Picture of Juan Diego Lentner Ibanez

M.Sc. Juan Diego Lentner Ibanez

Technical University of Munich

Chair of Communications Engineering (Prof. Kramer)

Postal address

Postal:
Theresienstr. 90
80333 München

Biography

  • Doctoral Researcher at the Institute of Communications Engineering, Technical University of Munich (since 04/2019)
  • Assistant Research Engineer, Optical Communication Technology Lab., Huawei Technologies France, Paris (09/2018 - 03/2019)
  • M.Sc. in Electrical Engineering, Technical University of Munich (2018)
  • Semester abroad, Technical University of Denmark, Copenhagen (08/2016 - 01/2017)
  • B.Sc. in Electrical Engineering, Technical University of Munich (2015)

Theses

Available Theses

Efficient Block Propagation in Cryptocurrency Networks

Description

Cryptocurrencies like Bitcoin and Ethereum use a decentralized ledger called Blockchain to track transactions. Whenever a new block is added to the Blockchain, the change is spread through the network using a gossip-like protocol. This process is known as block propagation.

To increase scalability, the efficiency of block propagation is crucial. This thesis aims to explore the information theoretic limits of block propagation, derive realistic models based on real data, and investigate innovative and efficient techniques for block propagation.

The thesis will be conducted at the Institute of Communications and Navigation at DLR (German Aerospace Center) in Oberpfaffenhofen.

Prerequisites

Required qualifications are

  • basic knowledge of information theory
  • programming experience in Matlab, C, or python.
  • Interest in cryptocurrencies.

Contact

Interested applicants may contact Dr. Francisco Lázaro via email at francisco.lazaroblasco@dlr.de.

Supervisor:

Juan Diego Lentner Ibanez - Dr. Francisco Lázaro (DLR (German Aerospace Center))

Capacity per Unit Cost

Description

Gallager [1] studied the capacity regions of energy limited channels as in wideband and multi-access communication. He showed that reliable communication over such channels is fundamentally limited by a normalized rate, the capacity per unit energy. Verdu's capacity per unit cost [2] generalizes this concept to channels with arbitrary per-symbol cost functions. Since then, capacity per unit cost has been used to analyze a variety of communication scenarios in research literature.

The student will understand the concept and motivation of capacity per unit cost, and will be able to discuss the differences to Shannon's capacity result. The student will identify and review scenarios in literature where capacity per unit cost has been applied. Finally, the student will choose one of these applications and discuss in more detail how capacity per unit cost relates to this problem and how it helped in solving it.

References:

[1] R. G. Gallager, “Energy limited channels: Coding, multiaccess, and spread spectrum,” Tech. Rep. LIDS-P-1714, Nov. 1987.

[2] S. Verdú, “On channel capacity per unit cost,” IEEE Trans. Inf. Theory, vol. 36, no. 5, pp. 1019–1030, Sep. 1990.

Prerequisites

  1. Strong background in Information Theory.
  2. At least one of the following courses:
  • Mobile communications.
  • Multi-User Information Theory.
  • MIMO Systems.

Supervisor:

Theses in Progress

Publications

2023

  • Lentner, D.; Ben Yacoub, E.; Calabro, S.; Boecherer, G.; Stojanovic, N.; Kramer, G.: Concatenated forward error correction with KP4 and single parity check codes. IEEE/OSA J. Lightw. Technol., 2023, 5641-5652 more… Full text ( DOI )
  • Runge, C.; Wiegart, T.; Lentner, D.: Improved List Decoding for Polar-Coded Probabilistic Shaping. 12th International Symposium on Topics in Coding (ISTC), IEEE, 2023Brest, France more… Full text ( DOI )
  • Wiegart, T.; Wang, L.; Lentner, D.; Wesel, R.D.: Probabilistic Shaping for Asymmetric Channels and Low-Density Parity-Check Codes. International Symposium on Topics in Coding (ISTC), 2023 more…

2022

  • Runge, C.; Wiegart, T.; Lentner, D.; Prinz, T.: Multilevel Binary Polar-Coded Modulation Achieving the Capacity of Asymmetric Channels. IEEE International Symposium on Information Theory (ISIT), 2022Espoo, Finland more… Full text ( DOI )

2021

  • Lentner, D.: Stealth Communication with Vanishing Cost per Symbol. Ferienakademie 2021: Advanced Topics in Information Theory and Communications, 2021 more…

2020

  • Barakatain, M.; Lentner, D.; Böcherer, G.; Kschischang, F.: Performance-Complexity Tradeoffs of Concatenated FEC for Higher-Order Modulation. IEEE/OSA Journal of Lightwave Technology 38 (11), 2020, 2944-2953 more… Full text ( DOI )
  • Lentner, D.: Stealth Communication with Vanishing Power. Workshop on Coding, Cooperation, and Security in Modern Communication Networks (COCO), 2020 more…
  • Lentner, D.; Kramer, G.: Stealth Communication. Munich NewCom Workshop, 2020 more…
  • Lentner, D.; Kramer, G.: Information-Theoretical Limits of Stealth Communication. BGU Seminar on Cooperative Communication, 2020 more…
  • Lentner, D.; Kramer, G.: Stealth Communication with Vanishing Power over Binary Symmetric Channels. International Symposium on Information Theory (ISIT), 2020 more…

2019

  • Barakatain, M.; Lentner, D.; Böcherer, G.; Kschischang, F.: Performance-Complexity Tradeoffs of Concatenated FEC for 64-QAM MLC and BICM. European Conference on Optical Communication (ECOC), 2019 more…
  • Böcherer, G.; Lentner, D.; Cirino, A.; Steiner, F.: Probabilistic Parity Shaping for Linear Codes. Munich Doctoral Seminar on Communications, 2019 more…
  • Lentner, D.; Kramer, G.: Information-Theoretical Limits of Stealth Communication. Workshop on Coding, Cooperation, and Security in Modern Communication Networks (COCO), 2019 more…

2018

  • Lentner Ibañez, Juan Diego: Dirty Paper Coding for Higher-Order Modulation and Finite Constellation Interference. 2018, (other entry) more…

2016

  • Iscan, O.; Lentner, D.; Xu, W.: A Comparison of Channel Coding Schemes for 5G Short Message Transmission. Proc. IEEE Globecom Workshops (GC Wkshps), IEEE, 2016 more… Full text ( DOI )