Dr.-Ing. Alexander Fengler

Dr.-Ing. Alexander Fengler

  • Hertzstr. 16
    76187 Karlsruhe

CV

Alexander completed his BSc. and MSc. in Physics, and a BSc. in Mathematics, at the Technical University of Berlin. In 2021 he graduated with a PhD from the Institute of Telecommunication Systems at TU Berlin. From 2022 to 2024 he was a Post-Doc at the Massachusetts Institute for Technology funded by a Walter-Benjamin Fellowship from the German Science Foundation (DFG). In 2024 he worked as a Post-Doc at the German Aerospace Agency (DLR).

Since 2025 Alexander is a junior research group leader here at KIT, funded by the Emmy-Noether program of the DFG

His research areas are:

  • Communication- and Information Theory
  • Channel Coding
  • Multi-User Communication
  • Sparse Receovery and Compressed Sensing
  • Large scale random system analysis 

Lehre

  • Compressed Sensing and Approximate Message Passing: Theory and Applications (Wintersemester)

Current Theses

Theses

Open Theses

Title Supervisor Type

There are currently no open theses.

Theses In Progress

Title Supervisor Type

There are currently no theses in progress.

Full List of Publications

Journal papers

  1. A. Fengler, O. Musa, P. Jung and G. Caire, "Pilot-based unsourced random access with a massive MIMO receiver, interference cancellation, and power control," IEEE J. Sel. Areas Commun., vol. 40, no. 5, pp. 1522-1534, May. 2022
    [ Cite ]  
  2. A. Fengler, P. Jung and G. Caire, "SPARCs for unsourced random access," IEEE Trans. Inf. Theory, vol. 67, no. 10, pp. 6894–6915, Oct. 2021
    [ Cite ]  
  3. A. Fengler, S. Haghighatshoar, P. Jung and G. Caire, "Non-Bayesian activity detection, large-scale fading coefficient estimation, and unsourced random access with a massive MIMO receiver," IEEE Trans. Inf. Theory, vol. 67, no. 5, pp. 2925–2951, May. 2021
    [ Cite ]  

Conference papers

  1. F. Ritter, J. Mandelbaum, A. Fengler, H. Jäkel and L. Schmalen, "Removal of small weight stopping sets for asynchronous unsourced multiple access," Proc. IEEE Int. Symp. Inform. Theory (ISIT), Ann Arbor, MI, USA, Jun. 2025, https://arxiv.org/abs/2501.12186
    [ Cite ]  [ Presentation ]  
  2. A. Fengler, A. Lancho and Y. Polyanskiy, "Coded orthogonal modulation for the multi-antenna MAC," Proc. Intl. Symp. on Topics in Coding (ISTC), Brest, France, Sep. 2023
    [ Cite ]  [ Available here ]  
  3. A. Fengler, A. Lancho, K. Narayanan and Y. Polyanskiy, "On the advantages of asynchrony in the unsourced MAC," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 2523–2528, Jun. 2023
    [ Cite ]  [ Available here ]  
  4. A. Fengler, G. Liva and Y. Polyanskiy, "Sparse graph codes for the 2-user unsourced MAC," Proc. Asilomar Conf. Signals, Systems and Computers, pp. 682–686, Oct. 2022
    [ Cite ]  
  5. A. Lancho, A. Fengler and Y. Polyanskiy, "Finite-blocklength results for the A-channel: Applications to unsourced random access and group testing," Proc. Allerton Annu. Conf. Commun. Control Comp., Sep. 2022
    [ Cite ]  [ Available here ]  
  6. A. Fengler, P. Jung and G. Caire, "Pilot-based unsourced random access with a massive MIMO receiver in the quasi-static fading regime," Proc. IEEE Workshop Signal Process. Advances in Wireless Commun. (SPAWC), Sep. 2021
    [ Cite ]  
  7. A. Fengler, P. Jung and G. Caire, "Unsourced multiuser sparse regression codes achieve the symmetric MAC capacity," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 3001–3006, Jun. 2020, ISSN: 2157-8117
    [ Cite ]  
  8. A. Fengler, S. Haghighatshoar, P. Jung and G. Caire, "Grant-free massive random access with a massive MIMO receiver," Proc. Asilomar Conf. Signals, Systems and Computers, pp. 23–30, Nov. 2019, ISSN: 2576-2303
    [ Cite ]  
  9. A. Fengler, P. Jung and G. Caire, "SPARCs and AMP for unsourced random access," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 2843–2847, Jul. 2019, ISSN: 2157-8117
    [ Cite ]