Results 1 to 10 of about 555,563 (301)

Physical-Statistical Modeling of Dynamic Indoor Power Delay Profiles [PDF]

IEEE Transactions on Wireless Communications, 2017
This paper presents a physical-statistical radio channel power delay profiles model for room-to-room communication systems combining the room electromagnetic theory for modeling deterministic channel components with a geometry-based stochastic channel model with time-variant statistics for modeling stochastic components.
Vinogradov, Evgenii, Bamba, Aliou, Joseph, Wout, Oestges, Claude   +3 more
openaire   +7 more sources

Power delay profile and noise variance estimation for OFDM [PDF]

IEEE Communications Letters, 2006
In this letter, we present cyclic-prefix (CP) based noise-variance and power-delay-profile estimators for Orthogonal Frequency Division Multiplexing (OFDM) systems. Signal correlation due to the use of the CP is exploited without requiring additional pilot symbols.
Cui, Tao, Tellambura, Chintha
openaire   +5 more sources

UWB Radio-Based Motion Detection System for Assisted Living

Sensors, 2021
Because of the ageing population, the demand for assisted living solutions that can help prolonging independent living of elderly at their homes with reduced interaction with caregivers is rapidly increasing.
Klemen Bregar, Andrej Hrovat, Mihael Mohorčič   +2 more
doaj   +1 more source

Stochastic Channel Parameters for Train-to-Train Communications

IEEE Open Journal of Antennas and Propagation, 2021
The profound knowledge of radio wave propagation is essential for the design and test of wireless communication systems especially in demanding environments and for mobile transmitters and receivers.
Paul Unterhuber, Michael Walter, Uwe-Carsten Fiebig, Thomas Kurner   +3 more
doaj   +1 more source

Power delay profiles for a wireless endoscopy link [PDF]

2013 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2013
In this work, we investigate power delay profiles for a wireless in-to-out-body endoscopy link. A hospital scenario is considered where endoscopy images taken inside the body are wirelessly transmitted to a monitoring device outside the body. We distinguish between a direct in-to-out-body link and a dual-hop relay link where the image data is first ...
Joseph, Wout, Tanghe, Emmeric, Van Torre, Patrick, Vermeeren, Günter, Agneessens, Sam, Rogier, Hendrik, Martens, Luc   +6 more
openaire   +2 more sources

Power Delay Profile Based Ranging via Approximate EM-ReVAMP

2023 IEEE 28th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), 2023
Accurate distance estimation is of utmost importance in enabling seamless positioning and location-based services for 5G and Beyond 5G (B5G) networks. This paperfocuses on addressing the ranging problem caused by multipath propagation, utilizing the widely adopted Nakagami-m amplitude fading model.
Xiao, Fangqing, Zhao, Zilu, Slock, Dirk
openaire   +2 more sources

Time dependence of Bragg forward scattering and self-seeding of hard x-ray free-electron lasers [PDF]

, 2012
Free-electron lasers (FELs) can now generate temporally short, high power x-ray pulses of unprecedented brightness, even though their longitudinal coherence is relatively poor.
A. Authier, A. M. Kondratenko, M. von Laue, P. R. Garabedian, R. R. Lindberg, S. D. Shastri, V. G. Pinsker, W. H. Zachariasen, Yu. Shvyd’ko, Yu. V. Shvyd’ko   +9 more
core   +7 more sources

Using the Power Delay Profile to Accelerate the Training of Neural Network-Based Classifiers for the Identification of LOS and NLOS UWB Propagation Conditions

IEEE Access, 2020
ultra-wideband (UWB) technology enables centimeter-level localization systems based on the accurate estimation of the actual distance between transmitter and receiver, by means of the precise estimation of the signal time-of-flight. However, this is only
Valentin Barral Vales, Tomas Dominguez-Bolano, Carlos J. Escudero, Jose A. Garcia-Naya   +3 more
doaj   +1 more source

Precise Power Delay Profiling with Commodity Wi-Fi

IEEE Transactions on Mobile Computing, 2015
Power delay profiles characterize multipath channel features, which are widely used in motion- or localization-based applications. Recent studies show that the power delay profile may be derived from the CSI traces collected from commodity WiFi devices, but the performance is limited by two dominating factors.
Yaxiong Xie, Zhenjiang Li, Mo Li
openaire   +3 more sources

Analysis and optimization of pilot symbol-assisted Rake receivers for DS-CDMA systems [PDF]

, 2006
The effect of imperfect channel estimation (CE) on the performance of pilot-symbol-assisted modulation (PSAM) and MRC Rake reception over time- or frequency-selective fading channels with either a uniform power delay profile (UPDP) or a nonuniform power ...
Cui, Tao, Tellambura, Chintha
core   +1 more source