Foto von Delcho Donev

Delcho Donev

Technische Universität München

Lehrstuhl für Nachrichtentechnik (Prof. Kramer)

Postadresse

Postal:
Theresienstr. 90
80333 München

Biografie

Ph.D. Student an der TUM seit Februar 2017

M.Sc. in Communications Engineering (2016), TUM

B.Sc. in Telecommunications (2014), Universität „St. Kyrill und Method“ in Skopje, Mazedonien

Abschlussarbeiten

Angebotene Abschlussarbeiten

Bachelorarbeiten

Capacity Bounds for Time and Bandwidth Constraint Transmissions

Capacity Bounds for Time and Bandwidth Constraint Transmissions

Stichworte:
Energy concentration, Prolate Spheroidal Wave Functions, Sphere packing Bound, Sinc pulses, Raised Cosine Pulses

Beschreibung

In Shannon's paper [1], where the sphere packing bound is introduced, it is outlined how to calculate the finite block length capacity for a Gaussian channel if the required parameters are known. However, the transmit waveform is allowed to have infinite duration. We want to examine what happens when we introduce constraints on the energy concentration of the waveform, i.e., most of its energy is concentrated in a time interval T and a bandwidth W. The problem of the maximal energy concentration was solved in [2]. We want to find upper and lower bound for the finite block length capacity with these constraints.

 

[1] C. Shannon, "Probability of error for optimal codes in a Gaussian channel", The Bell System Technical Journal, 1959

[2] D. Slepian, H. O. Pollack, H. J. Landau, "Prolate Spheroidal Wave Functions, Fourier Analysis and Uncertainty I-V", The Bell System Technical Journal, 1961-1978

Voraussetzungen

  • Digital Communications, Digital Communications II
  • Information Theory
  • Python/MATLAB

Kontakt

delcho.donev@tum.de

Betreuer:

Delcho Donev

Forschungspraxis oder MSCE Forschungspraxis

Non-Square Constellations for Adaptive Modulation

Non-Square Constellations for Adaptive Modulation

Beschreibung

Investigation of non-square constellations. Bit-error rates for such constellations for transmissions over the AWGN channel.

Kontakt

delcho.donev@tum.de

Betreuer:

Delcho Donev

Capacity Bounds for Time and Bandwidth Constraint Transmissions

Capacity Bounds for Time and Bandwidth Constraint Transmissions

Stichworte:
Energy concentration, Prolate Spheroidal Wave Functions, Sphere packing Bound, Sinc pulses, Raised Cosine Pulses

Beschreibung

In Shannon's paper [1], where the sphere packing bound is introduced, it is outlined how to calculate the finite block length capacity for a Gaussian channel if the required parameters are known. However, the transmit waveform is allowed to have infinite duration. We want to examine what happens when we introduce constraints on the energy concentration of the waveform, i.e., most of its energy is concentrated in a time interval T and a bandwidth W. The problem of the maximal energy concentration was solved in [2]. We want to find upper and lower bound for the finite block length capacity with these constraints.

 

[1] C. Shannon, "Probability of error for optimal codes in a Gaussian channel", The Bell System Technical Journal, 1959

[2] D. Slepian, H. O. Pollack, H. J. Landau, "Prolate Spheroidal Wave Functions, Fourier Analysis and Uncertainty I-V", The Bell System Technical Journal, 1961-1978

Voraussetzungen

  • Digital Communications, Digital Communications II
  • Information Theory
  • Python/MATLAB

Kontakt

delcho.donev@tum.de

Betreuer:

Delcho Donev

Hauptseminare

Non-Square Constellations for Adaptive Modulation

Non-Square Constellations for Adaptive Modulation

Beschreibung

Investigation of non-square constellations. Bit-error rates for such constellations for transmissions over the AWGN channel.

Kontakt

delcho.donev@tum.de

Betreuer:

Delcho Donev

Laufende Abschlussarbeiten

Bachelorarbeiten

Simulation of a Communications System that uses Prolate Spheroidal Wave Functions

Simulation of a Communications System that uses Prolate Spheroidal Wave Functions

Beschreibung

Investigation of the system performalce when using the Prolate Spheroidal Wave Functions as waveforms.

Betreuer:

Delcho Donev

Student

Fabian Graf

Masterarbeiten

Modeling Complex Communication Channels Using Generative Adversarial Networks

Modeling Complex Communication Channels Using Generative Adversarial Networks

Beschreibung

We use Generative Adversarial Networks (GAN) to model various channels that might arise in a communications system.

Betreuer:

Delcho Donev

Student

Amir Hossein Rezaeitabar

Simulations on 3GPP NR Downlink Resource Allocation

Simulations on 3GPP NR Downlink Resource Allocation

Beschreibung

The new radio (NR) radio access technology standardized by 3GPP shall meet the various requirements set by the ITU to be a IMT-2020 technology better known as 5G. Those requirements, quantified by Key Performance Indicators (KPIs) are manifold, e.g. data throughput, reliability, latency and number of supported users. To fulfill the different requirements various parameters and combinations on the physical layer are allowed, e.g. different bandwidth, subcarrier distance, modulation, number of layers and beamforming. When setting the parameters of the NR system not all KPIs are proportionally enhanced but some rather have an inverse proportion. Hence, each parameter set is a trade-off of different KPIs. As the physical layer specification of 3GPP Rel-15 is about to be completed in June 2018, the possible parameters are available now. This master thesis shall:

  • provide a simulation of the 3GPP NR physical layer DL resource allocation.
  • offer the option to adjust different parameters and provide the results analytically and graphically.
  • investigate extreme cases, e.g. maximum throughput, and analyze their effect on other KPIs.
  • assess and compare the results with regard to the system limitations.

Betreuer:

Delcho Donev - M.Sc. Mithlesh Kumar Sinha and Dr.-Ing. Sandra Merkel (Rhode und Schwarz)

Student

Tobias Winkler

Publikationen

2018

  • Donev, D.; Böcherer, G.: Polar-Coded Pulse Position Modulation for the Poisson Channel. 9th Advanced Satellite Multimedia Systems Conference, Sep 2018 mehr…
  • Donev, D.: The Prolate Spheroidal Wave Functions in Finite Block Length Communications. TUM CoC COM PhD Workshop 2018: Ultra Reliable Low Latency Communications and Applications for 5G, Jul 2018 mehr…
  • Donev, D.; Kramer, G.: Surface and Intersection Area of Spherical Caps on a n-dimensional Hypersphere. 2018 Munich Doctoral Seminar on Communications (MSC), Jul 2018 mehr…
  • Donev, D.: The Prolate Spheroidal Wave Functions in Finite Block Length Communications. 2018 IEEE European School of Information Theory, May 2018 mehr…

2017

  • Donev, D.: Prolate Spheroidal Wave Functions. 18th Joint Workshop on Communications and Coding (JWCC), Mar 2017 mehr…

2016

  • Donev, D.; Böcherer, G.: Polar Codes with Pulse Position Modulation. Internal LNT Workshop , 2016 mehr…