Picture of Lorenz Welter

M.Sc. Lorenz Welter

Technical University of Munich

Associate Professorship of Coding and Cryptography (Prof. Wachter-Zeh)

Postal address

Postal:
Theresienstr. 90
80333 München

Biography

  • Since March 2019 Research Assistant and PhD candidate in the "Coding and Cryptography" group (Prof. Wachter-Zeh) at the Institute for Communications Engineering, Technical University of Munich
  • M.Sc. Electrical Engineering and Information Technology, Karlsruhe Institute of Technology, 2018
  • Study abroad, Telecommunications Engineering, Polytechnic University of Catalonia, 02-07/2016
  • B.Sc. Electrical Engineering and Information Technology, Karlsruhe Institute of Technology, 2015

Theses

Available Theses

Theses in Progress

Magnetic DNA random access memory with nanopore readouts and exponentially-scaled combinatorial addressing

Description

Nowadays, synthetic DNA can be used as a storage medium. Several experiments have been conducted, providing proof-of-concepts. The authors of [1] present a new decoding technique that works on the raw signals of the biological sequencer when retrieving stored data. This method was partially already presented in [2].

The student's task is to understand the working flow of DNA-based data storage. Further, one needs to understand the error-correction mechanisms and the specific overall experimental setup of [1]. The pros and cons of this scheme have to be evaluated and discussed.

[1] Lau, B., Chandak, S., Roy, S., Tatwawadi, K., Wootters, M., Weissman, T., & Ji, H. P. (2023). Magnetic DNA random access memory with nanopore readouts and exponentially-scaled combinatorial addressing. Scientific Reports, 13(1), 8514.

https://www.nature.com/articles/s41598-023-29575-z

[2] Chandak, S., Neu, J., Tatwawadi, K., Mardia, J., Lau, B., Kubit, M., ... & Ji, H. (2020, May). Overcoming high nanopore basecaller error rates for DNA storage via basecaller-decoder integration and convolutional codes. In ICASSP 2020-2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) (pp. 8822-8826). IEEE.

https://www.biorxiv.org/content/biorxiv/early/2020/02/13/2019.12.20.871939.full.pdf

 

Supervisor:

Publications

2023

  • Maarouf, I.; Lenz, A.; Welter, L.; Wachter-Zeh, A.; Rosnes, E.; Graell i Amat, A.: Concatenated Codes for Multiple Reads of a DNA Sequence. IEEE Transactions of Information Theory 69 (2), 2023 more…
  • Welter, L.; Maarouf, I.; Lenz, A.; Wachter-Zeh, A. ; Rosnes, E.; Graell i Amat, A.: Index-Based Concatenated Codes for the Multi-Draw DNA Storage Channel. IEEE Information Theory Workshop (ITW), IEEE, 2023 more… Full text ( DOI )

2022

  • Welter, L.: Concatenated Codes for the Multi-Draw IDS Channel. 2022 IEEE European School of Information Theory (ESIT), 2022 more…
  • Welter, L.: Concatenated Codes for the Multi-Draw IDS Channel. TUM ICE Workshop Raitenhaslach, 2022 more…
  • Welter, L.: Concatenated Codes for the Multi-Draw IDS Channel. Munich Workshop on Coding and Cryptography 2022, 2022 more…
  • Welter, L.; Bitar, R.; Wachter-Zeh, A.; Yaakobi, E.: Multiple Criss-Cross Insertion and Deletion Correcting Codes. IEEE Transactions of Information Theory 68 (6), 2022 more…

2021

  • Bitar, R.; Welter, L.; Wachter-Zeh A.; Yaakobi, E.: Criss-Cross Insertion and Deletion Correcting Codes. IEEE Transactions on Information Theory Vol. 67;Issue 12, 2021 more… Full text ( DOI )
  • Lenz, A.; Maarouf, I.; Welter, L.; Wachter-Zeh, A.; Rosnes, E.; Graell i Amat, A.: Concatenated Codes for Recovery From Multiple Reads of DNA Sequences. IEEE Information Theory Workshop 2020, 2021 more…
  • Maringer, G.; Polianskii, N.; Vorobyev, I.; Welter, L.: Feedback Insertion-Deletion Codes. IEEE Information Theory Workshop 2020, 2021 more…
  • Maringer, G.; Polyanskii, N.; Vorobyev, I.; Welter, L.: Feedback Insertion-Deletion Codes. Problems of Information Transmission Vol. 57, 2021 more… Full text ( DOI )
  • Welter, L.; Bitar, R.; Wachter-Zeh A.; Yaakobi, E.: Multiple Criss-Cross Deletion-Correcting Codes. IEEE International Symposium on Information Theory 2021, 2021 more…

2020

  • Bitar R.; Smagloy I.; Welter L.; Wachter-Zeh A.; Yaakobi E.: Criss-Cross Deletion Correcting Codes. International Symposium on Information Theory and its Applications, 2020 more…
  • Lenz, A.; Welter, L.; Puchinger S.: Achievable Rates of Concatenated Codes in DNA Storage under Substitution Errors. IEEE International Symposium on Information Theory and its Applications (ISITA), 2020 more…
  • Smagloy I.; Welter, L.; Wachter-Zeh A.; Yaakobi E.: Single-Deletion Single-Substitution Correcting Codes. IEEE International Symposium on Information Theory (ISIT), 2020 more…
  • Welter, L.: Criss Cross Deletion Correcting Codes. Workshop on Coding, Cooperation, and Security in Modern Communication Networks (COCO), 2020 more…
  • Welter, L.: Single-Deletion Single-Substitution Correcting Codes. IEEE International Symposium on Information Theory (ISIT), 2020 more…

2019

  • Welter, L.: End-to-end MIMO Optimisation using Deep Learning Autoencoders. Joint Workshop on Communications and Coding (JWCC), 2019 more…
  • Welter, L.: On Deletion-Substitution Error Correcting Codes. 2019 Workshop on Coding, Cooperation, and Security in Modern Communication Networks , 2019 more…
  • Welter, L.; Renner, J.; Wachter-Zeh, A.: Coding Theory for DNA Storage and Cryptography. IAS General Assembly 2019, 2019 more…