COMPUTER NETWORKS AND COMMUNICATIONS
WIRELESS COMMUNICATION TECHNOLOGIES
Question
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Large scale propagation model


Small scale propagation model


Fading model


Okumura model

Detailed explanation1: Explanation: Large scale propagation model are useful in estimating the radio coverage area of a transmitter. They can predict the mean signal strength for an arbitrary transmitterreceiver (TR) separation distance.
Detailed explanation2: Propagation models that predict the mean signal strength for an arbitrary transmitterreceiver (TR) separation distance which is useful in estimating the radio coverage area of a transmitter are called largescale propagation models, since they characterize signal strength over large TR separation distances.
Detailed explanation3: Radio propagation models are broadly classified into large scale and small scale models. Large scale effects typically occur in the order of hundreds to thousands of meters in distance. Small scale effects are localized and occur temporally (in the order of a few seconds) or spatially (in the order of a few meters).
Detailed explanation4: A radio propagation model describes the behavior of the signal while it is transmitted from the transmitter towards the receiver. It gives a relation between the distance of transmitter & receiver and the path loss. From this relation, one can get an idea about the allowed path loss and the maximum cell range.
Detailed explanation5: Answer:aExplanation: Small scale propagation model is also called fading model. Fading modelcharacterize the rapid fluctuations of the received signal strength over very short distance of afew wavelengths or short time duration. The propagation models are used to estimate theperformance of wireless channels.