Abstract
The results obtained with a two-dimensional (2-D) propagation model for wireless communications in an urban environment are compared against the results of other propagation models, such as COST-231 Walfisch-Ikegami (1988, 1984), Hata's (1980), and Zhang's (1997).
Highlights
RADIO waves arrive at a mobile station receiver from different directions with different time delays and polarization
Empirical propagation models are often used to determine how many cell sites are required to provide the coverage needed for a wireless network
The propagation model helps to determine where cell sites should be located to achieve an optimal position in the network
Summary
RADIO waves arrive at a mobile station receiver from different directions with different time delays and polarization. Empirical propagation models are often used to determine how many cell sites are required to provide the coverage needed for a wireless network. The propagation model helps to determine where cell sites should be located to achieve an optimal position in the network. If the propagation model used is not effective in providing a realistic path loss estimate, the probability of incorrectly deploying a cell site is high. No propagation model accounts for all variations experienced in practice, the limitations of these models must be known, in order to achieve a good RF engineering design of a wireless network. A two-dimensional ray tracing simulator [1], [2], the polygonal line simulator, has been developed to compute the trajectories between arbitrary locations of the transmitter and receiver, and to provide results in terms of both path-loss and time-delay of each trajectory. Vironment are compared against the numerical results obtained from the two-dimensional ray-tracing approach
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