81 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Polish Academy of SciencesPL26 papers
- University of WarsawPL21 papers
- Brno University of TechnologyCZ14 papers
- Institute of MathematicsPL12 papers
- Institute of PhysicsPL12 papers
- National Institute of Technology DurgapurIN12 papers
- Warsaw University of TechnologyPL11 papers
- Institute of High Pressure PhysicsPL8 papers
- Jagiellonian UniversityPL7 papers
- Institute of Nuclear Physics, Polish Academy of SciencesPL6 papers
- University of Silesia in KatowicePL6 papers
- Częstochowa University of TechnologyPL5 papers
105 papers
How Temporal Dispersion of Radio Channels Depends on Signal Bandwidth
Jarosław Wojtuń, Tomasz Grasza, Cezary Ziółkowski +7
The degree of temporal dispersion of a radio channel is the basis for assessing its transmission capabilities. This paper addresses the practical issue of measuring the temporal pa…
Machine Learning of Quantum Entanglement from Noisy Measurements
Artur Czerwinski, Maciej Wiśniewski, Paweł Moszczyński
In this work, we investigate the application of Machine Learning (ML) algorithms to the identification and quantitative characterization of quantum entanglement in polarization-ent…
Framework for Indoor Wireless Propagation Modeling Through Wireless Insite
Arao Zau Macaia, Niraj Narayan, Rajeev Shukla +8
Multipaths, reflections, diffractions, and material interactions complicate indoor wireless propagation modelling. More than 80% of wireless data is consumed indoors; hence, planni…
LSTM-Based Power Delay Profile Predictions for Intra-Bus Wireless Propagation
Rajeev Shukla, Atharva Verma, Aniruddha Chandra +8
Longlshort-term memory (LSTM) is a deep learning model that can capture long-term dependencies of wireless channel models and is highly adaptable to short-term changes in a wireles…
A Deep Learning Approach to Multipath Component Detection in Power Delay Profiles
Ondrej Zeleny, Radek Zavorka, Ales Prokes +5
Power Delay Profile (PDP) plays a crucial role in wireless communications, providing information on multipath propagation and signal strength variations over time. Accurate detecti…
Microdiversity and Vegetation Influence on Forward Scattering at 60 GHz and 80 GHz
Radek Zavorka, Ondrej Zeleny, Jiri Blumenstein +9
Understanding the impact of vegetation and small-scale antenna movements on signal propagation is important for the design and optimization of high-frequency wireless communication…
Stochastic 3-D Foliage Modeling at 80 GHz: Experimental Validation and Ray-Tracing Simulations
Jiri Blumenstein, Radek Zavorka, Josef Vychodil +10
A stochastic modeling methodology for 3-D foliage is presented, aimed at enhancing ray-tracing simulations. The model supports adjustable stochastic geometry, density, and shape to…
Angularly-Resolved 3D Foliage Modeling and Measurements at 60 and 80 GHz: From Stochastic Geometry to Deterministic Channel Characterization
Jiri Blumenstein, Radek Zavorka, Josef Vychodil +10
In this paper, we show a stochastic approach to generate a 3D model of a foliage, which is then used for deterministic ray-tracing channel modeling. This approach is verified by a…
Comparison of 60 GHz and 80 GHz Vehicle-to-Vehicle Channels Using Delay and Doppler Characteristics
Ales Prokes, Tomas Mikulasek, Josef Vychodil +6
The aim of this paper is to provide a comparison of channel characteristics for vehicle-to-vehicle (V2V) communication at 60 GHz and 80 GHz frequency bands in a high-mobility scena…
Millimeter Wave Path Loss for Diverse Antenna Patterns in Outdoor Environment
Jaroslaw Wojtun, Cezary Ziolkowski, Jan M. Kelner +9
Empirical path loss models are defined for a specific antenna system used during measurements and characterized by a particular radiation pattern and main lobe beam width. In this…
Helix alignment, chevrons, and edge dislocations in twist-bend ferroelectric nematics
Bijaya Basnet, Priyanka Kumari, Sathyanarayana Paladugu +6
We explore surface alignment and edge dislocations in the recently discovered twist-bend ferroelectric nematic, NTBF, in which the vector of spontaneous polarization follows an obl…
Quantum Size Effect in Optically Active Indium Selenide Crystal Phase Heterostructures Grown by Molecular Beam Epitaxy
Piotr Wojnar, Maciej Wojcik, Piotr Baranowski +9
Indium selenide attracts the interest due to its outstanding electronic and optical properties which are potentially prospective in view of applications in electronic and photonic…
Selective reflection of light in glassforming ternary liquid crystalline mixtures
Aleksandra Deptuch, Zuzanna Zając, Marcin Piwowarczyk +4
Two ternary liquid crystalline mixtures are formulated and investigated by differential scanning calorimetry, polarizing optical microscopy, X-ray diffraction, and broadband dielec…
Electrically reconfigurable extended lasing state in an organic liquid-crystal microcavity
Dmitriy Dovzhenko, Luciano Siliano Ricco, Krzysztof Sawicki +12
Small-footprint, low-power arrays of coupled coherent emitters with the capability of near- and far-field engineering and coherence control are highly sought after to meet modern n…
New self-organized benzo[b]thiophene-based materials for GHz applications
Agnieszka Mieczkowska, Jakub Herman, Natan Rychlowicz +2
This research delves into the synthesis and characterization of novel liquid crystal compounds derived from benzo[b]Ithiophene cores, focusing on their potential applications in mi…
Banana DNA derivatives as homeotropic alignment layers in optical devices
Rafał Węgłowski, Anna Spadło, Dorota Węgłowska
In this study, deoxyribonucleic acid (DNA) from bananas was extracted and functionalized and used for the first time as a homeotropic alignment layer for liquid crystals (LCs). Our…
Terahertz magnon-polaritons control using a tunable liquid crystal cavity
Dmitriy Yavorskiy, Jan Suffczyński, Rafał Kowerdziej +4
Strong coupling of light to a collective spin excitation in antiferromagnets gives rise to hybrid modes called magnon-polaritons. They are highly promising for data manipulation an…
Low-energy excitations in multiple modulation-doped CdTe/(CdMg)Te quantum wells
D. Yavorskiy, F. Le Mardelé, I. Mohelsky +6
Low energy excitations of a two-dimensional electron gas (2DEG) in modulation-doped multiple (ten) quantum wells (QWs) was studied using far-infrared magneto-transmission technique…
Channel impulse response peak clustering using neural networks
Petr Horky, Ales Prokes, Radek Zavorka +4
This paper introduces an approach to process channel sounder data acquired from Channel Impulse Response (CIR) of 60GHz and 80GHz channel sounder systems, through the integration o…
Comparative analysis of clustering methods for power delay profile in MMW bands and in-vehicle scenarios
Radek Zavorka, Ales Prokes, Josef Vychodil +6
The spatial statistics of radio wave propagation in specific environments and scenarios, as well as being able to recognize important signal components, are prerequisites for depen…
Channel modeling for 60 GHz fixed mmWave O2I and O2O uplink with angular misalignment
Nitisha Singh, Sahaj K. Jha, Aniruddha Chandra +8
In this letter, we examine the effect of misalignment angle on cluster-based power delay profile (PDP) modeling for a 60 GHz millimeter-wave uplink. The analysis uses real-world da…
Power angular spectrum versus Doppler spectrum -- Measurements and analysis
Jan M. Kelner, Cezary Ziolkowski, Michal Kryk +9
In this paper, we present an empirical verification of the method of determining the Doppler spectrum (DS) from the power angular spectrum (PAS). Measurements were made for the fre…
Spectral efficiency for mmWave downlink with beam misalignment in urban macro scenario
Jaroslaw Wojtun, Cezary Ziolkowski, Jan M. Kelner +7
In this paper, we analyze the spectral efficiency for millimeter wave downlink with beam misalignment in urban macro scenario. For this purpose, we use a new approach based on the…
Low-temperature structural study of smectic C* glass by X-ray diffraction
Aleksandra Deptuch, Marcin Kozieł, Marcin Piwowarczyk +2
The liquid crystalline compound, forming the glass of the smectic C* phase, is investigated by the X-ray diffraction in the 18-298 K range. The characteristic distances within…