Stefan Schwarz

Asst. Prof. Dipl.-Ing. Dr.techn.
Tel.: +43 (1) 58801 - 38985
Room: CG0416
Address: Gusshausstraße 25 / E389
1040 Wien


Stefan Schwarz was born in Neunkirchen, Austria, in 1984. He received his BSc. in electrical engineering and his Dipl.-Ing. degree (MSc equivalent) in telecommunications engineering with highest distinctions in 2007 and 2009, respectively, both at TU Wien. He also received his Dr. techn. degree (Ph.D. equivalent) in telecommunications engineering with highest distinctions in 2013 at TU Wien. In 2010 he received the honorary price of the Austrian Minister of Science and Research, for excellent graduates of scientific and artistic universities and in 2014 he received the INiTS award in the category Information and Communication Technologies for innovative scientific works with prospect for economic applicability.

From 2008 to 2014 he was working as a project assistant at the Mobile Communications group of Prof Markus Rupp at the Institute of Telecommunications of TU Wien, focusing on link and system level simulation of LTE/LTE-A networks and acting as one of the lead developers of the Vienna LTE Simulators. In 2012 he visited The University of Texas at Austin as research scholar, collaborating with Prof. Robert W. Heath, Jr. on limited feedback algorithms for distributed antenna systems. He is employed as post-doctoral researcher (University Assistant) at the Institute of Telecommunications, leading a contract research project with General Motors on cellular assisted vehicular communications. Since 2016 he is the head of the Christian Doppler Laboratory for Dependable Wireless Connectivity for the Society in Motion. His research interests are located in the broad fields of wireless communications and signal processing. E-mail:

Research Topics

Christian Doppler Laboratory for Dependable Wireless Connectivity for the Society in Motion

  • LTE and 5G link and system level simulations
  • Single-user/multi-user limited feedback systems
  • Manifold signal processing
  • Performance investigations of cellular networks
  • Cellular networks for vehicular communications


  • 389.012 – Computer oriented projects
  • 389.139 – Bachelor Thesis and Seminar

Winter term:

  • 389.168 – Advanced Wireless Communication 1

Summer term:

  • 389.033 – Internationales Seminar Mobile Kommunikation
  • 389.138 – Telekommunikation
  • 389.193 – 5th Generation Wireless Technologies


Publications sorted by media from TU Wien database

Organized Workshops, Special Issues and Special Sessions:

System-level modelling and abstraction for 5G wireless communications, 12th International Symposium on Wireless Communication Systems (ISWCS’15), 25–28 August 2015, Brussels, Belgium

System Level Modeling in Wireless Communications, EURASIP Journal on Wireless Communications and Networking, 2015

1st International Workshop on Link and System Level Simulations (IWSLS2), July 1st 2016, Vienna, Austria

Signal Processing Challenges in 5G Mobile Communications, 25th European Signal Processing Conference (EUSIPCO’17), 28 August – 2 September 2017, Kos, Greece

Recent Advances in Link and System Level Analysis, Simulation and Experimentation for Mobile Wireless Communications, EURASIP Journal on Wireless Communications and Networking, 2018

CD-Lab Related Presentations:

Presentations of the CD-Lab

Reproducible code:

In case a password is required for downloading a file, please just write me an email (

  • Signal Outage Optimized Beamforming for MISO Two-Wave With Diffuse Power Fading Channels, S. Schwarz, 2016: TWDP beamforming (Password: TWDP)
  • Predictive Quantization on the Stiefel Manifold, S. Schwarz and M. Rupp, IEEE Signal Processing Letters vol. 22, issue 2, 2015: Stiefel manifold quantization
  • Maximum Expected Achievable Rate Combinig for Limited Feedback Block-Diagonalization, S. Schwarz and M. Rupp, ICASSP 2015: MERC
  • Transmit Optimization for the MISO Multicast Interference Channel, S. Schwarz and M. Rupp, IEEE Transactions on Communications, 2015: MISO MC-IC


  • Conference presentations:
    • LTE SU-MIMO feedback (WiAd 2010)
    • Linearized scheduling framework for LTE (Asilomar 2010)
    • Multi-user scheduler with variable fairness (ICC 2011)
    • MU-MIMO feedback for ZF beamforming (ICC 2012)
    • MU-MIMO in distributed antenna systems (GLOBECOM 2012)
    • Antenna Combiners for block-diagonalization with limited feedback and excess antennas (ICC 2013)
    • Subspace versus Eigenmode quantization for limited feedback block-diagonalization (ISCCSP 2014)
    • ML Estimation of Population Size when Observing Multiple Fill Levels in Slotted ALOHA (ICASSP 2015)
    • A Tensor LMS Algorithm (ICASSP 2015)
    • System Level Simulation of LTE MBSFN Networks with High Mobility Users (IWSSIP 2015)
    • Performance Evaluation of Low Complexity Double-Sided Massive MIMO Transceivers (CCNC 2016)
    • Gaussian Modeling of Spatially Correlated LOS/NLOS Maps for Mobile Communications (VTC 2016)
    • Limited Feedback based Double-Sided Full-Dimension MIMO for Mobile Backhauling (Asilomar SSC 2016)
    • Multicast Beamforming Capabilities of LTE MBSFN for V2X Communications (VTC Fall 2017)
    • Remote Radio Head Assignment and Beamforming in Dynamic Distributed Antenna Systems (ICC 2018)
    • Signal Outage Optimized Beamforming for MISO TWDP Fading Channels (PIMRC 2018)
  • Posters:
    • LTE SU-MIMO precoder feedback (WSA 2010)
    • Throughput bounds for LTE (SPAWC 2011)
    • LTE-A CSI feeback (SPAWC 2011)
    • MU-MIMO in LTE with adaptive CSI feedback (ICC 2012)
    • MU-MIMO in LTE with CSI feedback prediction and interpolation (EUSIPCO 2012)
    • Subspace quantization for limited feedback block-diagonalization (ICASSP 2013)
    • Maximum expected achievable rate combining for limited feedback block-diagonalization (ICASSP 2015)
    • Predictive quantization on the Stiefel manifold (ICASSP 2015)
    • Leakage-based multicast transmit beamforming (ICC 2015)
    • Convex optimization based geometric beamforming for FD-MIMO Arrays (Asilomar SSC 2016)
    • Outage-Based Admission Control for Multi-User MISO Transmission with Imperfect CSIT (VTC-Fall 2017)
  • Others:
    • DSP Seminar (10.06.2010)
    • DSP Seminar (14.04.2011)
    • DSP Seminar (21.06.2012)
    • DSP Seminar (16.05.2013)
    • Rigorosum (21.11.2013)
    • Wireless Communications Seminar (27.03.2014)
    • LTE Basics (13.10.2015 – Brno)
    • Downlink Link Level Simulator Overview (14.10.2015 – Brno)
    • Research on 5G and Beyond at TU Wien (15.05.2018 – OVE IT Kolloquium)