Erdal Arıkan

Erdal Arıkan
Name	Erdal Arıkan
Birth date	1958
Birth place	Ankara, Turkey
Nationality	Turkish
Fields	Information theory, Electrical engineering, Coding theory
Workplaces	Bilkent University, Bell Labs
Alma mater	Middle East Technical University, California Institute of Technology
Doctoral advisor	John B. Anderson
Known for	Polar codes

Erdal Arıkan Erdal Arıkan is a Turkish electrical engineer and information theorist known for inventing polar codes. He is a professor at Bilkent University and a former researcher at Bell Labs, and his work has influenced modern error-correcting codes used in standards such as 5G. His research intersects with seminal developments by Claude Shannon, Richard Hamming, and Robert Gallager.

Early life and education

Arıkan was born in Ankara and completed undergraduate studies at Middle East Technical University and graduate studies at the California Institute of Technology under advisor John B. Anderson. During his formative years he was exposed to lectures and curricula influenced by figures such as Claude Shannon, Norbert Wiener, Alexander Graham Bell (via institutional lineage), and contemporaries at Bell Labs and AT&T. His doctoral work connected to concepts pioneered by Richard Hamming, Solomon W. Golomb, and David Slepian and built on mathematical foundations articulated by Andrey Kolmogorov and Paul Lévy.

Academic career

Arıkan joined the faculty at Bilkent University after research positions at Bell Labs and collaborations with scholars from Massachusetts Institute of Technology, Stanford University, and University of California, Berkeley. He has taught courses drawing on texts by Robert Gallager, Thomas M. Cover, Joy A. Thomas, I. S. Reed, and Gottfried Ungerboeck. Arıkan supervised students who later joined institutions such as École Polytechnique Fédérale de Lausanne, Imperial College London, and Tsinghua University. He served on program committees for conferences including IEEE International Symposium on Information Theory, Allerton Conference on Communication, Control, and Computing, and Asilomar Conference on Signals, Systems, and Computers.

Polar codes and contributions to information theory

Arıkan introduced polar codes in a 2009 paper that connected to the capacity theorem of Claude Shannon and to constructions by Robert Gallager and Andrew Viterbi. His polarization phenomenon used tools related to work by Arikan's advisor John B. Anderson and analysis techniques reminiscent of Imre Csiszár, János Körner, and Elwyn Berlekamp. Polar codes achieve the symmetric capacity of binary-input discrete memoryless channels with low-complexity successive cancellation decoding, aligning with theoretical directions from Richard Hamming and David Forney. The polar coding framework has been extended and analyzed by researchers including Valerio Scarani (quantum extensions), Igal Tal and Alexander Vardy (successive cancellation list decoding), and incorporated into standards developed by 3GPP, influencing 5G NR deployment. Subsequent work related polar codes to Low-Density Parity-Check codes by Robert Gallager and to Turbo codes by Berrou, Glavieux, and Thitimajshima through performance and implementation trade-offs explored at institutions such as Nokia Bell Labs, Huawei, and Samsung Research. Theoretical links were drawn between channel polarization and concepts from Martingale theory as used by Joseph Doob and Paul Lévy.

Honors and awards

Arıkan's contributions earned recognition including prizes and fellowships associated with organizations such as IEEE and Turkish Academy of Sciences. His polar codes work was highlighted in venues like the IEEE International Symposium on Information Theory and profiled in publications tied to Nature Communications and IEEE Transactions on Information Theory. He has been invited to lecture at institutes including Massachusetts Institute of Technology, École Normale Supérieure, University of Cambridge, The University of Tokyo, and Max Planck Society centers. Committees awarding honors often included members from Royal Society, National Academy of Engineering, and Turkish Rectors' Council.

Selected publications

Arıkan authored foundational papers and surveys cited alongside works by Claude Shannon, Robert Gallager, Thomas M. Cover, Joy A. Thomas, David Forney, and I. S. Reed. Key items include his original polar codes paper and subsequent journal articles in IEEE Transactions on Information Theory and conference proceedings at IEEE ISIT and Allerton Conference. Other influential publications relate to channel polarization theory, finite-length analysis, and decoding algorithms often coauthored or cited with researchers from University of Illinois Urbana–Champaign, University of Oxford, Princeton University, and California Institute of Technology.

Personal life and legacy

Arıkan's academic lineage connects to scholars at Middle East Technical University, California Institute of Technology, and Bilkent University and he is part of a network that includes contributors from Bell Labs, Nokia, and international research centers. His invention of polar codes has shaped standards work at 3GPP, inspired further research at IEEE conferences, and left a lasting influence comparable in scope to milestones by Claude Shannon, Richard Hamming, and Robert Gallager. His students and collaborators continue to advance coding theory at universities and companies such as EPFL, Tsinghua University, Samsung, Huawei, and Intel.

Category:Turkish electrical engineers Category:Information theorists Category:Bilkent University faculty