Events

In this section, the main events of the NAND project are presented.

Selection of the NAND project for the ANR day "recherche créatrice d'innovation"

The NAND project has been selected among 14 projects to illustrate how ANR projects are a motor for innovation ( see here for more details), october 2021.

Link to a video done by the ANR (in French) that presents the project: Youtube).

Patent on a new bit-flipping algorithm

Valentin Savin, from CEA, did a pattent deposal entitled « Méthode de décodage de codes LDPC à inversion de bits et effet inertiel », n° FR2002431, 11/03/2020.

Final report of the NAND project, Nov. 2019

The final report of the NAND project is now available. Except a summary in English, it is written in French.

You can acces the final report here : (final report).

Journée GDR ISIS du 19 Sept. 2019, "Codage, modulation et traitement du signal pour les communications optiques", Paris

Fakhreddine Gafadhi, Franklin Cochanchin and Emmanuel Boutillon gave a talk during the meeting "Codage, modulation et traitement du signal pour les communications optiques" organized by the GDR-ISIS in Paris (19 September 2019). They presented recent results of the NAND project on Parallel Probabilistic Bit Flipping (PPBF) and Sign-Preserving Min-Sum (SP-MS) decoder. You can acces the presentation here ( Presentation).

Modification of task: from Turbo-code demonstrator to LDPC demonstrator

In february 2019, the ANR has validated to replace the development of a Noise Against Noise Turbo-Decoder demonstrator by a NAN-LDPC demonstrator.

Oberpfaffenhofen Workshop on High Throughput Coding (OWHTC)

Emmanuel Boutillon was invited to give a talk to the OWHTC workshop in DRL, Munich. The title of the talk was: "Good LDPC decoders with exchanged messages of size 1, 2 and 3 bits". The talk presented some result on Syndome Bit Flipping (SBF) and Noisy Gradient Descent Bit Flipping algorithm (NGDBF) ( part I) and on Sign-Preserving Min-Sum (SP-MS) deocder ( part II).

December 2018:

Huawei Workshop on Coding for Future Optical Communications.

Following the Turbo-Symposium in Hong Kong, Christophe Jego and Emmanuel Boutillon were invited to give a presentation on the Huawei workshop on Coding for Future Optical Communications.

December 2018:

Turbo-Symposium 2018.

The NAND projet has presented two papers in the 10th Turbo-Symposium: an invited paper for the special session "FEC for Future Communication Systems: Implementation Issues" and one accepted paper for oral presentation:

Chris Winstead, Tasnuva Tithi, Emmanuel Boutillon, Fakhreddine Ghaffari, "Recent Advances on Stochastic and Noise Enhanced Methods in Error Correction Decoders".10th Int. Symp. Turbo Codes & Iter. Inf. Proc. (ISTC 2018), Dec. 2018, Hong Kong. Paper, Presentation
Franklin Cochachin, Emmanuel Boutillon, David Declercq, "Optimization of Sign-Preserving Noise-Aided Min-Sum Decoders with Density Evolution", 10th Int. Symp. Turbo Codes & Iter. Inf. Proc. (ISTC 2018), Dec. 2018, Hong Kong. Paper, Presentation

November 2018:

Visit of Franklin Cochachin at EPLF

In the frame of the NAND projet, Franklin Cochachin, PhD student at UBS, will visit EPFL for a week to do a 28 nm FDSOI Layout chip of a very efficient LDPC decoder (400 Gbit/s of decoding throughput expected).

January 2018:

Arrival of the CEA-LETI in the NAND project

The first january 2018, a new partner has joined the NAND projet: Valentin Savin, from CEA-LETI. Valentin will investigating new Bit Flipping algorithms that keep a history of the previous exchanged messages or their statistics, such that the value of a message may depend on the current, but also on the previous iterations. In the frame of the NAND projet, Franklin Cochachin, PhD student at UBS, will visit EPFL for a week to do a 28 nm FDSOI Layout chip of a very efficient LDPC decoder (400 Gbit/s of decoding throughput expected).

Mars 2017:

Patent on Bit Flipling Algorithm

In the frame of the NAND projet, UBS has patented an original architecture to suppress the remainings error of an iterative decoder. In some cases, the proposed method allows by few orders of magnitude the frame error rate.

November 2017:

Presentation of Chris Winstead "The Benefits of Being Erratic: Correcting Errors with Noise-Enhanced Gradient Algorithms"

During the 2017 5th IEEE Global Conference on Signal and Information Processing, in Montreal, Chris Winstead gave an invited talk untitled "The Benefits of Being Erratic: Correcting Errors with Noise-Enhanced Gradient Algorithms". (slice of the talk available here)

April 2017:

Visits of Emmanuel Boutillon and Fakheddine Ghaffari in USA

In April 2017, Emmanuel Boutillon spent two weeks in Utah State University working with Chris Winstead. In parallel, Fakhreddine Ghaffari spent 3 weeks in Aprithe 2017 5th IEEE Global Conference on Signal and Information Processing

September the 7th 2016:

Plenary talk of David Declercq during the 5th International Symposium on Turbo Code and Iterative Information Processing

During the 5th International Symposium on Turbo Code and Iterative Information Processing, in Brest, France, David Declercq gave an invited talk untitled "Noise-Aided Gradient Descent Bit-Flipping Decoders approaching Maximum Likelihood Decoding". (slice of the talk available here)

During this symposium, the following paper linked to WP2 was also presented:

A. Cassagne, T. Tonnellier, C. Leroux, B. Le Gal, O. Aumage and D. Barthou. "Beyond Gbps Turbo Decoder on Multi-Core CPUs". In Proceedings of the 9th International Symposium on Turbo Codes & Iterative Information Processing (ISTC'16), Brest France, September 2016.

May-June-July 2016

Visit of Chris Winstead in ETIS and Lab-STICC

Chris Winstead is currently visinting ETIS and Lab-STICC for a two months stay to work on WP1 and WP5 of the NAND project.

June the 8th 2016:

GDR-ISIS Day on Energy-Efficiency In Error-Correction Coding

In the frame of the GDR ISIS, David Declecq, Elsa Dupraz and Emmanuel Boutillon organized a special day on Energy-Efficiency In Error-Correction Coding the 8 of june 2016 in Paris.

31 people attended the meeting, from several countries (France (Lab-STICC, ETIS, ENSTA Paris, CEA LETI, IMS), Germany (TU Kaiserslautern),Swiss (EPFL, ETH Zurich), Belgium (IMEC), Findland (Univ. of Turku), USA (Utah Sate Univ.)) and companies (Thales, Huawei, Nokia)

You can find more information on this day on the GDR-ISIS website (here). In the frame of this day, three technical presentations (over 8) were related to the NAND project

Chris Winstead: Energy efficient bit-flipping LDPC decoders

Fakheddine Ghaffari: Hardware Efficient Implementation of Probabilistic Gradient Descent Bit-Flipping

Bertrand Legal: Progress in software implementations of ECC decoders

January the 16, 2016:

NAND Kick-off meeting

The NAND Kick-off meeting was in Lorient January, the 18th 2016.

December the first 2015:

ANR Kick-off meeting

The first of december 2015, all laureats of the generic ANR call in "défi 7, axes 5-9" where invited for a half day seminar at ANR. During this seminar, a very short presentation of the NAND project was done: NAND presentation (in french).