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Vegetation significantly affects radio signal attenuation, influenced by factors such as signal frequency, plant species, and foliage density. Existing attenuation models typically address specific scenarios, like single trees, rows of trees, or green spaces, with the ITU-R P.833 recommendation being a widely recognized standard. Most assessments f...
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Context 1
... in Fig. 1, 1000 measurements of the channel impulse response (CIR) were performed. Based on them, we determined the received signal spectra and calculated their powers. The empirical cumulative distribution functions (ECDFs) of the relative received power for the individual receiver positions and maximum bandwidth (i.e., 1960 MHz) are shown in Fig. 2. The power distributions for the three receiver positions are close to normal with similar deviations, while for í µí»¼ = 145°, the ECDF shape is similar to bimodal. This differentiation may be due to diverse propagation conditions. For the reception angle í µí»¼ = 145°, the received signal may be partly scattered by the tree and ...
Context 2
... to bimodal. This differentiation may be due to diverse propagation conditions. For the reception angle í µí»¼ = 145°, the received signal may be partly scattered by the tree and partly received directly from the transmitter. In this case, the best line-of-sight (LOS) conditions occur, and the average power is the highest (í µí± ̅ = 38 dB, see Fig. 2). For the other reception directions, the signal is primarily scattered by the ...
