noisy ARQ in Block-Fading Channels

Behrooz Makki, Alexandre Graell i Amat, Thomas Eriksson et al
IEEE Transactions on Vehicular Technology. Vol. 63 (2), p. 731-746
Scientific journal article - peer reviewed
2014

Green Communication via Power-optimized HARQ Protocols

Behrooz Makki, Alexandre Graell i Amat, Thomas Eriksson et al
IEEE Transactions on Vehicular Technology. Vol. 63 (1), p. 161-177
Scientific journal article - peer reviewed
2013

Nonbinary Spatially-coupled LDPC Codes on the Binary Erasure Channel

Amina Piemontese, Alexandre Graell i Amat, Giulio Colavolpe et al
IEEE International Conference on Communications (ICC), p. 3270 - 3274
Conference paper - peer reviewed
2013

Constellation Optimization in the Presence of Strong Phase Noise

Rajet Krishnan, Alexandre Graell i Amat, Thomas Eriksson et al
IEEE Transactions on Communications. Vol. 61 (12), p. 5056-5066
Scientific journal article - peer reviewed
2013

On Optimal TCM Encoders

Alex Alvarado, Alexandre Graell i Amat, Fredrik Brännström et al
IEEE Transactions on Communications. Vol. 61 (6), p. 2178 - 2189
Scientific journal article - peer reviewed
2013

Design of APSK Constellations for Coherent Optical Channels with Nonlinear Phase Noise

Christian Häger, Alexandre Graell i Amat, Alex Alvarado et al
IEEE Transactions on Communications. Vol. 61 (8), p. 3362-3373
Scientific journal article - peer reviewed
2013

Frequency Packing and Multiuser Detection for CPMs: How to Improve the Spectral Efficiency of DVB-RCS2 Systems

Amina Piemontese, Alexandre Graell i Amat, Giulio Colavolpe et al
IEEE Wireless Communications Letters. Vol. 2 (1), p. 74-77
Scientific journal article - peer reviewed
2012

On ARQ-Based Fast-Fading Channels

Behrooz Makki, Alexandre Graell i Amat, Thomas Eriksson et al
IEEE Communications Letters. Vol. 16 (12), p. 1921-1924
Scientific journal article - peer reviewed
2012

Spatially Coupled LDPC Codes for Two-User Decode-and-Forward Relaying'

Stefan Schwandter, Alexandre Graell i Amat, Gerald Matz et al
2012 7th International Symposium on Turbo Codes and Iterative Information Processing, ISTC 2012, Gothenburg, 27 - 31 August 2012, p. 46-50
Conference paper - peer reviewed
2012

Making WOM Codes Decodable using Short Synchronous WOM Codes

Nicolas Bitouzé, Alexandre Graell i Amat, Eirik Rosnes et al
2012 IEEE International Symposium on Information Theory, ISIT 2012. Cambridge, MA, 1- 6 July 2012, p. 1381-1385
Conference paper - peer reviewed
2012

HARQ Feedback in Spectrum Sharing Networks

Behrooz Makki, Alexandre Graell i Amat, Thomas Eriksson et al
IEEE Communications Letters. Vol. 16 (9), p. 1337-1340
Scientific journal article - peer reviewed
2012

Two-level HARQ for turbo coded cooperation: System retransmission gain and optimal time allocation

H. Fares, Alexandre Graell i Amat, C. Langlais et al
IEEE Wireless Communications and Networking Conference, WCNC 2012, Paris, 1-4 April 2012, p. 433-437
Conference paper - peer reviewed
2012

Constellation Optimization for Coherent Optical Channels Distorted by Nonlinear Phase Noise

Christian Häger, Alexandre Graell i Amat, Alex Alvarado et al
Proc. IEEE Global Communications Conference (GLOBECOM) 2012, p. 2870-2875
Conference paper - peer reviewed
2012

Power allocation in repetition time diversity hybrid automatic repeat request feedback

Behrooz Makki, Alexandre Graell i Amat, Thomas Eriksson et al
IEEE Wireless Communications and Networking Conference, WCNC 2012, Paris, 1-4 April 2012, p. 2329-2334
Conference paper - peer reviewed
2012

Analysis and Design of Tuned Turbo Codes

C. Koller, Alexandre Graell i Amat, J. Kliewer et al
IEEE Transactions on Information Theory. Vol. 58 (7), p. 4796-4813
Scientific journal article - peer reviewed
2012

Asymptotically optimal trellis coded modulation systems

Alexandre Graell i Amat, Alex Alvarado, Fredrik Brännström et al
Information Theory and Applications Workshop (ITA) 2012, San Diego, CA [Invited]
Conference paper - non peer reviewed
2012

On the Equivalence of TCM Encoders

Alex Alvarado, Alexandre Graell i Amat, Fredrik Brännström et al
2012 IEEE International Symposium on Information Theory, ISIT 2012. Cambridge, MA, 1 - 6 July 2012, p. 2401-2405
Conference paper - peer reviewed
2011

Coding

Gerhard Bauch, Claude Berrou, David Declercq et al
Error Control Coding for B3G/4G Wireless Systems: Paving the Way to IMT-Advanced Standards, Wiley, p. 1-46
Chapter in monograph, book
2011

Performance Analysis of 3-D Turbo Codes

Eirik Rosnes, Alexandre Graell i Amat,
IEEE Transactions on Information Theory. Vol. 57 (6), p. 3707-3720
Scientific journal article - peer reviewed
2011

Distributed Serially Concatenated Codes for Multi-Source Cooperative Relay Networks

Roua Youssef, Alexandre Graell i Amat,
IEEE Transactions on Wireless Communications. Vol. 10 (1), p. 253-263
Scientific journal article - peer reviewed
2011

Error probability bounds for decode-and-forward relaying with two correlated sources

S. Schwandter, H. Farès, Alexandre Graell i Amat et al
IEEE Global Telecommunications Conference (GLOBECOM 2011), Houston, TX, USA, p. 1-5
Conference paper - peer reviewed
2011

MIMO systems for turbo coded cooperation over orthogonal and non-orthogonal channels

H. Farès, S. O. Mohamed, C. Langlais et al
11th International Conference on ITS Telecommunications, ITST 2011, St. Petersburg, 23-25 August 2011, p. 453-457
Conference paper - peer reviewed
2011

Pseudocodewords of linear programming decoding of 3-dimensional turbo codes

Alexandre Graell i Amat, Eirik Rosnes, Michael Helmling et al
2011 IEEE International Symposium on Information Theory Proceedings, ISIT 2011, St. Petersburg, 31 July - 5 August 2011, p. 1643-1647
Conference paper - peer reviewed
2011

Unifying Analysis and Design of Rate-Compatible Concatenated Codes

Alexandre Graell i Amat, Lars K. Rasmussen, Fredrik Brännström et al
IEEE Transactions on Communications. Vol. 59 (2), p. 343-351
Scientific journal article - peer reviewed
2011

On the Minimum Distance Properties of Weighted Nonbinary Repeat Multiple-Accumulate Codes

Alexandre Graell i Amat, Eirik Rosnes,
2011 Information Theory and Applications Workshop
Conference paper - peer reviewed
2007

A general structure for rate-compatible concatenated codes

Fredrik Brännström, Alexandre Graell i Amat, Lars K. Rasmussen et al
IEEE Communications Letters. Vol. 11 (5), p. 437-439
Scientific journal article - peer reviewed
2007

On the design of rate-compatible serially concatenated convolutional codes

Alexandre Graell i Amat, Fredrik Brännström, Lars K. Rasmussen et al
European Transactions on Telecommunications. Vol. 18 (5), p. 519-527
Scientific journal article - peer reviewed
2006

Design of Rate-Compatible Serially Concatenated Convolutional Codes

Alexandre Graell i Amat, Fredrik Brännström, Lars K. Rasmussen et al
International Symposium on Turbo Codes and Related Topics, Munich, Germany, April 2006
Conference paper - peer reviewed
2006

Analysis and Design of Concatenated Codes

Fredrik Brännström, Alexandre Graell i Amat, Lars K. Rasmussen et al
NEWCOM-ACoRN Joint Workshop, Vienna, Austria, Sept. 2006
Conference paper - peer reviewed