Erik Agrell

Professor at Electrical Engineering, Kommunikationssystem, informationsteori och antenner, Communication Systems

Erik Agrell is a Professor in Communication Systems. His research interests belong to the fields of information theory, coding theory, and digital communications. Apart from doing fundamental research in these fields, he also investigates their applications in optical communications, with the overall aim to design more efficient fiber-optical networks. He is a co-founder of the Fiber-Optic Communications Research Center (FORCE) at Chalmers, an interdisciplinary research environment where he leads the signals and systems research area.Office: Maskingränd 2, floor 6Ö, room 6411

Source: chalmers.se

Projects

2015–2018

Towards flexible and energi-efficient datacentre networks

Erik Agrell Communication Systems
Houman Rastegarfar Communication Systems
Krzysztof Szczerba Photonics
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

2016–2019

Polarization-aware fiber optic transmisson

Magnus Karlsson Photonics
Erik Agrell Communication Systems
Swedish Research Council (VR)

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)

2015–2018

Technologies for spatial-division multiplexing: The next frontier in optical communications

Peter Andrekson Photonics
Victor Torres Company Photonics
Magnus Karlsson Photonics
Arni Alfredsson Communication Systems
Erik Agrell Communication Systems
Swedish Research Council (VR)

2011–2013

Theory and algorithms for fiber-optical intensity channels

Erik Agrell Communication Systems
Magnus Karlsson Photonics
Johnny Karout Communication Systems
Swedish Research Council (VR)

2010–2013

Elastic Optical Networks

Erik Agrell Communication Systems
Magnus Karlsson Photonics
VINNOVA

2014–2017

Optical Fiber Interference is Not Noise

Erik Agrell Communication Systems
Magnus Karlsson Photonics
Giuseppe Durisi Communication Systems
Kamran Keykhosravi Communication Systems
Swedish Research Council (VR)

2013–2016

Adaptive optical networks: Theory and algorithms for system optimization

Erik Agrell Communication Systems
Henk Wymeersch Communication Systems
Peter Andrekson Photonics
Magnus Karlsson Photonics
Li Yan Communication Systems
Cristian Bogdan Czegledi Communication Systems
Swedish Research Council (VR)

8 publications exist
2011–2014

Power-efficient terabit/s transmission

Peter Andrekson Photonics
Magnus Karlsson Photonics
Henk Wymeersch Communication Systems
Erik Agrell Communication Systems
Swedish Research Council (VR)

There might be more projects where Erik Agrell participates, but you have to be logged in as a Chalmers employee to see them.

Publications

2017

Pilot Distributions for Phase Tracking in Space-Divison Multiplexed Systems

Arni Alfredsson, Erik Agrell, Henk Wymeersch et al
Paper in proceedings
2017

High Capacity Transmission Systems Using Homogeneous Multi-Core Fibers

Benjamin Puttnam, R. S. Luis, Erik Agrell et al
Journal of Lightwave Technology. Vol. 35 (6), p. 1157-1167
Journal article
2017

A Tighter Upper Bound on the Capacity of the Nondispersive Optical Fiber Channel

Kamran Keykhosravi, Giuseppe Durisi, Erik Agrell
Paper in proceedings
2017

Capacity scaling of flexible optical networks with nonlinear impairment

Li Yan, Erik Agrell
19th International Conference on Transparent Optical Networks, ICTON 2017, Girona, Catalonia, Spain, 2-6 July 2017
Paper in proceedings
2017

Phase-Noise Compensation for Spatial-Division Multiplexed Transmission

Arni Alfredsson, Erik Agrell, Henk Wymeersch et al
Optical Fiber Communication Conference, OFC 2017; Los Angeles Convention Center, Los Angeles; United States; 19 March 2015 through 23 March 2017, p. Th4C.7-
Paper in proceedings
2017

Modified Digital Backpropagation Accounting for Polarization-Mode Dispersion

Cristian Bogdan Czegledi, Gabriele Liga, Domaniç Lavery et al
Paper in proceedings
2017

Pilot Distributions for Phase Tracking in Space-Divison Multiplexed Systems

Arni Alfredsson, Erik Agrell, Henk Wymeersch et al
Paper in proceedings
2017

Multicast scheduling for optical data center switches with tunability constraints

Kamran Keykhosravi, Houman Rastegarfar, Erik Agrell
2017 International Conference on Computing, Networking and Communications, ICNC 2017, p. 308-312
Conference contribution
2017

Scalability analysis methodology for passive optical interconnects in data center networks using PAM

R. Lin, Krzysztof Szczerba, Erik Agrell et al
Optics Communications. Vol. 403, p. 283-289
Journal article
2017

Multidimensional Modulation and Coding in Optical Transport

Magnus Karlsson, Erik Agrell
Journal of Lightwave Technology. Vol. PP (99), p. 7582378-
Journal article
2017

Joint Assignment of Power, Routing, and Spectrum in Static Flexible-Grid Networks

Li Yan, Erik Agrell, Madushanka Nishan Dharmaweera et al
Journal of Lightwave Technology. Vol. 35 (10), p. 1766-1774
Journal article
2017

Multicast Scheduling for Optical Data Center Switches with Tunability Constraints

Kamran Keykhosravi, Houman Rastegarfar, Erik Agrell
International Conference on Computing, Networking and Communications (ICNC), Silicon Valley, USA, Jan 2017,, p. 5-
Paper in proceedings
2017

Achievable rates of multidimensional multisphere distributions

Johnny Karout, J. Karout, Erik Agrell et al
Optics InfoBase Conference Papers. Vol. Part F40-OFC 2017, p. Article no 7937455-
Paper in proceedings
2017

Optical Circuit Granularity Impact in TCP-Dominant Hybrid Data Center Networks

Houman Rastegarfar, Kamran Keykhosravi, Krzysztof Szczerba et al
International Conference on Computing, Networking and Communications (ICNC 2017), p. 318-322
Paper in proceedings
2017

PAM Performance Analysis in Multicast-Enabled Wavelength-Routing Data Centers

Houman Rastegarfar, Li Yan, Krzysztof Szczerba et al
Journal of Lightwave Technology. Vol. 35 (13), p. 2569-2579
Journal article
2017

On the spectral efficiency limits of crosstalk-limited homogeneous single-mode multi-core fiber systems

R. S. Luis, Benjamin Puttnam, G. Rademacher et al
Optics InfoBase Conference Papers. Vol. Part F53-Networks 2017, p. NeTu2B.2-
Paper in proceedings
2017

Digital backpropagation accounting for polarization-mode dispersion

Cristian Bogdan Czegledi, Gabriele Liga, Domaniç Lavery et al
Optics Express. Vol. 25 (3), p. 1903-1915
Journal article
2017

High-capacity MCF transmission with wideband comb

Benjamin Puttnam, R. S. Luis, G. Rademacher et al
Optics InfoBase Conference Papers. Vol. Part F40-OFC 2017, p. M2J.4-
Paper in proceedings
2017

A Novel Demodulation Scheme for a Memoryless Optical Interference Channel

Kamran Keykhosravi, Erik Agrell
Paper in proceedings
2017

On the limits of digital back-propagation in the presence of transceiver noise

Lidia Galdino, Daniel Semrau, Domaniç Lavery et al
Optics Express. Vol. 25 (4), p. 4564-4578
Journal article
2017

Temporal Stochastic Channel Model for Absolute Polarization State and Polarization-Mode Dispersion

Cristian Bogdan Czegledi, Magnus Karlsson, Pontus Johannisson et al
2017 Optical Fiber Communications Conference and Exhibition (OFC), p. Th3F.2 -
Paper in proceedings
2017

Network performance trade-Off in optical spatial division multiplexing data centers

Li Yan, M. Fiorani, A. Muhammad et al
2017 Optical Fiber Communications Conference and Exhibition (OFC), Los Angeles, 19-23 March 2017. Vol. Part F40-OFC 2017, p. W3D.5-
Paper in proceedings
2017

An impairment-aware resource allocation scheme for dynamic elastic optical networks

Madushanka Nishan Dharmaweera, Li Yan, Magnus Karlsson et al
Optics InfoBase Conference Papers. Vol. Part F40-OFC 2017, p. paper Th2A.19-
Paper in proceedings
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
Journal article
2016

Stochastic Digital Backpropagation with Residual Memory Compensation

Naga Vishnukanth Irukulapati, D. Marsella, Pontus Johannisson et al
Journal of Lightwave Technology. Vol. 34 (2), p. 566-572
Journal article
2016

Ultra-Wideband Nonlinearity Compensation Performance in the Presence of PMD

Gabriele Liga, Cristian Bogdan Czegledi, Tianhua Xu et al
42nd European Conference on Optical Communication, ECOC 2016; Dusseldorf; Germany; 18 September 2016 through 22 September 2016, p. 794-796
Paper in proceedings
2016

Achievable information rates of nonbinary codes for optical fiber transmission

Gabriele Liga, Alex Alvarado, Polina Bayvel et al
IEEE Photonics Conference (IPC), Waikoloa; US, 2 - 6 October 2016, p. 309-310
Paper in proceedings
2016

Multidimensional Modulation and Coding

Magnus Karlsson, Erik Agrell
Paper in proceedings
2016

Parallel improved Schnorr-Euchner enumeration SE++ on shared and distributed memory systems, with and without extreme pruning

Fábio Correia, Artur Mariano, Alberto Proença et al
Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications. Vol. 7 (4), p. 1-19
Journal article
2016

Polarization-Mode Dispersion Aware Digital Backpropagation

Cristian Bogdan Czegledi, Gabriele Liga, Domaniç Lavery et al
42nd European Conference on Optical Communication, ECOC 2016; Dusseldorf; Germany; 18 September 2016 through 22 September 2016, p. 1091-1093
Paper in proceedings
2016

Replacing the Soft-Decision FEC Limit Paradigm in the Design of Optical Communication Systems

A. Alvarado, Erik Agrell, Domaniç Lavery et al
Journal of Lightwave Technology. Vol. 34 (2), p. 707-721
Journal article
2016

Polarization Drift Channel Model for Coherent Fibre-Optic Systems

Cristian Bogdan Czegledi, Magnus Karlsson, Erik Agrell et al
Scientific Reports. Vol. 6, p. 21217-
Journal article
2016

Roadmap of optical communications

Erik Agrell, Magnus Karlsson, A. R. Chraplyvy et al
Journal of Optics. Vol. 18 (6)
Journal article
2016

Corrections to "Replacing the soft-decision FEC limit paradigm in the design of optical communication systems"

A. Alvarado, Erik Agrell, D. Lavery et al
Journal of Lightwave Technology. Vol. 34 (2), p. 722-
Journal article
2016

Sensitivity Comparison of Time Domain Hybrid Modulation and Rate Adaptive Coding

Li Yan, Erik Agrell, Henk Wymeersch
Optical fiber communication conference, 2016, p. W1l-3
Paper in proceedings
2016

Parallel Improved Schnorr-Euchner Enumeration SE++ for the CVP and SVP

Fabio Correia, Artur Mariano, Alberto Proenca et al
24th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing, PDP 2016, Heraklion, Crete, Greece, 17-19 February 2016, p. 596-603
Paper in proceedings
2016

Impact of 4D Channel Distribution on the Achievable Rates in Coherent Optical Communication Experiments

Tobias Eriksson, Tobias Fehenberger, Peter Andrekson et al
Journal of Lightwave Technology. Vol. 34 (9), p. 2256-2266
Journal article
2016

Modulation Format Independent Joint Polarization and Phase Tracking for Coherent Receivers

Cristian Bogdan Czegledi, Erik Agrell, Magnus Karlsson et al
Journal of Lightwave Technology. Vol. 13 (14), p. 3354-3364
Journal article
2016

Regenerator site selection in impairment-aware elastic optical networks

Madushanka Nishan Dharmaweera, Li Yan, Magnus Karlsson et al
Paper in proceedings
2016

Stochastic Digital Backpropagation with Residual Memory Compensation

Naga Vishnukanth Irukulapati, D. Marsella, Pontus Johannisson et al
Journal of Lightwave Technology. Vol. 34 (2), p. 566-572
Journal article
2016

A Deterministic Construction and Density Evolution Analysis for Generalized Product Codes

Christian Häger, Henry D. Pfister, Alexandre Graell i Amat et al
Conference contribution
2016

Nonlinear-Impairments- and Crosstalk-Aware Resource Allocation Schemes for Multicore-Fiber-based Flexgrid Networks

Madushanka Nishan Dharmaweera, Li Yan, Magnus Karlsson et al
Paper in proceedings
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
Journal article
2016

Polarization Drift Channel Model for Coherent Fibre-Optic Systems

Cristian Bogdan Czegledi, Magnus Karlsson, Erik Agrell et al
Scientific Reports. Vol. 6, p. 21217-
Journal article
2016

Traffic-grooming- and multipath-routing-enabled impairment-aware elastic optical networks

Madushanka Nishan Dharmaweera, J. Zhao, Li Yan et al
Journal of Optical Communications and Networking. Vol. 8 (2), p. 58-70
Journal article
2016

Pb/s, homogeneous, single-mode, multi-core fiber systems

Benjamin J. Puttnam, Ruben S. Luís, Jun Sakaguchi et al
42nd European Conference on Optical Communication, ECOC 2016; Dusseldorf; Germany; 18 September 2016 through 22 September 2016, p. 208-210
Paper in proceedings
2016

Multidimensional Optimized Optical Modulation Formats

Magnus Karlsson, Erik Agrell
Enabling Technologies for High Spectral-efficiency Coherent Optical Communication Networks, Ch. 2, p. 13-64
Chapter in monograph, book - peer reviewed
2016

Joint-Polarization Phase-Noise Estimation and Symbol Detection for Optical Coherent Receivers

Arni Alfredsson, Rajet Krishnan, Erik Agrell
Journal of Lightwave Technology. Vol. 34 (18), p. 4394-4405
Journal article
2016

Implications of information theory in optical fibre communications

Erik Agrell, A. Alvarado, F. R. Kschischang
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. Vol. 374 (2062)
Journal article
2016

Improved Achievable Information Rates by Optimized Four-Dimensional Demappers in Optical Transmission Experiments

Tobias Fehenberger, Tobias Eriksson, Alex Alvarado et al
Paper in proceedings
2016

Multidimensional modulation formats for coherent optical communications

Tobias Eriksson, Erik Agrell, Magnus Karlsson
Journal of Logic and Computation (977403)
Conference contribution
2016

To overcome the scalability limitation of passive optical interconnects in datacentres

Rui Lin, Krzysztof Szczerba, Erik Agrell et al
Paper in proceedings
2016

Information rates of next-generation long-haul optical fiber systems using coded modulation

Gabriele Liga, Alex Alvarado Segovia, Erik Agrell et al
Journal of Lightwave Technology. Vol. PP (99), p. Art. no. 7553569-
Journal article
2015

Information-theory-friendly models for fiber-optic channels: A primer

Erik Agrell, Giuseppe Durisi, Pontus Johannisson
Paper in proceedings
2015

Four-Dimensional Coded Modulation with Bit-Wise Decoders for Future Optical Communications

Alex Alvarado, Erik Agrell
Journal of Lightwave Technology. Vol. 33 (10), p. 1993-2003
Journal article
2015

Nonlinear impairment aware resource allocation in elastic optical networks

Juzi Zhao, Henk Wymeersch, Erik Agrell
2015 Optical Fiber Communications Conference and Exhibition, OFC 2015; Los Angeles; United States; 22 March 2015 through 26 March 2015. Vol. June 2015 (7121502)
Paper in proceedings
2015

Resource Allocation for Flexible-Grid Optical Networks With Nonlinear Channel Model

Li Yan, Erik Agrell, Henk Wymeersch et al
Journal of Optical Communications and Networking. Vol. 7 (11), p. B101-B108
Journal article
2015

Four-Dimensional Estimates of Mutual Information in Coherent Optical Communication Experiments

Tobias Eriksson, Tobias Fehenberger, Norbert Hanik et al
Paper in proceedings
2015

A simple strategy for mitigating XPM in nonlinear WDM optical systems

D. Marsella, M. Secondini, Erik Agrell et al
Paper in proceedings
2015

Power Consumption of Hybrid EDFA/Raman Amplified Systems

Lars Lundberg, Pontus Johannisson, Erik Agrell et al
Paper in proceedings
2015

Code Rate Optimization in Elastic Optical Networks

Juzi Zhao, Li Yan, Erik Agrell et al
Paper in proceedings
2015

Link-Level Resource Allocation for Flexible-Grid Nonlinear Fiber-Optic Communication Systems

Li Yan, Erik Agrell, Henk Wymeersch et al
IEEE Photonics Technology Letters. Vol. 27 (12), p. 1250-1253
Journal article
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-
Paper in proceedings
2015

On the Use of Factor Graphs in Optical Communications

Henk Wymeersch, Naga Vishnukanth Irukulapati, D. Marsella et al
2015 Optical Fiber Communications Conference and Exhibition, OFC 2015; Los Angeles; United States; 22 March - 26 March 2015. Vol. 2015-June (7122132)
Paper in proceedings
2015

Resource Allocation in Nonlinear Flexible-Grid Fiber-Optic Networks

Li Yan, Henk Wymeersch, Erik Agrell
2015 Optical Fiber Communications Conference and Exhibition, OFC 2015; Los Angeles; United States; 22-26 March 2015, p. 7121834-
Paper in proceedings
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
Journal article
2015

Experimental Investigation of a Four-Dimensional 256-ary Lattice-based Modulation Format

Tobias Eriksson, Saleem Alreesh, Carsten Schmidt-Langhorst et al
2015 Optical Fiber Communications Conference and Exhibition, OFC 2015, Los Angeles, United States, 22-26 March 2015, p. 7122133-
Paper in proceedings
2015

Nonlinear Impairment-Aware Static Resource Allocation in Elastic Optical Networks

Juzi Zhao, Henk Wymeersch, Erik Agrell
Journal of Lightwave Technology. Vol. 33 (22), p. 4554-4564
Magazine article
2015

Replacing the Soft-Decision FEC Limit Paradigm in the Design of Optical Communication Systems

A. Alvarado, Erik Agrell, D. Lavery et al
Journal of Lightwave Technology. Vol. 33 (20), p. 4338-4352
Journal article
2015

Experimental investigation of a 16-dimensional modulation format for long-haul multi-core fiber transmission

G. Rademacher, Benjamin J. Puttnam, Ruben S. Luís et al
Paper in proceedings
2015

Power Optimization in Nonlinear Flexible-Grid Optical Networks

Li Yan, Juzi Zhao, Erik Agrell et al
Paper in proceedings
2015

LDPC codes for optical channels: Is the "FEC limit" a good predictor of post-FEC BER?

Alex Alvarado, Erik Agrell, Domaniç Lavery et al
2015 Optical Fiber Communications Conference and Exhibition, (OFC) 2015, Los Angeles, United States, 22-26 March 2015, p. 7121706-
Paper in proceedings
2015

On Parameter Optimization for Staircase Codes

Christian Häger, Alexandre Graell i Amat, Henry D. Pfister et al
Paper in proceedings
2015

Backward particle message passing

Henk Wymeersch, Naga Vishnukanth Irukulapati, Isaac A. Sackey et al
16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2015; KTH Royal Institute of TechnologyStockholm; Sweden; 28 June 2015 through 1 July 2015, p. 450-454
Paper in proceedings
2015

Conditions for a Monotonic Channel Capacity

Erik Agrell
IEEE Transactions on Communications. Vol. 63 (3), p. 738-748
Journal article
2015

Linear block-coding across >5 Tb/s PDM-64QAM spatial-super-channels in a 19-core fiber

Benjamin J. Puttnam, Ruben S. Luís, José-M. Delgado Mendinueta et al
Paper in proceedings
2015

Influence of Behavioral Models on Multiuser Channel Capacity

Erik Agrell, Magnus Karlsson
Journal of Lightwave Technology. Vol. 33 (17), p. 3507-3515
Journal article
2015

Symbol-by-Symbol Joint Polarization and Phase Tracking in Coherent Receivers

Cristian Bogdan Czegledi, Erik Agrell, Magnus Karlsson
Paper in proceedings
2015

Optimum detection in presence of nonlinear distortions with memory

Gabriele Liga, Alex Alvarado, Erik Agrell et al
Paper in proceedings
2015

Coherent transmission channels as 4d rotations

Magnus Karlsson, Cristian Bogdan Czegledi, Erik Agrell
Signal Processing in Photonic Communications, SPPCom 2015; Omni Parker HouseBoston; United States; 27 June 2015 through 1 July 2015, p. SpM3E.2-
Paper in proceedings
2015

Single parity check-coded 16QAM over spatial superchannels in multicore fiber transmission

Tobias Eriksson, R. S. Luis, Benjamin Puttnam et al
Optics Express. Vol. 23 (11), p. 14569-14582
Journal article
2014

K-Over-L Multidimensional Position Modulation

Tobias Eriksson, Pontus Johannisson, Benjamin Puttnam et al
Journal of Lightwave Technology. Vol. 32 (12), p. 2254-2262
Journal article
2014

Energy efficient modulation formats for multi-core fibers

Benjamin Puttnam, J.-M. Delgado Mendinueta, R. S. Luis et al
19th OptoElectronics and Communications Conference, OECC 2014 and the 39th Australian Conference on Optical Fibre Technology, ACOFT 2014; Melbourne, VIC; Australia; 6 - 10 Jul. 2014, p. 694-696
Paper in proceedings
2014

Coded Modulation for Fiber-Optic Networks

Lotfollah Beygi, Erik Agrell, J. M. Kahn et al
IEEE Signal Processing Magazine
Journal article
2014

Modulation formats for multi-core fiber transmission

Benjamin Puttnam, Tobias Eriksson, J.M. Delgado Mendinueta et al
Optics Express. Vol. 22 (26), p. 32457-32469
Journal article
2014

Stochastic Digital Backpropagation

Naga Vishnukanth Irukulapati, Henk Wymeersch, Pontus Johannisson et al
IEEE Transactions on Communications. Vol. 62 (11), p. 3956-3968
Journal article
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
Paper in proceedings
2014

Experimental comparison of PS-QPSK and LDPC-coded PM-QPSK with equal spectral efficiency in WDM transmission

Tobias Eriksson, Pontus Johannisson, Erik Agrell et al
2014 European Conference on Optical Communication, ECOC 2014; Cannes; France; 21 September 2014 through 25 September 2014, p. Art. no. 6964035-
Paper in proceedings
2014

Sensing or Transmission: Causal Cognitive Radio Strategies with Censorship

Kasra Haghighi, Erik Ström, Erik Agrell
IEEE Transactions on Wireless Communications. Vol. 13 (6), p. 3031-3041
Journal article
2014

Capacity of a nonlinear optical channel with finite memory

Erik Agrell, Alex Alvarado, Giuseppe Durisi et al
Journal of Lightwave Technology. Vol. 32 (16), p. 2862-2876
Journal article
2014

Single parity check multi-core modulation for power efficient spatial super-channels

Benjamin Puttnam, J. M. D. Mendinueta, R. S. Luis et al
2014 European Conference on Optical Communication, ECOC 2014; Cannes; France; 21 September 2014 through 25 September 2014, p. Art. no. 6964197-
Paper in proceedings
2014

Bandlimited Power-Efficient Signaling for Intensity Modulation

Cristian Bogdan Czegledi, M Reza Khanzadi, Erik Agrell
European Conference on Optical Communication, ECOC 2014; Cannes; France; 21 September 2014 through 25 September 2014, p. Art. no. 6963983-
Paper in proceedings
2014

Modeling of Nonlinear Signal Distortion in Fiber-Optic Networks

Pontus Johannisson, Erik Agrell
Journal of Lightwave Technology. Vol. 32 (23), p. 3942-3950
Journal article
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
Journal article
2014

Bandlimited Power-Efficient Signaling and Pulse Design for Intensity Modulation

Cristian Bogdan Czegledi, M Reza Khanzadi, Erik Agrell
IEEE Transactions on Communications. Vol. 62 (9), p. 3274-3284
Journal article
2014

High-SNR Asymptotics of Mutual Information for Discrete Constellations With Applications to BICM

A. Alvarado, Fredrik Brännström, Erik Agrell et al
IEEE Transactions on Information Theory. Vol. 60 (2), p. 1061-1076
Journal article
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-
Paper in proceedings
2014

On Maximum Likelihood Sequence Detectors for Single-channel Coherent Optical Communications

Naga Vishnukanth Irukulapati, D. Marsella, Pontus Johannisson et al
2014 European Conference on Optical Communication, ECOC 2014; Cannes; France; 21 September 2014 through 25 September 2014, p. Art. no. 6964134-
Paper in proceedings
2014

On the Asymptotic Performance of Bit-Wise Decoders for Coded Modulation

Mikhail Ivanov, Alex Alvarado, Fredrik Brännström et al
IEEE Transactions on Information Theory. Vol. 60 (5), p. 2796-2804
Journal article
2014

Rate-Adaptive Coded Modulation for Fiber-Optic Communications

Lotfollah Beygi, Erik Agrell, J. M. Kahn et al
Journal of Lightwave Technology. Vol. 32 (2), p. 333-343
Journal article
2014

Achievable rates for four-dimensional coded modulation with a bit-wise receiver

A. Alvarado, Erik Agrell
Technical Digest Series: Optical Fiber Communication Conference, OFC 2014; San Francisco, CA; United States; 9 March 2014 through 13 March 2014, p. paper M2C.1.-
Paper in proceedings
2014

A Simple Approximation for the Bit-Interleaved Coded Modulation Capacity

A. Alvarado, Fredrik Brännström, Erik Agrell
IEEE Communications Letters. Vol. 18 (3), p. 495-498
Journal article
2014

Biorthogonal modulation in 8 dimensions experimentally implemented as 2PPM-PS-QPSK

Tobias Eriksson, Pontus Johannisson, Erik Agrell et al
Technical Digest Series: Optical Fiber Communication Conference, OFC 2014; San Francisco, CA; United States; 9 March 2014 through 13 March 2014, p. Art. no. 6886984-
Paper in proceedings
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
Journal article
2013

On the Exact BER of Bit-Wise Demodulators for One-Dimensional Constellations

Mikhail Ivanov, Fredrik Brännström, Alex Alvarado et al
IEEE Transactions on Communications. Vol. 61 (4), p. 1450-1459
Journal article
2013

Extending Digital Backpropagation to Account for Noise

Naga Vishnukanth Irukulapati, Henk Wymeersch, Pontus Johannisson et al
Proc. of 39th European Conference and Exhibition on Optical Communication (ECOC 2013) (622 CP), p. We.3.C.4-
Paper in proceedings
2013

Comparison of Intersymbol Interference Power Penalties for OOK and 4-PAM in Short-Range Optical Links

Krzysztof Szczerba, Petter Westbergh, Erik Agrell et al
Journal of Lightwave Technology. Vol. 31 (22), p. 3525-3534
Journal article
2013

Subset-Optimized Polarization-Multiplexed PSK for Fiber-Optic Communications

Martin E Sjödin, Erik Agrell, Magnus Karlsson
IEEE Communications Letters. Vol. 17 (5), p. 838-840
Journal article
2013

Nonlinear fiber capacity

Erik Agrell
39th European Conference and Exhibition on Optical Communication, ECOC 2013; London; United Kingdom; 22 September 2013 through 26 September 2013 (622 CP), p. 630-632
Paper in proceedings
2013

35.2 Gbps 8-PAM transmission over 100 m of MMF using an 850 nm VCSEL

Krzysztof Szczerba, Magnus Karlsson, Peter Andrekson et al
Proc. European Conference on Optical Communication (ECOC) (622 CP), p. 744-746
Paper in proceedings
2013

WDM channel capacity and its dependence on multichannel adaptation models

Erik Agrell, Magnus Karlsson
Paper in proceedings
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
Journal article
2013

Experimental Demonstration of an Optimized 16-ary Four-Dimensional Modulation Format Using Optical OFDM

Johnny Karout, Xiang Liu, S Chandrasekhar et al
Optical Fiber Communication Conference, OCF 13, p. OW3B.4-
Paper in proceedings
2013

MCRB for Timing and Phase Offset for Low-Rate Optical Communication with Self-Phase Modulation

Debarati Sen, Henk Wymeersch, Naga Vishnukanth Irukulapati et al
IEEE Communications Letters. Vol. 17 (5), p. 1004-1007
Journal article
2013

Signal Shaping for BICM at Low SNR

Erik Agrell, Alex Alvarado
IEEE Transactions on Information Theory. Vol. 59 (4), p. 2396-2410
Journal article
2013

High-SNR Asymptotics of Mutual Information for Discrete Constellations

Alex Alvarado, Fredrik Brännström, Erik Agrell et al
IEEE International Symposium on Information Theory (ISIT) 2013, Istanbul, Turkey, p. 2274-2278
Paper in proceedings
2013

Frequency and polarization switched QPSK

Tobias Eriksson, Pontus Johannisson, Martin E Sjödin et al
39th European Conference and Exhibition on Optical Communication, ECOC 2013; London; United Kingdom; 22 September 2013 through 26 September 2013 (622 CP), p. 816-818
Paper in proceedings
2013

Methodology for Power-Aware Coherent Receiver Design

Tauseef Ahmad, Yun Ai, Pavithra Muralidharan et al
Advanced Photonics Congress (SPPCom) 2013, p. SPT4D.4-
Paper in proceedings
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
Journal article
2013

On nonlinearly-induced noise in single-channel optical links with digital backpropagation

Lotfollah Beygi, Naga Vishnukanth Irukulapati, Erik Agrell et al
Optics Express. Vol. 21 (22), p. 26376-26386
Journal article
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
Paper in proceedings
2012

Achieving the Shannon Limit with Probabilistically Shaped BICM

Erik Agrell, Alex Alvarado
2012 IEEE International Symposium on Information Theory, ISIT 2012. Cambridge, MA, 1- 6 July 2012, p. 2421-2425
Paper in proceedings
2012

Optimized lattice-based 16-level subcarrier modulation for IM/DD systems

Krzysztof Szczerba, Johnny Karout, Magnus Karlsson et al
2012 38th European Conference and Exhibition on Optical Communications, ECOC 2012; Amsterdam; Netherlands; 16 September 2012 through 20 September 2012, p. Art. no. 6705904-
Paper in proceedings
2012

Modulation method and apparatus for amplitude- or intensity-modulated communication systems

Johnny Karout, Gerhard Kramer, Frank R. Kschischang et al
Patent application
2012

4-PAM for high-speed short-range optical communications

Krzysztof Szczerba, Petter Westbergh, Johnny Karout et al
Journal of Optical Communications and Networking. Vol. 4 (11), p. 885-894
Journal article
2012

Adaptive Coded Modulation for Nonlinear Fiber-Optical Channels

Lotfollah Beygi, Erik Agrell, Magnus Karlsson
2012 IEEE Globecom Workshops, Anaheim, USA, 3-7 December 2012, p. 331-335
Paper in proceedings
2012

Asymptotically optimal trellis coded modulation systems

Alexandre Graell i Amat, Alex Alvarado, Fredrik Brännström et al
Conference contribution
2012

General BER Expression for One-Dimensional Constellations

Mikhail Ivanov, Fredrik Brännström, Alex Alvarado et al
IEEE Transactions on Communications
Paper in proceedings
2012

Spectrally efficient four-dimensional modulation

Magnus Karlsson, Erik Agrell
2012 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), Los Angeles, CA, Mar. 4 - 8 [Invited], p. Art. no. 6192053-
Paper in proceedings
2012

Bandlimited Intensity Modulation

M. Tavan, Erik Agrell, Johnny Karout
IEEE Transactions on Communications. Vol. 60 (11), p. 3429-3439
Journal article
2012

Modified Cramer-Rao Bound for Clock Recovery in the Presence of Self-Phase Modulation

Ahmet Serdar Tan, Henk Wymeersch, Pontus Johannisson et al
Journal of Lightwave Technology. Vol. 30 (16), p. 2556-2562
Magazine article
2012

Optimizing Constellations for Single-Subcarrier Intensity-Modulated Optical Systems

Johnny Karout, Erik Agrell, Krzysztof Szczerba et al
IEEE Transactions on Information Theory. Vol. 58 (7), p. 4645-4659
Journal article
2012

Constellation Optimization for Coherent Optical Channels Distorted by Nonlinear Phase Noise

Christian Häger, Alexandre Graell i Amat, Alex Alvarado et al
Journal of Logic and Computation, p. 2870-2875
Paper in proceedings
2012

A Two-Dimensional Signal Space for Intensity-Modulated Channels

Johnny Karout, G. Kramer, F. R. Kschischang et al
IEEE Communications Letters. Vol. 16 (9), p. 1361-1364
Journal article
2012

First-order asymptotics of the BICM mutual information: Uniform vs. nonuniform distributions

Erik Agrell, Alex Alvarado
Information Theory and Applications Workshop (ITA) 2012, San Diego, CA [Invited], p. 306 - 310
Paper in proceedings
2012

The Limits of Digital Backpropagation in Nonlinear Coherent Fiber-Optical Links

Lotfollah Beygi, Erik Agrell, Pontus Johannisson et al
2012 38th European Conference and Exhibition on Optical Communications, ECOC 2012; Amsterdam; Netherlands; 16 September 2012 through 20 September 2012, p. Art. no. 6706029-
Paper in proceedings
2012

On Optimum Causal Cognitive Spectrum Reutilization Strategy

Kasra Haghighi, Erik Ström, Erik Agrell
IEEE Journal on Selected Areas in Communications. Vol. 30 (10), p. 1911-1921
Journal article
2012

Continuous-Amplitude Modulation for Optical Wireless Channels

Johnny Karout, Gerhard Kramer, Frank R. Kschischang et al
Proc. IEEE Photonics Society Summer Topical Meetings, PSST 2012, Seattle, WA: 9 through11 July 2012 (Article number 6280801), p. 167-168
Paper in proceedings
2012

Comparison of 128-SP-QAM with PM-16-QAM

Martin E Sjödin, Pontus Johannisson, Jianqiang Li et al
Optics Express. Vol. 20 (8), p. 8356-8366
Journal article
2012

A Discrete-Time Model for Uncompensated Single-Channel Fiber-Optical Links

Lotfollah Beygi, Erik Agrell, Pontus Johannisson et al
IEEE Transactions on Communications. Vol. 60 (11), p. 3440-3450
Journal article
2012

Comparison of 128-SP-QAM with PM-16-QAM

Martin E Sjödin, Pontus Johannisson, Jianqiang Li et al
Optics Express. Vol. 20 (8), p. 8356-8366
Journal article
2012

Satellite constellations: Towards the nonlinear channel capacity

Erik Agrell, Magnus Karlsson
25th IEEE Photonics Conference, IPC 2012, Burlingame, 23 - 27 September 2012 [Invited], p. 316-317
Paper in proceedings
2011

Optimization of 16-point Ring Constellations in the Presence of Nonlinear Phase Noise

Lotfollah Beygi, Erik Agrell, Magnus Karlsson
Optical Fiber Communication Conference and Exposition (OFC) and The National Fiber Optic Engineers Conference (NFOEC), p. OThO4-
Paper in proceedings
2011

Power efficient modulation schemes [Invited book chapter]

Magnus Karlsson, Erik Agrell
Chapter in monograph, book - peer reviewed
2011

Stochastic Backpropagation for Coherent Optical Communications

Nan Jiang, Yan Gong, Johnny Karout et al
European Conference and Exposition on Optical Communications, ECOC 2011; Geneva; Switzerland; 18 September 2011 through 22 September 2011
Paper in proceedings
2011

Performance Comparison of Differential 8-Ary Modulation Formats in High-Speed Optical Transmission Systems

Ekawit Tipsuwannakul, Pontus Johannisson, Mats Sköld et al
Journal of Lightwave Technology. Vol. 29 (19), p. 2954-2962
Journal article
2011

High SNR Bounds for the BICM Capacity

Alex Alvarado, Fredrik Brännström, Erik Agrell
IEEE Information Theory Workshop ITW 2011, Paraty, Brazil, p. 360-364
Paper in proceedings
2011

Designing Power-Efficient Modulation Formats for Noncoherent Optical Systems

Johnny Karout, Erik Agrell, Krzysztof Szczerba et al
Journal of Logic and Computation
Paper in proceedings
2011

Strictly Bandlimited ISI-Free Transmission Over Intensity-Modulated Channels

M. Tavan, Erik Agrell, Johnny Karout
Journal of Logic and Computation
Paper in proceedings
2011

Performance Comparison between 120 Gbit/s RZ-DQP-ASK and RZ-D8PSK over a 480 km Link

Ekawit Tipsuwannakul, Magnus Karlsson, Erik Agrell et al
Optical Fiber Communication Conference, OFC 2011; Los Angeles, CA; United States; 6 March 2011 through 10 March 2011, p. OMI5-
Paper in proceedings
2011

Signal Statistics in Fiber-Optical Channels with Polarization Multiplexing and Self-Phase Modulation

Lotfollah Beygi, Erik Agrell, Magnus Karlsson et al
Journal of Lightwave Technology. Vol. 29 (16), p. 2379 - 2386
Journal article
2011

30 Gbps 4-PAM transmission over 200m of MMF using an 850 nm VCSEL

Krzysztof Szczerba, Petter Westbergh, Johan Gustavsson et al
2011 37th European Conference on Optical Communication (ECOC); 18-22 Sept. 2011; Geneva, p. 1-3
Paper in proceedings
2011

Generalized pulse-position modulation for optical power-efficient communication

Magnus Karlsson, Erik Agrell
37th European Conference on Optical Communication and Exhibition, ECOC 2011, Geneva, 18 September 2011 through 22 September 2011
Paper in proceedings
2011

On BICM receivers for TCM transmission

Alex Alvarado, Leszek Szczecinski, Erik Agrell
IEEE Transactions on Communications. Vol. 59 (10), p. 2692-2702
Journal article
2011

On the performance of BICM with trivial interleavers in nonfading channels

Alex Alvarado, Leszek Szczecinski, Erik Agrell
IEEE International Conference on Communications ICC 2011
Paper in proceedings
2011

Demonstration of 8-level subcarrier modulation sensitivity improvement in an IM/DD system

Krzysztof Szczerba, Johnny Karout, Erik Agrell et al
European Conference and Exposition on Optical Communications, ECOC 2011; Geneva; Switzerland; 18 September 2011 through 22 September 2011
Paper in proceedings
2011

Modified constant modulus algorithm for polarization-switched QPSK

Pontus Johannisson, Martin E Sjödin, Magnus Karlsson et al
Optics Express. Vol. 19 (8), p. 7734-7741
Journal article
2011

Filter Optimization for Self-Homodyne Coherent WDM Systems using Interleaved Polarization Division Multiplexing

Martin E Sjödin, Erik Agrell, Pontus Johannisson et al
Journal of Lightwave Technology. Vol. 29 (9), p. 1219 - 1226
Journal article
2011

Convergence Comparison of the CMA and ICA for Blind Polarization Demultiplexing

Pontus Johannisson, Henk Wymeersch, Martin E Sjödin et al
Journal of Optical Communications and Networking. Vol. 3 (6), p. 493-501
Journal article
2011

Faster Recursions in Sphere Decoding

Arash Ghasemmehdi, Erik Agrell
IEEE Transactions on Information Theory. Vol. 57 (6), p. 3530-3536
Journal article
2011

An ML-based Detector for Optical Communication in the Presence of Nonlinear Phase Noise

Ahmet Serdar Tan, Henk Wymeersch, Pontus Johannisson et al
2011 IEEE International Conference on Communications, ICC 2011; Kyoto; Japan; 5 June 2011 through 9 June 2011, p. Art. no. 5962741-
Paper in proceedings
2011

An LLR-based Cognitive Transmission Strategy for Higher Spectrum Reutilization

Kasra Haghighi, Erik Ström, Erik Agrell
Paper in proceedings
2011

Multilevel pulse-position modulation for optical power-efficient communication

Magnus Karlsson, Erik Agrell
Optics Express. Vol. 19 (26), p. B799-B804
Journal article
2011

Optimal Alphabets and Binary Labelings for BICM at Low SNR

Erik Agrell, Alex Alvarado
IEEE Transactions on Information Theory. Vol. 57 (10), p. 6650-6672
Journal article
2011

Experimental comparison of modulation formats in IM/DD links

Krzysztof Szczerba, Johnny Karout, Petter Westbergh et al
Optics Express. Vol. 19 (10), p. 9881-9889
Journal article
2011

On the symbol error probability of regular polytopes

Erik Agrell, Magnus Karlsson
IEEE Transactions on Information Theory. Vol. 57 (6), p. 3411-3415
Journal article
2011

CMA Misconvergence in Coherent Optical Communication for Signals Generated from a Single PRBS

Johnny Karout, Henk Wymeersch, Ahmet Serdar Tan et al
Paper in proceedings
2011

30 Gbps 4-PAM transmission over 200m of MMF using an 850 nm VCSEL

Krzysztof Szczerba, Petter Westbergh, Johnny Karout et al
Optics Express. Vol. 19 (26), p. B203-B208
Journal article
2010

Convergence Comparison of CMA and ICA for Blind Polarization Demultiplexing of QPSK and 16-QAM Signals

Pontus Johannisson, Henk Wymeersch, Martin E Sjödin et al
Paper in proceedings
2010

Corrections to 'Bit-interleaved coded modulation in the wideband regime'

Alex Alvarado, Erik Agrell, Albert Guillén i Fàbregas et al
IEEE Transactions on Information Theory. Vol. 56 (12), p. 6513-
Journal article
2010

Modulation scheme [Patent application]

Johnny Karout, Krzysztof Szczerba, Erik Agrell
Patent application
2010

Exploiting UEP in QAM-based BICM: Interleaver and Code Design

Alex Alvarado, Erik Agrell, Leszek Szczecinski et al
IEEE Transactions on Communications. Vol. 58 (2), p. 500-510
Journal article
2010

Operational Regime of Symbol-by-Symbol Phase Noise Estimation for POLMUX 16-QAM

Fangrong Peng, Henk Wymeersch, Ahmet Serdar Tan et al
Paper in proceedings
2010

On BICM-ID with Multiple Interleavers

Alex Alvarado, Leszek Szczecinski, Erik Agrell et al
IEEE Communications Letters. Vol. 14 (9), p. 785-787
Journal article
2010

Interleaved Polarization Division Multiplexing in Self-Homodyne Coherent WDM Systems

Martin E Sjödin, Erik Agrell, Guo-Wei Lu et al
Paper in proceedings
2010

A novel multilevel coded modulation scheme for fiber optical channel with nonlinear phase noise

Lotfollah Beygi, Erik Agrell, Pontus Johannisson et al
Paper in proceedings
2010

A novel subcarrier modulation scheme for the optical intensity channel [Patent application]

Johnny Karout, Krzysztof Szczerba, Erik Agrell
Patent application
2010

A novel rate allocation method for multilevel coded modulation

Lotfollah Beygi, Erik Agrell, Magnus Karlsson et al
International symposium on information theory, p. 1983-1987
Paper in proceedings
2010

Four-Dimensional Optimized Constellations for Coherent Optical Transmission Systems

Magnus Karlsson, Erik Agrell
36th European Conference on Optical Communication, Turin, Italy [Invited], p. We.8.C.3-
Paper in proceedings
2010

Electronic dispersion compensation by Hadamard transformation

Fahd Ahmed Khan, Erik Agrell, Magnus Karlsson
Optical Fiber Communication Conference, San Diego, CA, p. paper OWV4-
Paper in proceedings
2010

On the dimensionality of multilevel coded modulation in the high SNR regime

Lotfollah Beygi, Erik Agrell, Magnus Karlsson
IEEE Communications Letters. Vol. 14 (11), p. 1056-1058
Journal article
2010

The Impact of Self-Phase Modulation on Digital Clock Recovery in Coherent Optical Communication

Ahmet Serdar Tan, Henk Wymeersch, Pontus Johannisson et al
Paper in proceedings
2010

Wideband Sequential Spectrum Sensing with Varying Thresholds

Kasra Haghighi, Erik Agrell, Arne Svensson
Paper in proceedings
2010

Power efficient subcarrier modulation for intensity modulated channels

Johnny Karout, Erik Agrell, Magnus Karlsson
Optics Express. Vol. 18 (17), p. 17913-17921
Journal article
2010

Constellation optimization for coherent optical transmission systems

Magnus Karlsson, Erik Agrell
Proc. IEEE Photonics Society Annual Meeting, Denver, CO [Invited], p. 152-153
Paper in proceedings
2010

Data transmission system and method [Patent application]

Erik Agrell, Martin E Sjödin
Patent application
2009

On the Capacity of BICM with QAM Constellations

Alex Alvarado, Erik Agrell, Arne Svensson
Proceedings International Wireless Communications and Mobile Computing Conference, IWCMC'09, Leipzig, Germany [Invited], p. 573-579
Paper in proceedings
2009

Which is the most power-efficient modulation format in optical links?

Magnus Karlsson, Erik Agrell
Optics Express. Vol. 17 (13), p. 10814-10819
Journal article
2009

Synchronization-free communications [Patent application]

Erik Agrell, Martin E Sjödin
Patent application
2009

Correcting Suboptimal Metrics in Iterative Decoders

Alex Alvarado, Víctor Núñez, Leszek Szczecinski et al
Proceedings IEEE International Conference on Communications ICC 2009, Dresden, Germany
Paper in proceedings
2009

Unequal Error Protection in BICM with QAM Constellations: Interleaver and Code Design

Alex Alvarado, Erik Agrell, Leszek Szczecinski et al
Proceedings IEEE International Conference on Communications ICC 2009, Dresden, Germany
Paper in proceedings
2009

On optimal constellations for BICM at low SNR

Erik Agrell, Alex Alvarado
Proceedings IEEE Information Theory Workshop ITW 2009, Taormina, Italy [Best Poster Award], p. 480-484
Paper in proceedings
2009

Power-efficient modulation formats in coherent transmission systems

Erik Agrell, Magnus Karlsson
Journal of Lightwave Technology. Vol. 27 (22), p. 5115-5126
Journal article
2009

Intersymbol interference in DQPSK fibre-optic systems

Hongxia Zhao, Erik Agrell, Magnus Karlsson
European Transactions on Telecommunications. Vol. 20 (8), p. 758-769
Journal article
2008

Trellis-Coded Modulation in Fiber-Optic Communications

Hongxia Zhao, Erik Agrell, Magnus Karlsson
Report
2008

Unequal bit error probabiltiy in coherent QPSK fiber-optic systems using phase modulator based transmitters

Hongxia Zhao, Erik Agrell, Magnus Karlsson
European Transactions on Telecommunications. Vol. 19 (8), p. 895-906
Journal article
2008

On the Design of Interleavers for BICM Transmission

Alex Alvarado, Leszek Szczecinski, Erik Agrell et al
Paper in proceedings
2008

Unequal bit error probabiltiy in coherent QPSK fiber-optic systems using phase modulator based transmitters

Hongxia Zhao, Erik Agrell, Magnus Karlsson
European Transactions on Telecommunications. Vol. 19 (8), p. 895-906
Journal article
2007

Gray coding for multilevel constellations in Gaussian noise

Erik Agrell, Johan Lassing, Erik Ström et al
IEEE Transactions on Information Theory. Vol. 53 (1), p. 224-235
Journal article
2007

Transmitter comparison and unequal bit error probabilities in coherent QPSK systems

Hongxia Zhao, Magnus Karlsson, Erik Agrell
Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference, p. OTuH2-
Paper in proceedings
2006

PSK bit mappings with good minimax error probability

Erik Agrell, Erik Ström
Paper in proceedings
2006

Performance comparison of optical 8-ary differential phase-shift keying systems with different electrical decision schemes: Comment

Erik Agrell, Magnus Karlsson
Optics Express. Vol. 14 (4), p. 1700-1701
Journal article
2006

Fiber communications using convolutional coding and bandwidth-efficient modulation

Torsten Wuth, Erik Agrell, Magnus Karlsson et al
Optics Express. Vol. 14 (2), p. 542-555
Journal article
2006

Trellis-Coded Modulation in PSK and DPSK Communications

Hongxia Zhao, Erik Agrell, Magnus Karlsson
European Conference on Optical Communication, p. 1-2
Paper in proceedings
2005

Performance of Coded Single-Band Carrier-Based DS-SS Systems on IEEE 802.15.3a UWB Channels

Matts-Ola Wessman, Arne Svensson, Erik Agrell
Proceedings IEEE International Conference on Ultra-Wideband, Zürich, Switzerland, p. 152-157
Paper in proceedings
2005

Improvement of DPSK transmission by using convolutional error correction coding

Torsten Wuth, Erik Agrell, Magnus Karlsson
Optical Fiber Communication Conference, 2005. Technical Digest. OFC/NFOEC. Vol. 4, p. 534-536
Paper in proceedings
2005

Design and performance of carrier-based direct-sequence ultra-wideband systems

Matts-Ola Wessman, Arne Svensson, Erik Agrell
Report
2005

Optimality of the binary reflected Gray code for the Gaussian channel

Johan Lassing, Erik Agrell, Erik Ström et al
Report
2005

Bit error probability of coherent M-ary PSK over flat Rayleigh fading channels

Johan Lassing, Erik Ström, Erik Agrell et al
IEE Electronic Letters. Vol. 41 (21), p. 1186-1187
Journal article
2005

Bit error probability of coherent M-ary PSK over flat Rayleigh fading channels

Johan Lassing, Erik Agrell, Erik Ström et al
Report
2005

Optimal lattices for sampling

Hans R. Künsch, Erik Agrell, Fred A. Hamprecht
IEEE Transactions on Information Theory. Vol. 51 (2), p. 634-647
Journal article
2004

On the optimality of the binary reflected Gray code

Erik Agrell, Johan Lassing, Erik Ström et al
IEEE Transactions on Information Theory. Vol. 50 (12), p. 3170-3182
Journal article
2004

The binary reflected Gray code is optimal for M-PSK

Erik Agrell, Johan Lassing, Erik Ström et al
Proc. IEEE International Symposium on Information Theory, Chicago, Illinois, USA, p. 164-
Paper in proceedings
2004

Frequency Diversity Performance of Coded Multiband-OFDM Systems on IEEE UWB Channels

Matts-Ola Wessman, Arne Svensson, Erik Agrell
Proceedings IEEE Vehicular Technology Conference Fall, Los Angeles, California, USA. Vol. 2, p. 1197-1201
Paper in proceedings
2003

Computation of the Exact Bit Error Rate of Coherent M-ary PSK with Gray Code Bit Mapping

Johan Lassing, Erik Ström, Erik Agrell et al
Paper in proceedings
2003

Optimal lattices for interpolation of stationary random fields

Hans R. Künsch, Erik Agrell, Fred A. Hamprecht
Report
2003

The exact symbol and bit error probabilities of coherent M-ary PSK

Johan Lassing, Erik Ström, Tony Ottosson Gadd et al
Proceedings International Symposium on Information Theory, Yokohama, Japan, p. 11-
Paper in proceedings
2003

Unequal Bit-Error Protection in Coherent M-ary PSK

Johan Lassing, Erik Ström, Erik Agrell et al
Proceedings IEEE Vehicular Technology Conference Fall, Orlando, Florida, USA. Vol. 1, p. 251-256
Paper in proceedings
2003

On the duality between low-rate and high-rate sampling

Erik Agrell, Fred A. Hamprecht, Hans R. Künsch
Proc. IEEE International Symposium on Information Theory, Yokohama, Japan, p. 211-
Paper in proceedings
2003

Exploring a space of materials: Spatial sampling design and subset selection

Fred A. Hamprecht, Erik Agrell
Experimental Design for Combinatorial and High Throughput Materials Development / edited by Jamed N. Cawse [Invited], p. 277-307
Chapter in monograph, book - peer reviewed
2003

Computation of the Exact Bit-Error Rate of Coherent M-ary PSK With Gray Code Bit Mapping

Johan Lassing, Erik Ström, Erik Agrell et al
IEEE Transactions on Communications. Vol. 51 (11), p. 1758-1760
Journal article
2002

Closest point search in lattices

Erik Agrell, Thomas Eriksson, Alexander Vardy et al
IEEE Transactions on Information Theory. Vol. 48 (8), p. 2201-2214
Journal article
2001

A table of upper bounds for binary codes

Erik Agrell, Alexander Vardy, Kenneth Zeger
IEEE Transactions on Information Theory. Vol. 47 (7), p. 3004-3006
Journal article
2000

Upper bounds for constant-weight codes

Erik Agrell, Alexander Vardy, Kenneth Zeger
IEEE Transactions on Information Theory. Vol. 46 (7), p. 2373-2395
Journal article
2000

Constant-weight code bounds from spherical code bounds

Erik Agrell, Alexander Vardy, Kenneth Zeger
Proc. IEEE International Symposium on Information, Sorrento, Italy, p. 391-
Paper in proceedings
2000

Closest point search in lattices

Erik Agrell, Thomas Eriksson, Alexander Vardy et al
Report
1998

Image compression in San Diego

Erik Agrell
SIMO-bulletinen [Invited] (2), p. 4-5
Magazine article
1998

Optimization of lattices for quantization

Erik Agrell, Thomas Eriksson
IEEE Transactions on Information Theory. Vol. 44 (5), p. 1814-1828
Journal article
1998

On the Voronoi neighbor ratio for binary linear block codes

Erik Agrell
IEEE Transactions on Information Theory. Vol. 44 (7), p. 3064-3072
Journal article
1997

Voronoi-Based Coding

Erik Agrell
Doctoral thesis
1996

The Hadamard transform - a tool for index assignment

Petter Knagenhjelm, Erik Agrell
IEEE Transactions on Information Theory. Vol. 42 (4), p. 1139-1151
Journal article
1996

Lattice-based quantization, Part I

Erik Agrell, Thomas Eriksson
Report
1996

Lattice-based quantization, Part II

Thomas Eriksson, Erik Agrell
Report
1996

Voronoi regions for binary linear block codes

Erik Agrell
IEEE Transactions on Information Theory. Vol. 42 (1), p. 310-316
Journal article
1995

ML optimal CDMA multiuser receiver

Erik Agrell, Tony Ottosson Gadd
Electronics Letters. Vol. 31 (18), p. 1554-1555
Journal article
1994

How to evaluate search methods for vector quantization

Erik Agrell, Per Hedelin
Journal of Logic and Computation, p. 258-263
Paper in proceedings
1993

A method for examining vector quantizer structures

Erik Agrell
Proc. IEEE Int. Symposium on Information Theory, San Antonio, Texas, USA, p. 394-
Paper in proceedings
1993

Spectral coding by fast vector quantization

Erik Agrell
Proc. IEEE Workshop on Speech Coding for Telecommunications, Sainte-Adèle, Québec, Canada, p. 61-62
Paper in proceedings