44 citations · 109 across the 24 of their papers we have counts for
24 papers
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…
Vehicle-to-Vehicle Millimeter-Wave Channel Characterization at 60 and 80 GHz
Radek Zavorka, Tomas Mikulasek, Josef Vychodil +9
This paper presents results from a vehicle-to-vehicle channel measurement campaign conducted in the millimeter-wave (MMW) frequency bands at center frequencies of 60GHz and 80GHz,…
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…
6G NTN Waveforms: A Comparison of OTFS, AFDM and OCDM in LEO Satellite Channels
Baidyanath Mandal, Aniruddha Chandra, Rastislav Roka +3
Sixth generation (6G) physical layer (PHY) is evolving beyond the legacy orthogonal frequency division multiplexing (OFDM)-based waveforms. In this paper, we compare the bit error…
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…
Synthesis of omnidirectional path loss model based on directional model and multi-elliptical geometry
Jaroslaw Wojtun, Cezary Ziolkowski, Jan M. Kelner +7
Millimeter wave (mmWave) technology offers high throughput but has a limited radio range, necessitating the use of directional antennas or beamforming systems such as massive MIMO.…
Variability of radio signal attenuation by single deciduous tree versus reception angle at 80 GHz
Jaroslaw Wojtun, Cezary Ziolkowski, Jan M. Kelner +7
Vegetation significantly affects radio signal attenuation, influenced by factors such as signal frequency, plant species, and foliage density. Existing attenuation models typically…
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…
Correlation properties of signal at mobile receiver for different propagation environments
Cezary Ziolkowski, Jan M. Kelner, Leszek Nowosielski
An issue of the parameter selection in various branches of a multi-antenna receiver system determines its effectiveness. A significant effect on these parameters are correlation pr…
Modeling power angle spectrum and antenna pattern directions in multipath propagation environment
Jan M. Kelner, Cezary Ziolkowski
Most propagation models do not consider the influence of antenna patterns on the parameters and characteristics of received signals. This assumption is equivalent to the use of iso…
Path loss model modification for various gains and directions of antennas
Jan M. Kelner, Cezary Ziolkowski
Emerging telecommunication technologies like 5G, green communications, and massive MIMO contribute to the use of directional antennas and beamforming. For this reason, modern propa…
Evaluation of angular dispersion for various propagation environments in emerging 5G systems
Jan M. Kelner, Cezary Ziolkowski, Bogdan Uljasz
Angular dispersion is the effect of a multi-path propagation observed in received signals. An assessment of this phenomenon is particularly important from the viewpoint of emerging…
Comparison of angular spread for 6 and 60 GHz based on 3GPP standard
Jan M. Kelner, Cezary Ziolkowski, Bogdan Uljasz
In an urban environment, a multipath propagation is one of the basic phenomena affecting a quality of received signals. This causes dispersions in time and angular domains. Basic p…
Modeling the distribution of the arrival angle based on transmitter antenna pattern
Cezary Ziolkowski, Jan M. Kelner, Leszek Nowosielski +1
An angular distribution of received signals has a significant impact on their spectral and correlational properties. Most of angular dispersion models do not consider antenna patte…
Statistical evaluation of the azimuth and elevation angles seen at the output of the receiving antenna
Cezary Ziolkowski, Jan M. Kelner
A method to evaluate the statistical properties of the reception angle seen at the input receiver that considers the receiving antenna pattern is presented. In particular, the impa…
Radio bearing of sources with directional antennas in urban environment
Cezary Ziolkowski, Jan M. Kelner
This paper focuses on assessing the limitations in the direction-finding process of radio sources with directional antennas in an urbanized environment, demonstrating how signal so…