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Millimeter wave (mmWave) communication has become a promising key technology of the fifth generation (5G) communication systems, and gained extensive interests. In this paper, we examine 60 GHz mmWave channels in an indoor office environment by means of ray tracing method. Based on geometrical optic (GO) and uniform theory of diffraction (UTD), ray tracing method uses computer simulation to approximate...
With the development of wireless communication, the characteristics of radio propagation become more and more important. Channel measurement and computer simulation are widely used in radio propagation research. For convenience, simulation based on FEKO was presented in this paper. The effect of frequency, antenna location, antenna height and conductivity on propagation characteristics in corridor...
The next generation of intelligent vehicle systems will use wireless communication to connect a car and its passengers. It is therefore important to understand the in-cabin propagation characteristics of an automobile. This paper investigates the wireless channel native to these cabin enclosures. We present detailed, polarization dependent field measurements over a plane of interest in the cabin,...
The near-field validation of the numerical models of portable wireless devices is becoming indispensable, especially, when checking SAR (specific absorption rate) compliance for regulatory limits by computer simulation. The current practice for such validation is to compare measured and simulated electromagnetic fields in a standard flat phantom. This paper proves that a cheaper and faster technique...
In this paper we present the results and the assessment of a statistical analysis of the wireless sensor networks (WSN) radio channel in indoor office scenarios. The work is based on an extensive set of received signal strength (RSS) measurements collected within different typical indoor spaces and node placement scenarios. Results are compared with corresponding values from the log-distance model,...
A simulation model for analyzing electromagnetic on-body wave propagations is proposed. The simulation method utilizes motion capture input data, a simplified human phantom model, and full wave electromagnetic simulation methods. A comparison of simulation results and experimental data for differently-sized human body models is shown.
In this paper, we design the wireless link of a novel vascular stent antenna, which is a key component of future in-vessel telemetry systems. To achieve an efficient link, both the antenna loss and propagation loss should be characterized and minimized. Firstly, a detailed computational model of tissue-induced path loss is proposed and validated to characterize path loss. Meanwhile, antenna loss is...
In this work, 60 GHz radio wave propagation mea- surements at 40 m underground mine gallery and its statistical modeling are presented. Different antennas such as horn and omnidirectional with horizontal (H) and vertical (V) polarizations employing 0.46 ns time resolution have been considered during the campaign. Results that vertical polarization, a higher number of multipath higher RMS (root mean...
In this paper, we are interested in the capacity computations of an underground mine channel in the millimeter wave band. A model of the channel based on the power delay profile (PDP) between transmitter and receiver is obtained from the channel measurements in the CANMET mine at the 70 m level. The channel model is examined under two scenarios, namely horn-horn and horn-omni antennas, in a line of...
The objective of this paper is to illustrate the physics associated with the propagation of mobile wireless communication signals. It is shown that an electromagnetic macro model can predict the nature of the path loss exponent in a mobile cellular wireless communication without the use of a statistical model which is devoid of basic physics. Hence this paper makes it possible to analyze propagation...
Measurements of the 60 GHz ultra-wideband (UWB) indoor channel done in a modern office building at the University of L'Aquila, Italy, are presented. The UWB channel sounder is based on a PN-sequence correlation technique with a pulse width of 0.8 ns. Signals are recorded in different locations in line-of-sight and non-line-of-sight scenarios, and for each location the receiver is moved over a grid...
Location estimation is a fundamental middleware for enabling location based services. Different Radio propagation models, customarily used in wireless networks planning, can be useful for localizing mobile nodes by estimating the transmitter-receiver distance from the Received Signal Strength (RSS). However, most of these localization methods need a prior knowledge of the Effective Isotropic Radiated...
Significant improvements in the quality and reliability of indoor WLAN communications are claimed for devices with MIMO technology applying 802.11n standards, that allow users to achieve a theoretical data rate up to 300-600 Mbps on a single transmission. This paper presents an analysis of a commercial 802.11n MIMO 2??e3 dual band (2.4 and 5 GHz) system focusing on the operational throughput performance...
Ray tracing based on geometric optics can be utilized for generating propagation models for arbitrary and complex environments. These methods can be employed to determine important wireless channel characteristics such as coherence and delay spread. In this paper, an image theory based ray tracing method is used to study ultra-wideband propagation in complex tunnel environments such as curved tunnels...
In this article, we propose a new hybrid modeling method for indoor-to-outdoor radio coverage prediction. The proposed method is a combination of a ray-optical channel modeling approach and the frequency domain ParFlow method. While the former is widely used for modeling outdoor propagation environments, the latter is computationally efficient and accurate for modeling indoor environments.
The performance of voice, video and data streaming applications using the recently developed standard 802.11n with its MIMO antenna options, strongly depends on the nature of the environment. Although many authors have provided evidence on the effectiveness of this technology in field strength distribution, throughput or propagation-simulation environments, work linking all of these parameters is...
The characterization of the wireless channel on board a cruise ship is considered by means of frequency domain measurements of received power and propagation attenuation. This electromagnetic environment is rather new and is characterized by abundance of reflecting surfaces and diffracting elements, so that a significant difference with respect to more common residential and office environments has...
This paper describes some latest developments in the area of propagation channel modeling for new wireless access technologies. A brief overview of current wireless communication systems is presented and the principles of emerging technologies as MIMO, UWB, and 60 GHz systems are introduced. The characterization, modeling, and simulation of the propagation channel are particularly critical in the...
This paper presents a simulation environment, based on the parallel finite-difference time-domain (FDTD) method, for subject-specific radio channel modeling in wireless body sensor networks (WBSNs). The simulation environment takes into account realistic antenna radiation patterns in channel modeling to analyze their effects on WBSNs. The proposed simulation tool is applied to a study of body communication...
This paper signifies the distributed electromagnetic simulation for different thin wired antennas or structures mounted on earth or vehicles or space shuttle for communication purposes. A lot of electromagnetic analysis softwares are available commercially. This paper presents some simulation results of different antennas using Wire-MoM based on thin-wire approximation. The method gives frequency...
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