COMPUTER NETWORKS AND COMMUNICATIONS
WIRELESS COMMUNICATION TECHNOLOGIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Propogation Models
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Propagation Mechanisms
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Power Delay Profiles
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Channel Line Models
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Detailed explanation-1: -Free Space Propagation Model. The free space propagation model is used to predict received signal strength when the transmitter and receiver have a clear, unobstructed line-of-sight path between them Friis 1946.
Detailed explanation-2: -d) Okumura model. 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 transmitter-receiver (T-R) separation distance.
Detailed explanation-3: -Okumura’s model is one of the most widely used models for signal prediction in urban areas. This model is applicable for frequencies in the range 150–1920 MHz (although it is typically extrapolated up to 3000 MHz) and distances of 1–100 km.
Detailed explanation-4: -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.