Abstract
This article proposes a deterministic radio propagation model using dyadic Green's function to predict the value of the electric field. Dyadic is offered as an efficient mathematical tool which has symbolic simplicity and robustness, as well as taking account of the anisotropy of the medium. The proposed model is an important contribution for the UHF band because it considers climatic conditions by changing the constants of the medium. Most models and recommendations that include an approach for climatic conditions, are designed for satellite links, mainly Ku and Ka bands. The results obtained by simulation are compared and validated with data from a Digital Television Station measurement campaigns conducted in the Belem city in Amazon region during two seasons. The proposed model was able to provide satisfactory results by differentiating between the curves for dry and wet soil and these corroborate the measured data, (the RMS errors are between 2-5 dB in the case under study).
Highlights
An appropriate performance for a wireless communication system depends on its ability to predict the power/electric field in a given area
This paper examines the use of dyadic Green's functions (DGF) to estimate the received power of a digital TV station in the frequency range of 470 MHz to 900 MHz, showing an important contribution this area
This paper proposed a propagation model for UHF band based on DGF that considers the climatic conditions of the environment, and that leads to deterministic radio propagation models
Summary
An appropriate performance for a wireless communication system depends on its ability to predict the power/electric field in a given area. A more wide-ranging and rigorous analysis for calculating the electric field can be achieved through the use of dyadic Green's functions (DGF). They were used to analyze the propagation in waveguides, resonant cavities and propagation in semi-infinite or layered media [2]-[4]. The proposed model estimates values of electric field and received power for UHF waves through a formulation for three layers (ground, buildings/vegetation and air) and gives priority to information about the climatic conditions of the considered medium. In the propagation problem considered here, which is restricted to the far field, it can be assumed that the magnitudes are much less than ρ (radial distance between the current source and the observation point). After the necessary adjustments have been made, the electric field is given by:
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