Path-Loss Prediction of Radio Wave Propagation in an Orchard by Using Modified Utd Method

Phaebua, Kittisak; Phongcharoenpanich, Chuwong; Krairiksh, M.; Lertwiriyaprapa, Titipong

doi:10.2528/pier12040106

Cited by 15 publications

(15 citation statements)

References 28 publications

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“…In order to respond to the growing demand for high-performance radio communication systems in complex environments, a number of contributions have been made to predict the propagation characteristics in the last decades [1][2][3][4][5][6][7][8][9][10][11][12]. As one of the most common environments, a tunnel can generate various specific mechanisms when the electromagnetic wave propagates inside it.…”

Section: Introductionmentioning

confidence: 99%

Five-Zone Propagation Model for Large-Size Vehicles Inside Tunnels

Guan¹,

Zhang²,

Ai³

et al. 2013

PIER

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Abstract-An accurate characterization of the wave propagation inside tunnels is of practical importance for the design of advanced communication systems. This paper presents a five-zone propagation model for large-size vehicles inside tunnels. Compared with existing models, the proposed model considers the influence of the large size of the vehicle, and covers all propagation mechanism zones and their dividing points. When a large-size vehicle is passing the transmitter, the received power suffers a deep fading as the direct wave is blocked by the vehicle itself. This zone is called the near shadowing zone. Then, when the vehicle has moved past the transmitter, the line of sight is recovered. If the vehicle is still close to the transmitter, the free space propagation zone starts. Then, as the distance increases, the vehicle enters the multi-mode propagation zone, where higher order modes are significant. Further away, when high order modes are greatly attenuated, guided propagation is stabilized. Finally, when the vehicle is extremely far from the transmitter, the waveguide effect vanishes because of the attenuation of reflected rays. Two sets of measurements are employed to validate the model. Results show good agreement, and therefore, the model presents an effective way to predict the propagation inside tunnels for large-size vehicles.

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Section: Introductionmentioning

confidence: 99%

Five-Zone Propagation Model for Large-Size Vehicles Inside Tunnels

Guan¹,

Zhang²,

Ai³

et al. 2013

PIER

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show abstract

“…Thus, the signal arriving at the receiver will not come in a single fringe, but as a pack of signals with different amplitudes, phases, angles of arrival, and short time delays, being delayed copies of the original signal [7][8][9][10][11][12][13][14][15][16]. Once collected within a certain time span at a receiver, they sum up in a vector fashion, accounting for their relative phase differences, which causes some copies to overlap constructively if both are in phase or cancel out otherwise.…”

Section: The Radio Channel In the Multipath Environmentmentioning

confidence: 99%

Measurement Evaluation of the TGN Radio Channel Models Usefulness in Predicting Wlan Performance

Staniec¹,

Kowal²

2013

PIER

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Abstract-The purpose of this paper is to discuss the applicability of the TGn radio channel models in estimating the performance of WLAN transmission. The specificity of the indoor radiowave propagation is first discussed, then TGn models are introduced together with a deterministic propagation model created by the authors for predicting the radio channel higher-order parameters. Intensive WLAN measurements have been carried out in two representative propagation environments and compared to theoretical predictions obtained in four configurations: beginning with the original TGN channel models, then enhancing them by including deterministically simulated pathloss and impulse responses and eventually by generating the channel impulse response on a purely random basis. The obtained results should indicate how accurately the general TGn channel models match measurements in real environments and how they compare to proposed successive modifications.

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“…These parameters are useful in describing the overall characteristics of the multipath profile and are essential in developing design guidelines for a wireless system [24][25][26]. The large-scale pathloss, which is the value of the transmit power divided by the locally averaged received power, is given by:…”

Section: Wireless Channel Modelingmentioning

confidence: 99%

Hybrid Simulation Technique for Characterizing Wireless Channel in Medical Environments

Lee¹,

Bui²

2013

PIER

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Abstract-The purpose of this paper is to investigate the use of simulation technology for the analysis of wireless propagation channel in medical environments. In this paper, the channel modeling has been carried out by using an effective simulation platform, which combines full-wave Method of Moments and adaptive ray tracing technique. Base on this, the channel characteristics involving both large-scale and small-scale parameters of a wireless network deployed within a hospital environment can be estimated. Also, it is straightforward to predict the levels of electromagnetic field interference produced from the network infrastructure. The simulated results of four scenarios of medical environment, such as the patient room, the operating room, a particular level of the hospital, and the cardiac stress test room, with different wireless technologies used show the advantage and capability of the presented simulation approach.

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Path-Loss Prediction of Radio Wave Propagation in an Orchard by Using Modified Utd Method

Cited by 15 publications

References 28 publications

Five-Zone Propagation Model for Large-Size Vehicles Inside Tunnels

Five-Zone Propagation Model for Large-Size Vehicles Inside Tunnels

Measurement Evaluation of the TGN Radio Channel Models Usefulness in Predicting Wlan Performance

Hybrid Simulation Technique for Characterizing Wireless Channel in Medical Environments

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