M.Sc. Alex Jäger
Technische Universität München
Lehrstuhl für Nachrichtentechnik (Prof. Kramer)
Postadresse
Theresienstr. 90
80333 München
- Tel.: -
- Raum: 0104.03.411
- E-Mail: alex.jaeger@tum.de
Biografie
I received my B.Eng. degree from the University of Applied Sciences Konstanz (HTWG) in 2020, and subsequently obtained my M.Sc. degree from the Technical University of Munich (TUM) in 2022.
During my Masters thesis, I conducted research on the topic of achievable information rates for space-division multiplexed short-reach fiber-optic communication systems using direct-detection receivers, while staying with the Optical Networks Group (ONG) at University College London (UCL).
Forschung
Due to the presence of Kerr nonlinearities, a closed-form expression for the input-output relation of the fiber-optic channel cannot be derived, rendering the channel capacity indeterminate. Digital signal processing techniques, such as digital back-propagation, have been proposed as a means of mitigating nonlinear and linear fiber effects.
However, in wavelength switched networks, where receivers are only able to access their specific channel of interest and not interfering channels, only intra-channel effects, such as self-phase modulation, can be mitigated. As a result, cross-phase modulation remains a significant source of distortion in the received signal.
The nonlinear distortions that remain are typically modeled as correlated phase noise and inter-symbol interference within the channel of interest. My research focuses on developing coding schemes and receivers capable of mitigating these distortions.
Lehre
Scientific Seminar on Coding and Cryptography, Scientific Seminar on Digital Communications, Scientific Seminar on Optical Communications (ST 2025)
Nachrichtentechnik (ST 2024)
Machine Learning for Communications (WT 2023/24, WT 2024/25)
Digital Signal Processing for Optical Communication Systems (ST 2023)
Angebotene Abschlussarbeiten
Laufende Abschlussarbeiten
Practical Evaluation of a QSFP-DD800 Interface
Beschreibung
The objective is to provide an interface for a fly-over solution between an FPGA and the QSFP-DD800 Connector.
Betreuer:
Real-time Data Streaming Architecture for Automotive Testbench Traffic
Beschreibung
The project aims to design a software framework that optimizes the decoding and streaming of automotive Ethernet traffic in real time, applies filtering to reduce redundant data, and enables efficient storage and analysis in a cloud environment.
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Publikationen
2025
- Information rates of successive interference cancellation for optical fiber. IEEE J. Sel. Areas Commun. 43 (5), 2025, 1484-1497 mehr… Volltext ( DOI )
2024
- A Tutorial on Methods for Message Passing with Continuous Variables. ICE Summer Doctoral Seminar, 2024 mehr…
- Challenges and Research Trends for Fiber-Optic Communication Systems. CoC Industry Day, 2024 mehr…
- Successive Interference Cancellation for Optical Fiber Using Discrete Constellations. European School of Information Theory (ESIT), 2024 mehr…
- Successive interference cancellation for optical fiber using discrete constellations. European Conference on Optical Communications (ECOC), 2024 mehr… Volltext ( DOI )
2023
- Bounding the Capacity of Fiber-Optic Channels. 20th Joint Workshop on Communications and Coding (JWCC), 2023 mehr…
2022
- Achievable Rates for Space-Division Multiplexed Optical Channels with Direct Detection. 6G-Life Project Work Package Workshop, 2022 mehr…