Statistical distributions of fields in urban environment based on Monte Carlo simulations of Maxwell equations

Xu, Peng; Lam, King Wai; Tsang, Leung; Lai, Kin Lun

doi:10.1109/lawp.2004.827896

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…하지만 이러한 모델은 실제 발사체 주변의 세부 적인 지형 및 지물을 정확하게 모사하지 않고 통계적으 로 접근하여 예측하기 때문에 높은 신뢰도의 결과값을 얻기에는 한계가 있다. 일부 선행연구에서는 구조물 및 지형 등을 모델링하고, 광선추적법 기반의 전파 해석도구 를 활용하여 전파특성을 분석한 사례가 있으나, 대부분 이동통신 응용분야에 대한 연구로 한정되어 있다 [16], [17] . 한 편, 국내 발사체 주변에서 시험 측정을 통해 전파 특성을 확인하려는 연구 [18], [19] 가 수행되었으나 정밀한 M&S(modeling and simulation)가 동시에 수행되지 않아 측정결과의 검증 이 어려울 뿐더러, 측정이 용이하지 않은 상황에서는 결과 를 예측하기 어려운 한계가 있다.…”

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Predicting Radio Wave Scattering Characteristics by the Environment around the Projectile

Jang,

Wang,

Kim

et al. 2022

J. Korean Inst. Electromagn. Eng. Sci.

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In this study, we propose a method for predicting the characteristics of radio wave scattering based on the environment around the projectile transmitting information through a telemetry communication channel. Terrain and buildings are included in the integrated simulation model to analyze the wave propagation characteristics around the projectile. The propagation path between the projectile and control tower is investigated by observing both the direct and indirect paths. The simulation results show that the received power of the indirect path is 7.6−8 dB lower than that of the direct path, which indicates that the structures around the projectile have a greater effect on the received power than the terrain. To verify these results, the measurement equipment is placed at the Naro Space Center and the consequent path loss between the transmitter and receiver is measured. The received powers measured in reference to the transmitter position are between -77.3 dBm and -70.5 dBm (transmitted power of 20 dBm), which is in good agreement with the simulation data.

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Predicting Radio Wave Scattering Characteristics by the Environment around the Projectile

Jang,

Wang,

Kim

et al. 2022

J. Korean Inst. Electromagn. Eng. Sci.

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Propagation over terrain and urban environment using the multilevel UV method and a hybrid UV/SDFMM method

Tsang

2004

Antennas Wirel. Propag. Lett.

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Propagation over terrain and urban environment are studied using two-dimensional simulations of Maxwell equations. For the case of terrain propagation, the multilevel UV method is used to accelerate method of moments (MoM) solution. We consider propagation over a region of 14.42 km at 1,500 MHz that has 720,896 MoM surface unknowns. For the case of urban environment, because of the sharp rise in surface heights, we use a hybrid UV/SDFMM method. We consider a problem over 2.3 km with building heights of 18 m for 90,112 MoM surface unknowns at 900 MHz. Computations of all cases were performed with a single processor. Based on the simulations, we study fading and signal amplitude variation with distance.Index Terms-Channel model, computational electromagnetics, fading.

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Method for Estimating Optimal Position of S-Band Relay Station through Path Loss Analysis in an Outdoor Environment

et al. 2020

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This article investigates a novel estimation method to optimize the position of a relay station of the S-band telemetry system in outdoor environments. To determine an optimal relay station position, complex terrain surface and buildings near the Naro Space Center are included in the EM (Electromagnetic) simulation. The optimal relay station position is then determined using the estimation method by comparing the path losses from the rocket to the main station and some candidate positions of the relay station. To better understand the path loss, the ray analysis is also conducted, and the result demonstrates that once the rocket altitude to be covered by the relay station is determined, it is possible to find the optimum position of the relay station.

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Statistical distributions of fields in urban environment based on Monte Carlo simulations of Maxwell equations

Cited by 3 publications

References 7 publications

Predicting Radio Wave Scattering Characteristics by the Environment around the Projectile

Predicting Radio Wave Scattering Characteristics by the Environment around the Projectile

Propagation over terrain and urban environment using the multilevel UV method and a hybrid UV/SDFMM method

Method for Estimating Optimal Position of S-Band Relay Station through Path Loss Analysis in an Outdoor Environment

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