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In this paper, results of wideband dual polarised measurements conducted at the science site campus of Durham University in different indoor environments are presented. The measurements were performed in two of the frequency bands in the V band identified by the World Radiocommunication Conference in 2015 (WRC15) using a state of the art 2 by 2 Multiple Input Multiple Output (MIMO) multiband chirp...
In this article, patch antennas were used for transmission and reception of a 2.4 GHz radio frequency signal. The aim is to characterize the propagation channel using directive antennas in an underground mining gallery. Satisfactory channel parameters' results were achieved, based on measurements.
The propagation characteristics of ultra-wideband (UWB) signal have been a popular topic in wireless communications with the advantages of large bandwidth and high communication rate. This paper studies on the multipath propagation characteristics of UWB signal for indoor laboratory environment by time domain ray tracing method. Also, reflection, diffraction, transmission and direct rays are all considered...
This study focuses on the statistical properties of the Power Delay Profile (PDP) and path loss results at 5.9 GHz for the indoor environment. The measurement campaign was conducted by using a 5.9 GHz channel sounder to extract the characterization of the indoor radio channel. The successive PDP of our measurement data is presented and statistical properties of mean delay and RMS delay spread is investigated...
This paper presents 28 GHz and 73 GHz millimeter-wave propagation measurements performed in a typical office environment using a 400 Megachip-per-second broadband sliding correlator channel sounder and highly directional steerable 15 dBi (30° beamwidth) and 20 dBi (15° beamwidth) horn antennas. Power delay profiles were acquired for 48 transmitter-receiver location combinations over distances ranging...
This paper presents and analyzes the results of medium range propagation channel measurements with and without the presence of a reflecting obstacle at 60 GHz. Root-Mean-Square (RMS) delay spread, path loss and signal intensity are investigated. A strong relationship is found between the use of a reflector and the received signal strength. An RMS delay spread is established to help identify a possibility...
As use of unmanned aircraft systems (UAS) is expected to dramatically increase in the coming years, and two new frequency bands (960-977 MHz in L-band and 5030-5091 MHz in C-band) have been allocated for future control and non-payload communications for UAS civil applications, characterization of the air-ground channel becomes essential. Directional ground station (GS) antennas are expected to be...
In this paper, the results of the path loss exponent and time dispersion parameters obtained from a set of channel measurements conducted in outdoor roadway environment, typical of Infostation network scenario is presented. The measurement procedure takes into account the practical scenarios that is characteristic of the positions and movements of users in the network. The measurements were carried...
60 GHz radio channel propagation characteristics in indoor office environment are addressed in this paper using full 3-Dimensional ray tracing of Wireless InSite and a simple deterministic 2-Dimensional model utilizing Ray-tracing technique. The comparisons are made with free space model and site-general prediction model of ITU-R. Values of the path gain, rms delay spread for sectoral horn and omni-directional...
Industrial applications of wireless sensor networks often involve radio-harsh environments. These industrial settings typically include an abundance of metallic structures which obstruct, reflect, refract and scatter signals. As a result, RF channel modeling for these environments becomes necessary and important. In this paper, a WSN testbed emulating realistic industrial environments was constructed...
We investigate the reliability of radio channel simulators in capturing the important properties of radio channels throughout a well-specified environment. Indoor environments for which the geometric layout and material properties of surfaces are known lend themselves to such site-specific simulation. Our aim is to assess the performance of this approach by comparing its predictions with measurements...
This paper reports on the aircraft cabin UWB channel modeling based on a measurement campaign conducted on board an Airbus A319 cabin in the frequency range from 3 - 8 GHz. Besides path loss (L) and time dispersion parameters (maximum excess delay (taumax), RMS delay spread (sigmatau)), a modified Saleh-Velenuela (SV) model is derived for this new environment.
A proposed approach in this paper presents a potential model for predicting both path loss, RMS delay spread, and decay characteristics of a room propagation power delay profile. Several parameters are needed to construct the model, including the room volume, surface, and the average power reflected. A roompsilas average or total absorption rate is found using the impulse response sounder system based...
In this paper we analyze the statistics of widely-used channel parameters (like path loss, rms delay spread and excess delay) at 5.2 GHz in an urban scenario. For this purpose we evaluate broadband time-variant channel measurements. Succeeding we present the results split into two scenario groups, consisting of LOS and NLOS components and NLOS component solely. Within the evaluation, the widely accepted...
In this paper, based on indoor ultra-wide band (UWB) propagation channel measurements for both LOS and NLOS scenarios, the frequency dependency of propagation in the 3-10 GHz UWB range is investigated by examining the power delay profile, rms delay spread, path loss and shadowing as functions of frequency. Moreover, the bandwidth dependency of channel parameters is also investigated for gaining more...
This paper presents the results of indoor propagation measurements performed in a corridor (LOS) and a hall with both LOS and NLOS measurement routes at 60 GHz. The channel dispersion and fading effects are analyzed by examining the rms delay spread, path loss and shadowing. Moreover, the correlation properties between dispersion and fading effects are investigated, and negative cross-correlation...
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