# COMPUTER FUNDAMENTALS

## COMPUTER NETWORKS AND COMMUNICATIONS

### WIRELESS COMMUNICATION TECHNOLOGIES

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The propagation model that estimates radio coverage of a transmitter is called ____
 A Large scale propagation model B Small scale propagation model C Fading model D Okumura model
Explanation:

Detailed explanation-1: -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-2: -Propagation models that predict the mean signal strength for an arbitrary transmitter-receiver (T-R) separation distance which is useful in estimating the radio coverage area of a transmitter are called large-scale propagation models, since they characterize signal strength over large T-R separation distances.

Detailed explanation-3: -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 explanation-4: -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 explanation-5: -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.

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